1 // types.cc -- Go frontend types.
3 // Copyright 2009 The Go Authors. All rights reserved.
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file.
11 #ifndef ENABLE_BUILD_WITH_CXX
23 #ifndef ENABLE_BUILD_WITH_CXX
30 #include "expressions.h"
31 #include "statements.h"
38 Type::Type(Type_classification classification
)
39 : classification_(classification
), tree_(NULL_TREE
),
40 type_descriptor_decl_(NULL_TREE
)
48 // Get the base type for a type--skip names and forward declarations.
53 switch (this->classification_
)
56 return this->named_type()->named_base();
58 return this->forward_declaration_type()->real_type()->base();
67 switch (this->classification_
)
70 return this->named_type()->named_base();
72 return this->forward_declaration_type()->real_type()->base();
78 // Skip defined forward declarations.
84 Forward_declaration_type
* ftype
= t
->forward_declaration_type();
85 while (ftype
!= NULL
&& ftype
->is_defined())
87 t
= ftype
->real_type();
88 ftype
= t
->forward_declaration_type();
94 Type::forwarded() const
97 const Forward_declaration_type
* ftype
= t
->forward_declaration_type();
98 while (ftype
!= NULL
&& ftype
->is_defined())
100 t
= ftype
->real_type();
101 ftype
= t
->forward_declaration_type();
106 // If this is a named type, return it. Otherwise, return NULL.
111 return this->forwarded()->convert_no_base
<Named_type
, TYPE_NAMED
>();
115 Type::named_type() const
117 return this->forwarded()->convert_no_base
<const Named_type
, TYPE_NAMED
>();
120 // Return true if this type is not defined.
123 Type::is_undefined() const
125 return this->forwarded()->forward_declaration_type() != NULL
;
128 // Return true if this is a basic type: a type which is not composed
129 // of other types, and is not void.
132 Type::is_basic_type() const
134 switch (this->classification_
)
157 return this->base()->is_basic_type();
164 // Return true if this is an abstract type.
167 Type::is_abstract() const
169 switch (this->classification())
172 return this->integer_type()->is_abstract();
174 return this->float_type()->is_abstract();
176 return this->complex_type()->is_abstract();
178 return this->is_abstract_string_type();
180 return this->is_abstract_boolean_type();
186 // Return a non-abstract version of an abstract type.
189 Type::make_non_abstract_type()
191 gcc_assert(this->is_abstract());
192 switch (this->classification())
195 return Type::lookup_integer_type("int");
197 return Type::lookup_float_type("float");
199 return Type::lookup_complex_type("complex");
201 return Type::lookup_string_type();
203 return Type::lookup_bool_type();
209 // Return true if this is an error type. Don't give an error if we
210 // try to dereference an undefined forwarding type, as this is called
211 // in the parser when the type may legitimately be undefined.
214 Type::is_error_type() const
216 const Type
* t
= this->forwarded();
217 // Note that we return false for an undefined forward type.
218 switch (t
->classification_
)
223 return t
->named_type()->is_named_error_type();
229 // If this is a pointer type, return the type to which it points.
230 // Otherwise, return NULL.
233 Type::points_to() const
235 const Pointer_type
* ptype
= this->convert
<const Pointer_type
,
237 return ptype
== NULL
? NULL
: ptype
->points_to();
240 // Return whether this is an open array type.
243 Type::is_open_array_type() const
245 return this->array_type() != NULL
&& this->array_type()->length() == NULL
;
248 // Return whether this is the predeclared constant nil being used as a
252 Type::is_nil_constant_as_type() const
254 const Type
* t
= this->forwarded();
255 if (t
->forward_declaration_type() != NULL
)
257 const Named_object
* no
= t
->forward_declaration_type()->named_object();
258 if (no
->is_unknown())
259 no
= no
->unknown_value()->real_named_object();
262 && no
->const_value()->expr()->is_nil_expression())
271 Type::traverse(Type
* type
, Traverse
* traverse
)
273 gcc_assert((traverse
->traverse_mask() & Traverse::traverse_types
) != 0
274 || (traverse
->traverse_mask()
275 & Traverse::traverse_expressions
) != 0);
276 if (traverse
->remember_type(type
))
278 // We have already traversed this type.
279 return TRAVERSE_CONTINUE
;
281 if ((traverse
->traverse_mask() & Traverse::traverse_types
) != 0)
283 int t
= traverse
->type(type
);
284 if (t
== TRAVERSE_EXIT
)
285 return TRAVERSE_EXIT
;
286 else if (t
== TRAVERSE_SKIP_COMPONENTS
)
287 return TRAVERSE_CONTINUE
;
289 // An array type has an expression which we need to traverse if
290 // traverse_expressions is set.
291 if (type
->do_traverse(traverse
) == TRAVERSE_EXIT
)
292 return TRAVERSE_EXIT
;
293 return TRAVERSE_CONTINUE
;
296 // Default implementation for do_traverse for child class.
299 Type::do_traverse(Traverse
*)
301 return TRAVERSE_CONTINUE
;
304 // Return whether two types are identical. If ERRORS_ARE_IDENTICAL,
305 // then return true for all erroneous types; this is used to avoid
306 // cascading errors. If REASON is not NULL, optionally set *REASON to
307 // the reason the types are not identical.
310 Type::are_identical(const Type
* t1
, const Type
* t2
, bool errors_are_identical
,
313 if (t1
== NULL
|| t2
== NULL
)
315 // Something is wrong.
316 return errors_are_identical
? true : t1
== t2
;
319 // Skip defined forward declarations.
320 t1
= t1
->forwarded();
321 t2
= t2
->forwarded();
326 // An undefined forward declaration is an error.
327 if (t1
->forward_declaration_type() != NULL
328 || t2
->forward_declaration_type() != NULL
)
329 return errors_are_identical
;
331 // Avoid cascading errors with error types.
332 if (t1
->is_error_type() || t2
->is_error_type())
334 if (errors_are_identical
)
336 return t1
->is_error_type() && t2
->is_error_type();
339 // Get a good reason for the sink type. Note that the sink type on
340 // the left hand side of an assignment is handled in are_assignable.
341 if (t1
->is_sink_type() || t2
->is_sink_type())
344 *reason
= "invalid use of _";
348 // A named type is only identical to itself.
349 if (t1
->named_type() != NULL
|| t2
->named_type() != NULL
)
352 // Check type shapes.
353 if (t1
->classification() != t2
->classification())
356 switch (t1
->classification())
362 // These types are always identical.
366 return t1
->integer_type()->is_identical(t2
->integer_type());
369 return t1
->float_type()->is_identical(t2
->float_type());
372 return t1
->complex_type()->is_identical(t2
->complex_type());
375 return t1
->function_type()->is_identical(t2
->function_type(),
377 errors_are_identical
,
381 return Type::are_identical(t1
->points_to(), t2
->points_to(),
382 errors_are_identical
, reason
);
385 return t1
->struct_type()->is_identical(t2
->struct_type(),
386 errors_are_identical
);
389 return t1
->array_type()->is_identical(t2
->array_type(),
390 errors_are_identical
);
393 return t1
->map_type()->is_identical(t2
->map_type(),
394 errors_are_identical
);
397 return t1
->channel_type()->is_identical(t2
->channel_type(),
398 errors_are_identical
);
401 return t1
->interface_type()->is_identical(t2
->interface_type(),
402 errors_are_identical
);
404 case TYPE_CALL_MULTIPLE_RESULT
:
406 *reason
= "invalid use of multiple value function call";
414 // Return true if it's OK to have a binary operation with types LHS
415 // and RHS. This is not used for shifts or comparisons.
418 Type::are_compatible_for_binop(const Type
* lhs
, const Type
* rhs
)
420 if (Type::are_identical(lhs
, rhs
, true, NULL
))
423 // A constant of abstract bool type may be mixed with any bool type.
424 if ((rhs
->is_abstract_boolean_type() && lhs
->is_boolean_type())
425 || (lhs
->is_abstract_boolean_type() && rhs
->is_boolean_type()))
428 // A constant of abstract string type may be mixed with any string
430 if ((rhs
->is_abstract_string_type() && lhs
->is_string_type())
431 || (lhs
->is_abstract_string_type() && rhs
->is_string_type()))
437 // A constant of abstract integer, float, or complex type may be
438 // mixed with an integer, float, or complex type.
439 if ((rhs
->is_abstract()
440 && (rhs
->integer_type() != NULL
441 || rhs
->float_type() != NULL
442 || rhs
->complex_type() != NULL
)
443 && (lhs
->integer_type() != NULL
444 || lhs
->float_type() != NULL
445 || lhs
->complex_type() != NULL
))
446 || (lhs
->is_abstract()
447 && (lhs
->integer_type() != NULL
448 || lhs
->float_type() != NULL
449 || lhs
->complex_type() != NULL
)
450 && (rhs
->integer_type() != NULL
451 || rhs
->float_type() != NULL
452 || rhs
->complex_type() != NULL
)))
455 // The nil type may be compared to a pointer, an interface type, a
456 // slice type, a channel type, a map type, or a function type.
457 if (lhs
->is_nil_type()
458 && (rhs
->points_to() != NULL
459 || rhs
->interface_type() != NULL
460 || rhs
->is_open_array_type()
461 || rhs
->map_type() != NULL
462 || rhs
->channel_type() != NULL
463 || rhs
->function_type() != NULL
))
465 if (rhs
->is_nil_type()
466 && (lhs
->points_to() != NULL
467 || lhs
->interface_type() != NULL
468 || lhs
->is_open_array_type()
469 || lhs
->map_type() != NULL
470 || lhs
->channel_type() != NULL
471 || lhs
->function_type() != NULL
))
477 // Return true if a value with type RHS may be assigned to a variable
478 // with type LHS. If REASON is not NULL, set *REASON to the reason
479 // the types are not assignable.
482 Type::are_assignable(const Type
* lhs
, const Type
* rhs
, std::string
* reason
)
484 // Do some checks first. Make sure the types are defined.
486 && rhs
->forwarded()->forward_declaration_type() == NULL
487 && rhs
->is_void_type())
490 *reason
= "non-value used as value";
494 if (lhs
!= NULL
&& lhs
->forwarded()->forward_declaration_type() == NULL
)
496 // Any value may be assigned to the blank identifier.
497 if (lhs
->is_sink_type())
500 // All fields of a struct must be exported, or the assignment
501 // must be in the same package.
502 if (rhs
!= NULL
&& rhs
->forwarded()->forward_declaration_type() == NULL
)
504 if (lhs
->has_hidden_fields(NULL
, reason
)
505 || rhs
->has_hidden_fields(NULL
, reason
))
510 // Identical types are assignable.
511 if (Type::are_identical(lhs
, rhs
, true, reason
))
514 // The types are assignable if they have identical underlying types
515 // and either LHS or RHS is not a named type.
516 if (((lhs
->named_type() != NULL
&& rhs
->named_type() == NULL
)
517 || (rhs
->named_type() != NULL
&& lhs
->named_type() == NULL
))
518 && Type::are_identical(lhs
->base(), rhs
->base(), true, reason
))
521 // The types are assignable if LHS is an interface type and RHS
522 // implements the required methods.
523 const Interface_type
* lhs_interface_type
= lhs
->interface_type();
524 if (lhs_interface_type
!= NULL
)
526 if (lhs_interface_type
->implements_interface(rhs
, reason
))
528 const Interface_type
* rhs_interface_type
= rhs
->interface_type();
529 if (rhs_interface_type
!= NULL
530 && lhs_interface_type
->is_compatible_for_assign(rhs_interface_type
,
535 // The type are assignable if RHS is a bidirectional channel type,
536 // LHS is a channel type, they have identical element types, and
537 // either LHS or RHS is not a named type.
538 if (lhs
->channel_type() != NULL
539 && rhs
->channel_type() != NULL
540 && rhs
->channel_type()->may_send()
541 && rhs
->channel_type()->may_receive()
542 && (lhs
->named_type() == NULL
|| rhs
->named_type() == NULL
)
543 && Type::are_identical(lhs
->channel_type()->element_type(),
544 rhs
->channel_type()->element_type(),
549 // The nil type may be assigned to a pointer, function, slice, map,
550 // channel, or interface type.
551 if (rhs
->is_nil_type()
552 && (lhs
->points_to() != NULL
553 || lhs
->function_type() != NULL
554 || lhs
->is_open_array_type()
555 || lhs
->map_type() != NULL
556 || lhs
->channel_type() != NULL
557 || lhs
->interface_type() != NULL
))
560 // An untyped numeric constant may be assigned to a numeric type if
561 // it is representable in that type.
562 if ((rhs
->is_abstract()
563 && (rhs
->integer_type() != NULL
564 || rhs
->float_type() != NULL
565 || rhs
->complex_type() != NULL
))
566 && (lhs
->integer_type() != NULL
567 || lhs
->float_type() != NULL
568 || lhs
->complex_type() != NULL
))
571 // Give some better error messages.
572 if (reason
!= NULL
&& reason
->empty())
574 if (rhs
->interface_type() != NULL
)
575 reason
->assign(_("need explicit conversion"));
576 else if (rhs
->is_call_multiple_result_type())
577 reason
->assign(_("multiple value function call in "
578 "single value context"));
579 else if (lhs
->named_type() != NULL
&& rhs
->named_type() != NULL
)
581 size_t len
= (lhs
->named_type()->name().length()
582 + rhs
->named_type()->name().length()
584 char* buf
= new char[len
];
585 snprintf(buf
, len
, _("cannot use type %s as type %s"),
586 rhs
->named_type()->message_name().c_str(),
587 lhs
->named_type()->message_name().c_str());
596 // Return true if a value with type RHS may be converted to type LHS.
597 // If REASON is not NULL, set *REASON to the reason the types are not
601 Type::are_convertible(const Type
* lhs
, const Type
* rhs
, std::string
* reason
)
603 // The types are convertible if they are assignable.
604 if (Type::are_assignable(lhs
, rhs
, reason
))
607 // The types are convertible if they have identical underlying
609 if ((lhs
->named_type() != NULL
|| rhs
->named_type() != NULL
)
610 && Type::are_identical(lhs
->base(), rhs
->base(), true, reason
))
613 // The types are convertible if they are both unnamed pointer types
614 // and their pointer base types have identical underlying types.
615 if (lhs
->named_type() == NULL
616 && rhs
->named_type() == NULL
617 && lhs
->points_to() != NULL
618 && rhs
->points_to() != NULL
619 && (lhs
->points_to()->named_type() != NULL
620 || rhs
->points_to()->named_type() != NULL
)
621 && Type::are_identical(lhs
->points_to()->base(),
622 rhs
->points_to()->base(),
627 // Integer and floating point types are convertible to each other.
628 if ((lhs
->integer_type() != NULL
|| lhs
->float_type() != NULL
)
629 && (rhs
->integer_type() != NULL
|| rhs
->float_type() != NULL
))
632 // Complex types are convertible to each other.
633 if (lhs
->complex_type() != NULL
&& rhs
->complex_type() != NULL
)
636 // An integer, or []byte, or []int, may be converted to a string.
637 if (lhs
->is_string_type())
639 if (rhs
->integer_type() != NULL
)
641 if (rhs
->is_open_array_type() && rhs
->named_type() == NULL
)
643 const Type
* e
= rhs
->array_type()->element_type()->forwarded();
644 if (e
->integer_type() != NULL
645 && (e
== Type::lookup_integer_type("uint8")
646 || e
== Type::lookup_integer_type("int")))
651 // A string may be converted to []byte or []int.
652 if (rhs
->is_string_type()
653 && lhs
->is_open_array_type()
654 && lhs
->named_type() == NULL
)
656 const Type
* e
= lhs
->array_type()->element_type()->forwarded();
657 if (e
->integer_type() != NULL
658 && (e
== Type::lookup_integer_type("uint8")
659 || e
== Type::lookup_integer_type("int")))
663 // An unsafe.Pointer type may be converted to any pointer type or to
664 // uintptr, and vice-versa.
665 if (lhs
->is_unsafe_pointer_type()
666 && (rhs
->points_to() != NULL
667 || (rhs
->integer_type() != NULL
668 && rhs
->forwarded() == Type::lookup_integer_type("uintptr"))))
670 if (rhs
->is_unsafe_pointer_type()
671 && (lhs
->points_to() != NULL
672 || (lhs
->integer_type() != NULL
673 && lhs
->forwarded() == Type::lookup_integer_type("uintptr"))))
676 // Give a better error message.
680 *reason
= "invalid type conversion";
683 std::string s
= "invalid type conversion (";
693 // Return whether this type has any hidden fields. This is only a
694 // possibility for a few types.
697 Type::has_hidden_fields(const Named_type
* within
, std::string
* reason
) const
699 switch (this->forwarded()->classification_
)
702 return this->named_type()->named_type_has_hidden_fields(reason
);
704 return this->struct_type()->struct_has_hidden_fields(within
, reason
);
706 return this->array_type()->array_has_hidden_fields(within
, reason
);
712 // Return a hash code for the type to be used for method lookup.
715 Type::hash_for_method(Gogo
* gogo
) const
717 unsigned int ret
= 0;
718 if (this->classification_
!= TYPE_FORWARD
)
719 ret
+= this->classification_
;
720 return ret
+ this->do_hash_for_method(gogo
);
723 // Default implementation of do_hash_for_method. This is appropriate
724 // for types with no subfields.
727 Type::do_hash_for_method(Gogo
*) const
732 // Return a hash code for a string, given a starting hash.
735 Type::hash_string(const std::string
& s
, unsigned int h
)
737 const char* p
= s
.data();
738 size_t len
= s
.length();
739 for (; len
> 0; --len
)
747 // Default check for the expression passed to make. Any type which
748 // may be used with make implements its own version of this.
751 Type::do_check_make_expression(Expression_list
*, source_location
)
756 // Return whether an expression has an integer value. Report an error
757 // if not. This is used when handling calls to the predeclared make
761 Type::check_int_value(Expression
* e
, const char* errmsg
,
762 source_location location
)
764 if (e
->type()->integer_type() != NULL
)
767 // Check for a floating point constant with integer value.
772 if (e
->float_constant_value(fval
, &dummy
))
779 mpfr_clear_overflow();
780 mpfr_clear_erangeflag();
781 mpfr_get_z(ival
, fval
, GMP_RNDN
);
782 if (!mpfr_overflow_p()
783 && !mpfr_erangeflag_p()
784 && mpz_sgn(ival
) >= 0)
786 Named_type
* ntype
= Type::lookup_integer_type("int");
787 Integer_type
* inttype
= ntype
->integer_type();
789 mpz_init_set_ui(max
, 1);
790 mpz_mul_2exp(max
, max
, inttype
->bits() - 1);
791 ok
= mpz_cmp(ival
, max
) < 0;
805 error_at(location
, "%s", errmsg
);
809 // A hash table mapping unnamed types to trees.
811 Type::Type_trees
Type::type_trees
;
813 // Return a tree representing this type.
816 Type::get_tree(Gogo
* gogo
)
818 if (this->tree_
!= NULL
)
821 if (this->forward_declaration_type() != NULL
822 || this->named_type() != NULL
)
823 return this->get_tree_without_hash(gogo
);
825 if (this->is_error_type())
826 return error_mark_node
;
828 // To avoid confusing GIMPLE, we need to translate all identical Go
829 // types to the same GIMPLE type. We use a hash table to do that.
830 // There is no need to use the hash table for named types, as named
831 // types are only identical to themselves.
833 std::pair
<Type
*, tree
> val(this, NULL
);
834 std::pair
<Type_trees::iterator
, bool> ins
=
835 Type::type_trees
.insert(val
);
836 if (!ins
.second
&& ins
.first
->second
!= NULL_TREE
)
838 this->tree_
= ins
.first
->second
;
842 tree t
= this->get_tree_without_hash(gogo
);
844 if (ins
.first
->second
== NULL_TREE
)
845 ins
.first
->second
= t
;
848 // We have already created a tree for this type. This can
849 // happen when an unnamed type is defined using a named type
850 // which in turns uses an identical unnamed type. Use the tree
851 // we created earlier and ignore the one we just built.
852 t
= ins
.first
->second
;
859 // Return a tree for a type without looking in the hash table for
860 // identical types. This is used for named types, since there is no
861 // point to looking in the hash table for them.
864 Type::get_tree_without_hash(Gogo
* gogo
)
866 if (this->tree_
== NULL_TREE
)
868 tree t
= this->do_get_tree(gogo
);
870 // For a recursive function or pointer type, we will temporarily
871 // return ptr_type_node during the recursion. We don't want to
872 // record that for a forwarding type, as it may confuse us
874 if (t
== ptr_type_node
&& this->forward_declaration_type() != NULL
)
878 go_preserve_from_gc(t
);
884 // Return a tree representing a zero initialization for this type.
887 Type::get_init_tree(Gogo
* gogo
, bool is_clear
)
889 tree type_tree
= this->get_tree(gogo
);
890 if (type_tree
== error_mark_node
)
891 return error_mark_node
;
892 return this->do_get_init_tree(gogo
, type_tree
, is_clear
);
895 // Any type which supports the builtin make function must implement
899 Type::do_make_expression_tree(Translate_context
*, Expression_list
*,
905 // Return a pointer to the type descriptor for this type.
908 Type::type_descriptor_pointer(Gogo
* gogo
)
910 Type
* t
= this->forwarded();
911 if (t
->type_descriptor_decl_
== NULL_TREE
)
913 Expression
* e
= t
->do_type_descriptor(gogo
, NULL
);
914 gogo
->build_type_descriptor_decl(t
, e
, &t
->type_descriptor_decl_
);
915 gcc_assert(t
->type_descriptor_decl_
!= NULL_TREE
916 && (t
->type_descriptor_decl_
== error_mark_node
917 || DECL_P(t
->type_descriptor_decl_
)));
919 if (t
->type_descriptor_decl_
== error_mark_node
)
920 return error_mark_node
;
921 return build_fold_addr_expr(t
->type_descriptor_decl_
);
924 // Return a composite literal for a type descriptor.
927 Type::type_descriptor(Gogo
* gogo
, Type
* type
)
929 return type
->do_type_descriptor(gogo
, NULL
);
932 // Return a composite literal for a type descriptor with a name.
935 Type::named_type_descriptor(Gogo
* gogo
, Type
* type
, Named_type
* name
)
937 gcc_assert(name
!= NULL
&& type
->named_type() != name
);
938 return type
->do_type_descriptor(gogo
, name
);
941 // Make a builtin struct type from a list of fields. The fields are
942 // pairs of a name and a type.
945 Type::make_builtin_struct_type(int nfields
, ...)
948 va_start(ap
, nfields
);
950 source_location bloc
= BUILTINS_LOCATION
;
951 Struct_field_list
* sfl
= new Struct_field_list();
952 for (int i
= 0; i
< nfields
; i
++)
954 const char* field_name
= va_arg(ap
, const char *);
955 Type
* type
= va_arg(ap
, Type
*);
956 sfl
->push_back(Struct_field(Typed_identifier(field_name
, type
, bloc
)));
961 return Type::make_struct_type(sfl
, bloc
);
964 // Make a builtin named type.
967 Type::make_builtin_named_type(const char* name
, Type
* type
)
969 source_location bloc
= BUILTINS_LOCATION
;
970 Named_object
* no
= Named_object::make_type(name
, NULL
, type
, bloc
);
971 return no
->type_value();
974 // Return the type of a type descriptor. We should really tie this to
975 // runtime.Type rather than copying it. This must match commonType in
976 // libgo/go/runtime/type.go.
979 Type::make_type_descriptor_type()
984 source_location bloc
= BUILTINS_LOCATION
;
986 Type
* uint8_type
= Type::lookup_integer_type("uint8");
987 Type
* uint32_type
= Type::lookup_integer_type("uint32");
988 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
989 Type
* string_type
= Type::lookup_string_type();
990 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
992 // This is an unnamed version of unsafe.Pointer. Perhaps we
993 // should use the named version instead, although that would
994 // require us to create the unsafe package if it has not been
995 // imported. It probably doesn't matter.
996 Type
* void_type
= Type::make_void_type();
997 Type
* unsafe_pointer_type
= Type::make_pointer_type(void_type
);
999 // Forward declaration for the type descriptor type.
1000 Named_object
* named_type_descriptor_type
=
1001 Named_object::make_type_declaration("commonType", NULL
, bloc
);
1002 Type
* ft
= Type::make_forward_declaration(named_type_descriptor_type
);
1003 Type
* pointer_type_descriptor_type
= Type::make_pointer_type(ft
);
1005 // The type of a method on a concrete type.
1006 Struct_type
* method_type
=
1007 Type::make_builtin_struct_type(5,
1008 "name", pointer_string_type
,
1009 "pkgPath", pointer_string_type
,
1010 "mtyp", pointer_type_descriptor_type
,
1011 "typ", pointer_type_descriptor_type
,
1012 "tfn", unsafe_pointer_type
);
1013 Named_type
* named_method_type
=
1014 Type::make_builtin_named_type("method", method_type
);
1016 // Information for types with a name or methods.
1017 Type
* slice_named_method_type
=
1018 Type::make_array_type(named_method_type
, NULL
);
1019 Struct_type
* uncommon_type
=
1020 Type::make_builtin_struct_type(3,
1021 "name", pointer_string_type
,
1022 "pkgPath", pointer_string_type
,
1023 "methods", slice_named_method_type
);
1024 Named_type
* named_uncommon_type
=
1025 Type::make_builtin_named_type("uncommonType", uncommon_type
);
1027 Type
* pointer_uncommon_type
=
1028 Type::make_pointer_type(named_uncommon_type
);
1030 // The type descriptor type.
1032 Typed_identifier_list
* params
= new Typed_identifier_list();
1033 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1034 params
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1036 Typed_identifier_list
* results
= new Typed_identifier_list();
1037 results
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1039 Type
* hashfn_type
= Type::make_function_type(NULL
, params
, results
, bloc
);
1041 params
= new Typed_identifier_list();
1042 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1043 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1044 params
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1046 results
= new Typed_identifier_list();
1047 results
->push_back(Typed_identifier("", Type::lookup_bool_type(), bloc
));
1049 Type
* equalfn_type
= Type::make_function_type(NULL
, params
, results
,
1052 Struct_type
* type_descriptor_type
=
1053 Type::make_builtin_struct_type(9,
1055 "align", uint8_type
,
1056 "fieldAlign", uint8_type
,
1057 "size", uintptr_type
,
1058 "hash", uint32_type
,
1059 "hashfn", hashfn_type
,
1060 "equalfn", equalfn_type
,
1061 "string", pointer_string_type
,
1062 "", pointer_uncommon_type
);
1064 Named_type
* named
= Type::make_builtin_named_type("commonType",
1065 type_descriptor_type
);
1067 named_type_descriptor_type
->set_type_value(named
);
1075 // Make the type of a pointer to a type descriptor as represented in
1079 Type::make_type_descriptor_ptr_type()
1083 ret
= Type::make_pointer_type(Type::make_type_descriptor_type());
1087 // Return the names of runtime functions which compute a hash code for
1088 // this type and which compare whether two values of this type are
1092 Type::type_functions(const char** hash_fn
, const char** equal_fn
) const
1094 switch (this->base()->classification())
1096 case Type::TYPE_ERROR
:
1097 case Type::TYPE_VOID
:
1098 case Type::TYPE_NIL
:
1099 // These types can not be hashed or compared.
1100 *hash_fn
= "__go_type_hash_error";
1101 *equal_fn
= "__go_type_equal_error";
1104 case Type::TYPE_BOOLEAN
:
1105 case Type::TYPE_INTEGER
:
1106 case Type::TYPE_FLOAT
:
1107 case Type::TYPE_COMPLEX
:
1108 case Type::TYPE_POINTER
:
1109 case Type::TYPE_FUNCTION
:
1110 case Type::TYPE_MAP
:
1111 case Type::TYPE_CHANNEL
:
1112 *hash_fn
= "__go_type_hash_identity";
1113 *equal_fn
= "__go_type_equal_identity";
1116 case Type::TYPE_STRING
:
1117 *hash_fn
= "__go_type_hash_string";
1118 *equal_fn
= "__go_type_equal_string";
1121 case Type::TYPE_STRUCT
:
1122 case Type::TYPE_ARRAY
:
1123 // These types can not be hashed or compared.
1124 *hash_fn
= "__go_type_hash_error";
1125 *equal_fn
= "__go_type_equal_error";
1128 case Type::TYPE_INTERFACE
:
1129 if (this->interface_type()->is_empty())
1131 *hash_fn
= "__go_type_hash_empty_interface";
1132 *equal_fn
= "__go_type_equal_empty_interface";
1136 *hash_fn
= "__go_type_hash_interface";
1137 *equal_fn
= "__go_type_equal_interface";
1141 case Type::TYPE_NAMED
:
1142 case Type::TYPE_FORWARD
:
1150 // Return a composite literal for the type descriptor for a plain type
1151 // of kind RUNTIME_TYPE_KIND named NAME.
1154 Type::type_descriptor_constructor(Gogo
* gogo
, int runtime_type_kind
,
1155 Named_type
* name
, const Methods
* methods
,
1156 bool only_value_methods
)
1158 source_location bloc
= BUILTINS_LOCATION
;
1160 Type
* td_type
= Type::make_type_descriptor_type();
1161 const Struct_field_list
* fields
= td_type
->struct_type()->fields();
1163 Expression_list
* vals
= new Expression_list();
1166 Struct_field_list::const_iterator p
= fields
->begin();
1167 gcc_assert(p
->field_name() == "Kind");
1169 mpz_init_set_ui(iv
, runtime_type_kind
);
1170 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
1173 gcc_assert(p
->field_name() == "align");
1174 Expression::Type_info type_info
= Expression::TYPE_INFO_ALIGNMENT
;
1175 vals
->push_back(Expression::make_type_info(this, type_info
));
1178 gcc_assert(p
->field_name() == "fieldAlign");
1179 type_info
= Expression::TYPE_INFO_FIELD_ALIGNMENT
;
1180 vals
->push_back(Expression::make_type_info(this, type_info
));
1183 gcc_assert(p
->field_name() == "size");
1184 type_info
= Expression::TYPE_INFO_SIZE
;
1185 vals
->push_back(Expression::make_type_info(this, type_info
));
1188 gcc_assert(p
->field_name() == "hash");
1189 mpz_set_ui(iv
, this->hash_for_method(gogo
));
1190 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
1192 const char* hash_fn
;
1193 const char* equal_fn
;
1194 this->type_functions(&hash_fn
, &equal_fn
);
1197 gcc_assert(p
->field_name() == "hashfn");
1198 Function_type
* fntype
= p
->type()->function_type();
1199 Named_object
* no
= Named_object::make_function_declaration(hash_fn
, NULL
,
1202 no
->func_declaration_value()->set_asm_name(hash_fn
);
1203 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1206 gcc_assert(p
->field_name() == "equalfn");
1207 fntype
= p
->type()->function_type();
1208 no
= Named_object::make_function_declaration(equal_fn
, NULL
, fntype
, bloc
);
1209 no
->func_declaration_value()->set_asm_name(equal_fn
);
1210 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1213 gcc_assert(p
->field_name() == "string");
1214 Expression
* s
= Expression::make_string((name
!= NULL
1215 ? name
->reflection(gogo
)
1216 : this->reflection(gogo
)),
1218 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1221 gcc_assert(p
->field_name() == "uncommonType");
1222 if (name
== NULL
&& methods
== NULL
)
1223 vals
->push_back(Expression::make_nil(bloc
));
1226 if (methods
== NULL
)
1227 methods
= name
->methods();
1228 vals
->push_back(this->uncommon_type_constructor(gogo
,
1231 only_value_methods
));
1235 gcc_assert(p
== fields
->end());
1239 return Expression::make_struct_composite_literal(td_type
, vals
, bloc
);
1242 // Return a composite literal for the uncommon type information for
1243 // this type. UNCOMMON_STRUCT_TYPE is the type of the uncommon type
1244 // struct. If name is not NULL, it is the name of the type. If
1245 // METHODS is not NULL, it is the list of methods. ONLY_VALUE_METHODS
1246 // is true if only value methods should be included. At least one of
1247 // NAME and METHODS must not be NULL.
1250 Type::uncommon_type_constructor(Gogo
* gogo
, Type
* uncommon_type
,
1251 Named_type
* name
, const Methods
* methods
,
1252 bool only_value_methods
) const
1254 source_location bloc
= BUILTINS_LOCATION
;
1256 const Struct_field_list
* fields
= uncommon_type
->struct_type()->fields();
1258 Expression_list
* vals
= new Expression_list();
1261 Struct_field_list::const_iterator p
= fields
->begin();
1262 gcc_assert(p
->field_name() == "name");
1265 gcc_assert(p
->field_name() == "pkgPath");
1269 vals
->push_back(Expression::make_nil(bloc
));
1270 vals
->push_back(Expression::make_nil(bloc
));
1274 Named_object
* no
= name
->named_object();
1275 std::string n
= Gogo::unpack_hidden_name(no
->name());
1276 Expression
* s
= Expression::make_string(n
, bloc
);
1277 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1279 if (name
->is_builtin())
1280 vals
->push_back(Expression::make_nil(bloc
));
1283 const Package
* package
= no
->package();
1284 const std::string
& unique_prefix(package
== NULL
1285 ? gogo
->unique_prefix()
1286 : package
->unique_prefix());
1287 const std::string
& package_name(package
== NULL
1288 ? gogo
->package_name()
1290 n
.assign(unique_prefix
);
1292 n
.append(package_name
);
1293 if (name
->in_function() != NULL
)
1296 n
.append(Gogo::unpack_hidden_name(name
->in_function()->name()));
1298 s
= Expression::make_string(n
, bloc
);
1299 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1304 gcc_assert(p
->field_name() == "methods");
1305 vals
->push_back(this->methods_constructor(gogo
, p
->type(), methods
,
1306 only_value_methods
));
1309 gcc_assert(p
== fields
->end());
1311 Expression
* r
= Expression::make_struct_composite_literal(uncommon_type
,
1313 return Expression::make_unary(OPERATOR_AND
, r
, bloc
);
1316 // Sort methods by name.
1322 operator()(const std::pair
<std::string
, const Method
*>& m1
,
1323 const std::pair
<std::string
, const Method
*>& m2
) const
1324 { return m1
.first
< m2
.first
; }
1327 // Return a composite literal for the type method table for this type.
1328 // METHODS_TYPE is the type of the table, and is a slice type.
1329 // METHODS is the list of methods. If ONLY_VALUE_METHODS is true,
1330 // then only value methods are used.
1333 Type::methods_constructor(Gogo
* gogo
, Type
* methods_type
,
1334 const Methods
* methods
,
1335 bool only_value_methods
) const
1337 source_location bloc
= BUILTINS_LOCATION
;
1339 std::vector
<std::pair
<std::string
, const Method
*> > smethods
;
1340 if (methods
!= NULL
)
1342 smethods
.reserve(methods
->count());
1343 for (Methods::const_iterator p
= methods
->begin();
1344 p
!= methods
->end();
1347 if (p
->second
->is_ambiguous())
1349 if (only_value_methods
&& !p
->second
->is_value_method())
1351 smethods
.push_back(std::make_pair(p
->first
, p
->second
));
1355 if (smethods
.empty())
1356 return Expression::make_slice_composite_literal(methods_type
, NULL
, bloc
);
1358 std::sort(smethods
.begin(), smethods
.end(), Sort_methods());
1360 Type
* method_type
= methods_type
->array_type()->element_type();
1362 Expression_list
* vals
= new Expression_list();
1363 vals
->reserve(smethods
.size());
1364 for (std::vector
<std::pair
<std::string
, const Method
*> >::const_iterator p
1366 p
!= smethods
.end();
1368 vals
->push_back(this->method_constructor(gogo
, method_type
, p
->first
,
1371 return Expression::make_slice_composite_literal(methods_type
, vals
, bloc
);
1374 // Return a composite literal for a single method. METHOD_TYPE is the
1375 // type of the entry. METHOD_NAME is the name of the method and M is
1376 // the method information.
1379 Type::method_constructor(Gogo
*, Type
* method_type
,
1380 const std::string
& method_name
,
1381 const Method
* m
) const
1383 source_location bloc
= BUILTINS_LOCATION
;
1385 const Struct_field_list
* fields
= method_type
->struct_type()->fields();
1387 Expression_list
* vals
= new Expression_list();
1390 Struct_field_list::const_iterator p
= fields
->begin();
1391 gcc_assert(p
->field_name() == "name");
1392 const std::string n
= Gogo::unpack_hidden_name(method_name
);
1393 Expression
* s
= Expression::make_string(n
, bloc
);
1394 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1397 gcc_assert(p
->field_name() == "pkgPath");
1398 if (!Gogo::is_hidden_name(method_name
))
1399 vals
->push_back(Expression::make_nil(bloc
));
1402 s
= Expression::make_string(Gogo::hidden_name_prefix(method_name
), bloc
);
1403 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1406 Named_object
* no
= (m
->needs_stub_method()
1408 : m
->named_object());
1410 Function_type
* mtype
;
1411 if (no
->is_function())
1412 mtype
= no
->func_value()->type();
1414 mtype
= no
->func_declaration_value()->type();
1415 gcc_assert(mtype
->is_method());
1416 Type
* nonmethod_type
= mtype
->copy_without_receiver();
1419 gcc_assert(p
->field_name() == "mtyp");
1420 vals
->push_back(Expression::make_type_descriptor(nonmethod_type
, bloc
));
1423 gcc_assert(p
->field_name() == "typ");
1424 vals
->push_back(Expression::make_type_descriptor(mtype
, bloc
));
1427 gcc_assert(p
->field_name() == "tfn");
1428 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1431 gcc_assert(p
== fields
->end());
1433 return Expression::make_struct_composite_literal(method_type
, vals
, bloc
);
1436 // Return a composite literal for the type descriptor of a plain type.
1437 // RUNTIME_TYPE_KIND is the value of the kind field. If NAME is not
1438 // NULL, it is the name to use as well as the list of methods.
1441 Type::plain_type_descriptor(Gogo
* gogo
, int runtime_type_kind
,
1444 return this->type_descriptor_constructor(gogo
, runtime_type_kind
,
1448 // Return the type reflection string for this type.
1451 Type::reflection(Gogo
* gogo
) const
1455 // The do_reflection virtual function should set RET to the
1456 // reflection string.
1457 this->do_reflection(gogo
, &ret
);
1462 // Return a mangled name for the type.
1465 Type::mangled_name(Gogo
* gogo
) const
1469 // The do_mangled_name virtual function should set RET to the
1470 // mangled name. For a composite type it should append a code for
1471 // the composition and then call do_mangled_name on the components.
1472 this->do_mangled_name(gogo
, &ret
);
1477 // Default function to export a type.
1480 Type::do_export(Export
*) const
1488 Type::import_type(Import
* imp
)
1490 if (imp
->match_c_string("("))
1491 return Function_type::do_import(imp
);
1492 else if (imp
->match_c_string("*"))
1493 return Pointer_type::do_import(imp
);
1494 else if (imp
->match_c_string("struct "))
1495 return Struct_type::do_import(imp
);
1496 else if (imp
->match_c_string("["))
1497 return Array_type::do_import(imp
);
1498 else if (imp
->match_c_string("map "))
1499 return Map_type::do_import(imp
);
1500 else if (imp
->match_c_string("chan "))
1501 return Channel_type::do_import(imp
);
1502 else if (imp
->match_c_string("interface"))
1503 return Interface_type::do_import(imp
);
1506 error_at(imp
->location(), "import error: expected type");
1507 return Type::make_error_type();
1511 // A type used to indicate a parsing error. This exists to simplify
1512 // later error detection.
1514 class Error_type
: public Type
1524 { return error_mark_node
; }
1527 do_get_init_tree(Gogo
*, tree
, bool)
1528 { return error_mark_node
; }
1531 do_type_descriptor(Gogo
*, Named_type
*)
1532 { return Expression::make_error(BUILTINS_LOCATION
); }
1535 do_reflection(Gogo
*, std::string
*) const
1536 { gcc_assert(saw_errors()); }
1539 do_mangled_name(Gogo
*, std::string
* ret
) const
1540 { ret
->push_back('E'); }
1544 Type::make_error_type()
1546 static Error_type singleton_error_type
;
1547 return &singleton_error_type
;
1552 class Void_type
: public Type
1562 { return void_type_node
; }
1565 do_get_init_tree(Gogo
*, tree
, bool)
1566 { gcc_unreachable(); }
1569 do_type_descriptor(Gogo
*, Named_type
*)
1570 { gcc_unreachable(); }
1573 do_reflection(Gogo
*, std::string
*) const
1577 do_mangled_name(Gogo
*, std::string
* ret
) const
1578 { ret
->push_back('v'); }
1582 Type::make_void_type()
1584 static Void_type singleton_void_type
;
1585 return &singleton_void_type
;
1588 // The boolean type.
1590 class Boolean_type
: public Type
1594 : Type(TYPE_BOOLEAN
)
1600 { return boolean_type_node
; }
1603 do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1604 { return is_clear
? NULL
: fold_convert(type_tree
, boolean_false_node
); }
1607 do_type_descriptor(Gogo
*, Named_type
* name
);
1609 // We should not be asked for the reflection string of a basic type.
1611 do_reflection(Gogo
*, std::string
* ret
) const
1612 { ret
->append("bool"); }
1615 do_mangled_name(Gogo
*, std::string
* ret
) const
1616 { ret
->push_back('b'); }
1619 // Make the type descriptor.
1622 Boolean_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1625 return this->plain_type_descriptor(gogo
, RUNTIME_TYPE_KIND_BOOL
, name
);
1628 Named_object
* no
= gogo
->lookup_global("bool");
1629 gcc_assert(no
!= NULL
);
1630 return Type::type_descriptor(gogo
, no
->type_value());
1635 Type::make_boolean_type()
1637 static Boolean_type boolean_type
;
1638 return &boolean_type
;
1641 // The named type "bool".
1643 static Named_type
* named_bool_type
;
1645 // Get the named type "bool".
1648 Type::lookup_bool_type()
1650 return named_bool_type
;
1653 // Make the named type "bool".
1656 Type::make_named_bool_type()
1658 Type
* bool_type
= Type::make_boolean_type();
1659 Named_object
* named_object
= Named_object::make_type("bool", NULL
,
1662 Named_type
* named_type
= named_object
->type_value();
1663 named_bool_type
= named_type
;
1667 // Class Integer_type.
1669 Integer_type::Named_integer_types
Integer_type::named_integer_types
;
1671 // Create a new integer type. Non-abstract integer types always have
1675 Integer_type::create_integer_type(const char* name
, bool is_unsigned
,
1676 int bits
, int runtime_type_kind
)
1678 Integer_type
* integer_type
= new Integer_type(false, is_unsigned
, bits
,
1680 std::string
sname(name
);
1681 Named_object
* named_object
= Named_object::make_type(sname
, NULL
,
1684 Named_type
* named_type
= named_object
->type_value();
1685 std::pair
<Named_integer_types::iterator
, bool> ins
=
1686 Integer_type::named_integer_types
.insert(std::make_pair(sname
, named_type
));
1687 gcc_assert(ins
.second
);
1691 // Look up an existing integer type.
1694 Integer_type::lookup_integer_type(const char* name
)
1696 Named_integer_types::const_iterator p
=
1697 Integer_type::named_integer_types
.find(name
);
1698 gcc_assert(p
!= Integer_type::named_integer_types
.end());
1702 // Create a new abstract integer type.
1705 Integer_type::create_abstract_integer_type()
1707 static Integer_type
* abstract_type
;
1708 if (abstract_type
== NULL
)
1709 abstract_type
= new Integer_type(true, false, INT_TYPE_SIZE
,
1710 RUNTIME_TYPE_KIND_INT
);
1711 return abstract_type
;
1714 // Integer type compatibility.
1717 Integer_type::is_identical(const Integer_type
* t
) const
1719 if (this->is_unsigned_
!= t
->is_unsigned_
|| this->bits_
!= t
->bits_
)
1721 return this->is_abstract_
== t
->is_abstract_
;
1727 Integer_type::do_hash_for_method(Gogo
*) const
1729 return ((this->bits_
<< 4)
1730 + ((this->is_unsigned_
? 1 : 0) << 8)
1731 + ((this->is_abstract_
? 1 : 0) << 9));
1734 // Get the tree for an Integer_type.
1737 Integer_type::do_get_tree(Gogo
*)
1739 gcc_assert(!this->is_abstract_
);
1740 if (this->is_unsigned_
)
1742 if (this->bits_
== INT_TYPE_SIZE
)
1743 return unsigned_type_node
;
1744 else if (this->bits_
== CHAR_TYPE_SIZE
)
1745 return unsigned_char_type_node
;
1746 else if (this->bits_
== SHORT_TYPE_SIZE
)
1747 return short_unsigned_type_node
;
1748 else if (this->bits_
== LONG_TYPE_SIZE
)
1749 return long_unsigned_type_node
;
1750 else if (this->bits_
== LONG_LONG_TYPE_SIZE
)
1751 return long_long_unsigned_type_node
;
1753 return make_unsigned_type(this->bits_
);
1757 if (this->bits_
== INT_TYPE_SIZE
)
1758 return integer_type_node
;
1759 else if (this->bits_
== CHAR_TYPE_SIZE
)
1760 return signed_char_type_node
;
1761 else if (this->bits_
== SHORT_TYPE_SIZE
)
1762 return short_integer_type_node
;
1763 else if (this->bits_
== LONG_TYPE_SIZE
)
1764 return long_integer_type_node
;
1765 else if (this->bits_
== LONG_LONG_TYPE_SIZE
)
1766 return long_long_integer_type_node
;
1768 return make_signed_type(this->bits_
);
1773 Integer_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1775 return is_clear
? NULL
: build_int_cst(type_tree
, 0);
1778 // The type descriptor for an integer type. Integer types are always
1782 Integer_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1784 gcc_assert(name
!= NULL
);
1785 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
1788 // We should not be asked for the reflection string of a basic type.
1791 Integer_type::do_reflection(Gogo
*, std::string
*) const
1799 Integer_type::do_mangled_name(Gogo
*, std::string
* ret
) const
1802 snprintf(buf
, sizeof buf
, "i%s%s%de",
1803 this->is_abstract_
? "a" : "",
1804 this->is_unsigned_
? "u" : "",
1809 // Make an integer type.
1812 Type::make_integer_type(const char* name
, bool is_unsigned
, int bits
,
1813 int runtime_type_kind
)
1815 return Integer_type::create_integer_type(name
, is_unsigned
, bits
,
1819 // Make an abstract integer type.
1822 Type::make_abstract_integer_type()
1824 return Integer_type::create_abstract_integer_type();
1827 // Look up an integer type.
1830 Type::lookup_integer_type(const char* name
)
1832 return Integer_type::lookup_integer_type(name
);
1835 // Class Float_type.
1837 Float_type::Named_float_types
Float_type::named_float_types
;
1839 // Create a new float type. Non-abstract float types always have
1843 Float_type::create_float_type(const char* name
, int bits
,
1844 int runtime_type_kind
)
1846 Float_type
* float_type
= new Float_type(false, bits
, runtime_type_kind
);
1847 std::string
sname(name
);
1848 Named_object
* named_object
= Named_object::make_type(sname
, NULL
, float_type
,
1850 Named_type
* named_type
= named_object
->type_value();
1851 std::pair
<Named_float_types::iterator
, bool> ins
=
1852 Float_type::named_float_types
.insert(std::make_pair(sname
, named_type
));
1853 gcc_assert(ins
.second
);
1857 // Look up an existing float type.
1860 Float_type::lookup_float_type(const char* name
)
1862 Named_float_types::const_iterator p
=
1863 Float_type::named_float_types
.find(name
);
1864 gcc_assert(p
!= Float_type::named_float_types
.end());
1868 // Create a new abstract float type.
1871 Float_type::create_abstract_float_type()
1873 static Float_type
* abstract_type
;
1874 if (abstract_type
== NULL
)
1875 abstract_type
= new Float_type(true, FLOAT_TYPE_SIZE
,
1876 RUNTIME_TYPE_KIND_FLOAT
);
1877 return abstract_type
;
1880 // Whether this type is identical with T.
1883 Float_type::is_identical(const Float_type
* t
) const
1885 if (this->bits_
!= t
->bits_
)
1887 return this->is_abstract_
== t
->is_abstract_
;
1893 Float_type::do_hash_for_method(Gogo
*) const
1895 return (this->bits_
<< 4) + ((this->is_abstract_
? 1 : 0) << 8);
1898 // Get a tree without using a Gogo*.
1901 Float_type::type_tree() const
1903 if (this->bits_
== FLOAT_TYPE_SIZE
)
1904 return float_type_node
;
1905 else if (this->bits_
== DOUBLE_TYPE_SIZE
)
1906 return double_type_node
;
1907 else if (this->bits_
== LONG_DOUBLE_TYPE_SIZE
)
1908 return long_double_type_node
;
1911 tree ret
= make_node(REAL_TYPE
);
1912 TYPE_PRECISION(ret
) = this->bits_
;
1921 Float_type::do_get_tree(Gogo
*)
1923 return this->type_tree();
1927 Float_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1932 real_from_integer(&r
, TYPE_MODE(type_tree
), 0, 0, 0);
1933 return build_real(type_tree
, r
);
1936 // The type descriptor for a float type. Float types are always named.
1939 Float_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1941 gcc_assert(name
!= NULL
);
1942 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
1945 // We should not be asked for the reflection string of a basic type.
1948 Float_type::do_reflection(Gogo
*, std::string
*) const
1956 Float_type::do_mangled_name(Gogo
*, std::string
* ret
) const
1959 snprintf(buf
, sizeof buf
, "f%s%de",
1960 this->is_abstract_
? "a" : "",
1965 // Make a floating point type.
1968 Type::make_float_type(const char* name
, int bits
, int runtime_type_kind
)
1970 return Float_type::create_float_type(name
, bits
, runtime_type_kind
);
1973 // Make an abstract float type.
1976 Type::make_abstract_float_type()
1978 return Float_type::create_abstract_float_type();
1981 // Look up a float type.
1984 Type::lookup_float_type(const char* name
)
1986 return Float_type::lookup_float_type(name
);
1989 // Class Complex_type.
1991 Complex_type::Named_complex_types
Complex_type::named_complex_types
;
1993 // Create a new complex type. Non-abstract complex types always have
1997 Complex_type::create_complex_type(const char* name
, int bits
,
1998 int runtime_type_kind
)
2000 Complex_type
* complex_type
= new Complex_type(false, bits
,
2002 std::string
sname(name
);
2003 Named_object
* named_object
= Named_object::make_type(sname
, NULL
,
2006 Named_type
* named_type
= named_object
->type_value();
2007 std::pair
<Named_complex_types::iterator
, bool> ins
=
2008 Complex_type::named_complex_types
.insert(std::make_pair(sname
,
2010 gcc_assert(ins
.second
);
2014 // Look up an existing complex type.
2017 Complex_type::lookup_complex_type(const char* name
)
2019 Named_complex_types::const_iterator p
=
2020 Complex_type::named_complex_types
.find(name
);
2021 gcc_assert(p
!= Complex_type::named_complex_types
.end());
2025 // Create a new abstract complex type.
2028 Complex_type::create_abstract_complex_type()
2030 static Complex_type
* abstract_type
;
2031 if (abstract_type
== NULL
)
2032 abstract_type
= new Complex_type(true, FLOAT_TYPE_SIZE
* 2,
2033 RUNTIME_TYPE_KIND_FLOAT
);
2034 return abstract_type
;
2037 // Whether this type is identical with T.
2040 Complex_type::is_identical(const Complex_type
*t
) const
2042 if (this->bits_
!= t
->bits_
)
2044 return this->is_abstract_
== t
->is_abstract_
;
2050 Complex_type::do_hash_for_method(Gogo
*) const
2052 return (this->bits_
<< 4) + ((this->is_abstract_
? 1 : 0) << 8);
2055 // Get a tree without using a Gogo*.
2058 Complex_type::type_tree() const
2060 if (this->bits_
== FLOAT_TYPE_SIZE
* 2)
2061 return complex_float_type_node
;
2062 else if (this->bits_
== DOUBLE_TYPE_SIZE
* 2)
2063 return complex_double_type_node
;
2064 else if (this->bits_
== LONG_DOUBLE_TYPE_SIZE
* 2)
2065 return complex_long_double_type_node
;
2068 tree ret
= make_node(REAL_TYPE
);
2069 TYPE_PRECISION(ret
) = this->bits_
/ 2;
2071 return build_complex_type(ret
);
2078 Complex_type::do_get_tree(Gogo
*)
2080 return this->type_tree();
2083 // Zero initializer.
2086 Complex_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2091 real_from_integer(&r
, TYPE_MODE(TREE_TYPE(type_tree
)), 0, 0, 0);
2092 return build_complex(type_tree
, build_real(TREE_TYPE(type_tree
), r
),
2093 build_real(TREE_TYPE(type_tree
), r
));
2096 // The type descriptor for a complex type. Complex types are always
2100 Complex_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2102 gcc_assert(name
!= NULL
);
2103 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
2106 // We should not be asked for the reflection string of a basic type.
2109 Complex_type::do_reflection(Gogo
*, std::string
*) const
2117 Complex_type::do_mangled_name(Gogo
*, std::string
* ret
) const
2120 snprintf(buf
, sizeof buf
, "c%s%de",
2121 this->is_abstract_
? "a" : "",
2126 // Make a complex type.
2129 Type::make_complex_type(const char* name
, int bits
, int runtime_type_kind
)
2131 return Complex_type::create_complex_type(name
, bits
, runtime_type_kind
);
2134 // Make an abstract complex type.
2137 Type::make_abstract_complex_type()
2139 return Complex_type::create_abstract_complex_type();
2142 // Look up a complex type.
2145 Type::lookup_complex_type(const char* name
)
2147 return Complex_type::lookup_complex_type(name
);
2150 // Class String_type.
2152 // Return the tree for String_type. A string is a struct with two
2153 // fields: a pointer to the characters and a length.
2156 String_type::do_get_tree(Gogo
*)
2158 static tree struct_type
;
2159 return Gogo::builtin_struct(&struct_type
, "__go_string", NULL_TREE
, 2,
2161 build_pointer_type(unsigned_char_type_node
),
2166 // Return a tree for the length of STRING.
2169 String_type::length_tree(Gogo
*, tree string
)
2171 tree string_type
= TREE_TYPE(string
);
2172 gcc_assert(TREE_CODE(string_type
) == RECORD_TYPE
);
2173 tree length_field
= DECL_CHAIN(TYPE_FIELDS(string_type
));
2174 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(length_field
)),
2176 return fold_build3(COMPONENT_REF
, integer_type_node
, string
,
2177 length_field
, NULL_TREE
);
2180 // Return a tree for a pointer to the bytes of STRING.
2183 String_type::bytes_tree(Gogo
*, tree string
)
2185 tree string_type
= TREE_TYPE(string
);
2186 gcc_assert(TREE_CODE(string_type
) == RECORD_TYPE
);
2187 tree bytes_field
= TYPE_FIELDS(string_type
);
2188 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(bytes_field
)),
2190 return fold_build3(COMPONENT_REF
, TREE_TYPE(bytes_field
), string
,
2191 bytes_field
, NULL_TREE
);
2194 // We initialize a string to { NULL, 0 }.
2197 String_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2202 gcc_assert(TREE_CODE(type_tree
) == RECORD_TYPE
);
2204 VEC(constructor_elt
, gc
)* init
= VEC_alloc(constructor_elt
, gc
, 2);
2206 for (tree field
= TYPE_FIELDS(type_tree
);
2208 field
= DECL_CHAIN(field
))
2210 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
2212 elt
->value
= fold_convert(TREE_TYPE(field
), size_zero_node
);
2215 tree ret
= build_constructor(type_tree
, init
);
2216 TREE_CONSTANT(ret
) = 1;
2220 // The type descriptor for the string type.
2223 String_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2226 return this->plain_type_descriptor(gogo
, RUNTIME_TYPE_KIND_STRING
, name
);
2229 Named_object
* no
= gogo
->lookup_global("string");
2230 gcc_assert(no
!= NULL
);
2231 return Type::type_descriptor(gogo
, no
->type_value());
2235 // We should not be asked for the reflection string of a basic type.
2238 String_type::do_reflection(Gogo
*, std::string
* ret
) const
2240 ret
->append("string");
2243 // Mangled name of a string type.
2246 String_type::do_mangled_name(Gogo
*, std::string
* ret
) const
2248 ret
->push_back('z');
2251 // Make a string type.
2254 Type::make_string_type()
2256 static String_type string_type
;
2257 return &string_type
;
2260 // The named type "string".
2262 static Named_type
* named_string_type
;
2264 // Get the named type "string".
2267 Type::lookup_string_type()
2269 return named_string_type
;
2272 // Make the named type string.
2275 Type::make_named_string_type()
2277 Type
* string_type
= Type::make_string_type();
2278 Named_object
* named_object
= Named_object::make_type("string", NULL
,
2281 Named_type
* named_type
= named_object
->type_value();
2282 named_string_type
= named_type
;
2286 // The sink type. This is the type of the blank identifier _. Any
2287 // type may be assigned to it.
2289 class Sink_type
: public Type
2299 { gcc_unreachable(); }
2302 do_get_init_tree(Gogo
*, tree
, bool)
2303 { gcc_unreachable(); }
2306 do_type_descriptor(Gogo
*, Named_type
*)
2307 { gcc_unreachable(); }
2310 do_reflection(Gogo
*, std::string
*) const
2311 { gcc_unreachable(); }
2314 do_mangled_name(Gogo
*, std::string
*) const
2315 { gcc_unreachable(); }
2318 // Make the sink type.
2321 Type::make_sink_type()
2323 static Sink_type sink_type
;
2327 // Class Function_type.
2332 Function_type::do_traverse(Traverse
* traverse
)
2334 if (this->receiver_
!= NULL
2335 && Type::traverse(this->receiver_
->type(), traverse
) == TRAVERSE_EXIT
)
2336 return TRAVERSE_EXIT
;
2337 if (this->parameters_
!= NULL
2338 && this->parameters_
->traverse(traverse
) == TRAVERSE_EXIT
)
2339 return TRAVERSE_EXIT
;
2340 if (this->results_
!= NULL
2341 && this->results_
->traverse(traverse
) == TRAVERSE_EXIT
)
2342 return TRAVERSE_EXIT
;
2343 return TRAVERSE_CONTINUE
;
2346 // Returns whether T is a valid redeclaration of this type. If this
2347 // returns false, and REASON is not NULL, *REASON may be set to a
2348 // brief explanation of why it returned false.
2351 Function_type::is_valid_redeclaration(const Function_type
* t
,
2352 std::string
* reason
) const
2354 if (!this->is_identical(t
, false, true, reason
))
2357 // A redeclaration of a function is required to use the same names
2358 // for the receiver and parameters.
2359 if (this->receiver() != NULL
2360 && this->receiver()->name() != t
->receiver()->name()
2361 && this->receiver()->name() != Import::import_marker
2362 && t
->receiver()->name() != Import::import_marker
)
2365 *reason
= "receiver name changed";
2369 const Typed_identifier_list
* parms1
= this->parameters();
2370 const Typed_identifier_list
* parms2
= t
->parameters();
2373 Typed_identifier_list::const_iterator p1
= parms1
->begin();
2374 for (Typed_identifier_list::const_iterator p2
= parms2
->begin();
2375 p2
!= parms2
->end();
2378 if (p1
->name() != p2
->name()
2379 && p1
->name() != Import::import_marker
2380 && p2
->name() != Import::import_marker
)
2383 *reason
= "parameter name changed";
2387 // This is called at parse time, so we may have unknown
2389 Type
* t1
= p1
->type()->forwarded();
2390 Type
* t2
= p2
->type()->forwarded();
2392 && t1
->forward_declaration_type() != NULL
2393 && (t2
->forward_declaration_type() == NULL
2394 || (t1
->forward_declaration_type()->named_object()
2395 != t2
->forward_declaration_type()->named_object())))
2400 const Typed_identifier_list
* results1
= this->results();
2401 const Typed_identifier_list
* results2
= t
->results();
2402 if (results1
!= NULL
)
2404 Typed_identifier_list::const_iterator res1
= results1
->begin();
2405 for (Typed_identifier_list::const_iterator res2
= results2
->begin();
2406 res2
!= results2
->end();
2409 if (res1
->name() != res2
->name()
2410 && res1
->name() != Import::import_marker
2411 && res2
->name() != Import::import_marker
)
2414 *reason
= "result name changed";
2418 // This is called at parse time, so we may have unknown
2420 Type
* t1
= res1
->type()->forwarded();
2421 Type
* t2
= res2
->type()->forwarded();
2423 && t1
->forward_declaration_type() != NULL
2424 && (t2
->forward_declaration_type() == NULL
2425 || (t1
->forward_declaration_type()->named_object()
2426 != t2
->forward_declaration_type()->named_object())))
2434 // Check whether T is the same as this type.
2437 Function_type::is_identical(const Function_type
* t
, bool ignore_receiver
,
2438 bool errors_are_identical
,
2439 std::string
* reason
) const
2441 if (!ignore_receiver
)
2443 const Typed_identifier
* r1
= this->receiver();
2444 const Typed_identifier
* r2
= t
->receiver();
2445 if ((r1
!= NULL
) != (r2
!= NULL
))
2448 *reason
= _("different receiver types");
2453 if (!Type::are_identical(r1
->type(), r2
->type(), errors_are_identical
,
2456 if (reason
!= NULL
&& !reason
->empty())
2457 *reason
= "receiver: " + *reason
;
2463 const Typed_identifier_list
* parms1
= this->parameters();
2464 const Typed_identifier_list
* parms2
= t
->parameters();
2465 if ((parms1
!= NULL
) != (parms2
!= NULL
))
2468 *reason
= _("different number of parameters");
2473 Typed_identifier_list::const_iterator p1
= parms1
->begin();
2474 for (Typed_identifier_list::const_iterator p2
= parms2
->begin();
2475 p2
!= parms2
->end();
2478 if (p1
== parms1
->end())
2481 *reason
= _("different number of parameters");
2485 if (!Type::are_identical(p1
->type(), p2
->type(),
2486 errors_are_identical
, NULL
))
2489 *reason
= _("different parameter types");
2493 if (p1
!= parms1
->end())
2496 *reason
= _("different number of parameters");
2501 if (this->is_varargs() != t
->is_varargs())
2504 *reason
= _("different varargs");
2508 const Typed_identifier_list
* results1
= this->results();
2509 const Typed_identifier_list
* results2
= t
->results();
2510 if ((results1
!= NULL
) != (results2
!= NULL
))
2513 *reason
= _("different number of results");
2516 if (results1
!= NULL
)
2518 Typed_identifier_list::const_iterator res1
= results1
->begin();
2519 for (Typed_identifier_list::const_iterator res2
= results2
->begin();
2520 res2
!= results2
->end();
2523 if (res1
== results1
->end())
2526 *reason
= _("different number of results");
2530 if (!Type::are_identical(res1
->type(), res2
->type(),
2531 errors_are_identical
, NULL
))
2534 *reason
= _("different result types");
2538 if (res1
!= results1
->end())
2541 *reason
= _("different number of results");
2552 Function_type::do_hash_for_method(Gogo
* gogo
) const
2554 unsigned int ret
= 0;
2555 // We ignore the receiver type for hash codes, because we need to
2556 // get the same hash code for a method in an interface and a method
2557 // declared for a type. The former will not have a receiver.
2558 if (this->parameters_
!= NULL
)
2561 for (Typed_identifier_list::const_iterator p
= this->parameters_
->begin();
2562 p
!= this->parameters_
->end();
2564 ret
+= p
->type()->hash_for_method(gogo
) << shift
;
2566 if (this->results_
!= NULL
)
2569 for (Typed_identifier_list::const_iterator p
= this->results_
->begin();
2570 p
!= this->results_
->end();
2572 ret
+= p
->type()->hash_for_method(gogo
) << shift
;
2574 if (this->is_varargs_
)
2580 // Get the tree for a function type.
2583 Function_type::do_get_tree(Gogo
* gogo
)
2585 tree args
= NULL_TREE
;
2588 if (this->receiver_
!= NULL
)
2590 Type
* rtype
= this->receiver_
->type();
2591 tree ptype
= rtype
->get_tree(gogo
);
2592 if (ptype
== error_mark_node
)
2593 return error_mark_node
;
2595 // We always pass the address of the receiver parameter, in
2596 // order to make interface calls work with unknown types.
2597 if (rtype
->points_to() == NULL
)
2598 ptype
= build_pointer_type(ptype
);
2600 *pp
= tree_cons (NULL_TREE
, ptype
, NULL_TREE
);
2601 pp
= &TREE_CHAIN (*pp
);
2604 if (this->parameters_
!= NULL
)
2606 for (Typed_identifier_list::const_iterator p
= this->parameters_
->begin();
2607 p
!= this->parameters_
->end();
2610 tree ptype
= p
->type()->get_tree(gogo
);
2611 if (ptype
== error_mark_node
)
2612 return error_mark_node
;
2613 *pp
= tree_cons (NULL_TREE
, ptype
, NULL_TREE
);
2614 pp
= &TREE_CHAIN (*pp
);
2618 // Varargs is handled entirely at the Go level. At the tree level,
2619 // functions are not varargs.
2620 *pp
= void_list_node
;
2623 if (this->results_
== NULL
)
2624 result
= void_type_node
;
2625 else if (this->results_
->size() == 1)
2626 result
= this->results_
->begin()->type()->get_tree(gogo
);
2629 result
= make_node(RECORD_TYPE
);
2630 tree field_trees
= NULL_TREE
;
2631 tree
* pp
= &field_trees
;
2632 for (Typed_identifier_list::const_iterator p
= this->results_
->begin();
2633 p
!= this->results_
->end();
2636 const std::string name
= (p
->name().empty()
2638 : Gogo::unpack_hidden_name(p
->name()));
2639 tree name_tree
= get_identifier_with_length(name
.data(),
2641 tree field_type_tree
= p
->type()->get_tree(gogo
);
2642 if (field_type_tree
== error_mark_node
)
2643 return error_mark_node
;
2644 tree field
= build_decl(this->location_
, FIELD_DECL
, name_tree
,
2646 DECL_CONTEXT(field
) = result
;
2648 pp
= &DECL_CHAIN(field
);
2650 TYPE_FIELDS(result
) = field_trees
;
2651 layout_type(result
);
2654 if (result
== error_mark_node
)
2655 return error_mark_node
;
2657 tree fntype
= build_function_type(result
, args
);
2658 if (fntype
== error_mark_node
)
2661 return build_pointer_type(fntype
);
2664 // Functions are initialized to NULL.
2667 Function_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2671 return fold_convert(type_tree
, null_pointer_node
);
2674 // The type of a function type descriptor.
2677 Function_type::make_function_type_descriptor_type()
2682 Type
* tdt
= Type::make_type_descriptor_type();
2683 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
2685 Type
* bool_type
= Type::lookup_bool_type();
2687 Type
* slice_type
= Type::make_array_type(ptdt
, NULL
);
2689 Struct_type
* s
= Type::make_builtin_struct_type(4,
2691 "dotdotdot", bool_type
,
2695 ret
= Type::make_builtin_named_type("FuncType", s
);
2701 // The type descriptor for a function type.
2704 Function_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2706 source_location bloc
= BUILTINS_LOCATION
;
2708 Type
* ftdt
= Function_type::make_function_type_descriptor_type();
2710 const Struct_field_list
* fields
= ftdt
->struct_type()->fields();
2712 Expression_list
* vals
= new Expression_list();
2715 Struct_field_list::const_iterator p
= fields
->begin();
2716 gcc_assert(p
->field_name() == "commonType");
2717 vals
->push_back(this->type_descriptor_constructor(gogo
,
2718 RUNTIME_TYPE_KIND_FUNC
,
2722 gcc_assert(p
->field_name() == "dotdotdot");
2723 vals
->push_back(Expression::make_boolean(this->is_varargs(), bloc
));
2726 gcc_assert(p
->field_name() == "in");
2727 vals
->push_back(this->type_descriptor_params(p
->type(), this->receiver(),
2728 this->parameters()));
2731 gcc_assert(p
->field_name() == "out");
2732 vals
->push_back(this->type_descriptor_params(p
->type(), NULL
,
2736 gcc_assert(p
== fields
->end());
2738 return Expression::make_struct_composite_literal(ftdt
, vals
, bloc
);
2741 // Return a composite literal for the parameters or results of a type
2745 Function_type::type_descriptor_params(Type
* params_type
,
2746 const Typed_identifier
* receiver
,
2747 const Typed_identifier_list
* params
)
2749 source_location bloc
= BUILTINS_LOCATION
;
2751 if (receiver
== NULL
&& params
== NULL
)
2752 return Expression::make_slice_composite_literal(params_type
, NULL
, bloc
);
2754 Expression_list
* vals
= new Expression_list();
2755 vals
->reserve((params
== NULL
? 0 : params
->size())
2756 + (receiver
!= NULL
? 1 : 0));
2758 if (receiver
!= NULL
)
2760 Type
* rtype
= receiver
->type();
2761 // The receiver is always passed as a pointer. FIXME: Is this
2762 // right? Should that fact affect the type descriptor?
2763 if (rtype
->points_to() == NULL
)
2764 rtype
= Type::make_pointer_type(rtype
);
2765 vals
->push_back(Expression::make_type_descriptor(rtype
, bloc
));
2770 for (Typed_identifier_list::const_iterator p
= params
->begin();
2773 vals
->push_back(Expression::make_type_descriptor(p
->type(), bloc
));
2776 return Expression::make_slice_composite_literal(params_type
, vals
, bloc
);
2779 // The reflection string.
2782 Function_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
2784 // FIXME: Turn this off until we straighten out the type of the
2785 // struct field used in a go statement which calls a method.
2786 // gcc_assert(this->receiver_ == NULL);
2788 ret
->append("func");
2790 if (this->receiver_
!= NULL
)
2792 ret
->push_back('(');
2793 this->append_reflection(this->receiver_
->type(), gogo
, ret
);
2794 ret
->push_back(')');
2797 ret
->push_back('(');
2798 const Typed_identifier_list
* params
= this->parameters();
2801 bool is_varargs
= this->is_varargs_
;
2802 for (Typed_identifier_list::const_iterator p
= params
->begin();
2806 if (p
!= params
->begin())
2808 if (!is_varargs
|| p
+ 1 != params
->end())
2809 this->append_reflection(p
->type(), gogo
, ret
);
2813 this->append_reflection(p
->type()->array_type()->element_type(),
2818 ret
->push_back(')');
2820 const Typed_identifier_list
* results
= this->results();
2821 if (results
!= NULL
&& !results
->empty())
2823 if (results
->size() == 1)
2824 ret
->push_back(' ');
2827 for (Typed_identifier_list::const_iterator p
= results
->begin();
2828 p
!= results
->end();
2831 if (p
!= results
->begin())
2833 this->append_reflection(p
->type(), gogo
, ret
);
2835 if (results
->size() > 1)
2836 ret
->push_back(')');
2843 Function_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
2845 ret
->push_back('F');
2847 if (this->receiver_
!= NULL
)
2849 ret
->push_back('m');
2850 this->append_mangled_name(this->receiver_
->type(), gogo
, ret
);
2853 const Typed_identifier_list
* params
= this->parameters();
2856 ret
->push_back('p');
2857 for (Typed_identifier_list::const_iterator p
= params
->begin();
2860 this->append_mangled_name(p
->type(), gogo
, ret
);
2861 if (this->is_varargs_
)
2862 ret
->push_back('V');
2863 ret
->push_back('e');
2866 const Typed_identifier_list
* results
= this->results();
2867 if (results
!= NULL
)
2869 ret
->push_back('r');
2870 for (Typed_identifier_list::const_iterator p
= results
->begin();
2871 p
!= results
->end();
2873 this->append_mangled_name(p
->type(), gogo
, ret
);
2874 ret
->push_back('e');
2877 ret
->push_back('e');
2880 // Export a function type.
2883 Function_type::do_export(Export
* exp
) const
2885 // We don't write out the receiver. The only function types which
2886 // should have a receiver are the ones associated with explicitly
2887 // defined methods. For those the receiver type is written out by
2888 // Function::export_func.
2890 exp
->write_c_string("(");
2892 if (this->parameters_
!= NULL
)
2894 bool is_varargs
= this->is_varargs_
;
2895 for (Typed_identifier_list::const_iterator p
=
2896 this->parameters_
->begin();
2897 p
!= this->parameters_
->end();
2903 exp
->write_c_string(", ");
2904 if (!is_varargs
|| p
+ 1 != this->parameters_
->end())
2905 exp
->write_type(p
->type());
2908 exp
->write_c_string("...");
2909 exp
->write_type(p
->type()->array_type()->element_type());
2913 exp
->write_c_string(")");
2915 const Typed_identifier_list
* results
= this->results_
;
2916 if (results
!= NULL
)
2918 exp
->write_c_string(" ");
2919 if (results
->size() == 1)
2920 exp
->write_type(results
->begin()->type());
2924 exp
->write_c_string("(");
2925 for (Typed_identifier_list::const_iterator p
= results
->begin();
2926 p
!= results
->end();
2932 exp
->write_c_string(", ");
2933 exp
->write_type(p
->type());
2935 exp
->write_c_string(")");
2940 // Import a function type.
2943 Function_type::do_import(Import
* imp
)
2945 imp
->require_c_string("(");
2946 Typed_identifier_list
* parameters
;
2947 bool is_varargs
= false;
2948 if (imp
->peek_char() == ')')
2952 parameters
= new Typed_identifier_list();
2955 if (imp
->match_c_string("..."))
2961 Type
* ptype
= imp
->read_type();
2963 ptype
= Type::make_array_type(ptype
, NULL
);
2964 parameters
->push_back(Typed_identifier(Import::import_marker
,
2965 ptype
, imp
->location()));
2966 if (imp
->peek_char() != ',')
2968 gcc_assert(!is_varargs
);
2969 imp
->require_c_string(", ");
2972 imp
->require_c_string(")");
2974 Typed_identifier_list
* results
;
2975 if (imp
->peek_char() != ' ')
2980 results
= new Typed_identifier_list
;
2981 if (imp
->peek_char() != '(')
2983 Type
* rtype
= imp
->read_type();
2984 results
->push_back(Typed_identifier(Import::import_marker
, rtype
,
2992 Type
* rtype
= imp
->read_type();
2993 results
->push_back(Typed_identifier(Import::import_marker
,
2994 rtype
, imp
->location()));
2995 if (imp
->peek_char() != ',')
2997 imp
->require_c_string(", ");
2999 imp
->require_c_string(")");
3003 Function_type
* ret
= Type::make_function_type(NULL
, parameters
, results
,
3006 ret
->set_is_varargs();
3010 // Make a copy of a function type without a receiver.
3013 Function_type::copy_without_receiver() const
3015 gcc_assert(this->is_method());
3016 Function_type
*ret
= Type::make_function_type(NULL
, this->parameters_
,
3019 if (this->is_varargs())
3020 ret
->set_is_varargs();
3021 if (this->is_builtin())
3022 ret
->set_is_builtin();
3026 // Make a copy of a function type with a receiver.
3029 Function_type::copy_with_receiver(Type
* receiver_type
) const
3031 gcc_assert(!this->is_method());
3032 Typed_identifier
* receiver
= new Typed_identifier("", receiver_type
,
3034 return Type::make_function_type(receiver
, this->parameters_
,
3035 this->results_
, this->location_
);
3038 // Make a function type.
3041 Type::make_function_type(Typed_identifier
* receiver
,
3042 Typed_identifier_list
* parameters
,
3043 Typed_identifier_list
* results
,
3044 source_location location
)
3046 return new Function_type(receiver
, parameters
, results
, location
);
3049 // Class Pointer_type.
3054 Pointer_type::do_traverse(Traverse
* traverse
)
3056 return Type::traverse(this->to_type_
, traverse
);
3062 Pointer_type::do_hash_for_method(Gogo
* gogo
) const
3064 return this->to_type_
->hash_for_method(gogo
) << 4;
3067 // The tree for a pointer type.
3070 Pointer_type::do_get_tree(Gogo
* gogo
)
3072 return build_pointer_type(this->to_type_
->get_tree(gogo
));
3075 // Initialize a pointer type.
3078 Pointer_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
3082 return fold_convert(type_tree
, null_pointer_node
);
3085 // The type of a pointer type descriptor.
3088 Pointer_type::make_pointer_type_descriptor_type()
3093 Type
* tdt
= Type::make_type_descriptor_type();
3094 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
3096 Struct_type
* s
= Type::make_builtin_struct_type(2,
3100 ret
= Type::make_builtin_named_type("PtrType", s
);
3106 // The type descriptor for a pointer type.
3109 Pointer_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
3111 if (this->is_unsafe_pointer_type())
3113 gcc_assert(name
!= NULL
);
3114 return this->plain_type_descriptor(gogo
,
3115 RUNTIME_TYPE_KIND_UNSAFE_POINTER
,
3120 source_location bloc
= BUILTINS_LOCATION
;
3122 const Methods
* methods
;
3123 Type
* deref
= this->points_to();
3124 if (deref
->named_type() != NULL
)
3125 methods
= deref
->named_type()->methods();
3126 else if (deref
->struct_type() != NULL
)
3127 methods
= deref
->struct_type()->methods();
3131 Type
* ptr_tdt
= Pointer_type::make_pointer_type_descriptor_type();
3133 const Struct_field_list
* fields
= ptr_tdt
->struct_type()->fields();
3135 Expression_list
* vals
= new Expression_list();
3138 Struct_field_list::const_iterator p
= fields
->begin();
3139 gcc_assert(p
->field_name() == "commonType");
3140 vals
->push_back(this->type_descriptor_constructor(gogo
,
3141 RUNTIME_TYPE_KIND_PTR
,
3142 name
, methods
, false));
3145 gcc_assert(p
->field_name() == "elem");
3146 vals
->push_back(Expression::make_type_descriptor(deref
, bloc
));
3148 return Expression::make_struct_composite_literal(ptr_tdt
, vals
, bloc
);
3152 // Reflection string.
3155 Pointer_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
3157 ret
->push_back('*');
3158 this->append_reflection(this->to_type_
, gogo
, ret
);
3164 Pointer_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
3166 ret
->push_back('p');
3167 this->append_mangled_name(this->to_type_
, gogo
, ret
);
3173 Pointer_type::do_export(Export
* exp
) const
3175 exp
->write_c_string("*");
3176 if (this->is_unsafe_pointer_type())
3177 exp
->write_c_string("any");
3179 exp
->write_type(this->to_type_
);
3185 Pointer_type::do_import(Import
* imp
)
3187 imp
->require_c_string("*");
3188 if (imp
->match_c_string("any"))
3191 return Type::make_pointer_type(Type::make_void_type());
3193 Type
* to
= imp
->read_type();
3194 return Type::make_pointer_type(to
);
3197 // Make a pointer type.
3200 Type::make_pointer_type(Type
* to_type
)
3202 typedef Unordered_map(Type
*, Pointer_type
*) Hashtable
;
3203 static Hashtable pointer_types
;
3204 Hashtable::const_iterator p
= pointer_types
.find(to_type
);
3205 if (p
!= pointer_types
.end())
3207 Pointer_type
* ret
= new Pointer_type(to_type
);
3208 pointer_types
[to_type
] = ret
;
3212 // The nil type. We use a special type for nil because it is not the
3213 // same as any other type. In C term nil has type void*, but there is
3214 // no such type in Go.
3216 class Nil_type
: public Type
3226 { return ptr_type_node
; }
3229 do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
3230 { return is_clear
? NULL
: fold_convert(type_tree
, null_pointer_node
); }
3233 do_type_descriptor(Gogo
*, Named_type
*)
3234 { gcc_unreachable(); }
3237 do_reflection(Gogo
*, std::string
*) const
3238 { gcc_unreachable(); }
3241 do_mangled_name(Gogo
*, std::string
* ret
) const
3242 { ret
->push_back('n'); }
3245 // Make the nil type.
3248 Type::make_nil_type()
3250 static Nil_type singleton_nil_type
;
3251 return &singleton_nil_type
;
3254 // The type of a function call which returns multiple values. This is
3255 // really a struct, but we don't want to confuse a function call which
3256 // returns a struct with a function call which returns multiple
3259 class Call_multiple_result_type
: public Type
3262 Call_multiple_result_type(Call_expression
* call
)
3263 : Type(TYPE_CALL_MULTIPLE_RESULT
),
3269 do_has_pointer() const
3271 gcc_assert(saw_errors());
3279 do_get_init_tree(Gogo
*, tree
, bool)
3281 gcc_assert(saw_errors());
3282 return error_mark_node
;
3286 do_type_descriptor(Gogo
*, Named_type
*)
3288 gcc_assert(saw_errors());
3289 return Expression::make_error(UNKNOWN_LOCATION
);
3293 do_reflection(Gogo
*, std::string
*) const
3294 { gcc_assert(saw_errors()); }
3297 do_mangled_name(Gogo
*, std::string
*) const
3298 { gcc_assert(saw_errors()); }
3301 // The expression being called.
3302 Call_expression
* call_
;
3305 // Return the tree for a call result.
3308 Call_multiple_result_type::do_get_tree(Gogo
* gogo
)
3310 Function_type
* fntype
= this->call_
->get_function_type();
3311 gcc_assert(fntype
!= NULL
);
3312 const Typed_identifier_list
* results
= fntype
->results();
3313 gcc_assert(results
!= NULL
&& results
->size() > 1);
3315 Struct_field_list
* sfl
= new Struct_field_list
;
3316 for (Typed_identifier_list::const_iterator p
= results
->begin();
3317 p
!= results
->end();
3320 const std::string name
= ((p
->name().empty()
3321 || p
->name() == Import::import_marker
)
3324 sfl
->push_back(Struct_field(Typed_identifier(name
, p
->type(),
3325 this->call_
->location())));
3327 return Type::make_struct_type(sfl
, this->call_
->location())->get_tree(gogo
);
3330 // Make a call result type.
3333 Type::make_call_multiple_result_type(Call_expression
* call
)
3335 return new Call_multiple_result_type(call
);
3338 // Class Struct_field.
3340 // Get the name of a field.
3343 Struct_field::field_name() const
3345 const std::string
& name(this->typed_identifier_
.name());
3350 // This is called during parsing, before anything is lowered, so
3351 // we have to be pretty careful to avoid dereferencing an
3352 // unknown type name.
3353 Type
* t
= this->typed_identifier_
.type();
3355 if (t
->classification() == Type::TYPE_POINTER
)
3358 Pointer_type
* ptype
= static_cast<Pointer_type
*>(t
);
3359 dt
= ptype
->points_to();
3361 if (dt
->forward_declaration_type() != NULL
)
3362 return dt
->forward_declaration_type()->name();
3363 else if (dt
->named_type() != NULL
)
3364 return dt
->named_type()->name();
3365 else if (t
->is_error_type() || dt
->is_error_type())
3367 static const std::string error_string
= "*error*";
3368 return error_string
;
3372 // Avoid crashing in the erroneous case where T is named but
3374 gcc_assert(t
!= dt
);
3375 if (t
->forward_declaration_type() != NULL
)
3376 return t
->forward_declaration_type()->name();
3377 else if (t
->named_type() != NULL
)
3378 return t
->named_type()->name();
3385 // Class Struct_type.
3390 Struct_type::do_traverse(Traverse
* traverse
)
3392 Struct_field_list
* fields
= this->fields_
;
3395 for (Struct_field_list::iterator p
= fields
->begin();
3399 if (Type::traverse(p
->type(), traverse
) == TRAVERSE_EXIT
)
3400 return TRAVERSE_EXIT
;
3403 return TRAVERSE_CONTINUE
;
3406 // Verify that the struct type is complete and valid.
3409 Struct_type::do_verify()
3411 Struct_field_list
* fields
= this->fields_
;
3415 for (Struct_field_list::iterator p
= fields
->begin();
3419 Type
* t
= p
->type();
3420 if (t
->is_undefined())
3422 error_at(p
->location(), "struct field type is incomplete");
3423 p
->set_type(Type::make_error_type());
3426 else if (p
->is_anonymous())
3428 if (t
->named_type() != NULL
&& t
->points_to() != NULL
)
3430 error_at(p
->location(), "embedded type may not be a pointer");
3431 p
->set_type(Type::make_error_type());
3439 // Whether this contains a pointer.
3442 Struct_type::do_has_pointer() const
3444 const Struct_field_list
* fields
= this->fields();
3447 for (Struct_field_list::const_iterator p
= fields
->begin();
3451 if (p
->type()->has_pointer())
3457 // Whether this type is identical to T.
3460 Struct_type::is_identical(const Struct_type
* t
,
3461 bool errors_are_identical
) const
3463 const Struct_field_list
* fields1
= this->fields();
3464 const Struct_field_list
* fields2
= t
->fields();
3465 if (fields1
== NULL
|| fields2
== NULL
)
3466 return fields1
== fields2
;
3467 Struct_field_list::const_iterator pf2
= fields2
->begin();
3468 for (Struct_field_list::const_iterator pf1
= fields1
->begin();
3469 pf1
!= fields1
->end();
3472 if (pf2
== fields2
->end())
3474 if (pf1
->field_name() != pf2
->field_name())
3476 if (pf1
->is_anonymous() != pf2
->is_anonymous()
3477 || !Type::are_identical(pf1
->type(), pf2
->type(),
3478 errors_are_identical
, NULL
))
3480 if (!pf1
->has_tag())
3487 if (!pf2
->has_tag())
3489 if (pf1
->tag() != pf2
->tag())
3493 if (pf2
!= fields2
->end())
3498 // Whether this struct type has any hidden fields.
3501 Struct_type::struct_has_hidden_fields(const Named_type
* within
,
3502 std::string
* reason
) const
3504 const Struct_field_list
* fields
= this->fields();
3507 const Package
* within_package
= (within
== NULL
3509 : within
->named_object()->package());
3510 for (Struct_field_list::const_iterator pf
= fields
->begin();
3511 pf
!= fields
->end();
3514 if (within_package
!= NULL
3515 && !pf
->is_anonymous()
3516 && Gogo::is_hidden_name(pf
->field_name()))
3520 std::string within_name
= within
->named_object()->message_name();
3521 std::string name
= Gogo::message_name(pf
->field_name());
3522 size_t bufsize
= 200 + within_name
.length() + name
.length();
3523 char* buf
= new char[bufsize
];
3524 snprintf(buf
, bufsize
,
3525 _("implicit assignment of %s%s%s hidden field %s%s%s"),
3526 open_quote
, within_name
.c_str(), close_quote
,
3527 open_quote
, name
.c_str(), close_quote
);
3528 reason
->assign(buf
);
3534 if (pf
->type()->has_hidden_fields(within
, reason
))
3544 Struct_type::do_hash_for_method(Gogo
* gogo
) const
3546 unsigned int ret
= 0;
3547 if (this->fields() != NULL
)
3549 for (Struct_field_list::const_iterator pf
= this->fields()->begin();
3550 pf
!= this->fields()->end();
3552 ret
= (ret
<< 1) + pf
->type()->hash_for_method(gogo
);
3557 // Find the local field NAME.
3560 Struct_type::find_local_field(const std::string
& name
,
3561 unsigned int *pindex
) const
3563 const Struct_field_list
* fields
= this->fields_
;
3567 for (Struct_field_list::const_iterator pf
= fields
->begin();
3568 pf
!= fields
->end();
3571 if (pf
->field_name() == name
)
3581 // Return an expression for field NAME in STRUCT_EXPR, or NULL.
3583 Field_reference_expression
*
3584 Struct_type::field_reference(Expression
* struct_expr
, const std::string
& name
,
3585 source_location location
) const
3588 return this->field_reference_depth(struct_expr
, name
, location
, &depth
);
3591 // Return an expression for a field, along with the depth at which it
3594 Field_reference_expression
*
3595 Struct_type::field_reference_depth(Expression
* struct_expr
,
3596 const std::string
& name
,
3597 source_location location
,
3598 unsigned int* depth
) const
3600 const Struct_field_list
* fields
= this->fields_
;
3604 // Look for a field with this name.
3606 for (Struct_field_list::const_iterator pf
= fields
->begin();
3607 pf
!= fields
->end();
3610 if (pf
->field_name() == name
)
3613 return Expression::make_field_reference(struct_expr
, i
, location
);
3617 // Look for an anonymous field which contains a field with this
3619 unsigned int found_depth
= 0;
3620 Field_reference_expression
* ret
= NULL
;
3622 for (Struct_field_list::const_iterator pf
= fields
->begin();
3623 pf
!= fields
->end();
3626 if (!pf
->is_anonymous())
3629 Struct_type
* st
= pf
->type()->deref()->struct_type();
3633 // Look for a reference using a NULL struct expression. If we
3634 // find one, fill in the struct expression with a reference to
3636 unsigned int subdepth
;
3637 Field_reference_expression
* sub
= st
->field_reference_depth(NULL
, name
,
3643 if (ret
== NULL
|| subdepth
< found_depth
)
3648 found_depth
= subdepth
;
3649 Expression
* here
= Expression::make_field_reference(struct_expr
, i
,
3651 if (pf
->type()->points_to() != NULL
)
3652 here
= Expression::make_unary(OPERATOR_MULT
, here
, location
);
3653 while (sub
->expr() != NULL
)
3655 sub
= sub
->expr()->deref()->field_reference_expression();
3656 gcc_assert(sub
!= NULL
);
3658 sub
->set_struct_expression(here
);
3660 else if (subdepth
> found_depth
)
3664 // We do not handle ambiguity here--it should be handled by
3665 // Type::bind_field_or_method.
3673 *depth
= found_depth
+ 1;
3678 // Return the total number of fields, including embedded fields.
3681 Struct_type::total_field_count() const
3683 if (this->fields_
== NULL
)
3685 unsigned int ret
= 0;
3686 for (Struct_field_list::const_iterator pf
= this->fields_
->begin();
3687 pf
!= this->fields_
->end();
3690 if (!pf
->is_anonymous() || pf
->type()->deref()->struct_type() == NULL
)
3693 ret
+= pf
->type()->struct_type()->total_field_count();
3698 // Return whether NAME is an unexported field, for better error reporting.
3701 Struct_type::is_unexported_local_field(Gogo
* gogo
,
3702 const std::string
& name
) const
3704 const Struct_field_list
* fields
= this->fields_
;
3707 for (Struct_field_list::const_iterator pf
= fields
->begin();
3708 pf
!= fields
->end();
3711 const std::string
& field_name(pf
->field_name());
3712 if (Gogo::is_hidden_name(field_name
)
3713 && name
== Gogo::unpack_hidden_name(field_name
)
3714 && gogo
->pack_hidden_name(name
, false) != field_name
)
3721 // Finalize the methods of an unnamed struct.
3724 Struct_type::finalize_methods(Gogo
* gogo
)
3726 if (this->all_methods_
!= NULL
)
3728 Type::finalize_methods(gogo
, this, this->location_
, &this->all_methods_
);
3731 // Return the method NAME, or NULL if there isn't one or if it is
3732 // ambiguous. Set *IS_AMBIGUOUS if the method exists but is
3736 Struct_type::method_function(const std::string
& name
, bool* is_ambiguous
) const
3738 return Type::method_function(this->all_methods_
, name
, is_ambiguous
);
3741 // Get the tree for a struct type.
3744 Struct_type::do_get_tree(Gogo
* gogo
)
3746 tree type
= make_node(RECORD_TYPE
);
3747 return this->fill_in_tree(gogo
, type
);
3750 // Fill in the fields for a struct type.
3753 Struct_type::fill_in_tree(Gogo
* gogo
, tree type
)
3755 tree field_trees
= NULL_TREE
;
3756 tree
* pp
= &field_trees
;
3757 bool has_pointer
= false;
3758 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3759 p
!= this->fields_
->end();
3762 std::string name
= Gogo::unpack_hidden_name(p
->field_name());
3763 tree name_tree
= get_identifier_with_length(name
.data(), name
.length());
3765 // Don't follow pointers yet, so that we don't get confused by a
3766 // pointer to an array of this struct type.
3767 tree field_type_tree
;
3768 if (p
->type()->points_to() != NULL
)
3770 field_type_tree
= ptr_type_node
;
3775 field_type_tree
= p
->type()->get_tree(gogo
);
3776 if (field_type_tree
== error_mark_node
)
3777 return error_mark_node
;
3780 tree field
= build_decl(p
->location(), FIELD_DECL
, name_tree
,
3782 DECL_CONTEXT(field
) = type
;
3784 pp
= &DECL_CHAIN(field
);
3787 TYPE_FIELDS(type
) = field_trees
;
3793 tree field
= field_trees
;
3794 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3795 p
!= this->fields_
->end();
3796 ++p
, field
= DECL_CHAIN(field
))
3798 if (p
->type()->points_to() != NULL
)
3799 TREE_TYPE(field
) = p
->type()->get_tree(gogo
);
3806 // Make sure that all structs which must be converted to the backend
3807 // representation before this one are in fact converted.
3810 Struct_type::convert_prerequisites(Gogo
* gogo
)
3812 for (std::vector
<Named_type
*>::const_iterator p
3813 = this->prerequisites_
.begin();
3814 p
!= this->prerequisites_
.end();
3816 (*p
)->get_tree(gogo
);
3819 // Initialize struct fields.
3822 Struct_type::do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
3824 if (this->fields_
== NULL
|| this->fields_
->empty())
3830 tree ret
= build_constructor(type_tree
,
3831 VEC_alloc(constructor_elt
, gc
, 0));
3832 TREE_CONSTANT(ret
) = 1;
3837 bool is_constant
= true;
3838 bool any_fields_set
= false;
3839 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
,
3840 this->fields_
->size());
3842 tree field
= TYPE_FIELDS(type_tree
);
3843 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3844 p
!= this->fields_
->end();
3845 ++p
, field
= DECL_CHAIN(field
))
3847 tree value
= p
->type()->get_init_tree(gogo
, is_clear
);
3848 if (value
== error_mark_node
)
3849 return error_mark_node
;
3850 gcc_assert(field
!= NULL_TREE
);
3853 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
3856 any_fields_set
= true;
3857 if (!TREE_CONSTANT(value
))
3858 is_constant
= false;
3861 gcc_assert(field
== NULL_TREE
);
3863 if (!any_fields_set
)
3865 gcc_assert(is_clear
);
3866 VEC_free(constructor_elt
, gc
, init
);
3870 tree ret
= build_constructor(type_tree
, init
);
3872 TREE_CONSTANT(ret
) = 1;
3876 // The type of a struct type descriptor.
3879 Struct_type::make_struct_type_descriptor_type()
3884 Type
* tdt
= Type::make_type_descriptor_type();
3885 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
3887 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
3888 Type
* string_type
= Type::lookup_string_type();
3889 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
3892 Type::make_builtin_struct_type(5,
3893 "name", pointer_string_type
,
3894 "pkgPath", pointer_string_type
,
3896 "tag", pointer_string_type
,
3897 "offset", uintptr_type
);
3898 Type
* nsf
= Type::make_builtin_named_type("structField", sf
);
3900 Type
* slice_type
= Type::make_array_type(nsf
, NULL
);
3902 Struct_type
* s
= Type::make_builtin_struct_type(2,
3904 "fields", slice_type
);
3906 ret
= Type::make_builtin_named_type("StructType", s
);
3912 // Build a type descriptor for a struct type.
3915 Struct_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
3917 source_location bloc
= BUILTINS_LOCATION
;
3919 Type
* stdt
= Struct_type::make_struct_type_descriptor_type();
3921 const Struct_field_list
* fields
= stdt
->struct_type()->fields();
3923 Expression_list
* vals
= new Expression_list();
3926 const Methods
* methods
= this->methods();
3927 // A named struct should not have methods--the methods should attach
3928 // to the named type.
3929 gcc_assert(methods
== NULL
|| name
== NULL
);
3931 Struct_field_list::const_iterator ps
= fields
->begin();
3932 gcc_assert(ps
->field_name() == "commonType");
3933 vals
->push_back(this->type_descriptor_constructor(gogo
,
3934 RUNTIME_TYPE_KIND_STRUCT
,
3935 name
, methods
, true));
3938 gcc_assert(ps
->field_name() == "fields");
3940 Expression_list
* elements
= new Expression_list();
3941 elements
->reserve(this->fields_
->size());
3942 Type
* element_type
= ps
->type()->array_type()->element_type();
3943 for (Struct_field_list::const_iterator pf
= this->fields_
->begin();
3944 pf
!= this->fields_
->end();
3947 const Struct_field_list
* f
= element_type
->struct_type()->fields();
3949 Expression_list
* fvals
= new Expression_list();
3952 Struct_field_list::const_iterator q
= f
->begin();
3953 gcc_assert(q
->field_name() == "name");
3954 if (pf
->is_anonymous())
3955 fvals
->push_back(Expression::make_nil(bloc
));
3958 std::string n
= Gogo::unpack_hidden_name(pf
->field_name());
3959 Expression
* s
= Expression::make_string(n
, bloc
);
3960 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3964 gcc_assert(q
->field_name() == "pkgPath");
3965 if (!Gogo::is_hidden_name(pf
->field_name()))
3966 fvals
->push_back(Expression::make_nil(bloc
));
3969 std::string n
= Gogo::hidden_name_prefix(pf
->field_name());
3970 Expression
* s
= Expression::make_string(n
, bloc
);
3971 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3975 gcc_assert(q
->field_name() == "typ");
3976 fvals
->push_back(Expression::make_type_descriptor(pf
->type(), bloc
));
3979 gcc_assert(q
->field_name() == "tag");
3981 fvals
->push_back(Expression::make_nil(bloc
));
3984 Expression
* s
= Expression::make_string(pf
->tag(), bloc
);
3985 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3989 gcc_assert(q
->field_name() == "offset");
3990 fvals
->push_back(Expression::make_struct_field_offset(this, &*pf
));
3992 Expression
* v
= Expression::make_struct_composite_literal(element_type
,
3994 elements
->push_back(v
);
3997 vals
->push_back(Expression::make_slice_composite_literal(ps
->type(),
4000 return Expression::make_struct_composite_literal(stdt
, vals
, bloc
);
4003 // Reflection string.
4006 Struct_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
4008 ret
->append("struct { ");
4010 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
4011 p
!= this->fields_
->end();
4014 if (p
!= this->fields_
->begin())
4016 if (p
->is_anonymous())
4017 ret
->push_back('?');
4019 ret
->append(Gogo::unpack_hidden_name(p
->field_name()));
4020 ret
->push_back(' ');
4021 this->append_reflection(p
->type(), gogo
, ret
);
4025 const std::string
& tag(p
->tag());
4027 for (std::string::const_iterator p
= tag
.begin();
4032 ret
->append("\\x00");
4033 else if (*p
== '\n')
4035 else if (*p
== '\t')
4038 ret
->append("\\\"");
4039 else if (*p
== '\\')
4040 ret
->append("\\\\");
4044 ret
->push_back('"');
4054 Struct_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
4056 ret
->push_back('S');
4058 const Struct_field_list
* fields
= this->fields_
;
4061 for (Struct_field_list::const_iterator p
= fields
->begin();
4065 if (p
->is_anonymous())
4069 std::string n
= Gogo::unpack_hidden_name(p
->field_name());
4071 snprintf(buf
, sizeof buf
, "%u_",
4072 static_cast<unsigned int>(n
.length()));
4076 this->append_mangled_name(p
->type(), gogo
, ret
);
4079 const std::string
& tag(p
->tag());
4081 for (std::string::const_iterator p
= tag
.begin();
4085 if (ISALNUM(*p
) || *p
== '_')
4090 snprintf(buf
, sizeof buf
, ".%x.",
4091 static_cast<unsigned int>(*p
));
4096 snprintf(buf
, sizeof buf
, "T%u_",
4097 static_cast<unsigned int>(out
.length()));
4104 ret
->push_back('e');
4110 Struct_type::do_export(Export
* exp
) const
4112 exp
->write_c_string("struct { ");
4113 const Struct_field_list
* fields
= this->fields_
;
4114 gcc_assert(fields
!= NULL
);
4115 for (Struct_field_list::const_iterator p
= fields
->begin();
4119 if (p
->is_anonymous())
4120 exp
->write_string("? ");
4123 exp
->write_string(p
->field_name());
4124 exp
->write_c_string(" ");
4126 exp
->write_type(p
->type());
4130 exp
->write_c_string(" ");
4131 Expression
* expr
= Expression::make_string(p
->tag(),
4133 expr
->export_expression(exp
);
4137 exp
->write_c_string("; ");
4139 exp
->write_c_string("}");
4145 Struct_type::do_import(Import
* imp
)
4147 imp
->require_c_string("struct { ");
4148 Struct_field_list
* fields
= new Struct_field_list
;
4149 if (imp
->peek_char() != '}')
4154 if (imp
->match_c_string("? "))
4158 name
= imp
->read_identifier();
4159 imp
->require_c_string(" ");
4161 Type
* ftype
= imp
->read_type();
4163 Struct_field
sf(Typed_identifier(name
, ftype
, imp
->location()));
4165 if (imp
->peek_char() == ' ')
4168 Expression
* expr
= Expression::import_expression(imp
);
4169 String_expression
* sexpr
= expr
->string_expression();
4170 gcc_assert(sexpr
!= NULL
);
4171 sf
.set_tag(sexpr
->val());
4175 imp
->require_c_string("; ");
4176 fields
->push_back(sf
);
4177 if (imp
->peek_char() == '}')
4181 imp
->require_c_string("}");
4183 return Type::make_struct_type(fields
, imp
->location());
4186 // Make a struct type.
4189 Type::make_struct_type(Struct_field_list
* fields
,
4190 source_location location
)
4192 return new Struct_type(fields
, location
);
4195 // Class Array_type.
4197 // Whether two array types are identical.
4200 Array_type::is_identical(const Array_type
* t
, bool errors_are_identical
) const
4202 if (!Type::are_identical(this->element_type(), t
->element_type(),
4203 errors_are_identical
, NULL
))
4206 Expression
* l1
= this->length();
4207 Expression
* l2
= t
->length();
4209 // Slices of the same element type are identical.
4210 if (l1
== NULL
&& l2
== NULL
)
4213 // Arrays of the same element type are identical if they have the
4215 if (l1
!= NULL
&& l2
!= NULL
)
4220 // Try to determine the lengths. If we can't, assume the arrays
4221 // are not identical.
4229 if (l1
->integer_constant_value(true, v1
, &type1
)
4230 && l2
->integer_constant_value(true, v2
, &type2
))
4231 ret
= mpz_cmp(v1
, v2
) == 0;
4237 // Otherwise the arrays are not identical.
4244 Array_type::do_traverse(Traverse
* traverse
)
4246 if (Type::traverse(this->element_type_
, traverse
) == TRAVERSE_EXIT
)
4247 return TRAVERSE_EXIT
;
4248 if (this->length_
!= NULL
4249 && Expression::traverse(&this->length_
, traverse
) == TRAVERSE_EXIT
)
4250 return TRAVERSE_EXIT
;
4251 return TRAVERSE_CONTINUE
;
4254 // Check that the length is valid.
4257 Array_type::verify_length()
4259 if (this->length_
== NULL
)
4261 if (!this->length_
->is_constant())
4263 error_at(this->length_
->location(), "array bound is not constant");
4269 Type
* t
= this->length_
->type();
4270 if (t
->integer_type() != NULL
)
4274 if (!this->length_
->integer_constant_value(true, val
, &vt
))
4276 error_at(this->length_
->location(),
4277 "array bound is not constant");
4282 else if (t
->float_type() != NULL
)
4287 if (!this->length_
->float_constant_value(fval
, &vt
))
4289 error_at(this->length_
->location(),
4290 "array bound is not constant");
4294 if (!mpfr_integer_p(fval
))
4296 error_at(this->length_
->location(),
4297 "array bound truncated to integer");
4302 mpfr_get_z(val
, fval
, GMP_RNDN
);
4307 if (!t
->is_error_type())
4308 error_at(this->length_
->location(), "array bound is not numeric");
4312 if (mpz_sgn(val
) < 0)
4314 error_at(this->length_
->location(), "negative array bound");
4319 Type
* int_type
= Type::lookup_integer_type("int");
4320 int tbits
= int_type
->integer_type()->bits();
4321 int vbits
= mpz_sizeinbase(val
, 2);
4322 if (vbits
+ 1 > tbits
)
4324 error_at(this->length_
->location(), "array bound overflows");
4337 Array_type::do_verify()
4339 if (!this->verify_length())
4341 this->length_
= Expression::make_error(this->length_
->location());
4347 // Array type hash code.
4350 Array_type::do_hash_for_method(Gogo
* gogo
) const
4352 // There is no very convenient way to get a hash code for the
4354 return this->element_type_
->hash_for_method(gogo
) + 1;
4357 // See if the expression passed to make is suitable. The first
4358 // argument is required, and gives the length. An optional second
4359 // argument is permitted for the capacity.
4362 Array_type::do_check_make_expression(Expression_list
* args
,
4363 source_location location
)
4365 gcc_assert(this->length_
== NULL
);
4366 if (args
== NULL
|| args
->empty())
4368 error_at(location
, "length required when allocating a slice");
4371 else if (args
->size() > 2)
4373 error_at(location
, "too many expressions passed to make");
4378 if (!Type::check_int_value(args
->front(),
4379 _("bad length when making slice"), location
))
4382 if (args
->size() > 1)
4384 if (!Type::check_int_value(args
->back(),
4385 _("bad capacity when making slice"),
4394 // Get a tree for the length of a fixed array. The length may be
4395 // computed using a function call, so we must only evaluate it once.
4398 Array_type::get_length_tree(Gogo
* gogo
)
4400 gcc_assert(this->length_
!= NULL
);
4401 if (this->length_tree_
== NULL_TREE
)
4406 if (this->length_
->integer_constant_value(true, val
, &t
))
4409 t
= Type::lookup_integer_type("int");
4410 else if (t
->is_abstract())
4411 t
= t
->make_non_abstract_type();
4412 tree tt
= t
->get_tree(gogo
);
4413 this->length_tree_
= Expression::integer_constant_tree(val
, tt
);
4420 // Make up a translation context for the array length
4421 // expression. FIXME: This won't work in general.
4422 Translate_context
context(gogo
, NULL
, NULL
, NULL_TREE
);
4423 tree len
= this->length_
->get_tree(&context
);
4424 if (len
!= error_mark_node
)
4426 len
= convert_to_integer(integer_type_node
, len
);
4427 len
= save_expr(len
);
4429 this->length_tree_
= len
;
4432 return this->length_tree_
;
4435 // Get a tree for the type of this array. A fixed array is simply
4436 // represented as ARRAY_TYPE with the appropriate index--i.e., it is
4437 // just like an array in C. An open array is a struct with three
4438 // fields: a data pointer, the length, and the capacity.
4441 Array_type::do_get_tree(Gogo
* gogo
)
4443 if (this->length_
== NULL
)
4445 tree struct_type
= gogo
->slice_type_tree(void_type_node
);
4446 return this->fill_in_tree(gogo
, struct_type
);
4450 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4451 tree length_tree
= this->get_length_tree(gogo
);
4452 if (element_type_tree
== error_mark_node
4453 || length_tree
== error_mark_node
)
4454 return error_mark_node
;
4456 length_tree
= fold_convert(sizetype
, length_tree
);
4458 // build_index_type takes the maximum index, which is one less
4460 tree index_type
= build_index_type(fold_build2(MINUS_EXPR
, sizetype
,
4464 return build_array_type(element_type_tree
, index_type
);
4468 // Fill in the fields for a slice type. This is used for named slice
4472 Array_type::fill_in_tree(Gogo
* gogo
, tree struct_type
)
4474 gcc_assert(this->length_
== NULL
);
4476 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4477 tree field
= TYPE_FIELDS(struct_type
);
4478 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__values") == 0);
4479 gcc_assert(POINTER_TYPE_P(TREE_TYPE(field
))
4480 && TREE_TYPE(TREE_TYPE(field
)) == void_type_node
);
4481 TREE_TYPE(field
) = build_pointer_type(element_type_tree
);
4486 // Return an initializer for an array type.
4489 Array_type::do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
4491 if (this->length_
== NULL
)
4498 gcc_assert(TREE_CODE(type_tree
) == RECORD_TYPE
);
4500 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
, 3);
4502 for (tree field
= TYPE_FIELDS(type_tree
);
4504 field
= DECL_CHAIN(field
))
4506 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
,
4509 elt
->value
= fold_convert(TREE_TYPE(field
), size_zero_node
);
4512 tree ret
= build_constructor(type_tree
, init
);
4513 TREE_CONSTANT(ret
) = 1;
4520 tree value
= this->element_type_
->get_init_tree(gogo
, is_clear
);
4523 if (value
== error_mark_node
)
4524 return error_mark_node
;
4526 tree length_tree
= this->get_length_tree(gogo
);
4527 if (length_tree
== error_mark_node
)
4528 return error_mark_node
;
4530 length_tree
= fold_convert(sizetype
, length_tree
);
4531 tree range
= build2(RANGE_EXPR
, sizetype
, size_zero_node
,
4532 fold_build2(MINUS_EXPR
, sizetype
,
4533 length_tree
, size_one_node
));
4534 tree ret
= build_constructor_single(type_tree
, range
, value
);
4535 if (TREE_CONSTANT(value
))
4536 TREE_CONSTANT(ret
) = 1;
4541 // Handle the builtin make function for a slice.
4544 Array_type::do_make_expression_tree(Translate_context
* context
,
4545 Expression_list
* args
,
4546 source_location location
)
4548 gcc_assert(this->length_
== NULL
);
4550 Gogo
* gogo
= context
->gogo();
4551 tree type_tree
= this->get_tree(gogo
);
4552 if (type_tree
== error_mark_node
)
4553 return error_mark_node
;
4555 tree values_field
= TYPE_FIELDS(type_tree
);
4556 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(values_field
)),
4559 tree count_field
= DECL_CHAIN(values_field
);
4560 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(count_field
)),
4563 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4564 if (element_type_tree
== error_mark_node
)
4565 return error_mark_node
;
4566 tree element_size_tree
= TYPE_SIZE_UNIT(element_type_tree
);
4568 tree value
= this->element_type_
->get_init_tree(gogo
, true);
4570 // The first argument is the number of elements, the optional second
4571 // argument is the capacity.
4572 gcc_assert(args
!= NULL
&& args
->size() >= 1 && args
->size() <= 2);
4574 tree length_tree
= args
->front()->get_tree(context
);
4575 if (length_tree
== error_mark_node
)
4576 return error_mark_node
;
4577 if (!DECL_P(length_tree
))
4578 length_tree
= save_expr(length_tree
);
4579 if (!INTEGRAL_TYPE_P(TREE_TYPE(length_tree
)))
4580 length_tree
= convert_to_integer(TREE_TYPE(count_field
), length_tree
);
4582 tree bad_index
= Expression::check_bounds(length_tree
,
4583 TREE_TYPE(count_field
),
4584 NULL_TREE
, location
);
4586 length_tree
= fold_convert_loc(location
, TREE_TYPE(count_field
), length_tree
);
4588 if (args
->size() == 1)
4589 capacity_tree
= length_tree
;
4592 capacity_tree
= args
->back()->get_tree(context
);
4593 if (capacity_tree
== error_mark_node
)
4594 return error_mark_node
;
4595 if (!DECL_P(capacity_tree
))
4596 capacity_tree
= save_expr(capacity_tree
);
4597 if (!INTEGRAL_TYPE_P(TREE_TYPE(capacity_tree
)))
4598 capacity_tree
= convert_to_integer(TREE_TYPE(count_field
),
4601 bad_index
= Expression::check_bounds(capacity_tree
,
4602 TREE_TYPE(count_field
),
4603 bad_index
, location
);
4605 tree chktype
= (((TYPE_SIZE(TREE_TYPE(capacity_tree
))
4606 > TYPE_SIZE(TREE_TYPE(length_tree
)))
4607 || ((TYPE_SIZE(TREE_TYPE(capacity_tree
))
4608 == TYPE_SIZE(TREE_TYPE(length_tree
)))
4609 && TYPE_UNSIGNED(TREE_TYPE(capacity_tree
))))
4610 ? TREE_TYPE(capacity_tree
)
4611 : TREE_TYPE(length_tree
));
4612 tree chk
= fold_build2_loc(location
, LT_EXPR
, boolean_type_node
,
4613 fold_convert_loc(location
, chktype
,
4615 fold_convert_loc(location
, chktype
,
4617 if (bad_index
== NULL_TREE
)
4620 bad_index
= fold_build2_loc(location
, TRUTH_OR_EXPR
, boolean_type_node
,
4623 capacity_tree
= fold_convert_loc(location
, TREE_TYPE(count_field
),
4627 tree size_tree
= fold_build2_loc(location
, MULT_EXPR
, sizetype
,
4629 fold_convert_loc(location
, sizetype
,
4632 tree chk
= fold_build2_loc(location
, TRUTH_AND_EXPR
, boolean_type_node
,
4633 fold_build2_loc(location
, GT_EXPR
,
4635 fold_convert_loc(location
,
4639 fold_build2_loc(location
, LT_EXPR
,
4641 size_tree
, element_size_tree
));
4642 if (bad_index
== NULL_TREE
)
4645 bad_index
= fold_build2_loc(location
, TRUTH_OR_EXPR
, boolean_type_node
,
4648 tree space
= context
->gogo()->allocate_memory(this->element_type_
,
4649 size_tree
, location
);
4651 if (value
!= NULL_TREE
)
4652 space
= save_expr(space
);
4654 space
= fold_convert(TREE_TYPE(values_field
), space
);
4656 if (bad_index
!= NULL_TREE
&& bad_index
!= boolean_false_node
)
4658 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_SLICE_OUT_OF_BOUNDS
,
4660 space
= build2(COMPOUND_EXPR
, TREE_TYPE(space
),
4661 build3(COND_EXPR
, void_type_node
,
4662 bad_index
, crash
, NULL_TREE
),
4666 tree constructor
= gogo
->slice_constructor(type_tree
, space
, length_tree
,
4669 if (value
== NULL_TREE
)
4671 // The array contents are zero initialized.
4675 // The elements must be initialized.
4677 tree max
= fold_build2_loc(location
, MINUS_EXPR
, TREE_TYPE(count_field
),
4679 fold_convert_loc(location
, TREE_TYPE(count_field
),
4682 tree array_type
= build_array_type(element_type_tree
,
4683 build_index_type(max
));
4685 tree value_pointer
= fold_convert_loc(location
,
4686 build_pointer_type(array_type
),
4689 tree range
= build2(RANGE_EXPR
, sizetype
, size_zero_node
, max
);
4690 tree space_init
= build_constructor_single(array_type
, range
, value
);
4692 return build2(COMPOUND_EXPR
, TREE_TYPE(space
),
4693 build2(MODIFY_EXPR
, void_type_node
,
4694 build_fold_indirect_ref(value_pointer
),
4699 // Return a tree for a pointer to the values in ARRAY.
4702 Array_type::value_pointer_tree(Gogo
*, tree array
) const
4705 if (this->length() != NULL
)
4708 ret
= fold_convert(build_pointer_type(TREE_TYPE(TREE_TYPE(array
))),
4709 build_fold_addr_expr(array
));
4714 tree field
= TYPE_FIELDS(TREE_TYPE(array
));
4715 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)),
4717 ret
= fold_build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
,
4720 if (TREE_CONSTANT(array
))
4721 TREE_CONSTANT(ret
) = 1;
4725 // Return a tree for the length of the array ARRAY which has this
4729 Array_type::length_tree(Gogo
* gogo
, tree array
)
4731 if (this->length_
!= NULL
)
4733 if (TREE_CODE(array
) == SAVE_EXPR
)
4734 return fold_convert(integer_type_node
, this->get_length_tree(gogo
));
4736 return omit_one_operand(integer_type_node
,
4737 this->get_length_tree(gogo
), array
);
4740 // This is an open array. We need to read the length field.
4742 tree type
= TREE_TYPE(array
);
4743 gcc_assert(TREE_CODE(type
) == RECORD_TYPE
);
4745 tree field
= DECL_CHAIN(TYPE_FIELDS(type
));
4746 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__count") == 0);
4748 tree ret
= build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
, NULL_TREE
);
4749 if (TREE_CONSTANT(array
))
4750 TREE_CONSTANT(ret
) = 1;
4754 // Return a tree for the capacity of the array ARRAY which has this
4758 Array_type::capacity_tree(Gogo
* gogo
, tree array
)
4760 if (this->length_
!= NULL
)
4761 return omit_one_operand(sizetype
, this->get_length_tree(gogo
), array
);
4763 // This is an open array. We need to read the capacity field.
4765 tree type
= TREE_TYPE(array
);
4766 gcc_assert(TREE_CODE(type
) == RECORD_TYPE
);
4768 tree field
= DECL_CHAIN(DECL_CHAIN(TYPE_FIELDS(type
)));
4769 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__capacity") == 0);
4771 return build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
, NULL_TREE
);
4777 Array_type::do_export(Export
* exp
) const
4779 exp
->write_c_string("[");
4780 if (this->length_
!= NULL
)
4781 this->length_
->export_expression(exp
);
4782 exp
->write_c_string("] ");
4783 exp
->write_type(this->element_type_
);
4789 Array_type::do_import(Import
* imp
)
4791 imp
->require_c_string("[");
4793 if (imp
->peek_char() == ']')
4796 length
= Expression::import_expression(imp
);
4797 imp
->require_c_string("] ");
4798 Type
* element_type
= imp
->read_type();
4799 return Type::make_array_type(element_type
, length
);
4802 // The type of an array type descriptor.
4805 Array_type::make_array_type_descriptor_type()
4810 Type
* tdt
= Type::make_type_descriptor_type();
4811 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
4813 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
4816 Type::make_builtin_struct_type(3,
4819 "len", uintptr_type
);
4821 ret
= Type::make_builtin_named_type("ArrayType", sf
);
4827 // The type of an slice type descriptor.
4830 Array_type::make_slice_type_descriptor_type()
4835 Type
* tdt
= Type::make_type_descriptor_type();
4836 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
4839 Type::make_builtin_struct_type(2,
4843 ret
= Type::make_builtin_named_type("SliceType", sf
);
4849 // Build a type descriptor for an array/slice type.
4852 Array_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4854 if (this->length_
!= NULL
)
4855 return this->array_type_descriptor(gogo
, name
);
4857 return this->slice_type_descriptor(gogo
, name
);
4860 // Build a type descriptor for an array type.
4863 Array_type::array_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4865 source_location bloc
= BUILTINS_LOCATION
;
4867 Type
* atdt
= Array_type::make_array_type_descriptor_type();
4869 const Struct_field_list
* fields
= atdt
->struct_type()->fields();
4871 Expression_list
* vals
= new Expression_list();
4874 Struct_field_list::const_iterator p
= fields
->begin();
4875 gcc_assert(p
->field_name() == "commonType");
4876 vals
->push_back(this->type_descriptor_constructor(gogo
,
4877 RUNTIME_TYPE_KIND_ARRAY
,
4881 gcc_assert(p
->field_name() == "elem");
4882 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
4885 gcc_assert(p
->field_name() == "len");
4886 vals
->push_back(Expression::make_cast(p
->type(), this->length_
, bloc
));
4889 gcc_assert(p
== fields
->end());
4891 return Expression::make_struct_composite_literal(atdt
, vals
, bloc
);
4894 // Build a type descriptor for a slice type.
4897 Array_type::slice_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4899 source_location bloc
= BUILTINS_LOCATION
;
4901 Type
* stdt
= Array_type::make_slice_type_descriptor_type();
4903 const Struct_field_list
* fields
= stdt
->struct_type()->fields();
4905 Expression_list
* vals
= new Expression_list();
4908 Struct_field_list::const_iterator p
= fields
->begin();
4909 gcc_assert(p
->field_name() == "commonType");
4910 vals
->push_back(this->type_descriptor_constructor(gogo
,
4911 RUNTIME_TYPE_KIND_SLICE
,
4915 gcc_assert(p
->field_name() == "elem");
4916 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
4919 gcc_assert(p
== fields
->end());
4921 return Expression::make_struct_composite_literal(stdt
, vals
, bloc
);
4924 // Reflection string.
4927 Array_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
4929 ret
->push_back('[');
4930 if (this->length_
!= NULL
)
4935 if (!this->length_
->integer_constant_value(true, val
, &type
))
4936 error_at(this->length_
->location(),
4937 "array length must be integer constant expression");
4938 else if (mpz_cmp_si(val
, 0) < 0)
4939 error_at(this->length_
->location(), "array length is negative");
4940 else if (mpz_cmp_ui(val
, mpz_get_ui(val
)) != 0)
4941 error_at(this->length_
->location(), "array length is too large");
4945 snprintf(buf
, sizeof buf
, "%lu", mpz_get_ui(val
));
4950 ret
->push_back(']');
4952 this->append_reflection(this->element_type_
, gogo
, ret
);
4958 Array_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
4960 ret
->push_back('A');
4961 this->append_mangled_name(this->element_type_
, gogo
, ret
);
4962 if (this->length_
!= NULL
)
4967 if (!this->length_
->integer_constant_value(true, val
, &type
))
4968 error_at(this->length_
->location(),
4969 "array length must be integer constant expression");
4970 else if (mpz_cmp_si(val
, 0) < 0)
4971 error_at(this->length_
->location(), "array length is negative");
4972 else if (mpz_cmp_ui(val
, mpz_get_ui(val
)) != 0)
4973 error_at(this->length_
->location(), "array size is too large");
4977 snprintf(buf
, sizeof buf
, "%lu", mpz_get_ui(val
));
4982 ret
->push_back('e');
4985 // Make an array type.
4988 Type::make_array_type(Type
* element_type
, Expression
* length
)
4990 return new Array_type(element_type
, length
);
4998 Map_type::do_traverse(Traverse
* traverse
)
5000 if (Type::traverse(this->key_type_
, traverse
) == TRAVERSE_EXIT
5001 || Type::traverse(this->val_type_
, traverse
) == TRAVERSE_EXIT
)
5002 return TRAVERSE_EXIT
;
5003 return TRAVERSE_CONTINUE
;
5006 // Check that the map type is OK.
5009 Map_type::do_verify()
5011 if (this->key_type_
->struct_type() != NULL
5012 || this->key_type_
->array_type() != NULL
)
5014 error_at(this->location_
, "invalid map key type");
5020 // Whether two map types are identical.
5023 Map_type::is_identical(const Map_type
* t
, bool errors_are_identical
) const
5025 return (Type::are_identical(this->key_type(), t
->key_type(),
5026 errors_are_identical
, NULL
)
5027 && Type::are_identical(this->val_type(), t
->val_type(),
5028 errors_are_identical
, NULL
));
5034 Map_type::do_hash_for_method(Gogo
* gogo
) const
5036 return (this->key_type_
->hash_for_method(gogo
)
5037 + this->val_type_
->hash_for_method(gogo
)
5041 // Check that a call to the builtin make function is valid. For a map
5042 // the optional argument is the number of spaces to preallocate for
5046 Map_type::do_check_make_expression(Expression_list
* args
,
5047 source_location location
)
5049 if (args
!= NULL
&& !args
->empty())
5051 if (!Type::check_int_value(args
->front(), _("bad size when making map"),
5054 else if (args
->size() > 1)
5056 error_at(location
, "too many arguments when making map");
5063 // Get a tree for a map type. A map type is represented as a pointer
5064 // to a struct. The struct is __go_map in libgo/map.h.
5067 Map_type::do_get_tree(Gogo
* gogo
)
5069 static tree type_tree
;
5070 if (type_tree
== NULL_TREE
)
5072 tree struct_type
= make_node(RECORD_TYPE
);
5074 tree map_descriptor_type
= gogo
->map_descriptor_type();
5075 tree const_map_descriptor_type
=
5076 build_qualified_type(map_descriptor_type
, TYPE_QUAL_CONST
);
5077 tree name
= get_identifier("__descriptor");
5078 tree field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
,
5079 build_pointer_type(const_map_descriptor_type
));
5080 DECL_CONTEXT(field
) = struct_type
;
5081 TYPE_FIELDS(struct_type
) = field
;
5082 tree last_field
= field
;
5084 name
= get_identifier("__element_count");
5085 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
, sizetype
);
5086 DECL_CONTEXT(field
) = struct_type
;
5087 DECL_CHAIN(last_field
) = field
;
5090 name
= get_identifier("__bucket_count");
5091 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
, sizetype
);
5092 DECL_CONTEXT(field
) = struct_type
;
5093 DECL_CHAIN(last_field
) = field
;
5096 name
= get_identifier("__buckets");
5097 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
,
5098 build_pointer_type(ptr_type_node
));
5099 DECL_CONTEXT(field
) = struct_type
;
5100 DECL_CHAIN(last_field
) = field
;
5102 layout_type(struct_type
);
5104 // Give the struct a name for better debugging info.
5105 name
= get_identifier("__go_map");
5106 tree type_decl
= build_decl(BUILTINS_LOCATION
, TYPE_DECL
, name
,
5108 DECL_ARTIFICIAL(type_decl
) = 1;
5109 TYPE_NAME(struct_type
) = type_decl
;
5110 go_preserve_from_gc(type_decl
);
5111 rest_of_decl_compilation(type_decl
, 1, 0);
5113 type_tree
= build_pointer_type(struct_type
);
5114 go_preserve_from_gc(type_tree
);
5120 // Initialize a map.
5123 Map_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
5127 return fold_convert(type_tree
, null_pointer_node
);
5130 // Return an expression for a newly allocated map.
5133 Map_type::do_make_expression_tree(Translate_context
* context
,
5134 Expression_list
* args
,
5135 source_location location
)
5137 tree bad_index
= NULL_TREE
;
5140 if (args
== NULL
|| args
->empty())
5141 expr_tree
= size_zero_node
;
5144 expr_tree
= args
->front()->get_tree(context
);
5145 if (expr_tree
== error_mark_node
)
5146 return error_mark_node
;
5147 if (!DECL_P(expr_tree
))
5148 expr_tree
= save_expr(expr_tree
);
5149 if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree
)))
5150 expr_tree
= convert_to_integer(sizetype
, expr_tree
);
5151 bad_index
= Expression::check_bounds(expr_tree
, sizetype
, bad_index
,
5155 tree map_type
= this->get_tree(context
->gogo());
5157 static tree new_map_fndecl
;
5158 tree ret
= Gogo::call_builtin(&new_map_fndecl
,
5163 TREE_TYPE(TYPE_FIELDS(TREE_TYPE(map_type
))),
5164 context
->gogo()->map_descriptor(this),
5167 if (ret
== error_mark_node
)
5168 return error_mark_node
;
5169 // This can panic if the capacity is out of range.
5170 TREE_NOTHROW(new_map_fndecl
) = 0;
5172 if (bad_index
== NULL_TREE
)
5176 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_MAP_OUT_OF_BOUNDS
,
5178 return build2(COMPOUND_EXPR
, TREE_TYPE(ret
),
5179 build3(COND_EXPR
, void_type_node
,
5180 bad_index
, crash
, NULL_TREE
),
5185 // The type of a map type descriptor.
5188 Map_type::make_map_type_descriptor_type()
5193 Type
* tdt
= Type::make_type_descriptor_type();
5194 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
5197 Type::make_builtin_struct_type(3,
5202 ret
= Type::make_builtin_named_type("MapType", sf
);
5208 // Build a type descriptor for a map type.
5211 Map_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
5213 source_location bloc
= BUILTINS_LOCATION
;
5215 Type
* mtdt
= Map_type::make_map_type_descriptor_type();
5217 const Struct_field_list
* fields
= mtdt
->struct_type()->fields();
5219 Expression_list
* vals
= new Expression_list();
5222 Struct_field_list::const_iterator p
= fields
->begin();
5223 gcc_assert(p
->field_name() == "commonType");
5224 vals
->push_back(this->type_descriptor_constructor(gogo
,
5225 RUNTIME_TYPE_KIND_MAP
,
5229 gcc_assert(p
->field_name() == "key");
5230 vals
->push_back(Expression::make_type_descriptor(this->key_type_
, bloc
));
5233 gcc_assert(p
->field_name() == "elem");
5234 vals
->push_back(Expression::make_type_descriptor(this->val_type_
, bloc
));
5237 gcc_assert(p
== fields
->end());
5239 return Expression::make_struct_composite_literal(mtdt
, vals
, bloc
);
5242 // Reflection string for a map.
5245 Map_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
5247 ret
->append("map[");
5248 this->append_reflection(this->key_type_
, gogo
, ret
);
5250 this->append_reflection(this->val_type_
, gogo
, ret
);
5253 // Mangled name for a map.
5256 Map_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
5258 ret
->push_back('M');
5259 this->append_mangled_name(this->key_type_
, gogo
, ret
);
5261 this->append_mangled_name(this->val_type_
, gogo
, ret
);
5264 // Export a map type.
5267 Map_type::do_export(Export
* exp
) const
5269 exp
->write_c_string("map [");
5270 exp
->write_type(this->key_type_
);
5271 exp
->write_c_string("] ");
5272 exp
->write_type(this->val_type_
);
5275 // Import a map type.
5278 Map_type::do_import(Import
* imp
)
5280 imp
->require_c_string("map [");
5281 Type
* key_type
= imp
->read_type();
5282 imp
->require_c_string("] ");
5283 Type
* val_type
= imp
->read_type();
5284 return Type::make_map_type(key_type
, val_type
, imp
->location());
5290 Type::make_map_type(Type
* key_type
, Type
* val_type
, source_location location
)
5292 return new Map_type(key_type
, val_type
, location
);
5295 // Class Channel_type.
5300 Channel_type::do_hash_for_method(Gogo
* gogo
) const
5302 unsigned int ret
= 0;
5303 if (this->may_send_
)
5305 if (this->may_receive_
)
5307 if (this->element_type_
!= NULL
)
5308 ret
+= this->element_type_
->hash_for_method(gogo
) << 2;
5312 // Whether this type is the same as T.
5315 Channel_type::is_identical(const Channel_type
* t
,
5316 bool errors_are_identical
) const
5318 if (!Type::are_identical(this->element_type(), t
->element_type(),
5319 errors_are_identical
, NULL
))
5321 return (this->may_send_
== t
->may_send_
5322 && this->may_receive_
== t
->may_receive_
);
5325 // Check whether the parameters for a call to the builtin function
5326 // make are OK for a channel. A channel can take an optional single
5327 // parameter which is the buffer size.
5330 Channel_type::do_check_make_expression(Expression_list
* args
,
5331 source_location location
)
5333 if (args
!= NULL
&& !args
->empty())
5335 if (!Type::check_int_value(args
->front(),
5336 _("bad buffer size when making channel"),
5339 else if (args
->size() > 1)
5341 error_at(location
, "too many arguments when making channel");
5348 // Return the tree for a channel type. A channel is a pointer to a
5349 // __go_channel struct. The __go_channel struct is defined in
5350 // libgo/runtime/channel.h.
5353 Channel_type::do_get_tree(Gogo
*)
5355 static tree type_tree
;
5356 if (type_tree
== NULL_TREE
)
5358 tree ret
= make_node(RECORD_TYPE
);
5359 TYPE_NAME(ret
) = get_identifier("__go_channel");
5360 TYPE_STUB_DECL(ret
) = build_decl(BUILTINS_LOCATION
, TYPE_DECL
, NULL_TREE
,
5362 type_tree
= build_pointer_type(ret
);
5363 go_preserve_from_gc(type_tree
);
5368 // Initialize a channel variable.
5371 Channel_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
5375 return fold_convert(type_tree
, null_pointer_node
);
5378 // Handle the builtin function make for a channel.
5381 Channel_type::do_make_expression_tree(Translate_context
* context
,
5382 Expression_list
* args
,
5383 source_location location
)
5385 Gogo
* gogo
= context
->gogo();
5386 tree channel_type
= this->get_tree(gogo
);
5388 tree element_tree
= this->element_type_
->get_tree(gogo
);
5389 tree element_size_tree
= size_in_bytes(element_tree
);
5391 tree bad_index
= NULL_TREE
;
5394 if (args
== NULL
|| args
->empty())
5395 expr_tree
= size_zero_node
;
5398 expr_tree
= args
->front()->get_tree(context
);
5399 if (expr_tree
== error_mark_node
)
5400 return error_mark_node
;
5401 if (!DECL_P(expr_tree
))
5402 expr_tree
= save_expr(expr_tree
);
5403 if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree
)))
5404 expr_tree
= convert_to_integer(sizetype
, expr_tree
);
5405 bad_index
= Expression::check_bounds(expr_tree
, sizetype
, bad_index
,
5409 static tree new_channel_fndecl
;
5410 tree ret
= Gogo::call_builtin(&new_channel_fndecl
,
5419 if (ret
== error_mark_node
)
5420 return error_mark_node
;
5421 // This can panic if the capacity is out of range.
5422 TREE_NOTHROW(new_channel_fndecl
) = 0;
5424 if (bad_index
== NULL_TREE
)
5428 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_CHAN_OUT_OF_BOUNDS
,
5430 return build2(COMPOUND_EXPR
, TREE_TYPE(ret
),
5431 build3(COND_EXPR
, void_type_node
,
5432 bad_index
, crash
, NULL_TREE
),
5437 // Build a type descriptor for a channel type.
5440 Channel_type::make_chan_type_descriptor_type()
5445 Type
* tdt
= Type::make_type_descriptor_type();
5446 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
5448 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
5451 Type::make_builtin_struct_type(3,
5454 "dir", uintptr_type
);
5456 ret
= Type::make_builtin_named_type("ChanType", sf
);
5462 // Build a type descriptor for a map type.
5465 Channel_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
5467 source_location bloc
= BUILTINS_LOCATION
;
5469 Type
* ctdt
= Channel_type::make_chan_type_descriptor_type();
5471 const Struct_field_list
* fields
= ctdt
->struct_type()->fields();
5473 Expression_list
* vals
= new Expression_list();
5476 Struct_field_list::const_iterator p
= fields
->begin();
5477 gcc_assert(p
->field_name() == "commonType");
5478 vals
->push_back(this->type_descriptor_constructor(gogo
,
5479 RUNTIME_TYPE_KIND_CHAN
,
5483 gcc_assert(p
->field_name() == "elem");
5484 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
5487 gcc_assert(p
->field_name() == "dir");
5488 // These bits must match the ones in libgo/runtime/go-type.h.
5490 if (this->may_receive_
)
5492 if (this->may_send_
)
5495 mpz_init_set_ui(iv
, val
);
5496 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
5500 gcc_assert(p
== fields
->end());
5502 return Expression::make_struct_composite_literal(ctdt
, vals
, bloc
);
5505 // Reflection string.
5508 Channel_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
5510 if (!this->may_send_
)
5512 ret
->append("chan");
5513 if (!this->may_receive_
)
5515 ret
->push_back(' ');
5516 this->append_reflection(this->element_type_
, gogo
, ret
);
5522 Channel_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
5524 ret
->push_back('C');
5525 this->append_mangled_name(this->element_type_
, gogo
, ret
);
5526 if (this->may_send_
)
5527 ret
->push_back('s');
5528 if (this->may_receive_
)
5529 ret
->push_back('r');
5530 ret
->push_back('e');
5536 Channel_type::do_export(Export
* exp
) const
5538 exp
->write_c_string("chan ");
5539 if (this->may_send_
&& !this->may_receive_
)
5540 exp
->write_c_string("-< ");
5541 else if (this->may_receive_
&& !this->may_send_
)
5542 exp
->write_c_string("<- ");
5543 exp
->write_type(this->element_type_
);
5549 Channel_type::do_import(Import
* imp
)
5551 imp
->require_c_string("chan ");
5555 if (imp
->match_c_string("-< "))
5559 may_receive
= false;
5561 else if (imp
->match_c_string("<- "))
5573 Type
* element_type
= imp
->read_type();
5575 return Type::make_channel_type(may_send
, may_receive
, element_type
);
5578 // Make a new channel type.
5581 Type::make_channel_type(bool send
, bool receive
, Type
* element_type
)
5583 return new Channel_type(send
, receive
, element_type
);
5586 // Class Interface_type.
5591 Interface_type::do_traverse(Traverse
* traverse
)
5593 if (this->methods_
== NULL
)
5594 return TRAVERSE_CONTINUE
;
5595 return this->methods_
->traverse(traverse
);
5598 // Finalize the methods. This handles interface inheritance.
5601 Interface_type::finalize_methods()
5603 if (this->methods_
== NULL
)
5605 bool is_recursive
= false;
5608 while (from
< this->methods_
->size())
5610 const Typed_identifier
* p
= &this->methods_
->at(from
);
5611 if (!p
->name().empty())
5614 for (i
= 0; i
< to
; ++i
)
5616 if (this->methods_
->at(i
).name() == p
->name())
5618 error_at(p
->location(), "duplicate method %qs",
5619 Gogo::message_name(p
->name()).c_str());
5626 this->methods_
->set(to
, *p
);
5632 Interface_type
* it
= p
->type()->interface_type();
5635 error_at(p
->location(), "interface contains embedded non-interface");
5643 error_at(p
->location(), "invalid recursive interface");
5644 is_recursive
= true;
5649 const Typed_identifier_list
* methods
= it
->methods();
5650 if (methods
== NULL
)
5655 for (Typed_identifier_list::const_iterator q
= methods
->begin();
5656 q
!= methods
->end();
5659 if (q
->name().empty())
5661 if (q
->type() == p
->type())
5662 error_at(p
->location(), "interface inheritance loop");
5666 for (i
= from
+ 1; i
< this->methods_
->size(); ++i
)
5668 const Typed_identifier
* r
= &this->methods_
->at(i
);
5669 if (r
->name().empty() && r
->type() == q
->type())
5671 error_at(p
->location(),
5672 "inherited interface listed twice");
5676 if (i
== this->methods_
->size())
5677 this->methods_
->push_back(Typed_identifier(q
->name(),
5682 else if (this->find_method(q
->name()) == NULL
)
5683 this->methods_
->push_back(Typed_identifier(q
->name(), q
->type(),
5688 error_at(p
->location(), "inherited method %qs is ambiguous",
5689 Gogo::message_name(q
->name()).c_str());
5696 delete this->methods_
;
5697 this->methods_
= NULL
;
5701 this->methods_
->resize(to
);
5702 this->methods_
->sort_by_name();
5706 // Return the method NAME, or NULL.
5708 const Typed_identifier
*
5709 Interface_type::find_method(const std::string
& name
) const
5711 if (this->methods_
== NULL
)
5713 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5714 p
!= this->methods_
->end();
5716 if (p
->name() == name
)
5721 // Return the method index.
5724 Interface_type::method_index(const std::string
& name
) const
5726 gcc_assert(this->methods_
!= NULL
);
5728 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5729 p
!= this->methods_
->end();
5731 if (p
->name() == name
)
5736 // Return whether NAME is an unexported method, for better error
5740 Interface_type::is_unexported_method(Gogo
* gogo
, const std::string
& name
) const
5742 if (this->methods_
== NULL
)
5744 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5745 p
!= this->methods_
->end();
5748 const std::string
& method_name(p
->name());
5749 if (Gogo::is_hidden_name(method_name
)
5750 && name
== Gogo::unpack_hidden_name(method_name
)
5751 && gogo
->pack_hidden_name(name
, false) != method_name
)
5757 // Whether this type is identical with T.
5760 Interface_type::is_identical(const Interface_type
* t
,
5761 bool errors_are_identical
) const
5763 // We require the same methods with the same types. The methods
5764 // have already been sorted.
5765 if (this->methods() == NULL
|| t
->methods() == NULL
)
5766 return this->methods() == t
->methods();
5768 Typed_identifier_list::const_iterator p1
= this->methods()->begin();
5769 for (Typed_identifier_list::const_iterator p2
= t
->methods()->begin();
5770 p2
!= t
->methods()->end();
5773 if (p1
== this->methods()->end())
5775 if (p1
->name() != p2
->name()
5776 || !Type::are_identical(p1
->type(), p2
->type(),
5777 errors_are_identical
, NULL
))
5780 if (p1
!= this->methods()->end())
5785 // Whether we can assign the interface type T to this type. The types
5786 // are known to not be identical. An interface assignment is only
5787 // permitted if T is known to implement all methods in THIS.
5788 // Otherwise a type guard is required.
5791 Interface_type::is_compatible_for_assign(const Interface_type
* t
,
5792 std::string
* reason
) const
5794 if (this->methods() == NULL
)
5796 for (Typed_identifier_list::const_iterator p
= this->methods()->begin();
5797 p
!= this->methods()->end();
5800 const Typed_identifier
* m
= t
->find_method(p
->name());
5806 snprintf(buf
, sizeof buf
,
5807 _("need explicit conversion; missing method %s%s%s"),
5808 open_quote
, Gogo::message_name(p
->name()).c_str(),
5810 reason
->assign(buf
);
5815 std::string subreason
;
5816 if (!Type::are_identical(p
->type(), m
->type(), true, &subreason
))
5820 std::string n
= Gogo::message_name(p
->name());
5821 size_t len
= 100 + n
.length() + subreason
.length();
5822 char* buf
= new char[len
];
5823 if (subreason
.empty())
5824 snprintf(buf
, len
, _("incompatible type for method %s%s%s"),
5825 open_quote
, n
.c_str(), close_quote
);
5828 _("incompatible type for method %s%s%s (%s)"),
5829 open_quote
, n
.c_str(), close_quote
,
5831 reason
->assign(buf
);
5844 Interface_type::do_hash_for_method(Gogo
* gogo
) const
5846 unsigned int ret
= 0;
5847 if (this->methods_
!= NULL
)
5849 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5850 p
!= this->methods_
->end();
5853 ret
= Type::hash_string(p
->name(), ret
);
5854 ret
+= p
->type()->hash_for_method(gogo
);
5861 // Return true if T implements the interface. If it does not, and
5862 // REASON is not NULL, set *REASON to a useful error message.
5865 Interface_type::implements_interface(const Type
* t
, std::string
* reason
) const
5867 if (this->methods_
== NULL
)
5870 bool is_pointer
= false;
5871 const Named_type
* nt
= t
->named_type();
5872 const Struct_type
* st
= t
->struct_type();
5873 // If we start with a named type, we don't dereference it to find
5877 const Type
* pt
= t
->points_to();
5880 // If T is a pointer to a named type, then we need to look at
5881 // the type to which it points.
5883 nt
= pt
->named_type();
5884 st
= pt
->struct_type();
5888 // If we have a named type, get the methods from it rather than from
5893 // Only named and struct types have methods.
5894 if (nt
== NULL
&& st
== NULL
)
5898 if (t
->points_to() != NULL
5899 && t
->points_to()->interface_type() != NULL
)
5900 reason
->assign(_("pointer to interface type has no methods"));
5902 reason
->assign(_("type has no methods"));
5907 if (nt
!= NULL
? !nt
->has_any_methods() : !st
->has_any_methods())
5911 if (t
->points_to() != NULL
5912 && t
->points_to()->interface_type() != NULL
)
5913 reason
->assign(_("pointer to interface type has no methods"));
5915 reason
->assign(_("type has no methods"));
5920 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5921 p
!= this->methods_
->end();
5924 bool is_ambiguous
= false;
5925 Method
* m
= (nt
!= NULL
5926 ? nt
->method_function(p
->name(), &is_ambiguous
)
5927 : st
->method_function(p
->name(), &is_ambiguous
));
5932 std::string n
= Gogo::message_name(p
->name());
5933 size_t len
= n
.length() + 100;
5934 char* buf
= new char[len
];
5936 snprintf(buf
, len
, _("ambiguous method %s%s%s"),
5937 open_quote
, n
.c_str(), close_quote
);
5939 snprintf(buf
, len
, _("missing method %s%s%s"),
5940 open_quote
, n
.c_str(), close_quote
);
5941 reason
->assign(buf
);
5947 Function_type
*p_fn_type
= p
->type()->function_type();
5948 Function_type
* m_fn_type
= m
->type()->function_type();
5949 gcc_assert(p_fn_type
!= NULL
&& m_fn_type
!= NULL
);
5950 std::string subreason
;
5951 if (!p_fn_type
->is_identical(m_fn_type
, true, true, &subreason
))
5955 std::string n
= Gogo::message_name(p
->name());
5956 size_t len
= 100 + n
.length() + subreason
.length();
5957 char* buf
= new char[len
];
5958 if (subreason
.empty())
5959 snprintf(buf
, len
, _("incompatible type for method %s%s%s"),
5960 open_quote
, n
.c_str(), close_quote
);
5963 _("incompatible type for method %s%s%s (%s)"),
5964 open_quote
, n
.c_str(), close_quote
,
5966 reason
->assign(buf
);
5972 if (!is_pointer
&& !m
->is_value_method())
5976 std::string n
= Gogo::message_name(p
->name());
5977 size_t len
= 100 + n
.length();
5978 char* buf
= new char[len
];
5979 snprintf(buf
, len
, _("method %s%s%s requires a pointer"),
5980 open_quote
, n
.c_str(), close_quote
);
5981 reason
->assign(buf
);
5991 // Return a tree for an interface type. An interface is a pointer to
5992 // a struct. The struct has three fields. The first field is a
5993 // pointer to the type descriptor for the dynamic type of the object.
5994 // The second field is a pointer to a table of methods for the
5995 // interface to be used with the object. The third field is the value
5996 // of the object itself.
5999 Interface_type::do_get_tree(Gogo
* gogo
)
6001 if (this->methods_
== NULL
)
6003 // At the tree level, use the same type for all empty
6004 // interfaces. This lets us assign them to each other directly
6005 // without triggering GIMPLE type errors.
6006 tree dtype
= Type::make_type_descriptor_type()->get_tree(gogo
);
6007 dtype
= build_pointer_type(build_qualified_type(dtype
, TYPE_QUAL_CONST
));
6008 static tree empty_interface
;
6009 return Gogo::builtin_struct(&empty_interface
, "__go_empty_interface",
6011 "__type_descriptor",
6017 return this->fill_in_tree(gogo
, make_node(RECORD_TYPE
));
6020 // Fill in the tree for an interface type. This is used for named
6024 Interface_type::fill_in_tree(Gogo
* gogo
, tree type
)
6026 gcc_assert(this->methods_
!= NULL
);
6028 // Because the methods may refer to the interface type itself, we
6029 // need to build the interface type first, and then update the
6030 // method pointer later.
6032 tree field_trees
= NULL_TREE
;
6033 tree
* pp
= &field_trees
;
6035 tree name_tree
= get_identifier("__methods");
6036 tree methods_field
= build_decl(this->location_
, FIELD_DECL
, name_tree
,
6038 DECL_CONTEXT(methods_field
) = type
;
6039 *pp
= methods_field
;
6040 pp
= &DECL_CHAIN(methods_field
);
6042 name_tree
= get_identifier("__object");
6043 tree field
= build_decl(this->location_
, FIELD_DECL
, name_tree
,
6045 DECL_CONTEXT(field
) = type
;
6048 TYPE_FIELDS(type
) = field_trees
;
6052 // Build the type of the table of methods.
6054 tree method_table
= make_node(RECORD_TYPE
);
6056 // The first field is a pointer to the type descriptor.
6057 name_tree
= get_identifier("__type_descriptor");
6058 tree dtype
= Type::make_type_descriptor_type()->get_tree(gogo
);
6059 dtype
= build_pointer_type(build_qualified_type(dtype
, TYPE_QUAL_CONST
));
6060 field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, dtype
);
6061 DECL_CONTEXT(field
) = method_table
;
6062 TYPE_FIELDS(method_table
) = field
;
6064 std::string last_name
= "";
6065 pp
= &DECL_CHAIN(field
);
6066 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
6067 p
!= this->methods_
->end();
6070 std::string name
= Gogo::unpack_hidden_name(p
->name());
6071 name_tree
= get_identifier_with_length(name
.data(), name
.length());
6072 tree field_type
= p
->type()->get_tree(gogo
);
6073 if (field_type
== error_mark_node
)
6074 return error_mark_node
;
6075 field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, field_type
);
6076 DECL_CONTEXT(field
) = method_table
;
6078 pp
= &DECL_CHAIN(field
);
6079 // Sanity check: the names should be sorted.
6080 gcc_assert(p
->name() > last_name
);
6081 last_name
= p
->name();
6083 layout_type(method_table
);
6085 // Update the type of the __methods field from a generic pointer to
6086 // a pointer to the method table.
6087 TREE_TYPE(methods_field
) = build_pointer_type(method_table
);
6092 // Initialization value.
6095 Interface_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
6100 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
, 2);
6101 for (tree field
= TYPE_FIELDS(type_tree
);
6103 field
= DECL_CHAIN(field
))
6105 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
6107 elt
->value
= fold_convert(TREE_TYPE(field
), null_pointer_node
);
6110 tree ret
= build_constructor(type_tree
, init
);
6111 TREE_CONSTANT(ret
) = 1;
6115 // The type of an interface type descriptor.
6118 Interface_type::make_interface_type_descriptor_type()
6123 Type
* tdt
= Type::make_type_descriptor_type();
6124 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
6126 Type
* string_type
= Type::lookup_string_type();
6127 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
6130 Type::make_builtin_struct_type(3,
6131 "name", pointer_string_type
,
6132 "pkgPath", pointer_string_type
,
6135 Type
* nsm
= Type::make_builtin_named_type("imethod", sm
);
6137 Type
* slice_nsm
= Type::make_array_type(nsm
, NULL
);
6139 Struct_type
* s
= Type::make_builtin_struct_type(2,
6141 "methods", slice_nsm
);
6143 ret
= Type::make_builtin_named_type("InterfaceType", s
);
6149 // Build a type descriptor for an interface type.
6152 Interface_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
6154 source_location bloc
= BUILTINS_LOCATION
;
6156 Type
* itdt
= Interface_type::make_interface_type_descriptor_type();
6158 const Struct_field_list
* ifields
= itdt
->struct_type()->fields();
6160 Expression_list
* ivals
= new Expression_list();
6163 Struct_field_list::const_iterator pif
= ifields
->begin();
6164 gcc_assert(pif
->field_name() == "commonType");
6165 ivals
->push_back(this->type_descriptor_constructor(gogo
,
6166 RUNTIME_TYPE_KIND_INTERFACE
,
6170 gcc_assert(pif
->field_name() == "methods");
6172 Expression_list
* methods
= new Expression_list();
6173 if (this->methods_
!= NULL
&& !this->methods_
->empty())
6175 Type
* elemtype
= pif
->type()->array_type()->element_type();
6177 methods
->reserve(this->methods_
->size());
6178 for (Typed_identifier_list::const_iterator pm
= this->methods_
->begin();
6179 pm
!= this->methods_
->end();
6182 const Struct_field_list
* mfields
= elemtype
->struct_type()->fields();
6184 Expression_list
* mvals
= new Expression_list();
6187 Struct_field_list::const_iterator pmf
= mfields
->begin();
6188 gcc_assert(pmf
->field_name() == "name");
6189 std::string s
= Gogo::unpack_hidden_name(pm
->name());
6190 Expression
* e
= Expression::make_string(s
, bloc
);
6191 mvals
->push_back(Expression::make_unary(OPERATOR_AND
, e
, bloc
));
6194 gcc_assert(pmf
->field_name() == "pkgPath");
6195 if (!Gogo::is_hidden_name(pm
->name()))
6196 mvals
->push_back(Expression::make_nil(bloc
));
6199 s
= Gogo::hidden_name_prefix(pm
->name());
6200 e
= Expression::make_string(s
, bloc
);
6201 mvals
->push_back(Expression::make_unary(OPERATOR_AND
, e
, bloc
));
6205 gcc_assert(pmf
->field_name() == "typ");
6206 mvals
->push_back(Expression::make_type_descriptor(pm
->type(), bloc
));
6209 gcc_assert(pmf
== mfields
->end());
6211 e
= Expression::make_struct_composite_literal(elemtype
, mvals
,
6213 methods
->push_back(e
);
6217 ivals
->push_back(Expression::make_slice_composite_literal(pif
->type(),
6221 gcc_assert(pif
== ifields
->end());
6223 return Expression::make_struct_composite_literal(itdt
, ivals
, bloc
);
6226 // Reflection string.
6229 Interface_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
6231 ret
->append("interface {");
6232 if (this->methods_
!= NULL
)
6234 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
6235 p
!= this->methods_
->end();
6238 if (p
!= this->methods_
->begin())
6240 ret
->push_back(' ');
6241 ret
->append(Gogo::unpack_hidden_name(p
->name()));
6242 std::string sub
= p
->type()->reflection(gogo
);
6243 gcc_assert(sub
.compare(0, 4, "func") == 0);
6244 sub
= sub
.substr(4);
6254 Interface_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
6256 ret
->push_back('I');
6258 const Typed_identifier_list
* methods
= this->methods_
;
6259 if (methods
!= NULL
)
6261 for (Typed_identifier_list::const_iterator p
= methods
->begin();
6262 p
!= methods
->end();
6265 std::string n
= Gogo::unpack_hidden_name(p
->name());
6267 snprintf(buf
, sizeof buf
, "%u_",
6268 static_cast<unsigned int>(n
.length()));
6271 this->append_mangled_name(p
->type(), gogo
, ret
);
6275 ret
->push_back('e');
6281 Interface_type::do_export(Export
* exp
) const
6283 exp
->write_c_string("interface { ");
6285 const Typed_identifier_list
* methods
= this->methods_
;
6286 if (methods
!= NULL
)
6288 for (Typed_identifier_list::const_iterator pm
= methods
->begin();
6289 pm
!= methods
->end();
6292 exp
->write_string(pm
->name());
6293 exp
->write_c_string(" (");
6295 const Function_type
* fntype
= pm
->type()->function_type();
6298 const Typed_identifier_list
* parameters
= fntype
->parameters();
6299 if (parameters
!= NULL
)
6301 bool is_varargs
= fntype
->is_varargs();
6302 for (Typed_identifier_list::const_iterator pp
=
6303 parameters
->begin();
6304 pp
!= parameters
->end();
6310 exp
->write_c_string(", ");
6311 if (!is_varargs
|| pp
+ 1 != parameters
->end())
6312 exp
->write_type(pp
->type());
6315 exp
->write_c_string("...");
6316 Type
*pptype
= pp
->type();
6317 exp
->write_type(pptype
->array_type()->element_type());
6322 exp
->write_c_string(")");
6324 const Typed_identifier_list
* results
= fntype
->results();
6325 if (results
!= NULL
)
6327 exp
->write_c_string(" ");
6328 if (results
->size() == 1)
6329 exp
->write_type(results
->begin()->type());
6333 exp
->write_c_string("(");
6334 for (Typed_identifier_list::const_iterator p
=
6336 p
!= results
->end();
6342 exp
->write_c_string(", ");
6343 exp
->write_type(p
->type());
6345 exp
->write_c_string(")");
6349 exp
->write_c_string("; ");
6353 exp
->write_c_string("}");
6356 // Import an interface type.
6359 Interface_type::do_import(Import
* imp
)
6361 imp
->require_c_string("interface { ");
6363 Typed_identifier_list
* methods
= new Typed_identifier_list
;
6364 while (imp
->peek_char() != '}')
6366 std::string name
= imp
->read_identifier();
6367 imp
->require_c_string(" (");
6369 Typed_identifier_list
* parameters
;
6370 bool is_varargs
= false;
6371 if (imp
->peek_char() == ')')
6375 parameters
= new Typed_identifier_list
;
6378 if (imp
->match_c_string("..."))
6384 Type
* ptype
= imp
->read_type();
6386 ptype
= Type::make_array_type(ptype
, NULL
);
6387 parameters
->push_back(Typed_identifier(Import::import_marker
,
6388 ptype
, imp
->location()));
6389 if (imp
->peek_char() != ',')
6391 gcc_assert(!is_varargs
);
6392 imp
->require_c_string(", ");
6395 imp
->require_c_string(")");
6397 Typed_identifier_list
* results
;
6398 if (imp
->peek_char() != ' ')
6402 results
= new Typed_identifier_list
;
6404 if (imp
->peek_char() != '(')
6406 Type
* rtype
= imp
->read_type();
6407 results
->push_back(Typed_identifier(Import::import_marker
,
6408 rtype
, imp
->location()));
6415 Type
* rtype
= imp
->read_type();
6416 results
->push_back(Typed_identifier(Import::import_marker
,
6417 rtype
, imp
->location()));
6418 if (imp
->peek_char() != ',')
6420 imp
->require_c_string(", ");
6422 imp
->require_c_string(")");
6426 Function_type
* fntype
= Type::make_function_type(NULL
, parameters
,
6430 fntype
->set_is_varargs();
6431 methods
->push_back(Typed_identifier(name
, fntype
, imp
->location()));
6433 imp
->require_c_string("; ");
6436 imp
->require_c_string("}");
6438 if (methods
->empty())
6444 return Type::make_interface_type(methods
, imp
->location());
6447 // Make an interface type.
6450 Type::make_interface_type(Typed_identifier_list
* methods
,
6451 source_location location
)
6453 return new Interface_type(methods
, location
);
6458 // Bind a method to an object.
6461 Method::bind_method(Expression
* expr
, source_location location
) const
6463 if (this->stub_
== NULL
)
6465 // When there is no stub object, the binding is determined by
6467 return this->do_bind_method(expr
, location
);
6470 Expression
* func
= Expression::make_func_reference(this->stub_
, NULL
,
6472 return Expression::make_bound_method(expr
, func
, location
);
6475 // Return the named object associated with a method. This may only be
6476 // called after methods are finalized.
6479 Method::named_object() const
6481 if (this->stub_
!= NULL
)
6483 return this->do_named_object();
6486 // Class Named_method.
6488 // The type of the method.
6491 Named_method::do_type() const
6493 if (this->named_object_
->is_function())
6494 return this->named_object_
->func_value()->type();
6495 else if (this->named_object_
->is_function_declaration())
6496 return this->named_object_
->func_declaration_value()->type();
6501 // Return the location of the method receiver.
6504 Named_method::do_receiver_location() const
6506 return this->do_type()->receiver()->location();
6509 // Bind a method to an object.
6512 Named_method::do_bind_method(Expression
* expr
, source_location location
) const
6514 Expression
* func
= Expression::make_func_reference(this->named_object_
, NULL
,
6516 Bound_method_expression
* bme
= Expression::make_bound_method(expr
, func
,
6518 // If this is not a local method, and it does not use a stub, then
6519 // the real method expects a different type. We need to cast the
6521 if (this->depth() > 0 && !this->needs_stub_method())
6523 Function_type
* ftype
= this->do_type();
6524 gcc_assert(ftype
->is_method());
6525 Type
* frtype
= ftype
->receiver()->type();
6526 bme
->set_first_argument_type(frtype
);
6531 // Class Interface_method.
6533 // Bind a method to an object.
6536 Interface_method::do_bind_method(Expression
* expr
,
6537 source_location location
) const
6539 return Expression::make_interface_field_reference(expr
, this->name_
,
6545 // Insert a new method. Return true if it was inserted, false
6549 Methods::insert(const std::string
& name
, Method
* m
)
6551 std::pair
<Method_map::iterator
, bool> ins
=
6552 this->methods_
.insert(std::make_pair(name
, m
));
6557 Method
* old_method
= ins
.first
->second
;
6558 if (m
->depth() < old_method
->depth())
6561 ins
.first
->second
= m
;
6566 if (m
->depth() == old_method
->depth())
6567 old_method
->set_is_ambiguous();
6573 // Return the number of unambiguous methods.
6576 Methods::count() const
6579 for (Method_map::const_iterator p
= this->methods_
.begin();
6580 p
!= this->methods_
.end();
6582 if (!p
->second
->is_ambiguous())
6587 // Class Named_type.
6589 // Return the name of the type.
6592 Named_type::name() const
6594 return this->named_object_
->name();
6597 // Return the name of the type to use in an error message.
6600 Named_type::message_name() const
6602 return this->named_object_
->message_name();
6605 // Return the base type for this type. We have to be careful about
6606 // circular type definitions, which are invalid but may be seen here.
6609 Named_type::named_base()
6611 if (this->seen_
> 0)
6614 Type
* ret
= this->type_
->base();
6620 Named_type::named_base() const
6622 if (this->seen_
> 0)
6625 const Type
* ret
= this->type_
->base();
6630 // Return whether this is an error type. We have to be careful about
6631 // circular type definitions, which are invalid but may be seen here.
6634 Named_type::is_named_error_type() const
6636 if (this->seen_
> 0)
6639 bool ret
= this->type_
->is_error_type();
6644 // Add a method to this type.
6647 Named_type::add_method(const std::string
& name
, Function
* function
)
6649 if (this->local_methods_
== NULL
)
6650 this->local_methods_
= new Bindings(NULL
);
6651 return this->local_methods_
->add_function(name
, NULL
, function
);
6654 // Add a method declaration to this type.
6657 Named_type::add_method_declaration(const std::string
& name
, Package
* package
,
6658 Function_type
* type
,
6659 source_location location
)
6661 if (this->local_methods_
== NULL
)
6662 this->local_methods_
= new Bindings(NULL
);
6663 return this->local_methods_
->add_function_declaration(name
, package
, type
,
6667 // Add an existing method to this type.
6670 Named_type::add_existing_method(Named_object
* no
)
6672 if (this->local_methods_
== NULL
)
6673 this->local_methods_
= new Bindings(NULL
);
6674 this->local_methods_
->add_named_object(no
);
6677 // Look for a local method NAME, and returns its named object, or NULL
6681 Named_type::find_local_method(const std::string
& name
) const
6683 if (this->local_methods_
== NULL
)
6685 return this->local_methods_
->lookup(name
);
6688 // Return whether NAME is an unexported field or method, for better
6692 Named_type::is_unexported_local_method(Gogo
* gogo
,
6693 const std::string
& name
) const
6695 Bindings
* methods
= this->local_methods_
;
6696 if (methods
!= NULL
)
6698 for (Bindings::const_declarations_iterator p
=
6699 methods
->begin_declarations();
6700 p
!= methods
->end_declarations();
6703 if (Gogo::is_hidden_name(p
->first
)
6704 && name
== Gogo::unpack_hidden_name(p
->first
)
6705 && gogo
->pack_hidden_name(name
, false) != p
->first
)
6712 // Build the complete list of methods for this type, which means
6713 // recursively including all methods for anonymous fields. Create all
6717 Named_type::finalize_methods(Gogo
* gogo
)
6719 if (this->all_methods_
!= NULL
)
6722 if (this->local_methods_
!= NULL
6723 && (this->points_to() != NULL
|| this->interface_type() != NULL
))
6725 const Bindings
* lm
= this->local_methods_
;
6726 for (Bindings::const_declarations_iterator p
= lm
->begin_declarations();
6727 p
!= lm
->end_declarations();
6729 error_at(p
->second
->location(),
6730 "invalid pointer or interface receiver type");
6731 delete this->local_methods_
;
6732 this->local_methods_
= NULL
;
6736 Type::finalize_methods(gogo
, this, this->location_
, &this->all_methods_
);
6739 // Return the method NAME, or NULL if there isn't one or if it is
6740 // ambiguous. Set *IS_AMBIGUOUS if the method exists but is
6744 Named_type::method_function(const std::string
& name
, bool* is_ambiguous
) const
6746 return Type::method_function(this->all_methods_
, name
, is_ambiguous
);
6749 // Return a pointer to the interface method table for this type for
6750 // the interface INTERFACE. IS_POINTER is true if this is for a
6754 Named_type::interface_method_table(Gogo
* gogo
, const Interface_type
* interface
,
6757 gcc_assert(!interface
->is_empty());
6759 Interface_method_tables
** pimt
= (is_pointer
6760 ? &this->interface_method_tables_
6761 : &this->pointer_interface_method_tables_
);
6764 *pimt
= new Interface_method_tables(5);
6766 std::pair
<const Interface_type
*, tree
> val(interface
, NULL_TREE
);
6767 std::pair
<Interface_method_tables::iterator
, bool> ins
= (*pimt
)->insert(val
);
6771 // This is a new entry in the hash table.
6772 gcc_assert(ins
.first
->second
== NULL_TREE
);
6773 ins
.first
->second
= gogo
->interface_method_table_for_type(interface
,
6778 tree decl
= ins
.first
->second
;
6779 if (decl
== error_mark_node
)
6780 return error_mark_node
;
6781 gcc_assert(decl
!= NULL_TREE
&& TREE_CODE(decl
) == VAR_DECL
);
6782 return build_fold_addr_expr(decl
);
6785 // Return whether a named type has any hidden fields.
6788 Named_type::named_type_has_hidden_fields(std::string
* reason
) const
6790 if (this->seen_
> 0)
6793 bool ret
= this->type_
->has_hidden_fields(this, reason
);
6798 // Look for a use of a complete type within another type. This is
6799 // used to check that we don't try to use a type within itself.
6801 class Find_type_use
: public Traverse
6804 Find_type_use(Type
* find_type
)
6805 : Traverse(traverse_types
),
6806 find_type_(find_type
), found_(false)
6809 // Whether we found the type.
6812 { return this->found_
; }
6819 // The type we are looking for.
6821 // Whether we found the type.
6825 // Check for FIND_TYPE in TYPE.
6828 Find_type_use::type(Type
* type
)
6830 if (this->find_type_
== type
)
6832 this->found_
= true;
6833 return TRAVERSE_EXIT
;
6835 // It's OK if we see a reference to the type in any type which is
6836 // essentially a pointer: a pointer, a slice, a function, a map, or
6838 if (type
->points_to() != NULL
6839 || type
->is_open_array_type()
6840 || type
->function_type() != NULL
6841 || type
->map_type() != NULL
6842 || type
->channel_type() != NULL
)
6843 return TRAVERSE_SKIP_COMPONENTS
;
6845 // For an interface, a reference to the type in a method type should
6846 // be ignored, but we have to consider direct inheritance. When
6847 // this is called, there may be cases of direct inheritance
6848 // represented as a method with no name.
6849 if (type
->interface_type() != NULL
)
6851 const Typed_identifier_list
* methods
= type
->interface_type()->methods();
6852 if (methods
!= NULL
)
6854 for (Typed_identifier_list::const_iterator p
= methods
->begin();
6855 p
!= methods
->end();
6858 if (p
->name().empty())
6860 if (Type::traverse(p
->type(), this) == TRAVERSE_EXIT
)
6861 return TRAVERSE_EXIT
;
6865 return TRAVERSE_SKIP_COMPONENTS
;
6868 return TRAVERSE_CONTINUE
;
6871 // Verify that a named type does not refer to itself.
6874 Named_type::do_verify()
6876 Find_type_use
find(this);
6877 Type::traverse(this->type_
, &find
);
6880 error_at(this->location_
, "invalid recursive type %qs",
6881 this->message_name().c_str());
6882 this->is_error_
= true;
6886 // Check whether any of the local methods overloads an existing
6887 // struct field or interface method. We don't need to check the
6888 // list of methods against itself: that is handled by the Bindings
6890 if (this->local_methods_
!= NULL
)
6892 Struct_type
* st
= this->type_
->struct_type();
6893 Interface_type
* it
= this->type_
->interface_type();
6894 bool found_dup
= false;
6895 if (st
!= NULL
|| it
!= NULL
)
6897 for (Bindings::const_declarations_iterator p
=
6898 this->local_methods_
->begin_declarations();
6899 p
!= this->local_methods_
->end_declarations();
6902 const std::string
& name(p
->first
);
6903 if (st
!= NULL
&& st
->find_local_field(name
, NULL
) != NULL
)
6905 error_at(p
->second
->location(),
6906 "method %qs redeclares struct field name",
6907 Gogo::message_name(name
).c_str());
6910 if (it
!= NULL
&& it
->find_method(name
) != NULL
)
6912 error_at(p
->second
->location(),
6913 "method %qs redeclares interface method name",
6914 Gogo::message_name(name
).c_str());
6923 // If this is a struct, then if any of the fields of the struct
6924 // themselves have struct type, then this struct must be converted
6925 // to the backend representation before the field's type is
6926 // converted. That may seem backward, but it works because if the
6927 // field's type refers to this one, e.g., via a pointer, then the
6928 // conversion process will pick up the half-built struct and do the
6930 if (this->struct_type() != NULL
)
6932 const Struct_field_list
* fields
= this->struct_type()->fields();
6933 for (Struct_field_list::const_iterator p
= fields
->begin();
6937 Struct_type
* st
= p
->type()->struct_type();
6939 st
->add_prerequisite(this);
6946 // Return whether this type is or contains a pointer.
6949 Named_type::do_has_pointer() const
6951 if (this->seen_
> 0)
6954 bool ret
= this->type_
->has_pointer();
6959 // Return a hash code. This is used for method lookup. We simply
6960 // hash on the name itself.
6963 Named_type::do_hash_for_method(Gogo
* gogo
) const
6965 const std::string
& name(this->named_object()->name());
6966 unsigned int ret
= Type::hash_string(name
, 0);
6968 // GOGO will be NULL here when called from Type_hash_identical.
6969 // That is OK because that is only used for internal hash tables
6970 // where we are going to be comparing named types for equality. In
6971 // other cases, which are cases where the runtime is going to
6972 // compare hash codes to see if the types are the same, we need to
6973 // include the package prefix and name in the hash.
6974 if (gogo
!= NULL
&& !Gogo::is_hidden_name(name
) && !this->is_builtin())
6976 const Package
* package
= this->named_object()->package();
6977 if (package
== NULL
)
6979 ret
= Type::hash_string(gogo
->unique_prefix(), ret
);
6980 ret
= Type::hash_string(gogo
->package_name(), ret
);
6984 ret
= Type::hash_string(package
->unique_prefix(), ret
);
6985 ret
= Type::hash_string(package
->name(), ret
);
6992 // Get a tree for a named type.
6995 Named_type::do_get_tree(Gogo
* gogo
)
6997 if (this->is_error_
)
6998 return error_mark_node
;
7000 // Go permits types to refer to themselves in various ways. Break
7001 // the recursion here.
7003 switch (this->type_
->forwarded()->classification())
7006 return error_mark_node
;
7015 // These types can not refer to themselves.
7018 // All maps and channels have the same type in GENERIC.
7019 t
= Type::get_named_type_tree(gogo
, this->type_
);
7020 if (t
== error_mark_node
)
7021 return error_mark_node
;
7022 // Build a copy to set TYPE_NAME.
7023 t
= build_variant_type_copy(t
);
7027 // GENERIC can't handle a pointer to a function type whose
7028 // return type is a pointer to the function type itself. It
7029 // goes into an infinite loop when walking the types.
7030 if (this->seen_
> 0)
7032 Function_type
* fntype
= this->type_
->function_type();
7033 if (fntype
->results() != NULL
7034 && fntype
->results()->size() == 1
7035 && fntype
->results()->front().type()->forwarded() == this)
7036 return ptr_type_node
;
7038 // We can legitimately see ourselves here twice when a named
7039 // type is defined using a struct which refers to the named
7040 // type. If we see ourselves too often we are in a loop.
7041 if (this->seen_
> 3)
7042 return ptr_type_node
;
7045 t
= Type::get_named_type_tree(gogo
, this->type_
);
7047 if (t
== error_mark_node
)
7048 return error_mark_node
;
7049 t
= build_variant_type_copy(t
);
7053 // Don't recur infinitely if a pointer type refers to itself.
7054 // Ideally we would build a circular data structure here, but
7055 // GENERIC can't handle them.
7056 if (this->seen_
> 0)
7058 if (this->type_
->points_to()->forwarded() == this)
7059 return ptr_type_node
;
7061 if (this->seen_
> 3)
7062 return ptr_type_node
;
7065 t
= Type::get_named_type_tree(gogo
, this->type_
);
7067 if (t
== error_mark_node
)
7068 return error_mark_node
;
7069 t
= build_variant_type_copy(t
);
7073 // If there are structs which must be converted first, do them.
7074 if (this->seen_
== 0)
7077 this->type_
->struct_type()->convert_prerequisites(gogo
);
7081 if (this->named_tree_
!= NULL_TREE
)
7082 return this->named_tree_
;
7084 t
= make_node(RECORD_TYPE
);
7085 this->named_tree_
= t
;
7086 t
= this->type_
->struct_type()->fill_in_tree(gogo
, t
);
7087 if (t
== error_mark_node
)
7088 return error_mark_node
;
7092 if (!this->is_open_array_type())
7093 t
= Type::get_named_type_tree(gogo
, this->type_
);
7096 if (this->named_tree_
!= NULL_TREE
)
7097 return this->named_tree_
;
7098 t
= gogo
->slice_type_tree(void_type_node
);
7099 this->named_tree_
= t
;
7100 t
= this->type_
->array_type()->fill_in_tree(gogo
, t
);
7102 if (t
== error_mark_node
)
7103 return error_mark_node
;
7104 t
= build_variant_type_copy(t
);
7107 case TYPE_INTERFACE
:
7108 if (this->type_
->interface_type()->is_empty())
7110 t
= Type::get_named_type_tree(gogo
, this->type_
);
7111 if (t
== error_mark_node
)
7112 return error_mark_node
;
7113 t
= build_variant_type_copy(t
);
7117 if (this->named_tree_
!= NULL_TREE
)
7118 return this->named_tree_
;
7119 t
= make_node(RECORD_TYPE
);
7120 this->named_tree_
= t
;
7121 t
= this->type_
->interface_type()->fill_in_tree(gogo
, t
);
7122 if (t
== error_mark_node
)
7123 return error_mark_node
;
7129 // When a named type T1 is defined as another named type T2,
7130 // the definition must simply be "type T1 T2". If the
7131 // definition of T2 may refer to T1, then we must simply
7132 // return the type for T2 here. It's not precisely correct,
7133 // but it's as close as we can get with GENERIC.
7135 t
= Type::get_named_type_tree(gogo
, this->type_
);
7137 if (this->seen_
> 0)
7139 if (t
== error_mark_node
)
7140 return error_mark_node
;
7141 t
= build_variant_type_copy(t
);
7146 // An undefined forwarding type. Make sure the error is
7148 this->type_
->forward_declaration_type()->real_type();
7149 return error_mark_node
;
7153 case TYPE_CALL_MULTIPLE_RESULT
:
7157 tree id
= this->named_object_
->get_id(gogo
);
7158 tree decl
= build_decl(this->location_
, TYPE_DECL
, id
, t
);
7159 TYPE_NAME(t
) = decl
;
7164 // Build a type descriptor for a named type.
7167 Named_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
7169 // If NAME is not NULL, then we don't really want the type
7170 // descriptor for this type; we want the descriptor for the
7171 // underlying type, giving it the name NAME.
7172 return this->named_type_descriptor(gogo
, this->type_
,
7173 name
== NULL
? this : name
);
7176 // Add to the reflection string. This is used mostly for the name of
7177 // the type used in a type descriptor, not for actual reflection
7181 Named_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
7183 if (this->location() != BUILTINS_LOCATION
)
7185 const Package
* package
= this->named_object_
->package();
7186 if (package
!= NULL
)
7187 ret
->append(package
->name());
7189 ret
->append(gogo
->package_name());
7190 ret
->push_back('.');
7192 if (this->in_function_
!= NULL
)
7194 ret
->append(Gogo::unpack_hidden_name(this->in_function_
->name()));
7195 ret
->push_back('$');
7197 ret
->append(Gogo::unpack_hidden_name(this->named_object_
->name()));
7200 // Get the mangled name.
7203 Named_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
7205 Named_object
* no
= this->named_object_
;
7207 if (this->location() == BUILTINS_LOCATION
)
7208 gcc_assert(this->in_function_
== NULL
);
7211 const std::string
& unique_prefix(no
->package() == NULL
7212 ? gogo
->unique_prefix()
7213 : no
->package()->unique_prefix());
7214 const std::string
& package_name(no
->package() == NULL
7215 ? gogo
->package_name()
7216 : no
->package()->name());
7217 name
= unique_prefix
;
7218 name
.append(1, '.');
7219 name
.append(package_name
);
7220 name
.append(1, '.');
7221 if (this->in_function_
!= NULL
)
7223 name
.append(Gogo::unpack_hidden_name(this->in_function_
->name()));
7224 name
.append(1, '$');
7227 name
.append(Gogo::unpack_hidden_name(no
->name()));
7229 snprintf(buf
, sizeof buf
, "N%u_", static_cast<unsigned int>(name
.length()));
7234 // Export the type. This is called to export a global type.
7237 Named_type::export_named_type(Export
* exp
, const std::string
&) const
7239 // We don't need to write the name of the type here, because it will
7240 // be written by Export::write_type anyhow.
7241 exp
->write_c_string("type ");
7242 exp
->write_type(this);
7243 exp
->write_c_string(";\n");
7246 // Import a named type.
7249 Named_type::import_named_type(Import
* imp
, Named_type
** ptype
)
7251 imp
->require_c_string("type ");
7252 Type
*type
= imp
->read_type();
7253 *ptype
= type
->named_type();
7254 gcc_assert(*ptype
!= NULL
);
7255 imp
->require_c_string(";\n");
7258 // Export the type when it is referenced by another type. In this
7259 // case Export::export_type will already have issued the name.
7262 Named_type::do_export(Export
* exp
) const
7264 exp
->write_type(this->type_
);
7266 // To save space, we only export the methods directly attached to
7268 Bindings
* methods
= this->local_methods_
;
7269 if (methods
== NULL
)
7272 exp
->write_c_string("\n");
7273 for (Bindings::const_definitions_iterator p
= methods
->begin_definitions();
7274 p
!= methods
->end_definitions();
7277 exp
->write_c_string(" ");
7278 (*p
)->export_named_object(exp
);
7281 for (Bindings::const_declarations_iterator p
= methods
->begin_declarations();
7282 p
!= methods
->end_declarations();
7285 if (p
->second
->is_function_declaration())
7287 exp
->write_c_string(" ");
7288 p
->second
->export_named_object(exp
);
7293 // Make a named type.
7296 Type::make_named_type(Named_object
* named_object
, Type
* type
,
7297 source_location location
)
7299 return new Named_type(named_object
, type
, location
);
7302 // Finalize the methods for TYPE. It will be a named type or a struct
7303 // type. This sets *ALL_METHODS to the list of methods, and builds
7304 // all required stubs.
7307 Type::finalize_methods(Gogo
* gogo
, const Type
* type
, source_location location
,
7308 Methods
** all_methods
)
7310 *all_methods
= NULL
;
7311 Types_seen types_seen
;
7312 Type::add_methods_for_type(type
, NULL
, 0, false, false, &types_seen
,
7314 Type::build_stub_methods(gogo
, type
, *all_methods
, location
);
7317 // Add the methods for TYPE to *METHODS. FIELD_INDEXES is used to
7318 // build up the struct field indexes as we go. DEPTH is the depth of
7319 // the field within TYPE. IS_EMBEDDED_POINTER is true if we are
7320 // adding these methods for an anonymous field with pointer type.
7321 // NEEDS_STUB_METHOD is true if we need to use a stub method which
7322 // calls the real method. TYPES_SEEN is used to avoid infinite
7326 Type::add_methods_for_type(const Type
* type
,
7327 const Method::Field_indexes
* field_indexes
,
7329 bool is_embedded_pointer
,
7330 bool needs_stub_method
,
7331 Types_seen
* types_seen
,
7334 // Pointer types may not have methods.
7335 if (type
->points_to() != NULL
)
7338 const Named_type
* nt
= type
->named_type();
7341 std::pair
<Types_seen::iterator
, bool> ins
= types_seen
->insert(nt
);
7347 Type::add_local_methods_for_type(nt
, field_indexes
, depth
,
7348 is_embedded_pointer
, needs_stub_method
,
7351 Type::add_embedded_methods_for_type(type
, field_indexes
, depth
,
7352 is_embedded_pointer
, needs_stub_method
,
7353 types_seen
, methods
);
7355 // If we are called with depth > 0, then we are looking at an
7356 // anonymous field of a struct. If such a field has interface type,
7357 // then we need to add the interface methods. We don't want to add
7358 // them when depth == 0, because we will already handle them
7359 // following the usual rules for an interface type.
7361 Type::add_interface_methods_for_type(type
, field_indexes
, depth
, methods
);
7364 // Add the local methods for the named type NT to *METHODS. The
7365 // parameters are as for add_methods_to_type.
7368 Type::add_local_methods_for_type(const Named_type
* nt
,
7369 const Method::Field_indexes
* field_indexes
,
7371 bool is_embedded_pointer
,
7372 bool needs_stub_method
,
7375 const Bindings
* local_methods
= nt
->local_methods();
7376 if (local_methods
== NULL
)
7379 if (*methods
== NULL
)
7380 *methods
= new Methods();
7382 for (Bindings::const_declarations_iterator p
=
7383 local_methods
->begin_declarations();
7384 p
!= local_methods
->end_declarations();
7387 Named_object
* no
= p
->second
;
7388 bool is_value_method
= (is_embedded_pointer
7389 || !Type::method_expects_pointer(no
));
7390 Method
* m
= new Named_method(no
, field_indexes
, depth
, is_value_method
,
7392 || (depth
> 0 && is_value_method
)));
7393 if (!(*methods
)->insert(no
->name(), m
))
7398 // Add the embedded methods for TYPE to *METHODS. These are the
7399 // methods attached to anonymous fields. The parameters are as for
7400 // add_methods_to_type.
7403 Type::add_embedded_methods_for_type(const Type
* type
,
7404 const Method::Field_indexes
* field_indexes
,
7406 bool is_embedded_pointer
,
7407 bool needs_stub_method
,
7408 Types_seen
* types_seen
,
7411 // Look for anonymous fields in TYPE. TYPE has fields if it is a
7413 const Struct_type
* st
= type
->struct_type();
7417 const Struct_field_list
* fields
= st
->fields();
7422 for (Struct_field_list::const_iterator pf
= fields
->begin();
7423 pf
!= fields
->end();
7426 if (!pf
->is_anonymous())
7429 Type
* ftype
= pf
->type();
7430 bool is_pointer
= false;
7431 if (ftype
->points_to() != NULL
)
7433 ftype
= ftype
->points_to();
7436 Named_type
* fnt
= ftype
->named_type();
7439 // This is an error, but it will be diagnosed elsewhere.
7443 Method::Field_indexes
* sub_field_indexes
= new Method::Field_indexes();
7444 sub_field_indexes
->next
= field_indexes
;
7445 sub_field_indexes
->field_index
= i
;
7447 Type::add_methods_for_type(fnt
, sub_field_indexes
, depth
+ 1,
7448 (is_embedded_pointer
|| is_pointer
),
7457 // If TYPE is an interface type, then add its method to *METHODS.
7458 // This is for interface methods attached to an anonymous field. The
7459 // parameters are as for add_methods_for_type.
7462 Type::add_interface_methods_for_type(const Type
* type
,
7463 const Method::Field_indexes
* field_indexes
,
7467 const Interface_type
* it
= type
->interface_type();
7471 const Typed_identifier_list
* imethods
= it
->methods();
7472 if (imethods
== NULL
)
7475 if (*methods
== NULL
)
7476 *methods
= new Methods();
7478 for (Typed_identifier_list::const_iterator pm
= imethods
->begin();
7479 pm
!= imethods
->end();
7482 Function_type
* fntype
= pm
->type()->function_type();
7483 gcc_assert(fntype
!= NULL
&& !fntype
->is_method());
7484 fntype
= fntype
->copy_with_receiver(const_cast<Type
*>(type
));
7485 Method
* m
= new Interface_method(pm
->name(), pm
->location(), fntype
,
7486 field_indexes
, depth
);
7487 if (!(*methods
)->insert(pm
->name(), m
))
7492 // Build stub methods for TYPE as needed. METHODS is the set of
7493 // methods for the type. A stub method may be needed when a type
7494 // inherits a method from an anonymous field. When we need the
7495 // address of the method, as in a type descriptor, we need to build a
7496 // little stub which does the required field dereferences and jumps to
7497 // the real method. LOCATION is the location of the type definition.
7500 Type::build_stub_methods(Gogo
* gogo
, const Type
* type
, const Methods
* methods
,
7501 source_location location
)
7503 if (methods
== NULL
)
7505 for (Methods::const_iterator p
= methods
->begin();
7506 p
!= methods
->end();
7509 Method
* m
= p
->second
;
7510 if (m
->is_ambiguous() || !m
->needs_stub_method())
7513 const std::string
& name(p
->first
);
7515 // Build a stub method.
7517 const Function_type
* fntype
= m
->type();
7519 static unsigned int counter
;
7521 snprintf(buf
, sizeof buf
, "$this%u", counter
);
7524 Type
* receiver_type
= const_cast<Type
*>(type
);
7525 if (!m
->is_value_method())
7526 receiver_type
= Type::make_pointer_type(receiver_type
);
7527 source_location receiver_location
= m
->receiver_location();
7528 Typed_identifier
* receiver
= new Typed_identifier(buf
, receiver_type
,
7531 const Typed_identifier_list
* fnparams
= fntype
->parameters();
7532 Typed_identifier_list
* stub_params
;
7533 if (fnparams
== NULL
|| fnparams
->empty())
7537 // We give each stub parameter a unique name.
7538 stub_params
= new Typed_identifier_list();
7539 for (Typed_identifier_list::const_iterator pp
= fnparams
->begin();
7540 pp
!= fnparams
->end();
7544 snprintf(pbuf
, sizeof pbuf
, "$p%u", counter
);
7545 stub_params
->push_back(Typed_identifier(pbuf
, pp
->type(),
7551 const Typed_identifier_list
* fnresults
= fntype
->results();
7552 Typed_identifier_list
* stub_results
;
7553 if (fnresults
== NULL
|| fnresults
->empty())
7554 stub_results
= NULL
;
7557 // We create the result parameters without any names, since
7558 // we won't refer to them.
7559 stub_results
= new Typed_identifier_list();
7560 for (Typed_identifier_list::const_iterator pr
= fnresults
->begin();
7561 pr
!= fnresults
->end();
7563 stub_results
->push_back(Typed_identifier("", pr
->type(),
7567 Function_type
* stub_type
= Type::make_function_type(receiver
,
7570 fntype
->location());
7571 if (fntype
->is_varargs())
7572 stub_type
->set_is_varargs();
7574 // We only create the function in the package which creates the
7576 const Package
* package
;
7577 if (type
->named_type() == NULL
)
7580 package
= type
->named_type()->named_object()->package();
7582 if (package
!= NULL
)
7583 stub
= Named_object::make_function_declaration(name
, package
,
7584 stub_type
, location
);
7587 stub
= gogo
->start_function(name
, stub_type
, false,
7588 fntype
->location());
7589 Type::build_one_stub_method(gogo
, m
, buf
, stub_params
,
7590 fntype
->is_varargs(), location
);
7591 gogo
->finish_function(fntype
->location());
7594 m
->set_stub_object(stub
);
7598 // Build a stub method which adjusts the receiver as required to call
7599 // METHOD. RECEIVER_NAME is the name we used for the receiver.
7600 // PARAMS is the list of function parameters.
7603 Type::build_one_stub_method(Gogo
* gogo
, Method
* method
,
7604 const char* receiver_name
,
7605 const Typed_identifier_list
* params
,
7607 source_location location
)
7609 Named_object
* receiver_object
= gogo
->lookup(receiver_name
, NULL
);
7610 gcc_assert(receiver_object
!= NULL
);
7612 Expression
* expr
= Expression::make_var_reference(receiver_object
, location
);
7613 expr
= Type::apply_field_indexes(expr
, method
->field_indexes(), location
);
7614 if (expr
->type()->points_to() == NULL
)
7615 expr
= Expression::make_unary(OPERATOR_AND
, expr
, location
);
7617 Expression_list
* arguments
;
7618 if (params
== NULL
|| params
->empty())
7622 arguments
= new Expression_list();
7623 for (Typed_identifier_list::const_iterator p
= params
->begin();
7627 Named_object
* param
= gogo
->lookup(p
->name(), NULL
);
7628 gcc_assert(param
!= NULL
);
7629 Expression
* param_ref
= Expression::make_var_reference(param
,
7631 arguments
->push_back(param_ref
);
7635 Expression
* func
= method
->bind_method(expr
, location
);
7636 gcc_assert(func
!= NULL
);
7637 Call_expression
* call
= Expression::make_call(func
, arguments
, is_varargs
,
7639 size_t count
= call
->result_count();
7641 gogo
->add_statement(Statement::make_statement(call
));
7644 Expression_list
* retvals
= new Expression_list();
7646 retvals
->push_back(call
);
7649 for (size_t i
= 0; i
< count
; ++i
)
7650 retvals
->push_back(Expression::make_call_result(call
, i
));
7652 const Function
* function
= gogo
->current_function()->func_value();
7653 const Typed_identifier_list
* results
= function
->type()->results();
7654 Statement
* retstat
= Statement::make_return_statement(results
, retvals
,
7656 gogo
->add_statement(retstat
);
7660 // Apply FIELD_INDEXES to EXPR. The field indexes have to be applied
7661 // in reverse order.
7664 Type::apply_field_indexes(Expression
* expr
,
7665 const Method::Field_indexes
* field_indexes
,
7666 source_location location
)
7668 if (field_indexes
== NULL
)
7670 expr
= Type::apply_field_indexes(expr
, field_indexes
->next
, location
);
7671 Struct_type
* stype
= expr
->type()->deref()->struct_type();
7672 gcc_assert(stype
!= NULL
7673 && field_indexes
->field_index
< stype
->field_count());
7674 if (expr
->type()->struct_type() == NULL
)
7676 gcc_assert(expr
->type()->points_to() != NULL
);
7677 expr
= Expression::make_unary(OPERATOR_MULT
, expr
, location
);
7678 gcc_assert(expr
->type()->struct_type() == stype
);
7680 return Expression::make_field_reference(expr
, field_indexes
->field_index
,
7684 // Return whether NO is a method for which the receiver is a pointer.
7687 Type::method_expects_pointer(const Named_object
* no
)
7689 const Function_type
*fntype
;
7690 if (no
->is_function())
7691 fntype
= no
->func_value()->type();
7692 else if (no
->is_function_declaration())
7693 fntype
= no
->func_declaration_value()->type();
7696 return fntype
->receiver()->type()->points_to() != NULL
;
7699 // Given a set of methods for a type, METHODS, return the method NAME,
7700 // or NULL if there isn't one or if it is ambiguous. If IS_AMBIGUOUS
7701 // is not NULL, then set *IS_AMBIGUOUS to true if the method exists
7702 // but is ambiguous (and return NULL).
7705 Type::method_function(const Methods
* methods
, const std::string
& name
,
7708 if (is_ambiguous
!= NULL
)
7709 *is_ambiguous
= false;
7710 if (methods
== NULL
)
7712 Methods::const_iterator p
= methods
->find(name
);
7713 if (p
== methods
->end())
7715 Method
* m
= p
->second
;
7716 if (m
->is_ambiguous())
7718 if (is_ambiguous
!= NULL
)
7719 *is_ambiguous
= true;
7725 // Look for field or method NAME for TYPE. Return an Expression for
7726 // the field or method bound to EXPR. If there is no such field or
7727 // method, give an appropriate error and return an error expression.
7730 Type::bind_field_or_method(Gogo
* gogo
, const Type
* type
, Expression
* expr
,
7731 const std::string
& name
,
7732 source_location location
)
7734 if (type
->deref()->is_error_type())
7735 return Expression::make_error(location
);
7737 const Named_type
* nt
= type
->named_type();
7739 nt
= type
->deref()->named_type();
7740 const Struct_type
* st
= type
->deref()->struct_type();
7741 const Interface_type
* it
= type
->deref()->interface_type();
7743 // If this is a pointer to a pointer, then it is possible that the
7744 // pointed-to type has methods.
7748 && type
->points_to() != NULL
7749 && type
->points_to()->points_to() != NULL
)
7751 expr
= Expression::make_unary(OPERATOR_MULT
, expr
, location
);
7752 type
= type
->points_to();
7753 nt
= type
->points_to()->named_type();
7754 st
= type
->points_to()->struct_type();
7755 it
= type
->points_to()->interface_type();
7758 bool receiver_can_be_pointer
= (expr
->type()->points_to() != NULL
7759 || expr
->is_addressable());
7760 std::vector
<const Named_type
*> seen
;
7761 bool is_method
= false;
7762 bool found_pointer_method
= false;
7765 if (Type::find_field_or_method(type
, name
, receiver_can_be_pointer
,
7766 &seen
, NULL
, &is_method
,
7767 &found_pointer_method
, &ambig1
, &ambig2
))
7772 gcc_assert(st
!= NULL
);
7773 if (type
->struct_type() == NULL
)
7775 gcc_assert(type
->points_to() != NULL
);
7776 expr
= Expression::make_unary(OPERATOR_MULT
, expr
,
7778 gcc_assert(expr
->type()->struct_type() == st
);
7780 ret
= st
->field_reference(expr
, name
, location
);
7782 else if (it
!= NULL
&& it
->find_method(name
) != NULL
)
7783 ret
= Expression::make_interface_field_reference(expr
, name
,
7789 m
= nt
->method_function(name
, NULL
);
7790 else if (st
!= NULL
)
7791 m
= st
->method_function(name
, NULL
);
7794 gcc_assert(m
!= NULL
);
7795 if (!m
->is_value_method() && expr
->type()->points_to() == NULL
)
7796 expr
= Expression::make_unary(OPERATOR_AND
, expr
, location
);
7797 ret
= m
->bind_method(expr
, location
);
7799 gcc_assert(ret
!= NULL
);
7804 if (!ambig1
.empty())
7805 error_at(location
, "%qs is ambiguous via %qs and %qs",
7806 Gogo::message_name(name
).c_str(),
7807 Gogo::message_name(ambig1
).c_str(),
7808 Gogo::message_name(ambig2
).c_str());
7809 else if (found_pointer_method
)
7810 error_at(location
, "method requires a pointer");
7811 else if (nt
== NULL
&& st
== NULL
&& it
== NULL
)
7813 ("reference to field %qs in object which "
7814 "has no fields or methods"),
7815 Gogo::message_name(name
).c_str());
7819 if (!Gogo::is_hidden_name(name
))
7820 is_unexported
= false;
7823 std::string unpacked
= Gogo::unpack_hidden_name(name
);
7825 is_unexported
= Type::is_unexported_field_or_method(gogo
, type
,
7830 error_at(location
, "reference to unexported field or method %qs",
7831 Gogo::message_name(name
).c_str());
7833 error_at(location
, "reference to undefined field or method %qs",
7834 Gogo::message_name(name
).c_str());
7836 return Expression::make_error(location
);
7840 // Look in TYPE for a field or method named NAME, return true if one
7841 // is found. This looks through embedded anonymous fields and handles
7842 // ambiguity. If a method is found, sets *IS_METHOD to true;
7843 // otherwise, if a field is found, set it to false. If
7844 // RECEIVER_CAN_BE_POINTER is false, then the receiver is a value
7845 // whose address can not be taken. SEEN is used to avoid infinite
7846 // recursion on invalid types.
7848 // When returning false, this sets *FOUND_POINTER_METHOD if we found a
7849 // method we couldn't use because it requires a pointer. LEVEL is
7850 // used for recursive calls, and can be NULL for a non-recursive call.
7851 // When this function returns false because it finds that the name is
7852 // ambiguous, it will store a path to the ambiguous names in *AMBIG1
7853 // and *AMBIG2. If the name is not found at all, *AMBIG1 and *AMBIG2
7854 // will be unchanged.
7856 // This function just returns whether or not there is a field or
7857 // method, and whether it is a field or method. It doesn't build an
7858 // expression to refer to it. If it is a method, we then look in the
7859 // list of all methods for the type. If it is a field, the search has
7860 // to be done again, looking only for fields, and building up the
7861 // expression as we go.
7864 Type::find_field_or_method(const Type
* type
,
7865 const std::string
& name
,
7866 bool receiver_can_be_pointer
,
7867 std::vector
<const Named_type
*>* seen
,
7870 bool* found_pointer_method
,
7871 std::string
* ambig1
,
7872 std::string
* ambig2
)
7874 // Named types can have locally defined methods.
7875 const Named_type
* nt
= type
->named_type();
7876 if (nt
== NULL
&& type
->points_to() != NULL
)
7877 nt
= type
->points_to()->named_type();
7880 Named_object
* no
= nt
->find_local_method(name
);
7883 if (receiver_can_be_pointer
|| !Type::method_expects_pointer(no
))
7889 // Record that we have found a pointer method in order to
7890 // give a better error message if we don't find anything
7892 *found_pointer_method
= true;
7895 for (std::vector
<const Named_type
*>::const_iterator p
= seen
->begin();
7901 // We've already seen this type when searching for methods.
7907 // Interface types can have methods.
7908 const Interface_type
* it
= type
->deref()->interface_type();
7909 if (it
!= NULL
&& it
->find_method(name
) != NULL
)
7915 // Struct types can have fields. They can also inherit fields and
7916 // methods from anonymous fields.
7917 const Struct_type
* st
= type
->deref()->struct_type();
7920 const Struct_field_list
* fields
= st
->fields();
7925 seen
->push_back(nt
);
7927 int found_level
= 0;
7928 bool found_is_method
= false;
7929 std::string found_ambig1
;
7930 std::string found_ambig2
;
7931 const Struct_field
* found_parent
= NULL
;
7932 for (Struct_field_list::const_iterator pf
= fields
->begin();
7933 pf
!= fields
->end();
7936 if (pf
->field_name() == name
)
7944 if (!pf
->is_anonymous())
7947 if (pf
->type()->deref()->is_error_type()
7948 || pf
->type()->deref()->is_undefined())
7951 Named_type
* fnt
= pf
->type()->named_type();
7953 fnt
= pf
->type()->deref()->named_type();
7954 gcc_assert(fnt
!= NULL
);
7956 int sublevel
= level
== NULL
? 1 : *level
+ 1;
7958 std::string subambig1
;
7959 std::string subambig2
;
7960 bool subfound
= Type::find_field_or_method(fnt
,
7962 receiver_can_be_pointer
,
7966 found_pointer_method
,
7971 if (!subambig1
.empty())
7973 // The name was found via this field, but is ambiguous.
7974 // if the ambiguity is lower or at the same level as
7975 // anything else we have already found, then we want to
7976 // pass the ambiguity back to the caller.
7977 if (found_level
== 0 || sublevel
<= found_level
)
7979 found_ambig1
= pf
->field_name() + '.' + subambig1
;
7980 found_ambig2
= pf
->field_name() + '.' + subambig2
;
7981 found_level
= sublevel
;
7987 // The name was found via this field. Use the level to see
7988 // if we want to use this one, or whether it introduces an
7990 if (found_level
== 0 || sublevel
< found_level
)
7992 found_level
= sublevel
;
7993 found_is_method
= sub_is_method
;
7994 found_ambig1
.clear();
7995 found_ambig2
.clear();
7996 found_parent
= &*pf
;
7998 else if (sublevel
> found_level
)
8000 else if (found_ambig1
.empty())
8002 // We found an ambiguity.
8003 gcc_assert(found_parent
!= NULL
);
8004 found_ambig1
= found_parent
->field_name();
8005 found_ambig2
= pf
->field_name();
8009 // We found an ambiguity, but we already know of one.
8010 // Just report the earlier one.
8015 // Here if we didn't find anything FOUND_LEVEL is 0. If we found
8016 // something ambiguous, FOUND_LEVEL is not 0 and FOUND_AMBIG1 and
8017 // FOUND_AMBIG2 are not empty. If we found the field, FOUND_LEVEL
8018 // is not 0 and FOUND_AMBIG1 and FOUND_AMBIG2 are empty.
8023 if (found_level
== 0)
8025 else if (!found_ambig1
.empty())
8027 gcc_assert(!found_ambig1
.empty());
8028 ambig1
->assign(found_ambig1
);
8029 ambig2
->assign(found_ambig2
);
8031 *level
= found_level
;
8037 *level
= found_level
;
8038 *is_method
= found_is_method
;
8043 // Return whether NAME is an unexported field or method for TYPE.
8046 Type::is_unexported_field_or_method(Gogo
* gogo
, const Type
* type
,
8047 const std::string
& name
,
8048 std::vector
<const Named_type
*>* seen
)
8050 type
= type
->deref();
8052 const Named_type
* nt
= type
->named_type();
8055 if (nt
->is_unexported_local_method(gogo
, name
))
8058 for (std::vector
<const Named_type
*>::const_iterator p
= seen
->begin();
8064 // We've already seen this type.
8070 const Interface_type
* it
= type
->interface_type();
8071 if (it
!= NULL
&& it
->is_unexported_method(gogo
, name
))
8074 const Struct_type
* st
= type
->struct_type();
8075 if (st
!= NULL
&& st
->is_unexported_local_field(gogo
, name
))
8081 const Struct_field_list
* fields
= st
->fields();
8086 seen
->push_back(nt
);
8088 for (Struct_field_list::const_iterator pf
= fields
->begin();
8089 pf
!= fields
->end();
8092 if (pf
->is_anonymous()
8093 && (!pf
->type()->deref()->is_error_type()
8094 && !pf
->type()->deref()->is_undefined()))
8096 Named_type
* subtype
= pf
->type()->deref()->named_type();
8097 gcc_assert(subtype
!= NULL
);
8098 if (Type::is_unexported_field_or_method(gogo
, subtype
, name
, seen
))
8113 // Class Forward_declaration.
8115 Forward_declaration_type::Forward_declaration_type(Named_object
* named_object
)
8116 : Type(TYPE_FORWARD
),
8117 named_object_(named_object
->resolve()), warned_(false)
8119 gcc_assert(this->named_object_
->is_unknown()
8120 || this->named_object_
->is_type_declaration());
8123 // Return the named object.
8126 Forward_declaration_type::named_object()
8128 return this->named_object_
->resolve();
8132 Forward_declaration_type::named_object() const
8134 return this->named_object_
->resolve();
8137 // Return the name of the forward declared type.
8140 Forward_declaration_type::name() const
8142 return this->named_object()->name();
8145 // Warn about a use of a type which has been declared but not defined.
8148 Forward_declaration_type::warn() const
8150 Named_object
* no
= this->named_object_
->resolve();
8151 if (no
->is_unknown())
8153 // The name was not defined anywhere.
8156 error_at(this->named_object_
->location(),
8157 "use of undefined type %qs",
8158 no
->message_name().c_str());
8159 this->warned_
= true;
8162 else if (no
->is_type_declaration())
8164 // The name was seen as a type, but the type was never defined.
8165 if (no
->type_declaration_value()->using_type())
8167 error_at(this->named_object_
->location(),
8168 "use of undefined type %qs",
8169 no
->message_name().c_str());
8170 this->warned_
= true;
8175 // The name was defined, but not as a type.
8178 error_at(this->named_object_
->location(), "expected type");
8179 this->warned_
= true;
8184 // Get the base type of a declaration. This gives an error if the
8185 // type has not yet been defined.
8188 Forward_declaration_type::real_type()
8190 if (this->is_defined())
8191 return this->named_object()->type_value();
8195 return Type::make_error_type();
8200 Forward_declaration_type::real_type() const
8202 if (this->is_defined())
8203 return this->named_object()->type_value();
8207 return Type::make_error_type();
8211 // Return whether the base type is defined.
8214 Forward_declaration_type::is_defined() const
8216 return this->named_object()->is_type();
8219 // Add a method. This is used when methods are defined before the
8223 Forward_declaration_type::add_method(const std::string
& name
,
8226 Named_object
* no
= this->named_object();
8227 if (no
->is_unknown())
8228 no
->declare_as_type();
8229 return no
->type_declaration_value()->add_method(name
, function
);
8232 // Add a method declaration. This is used when methods are declared
8236 Forward_declaration_type::add_method_declaration(const std::string
& name
,
8237 Function_type
* type
,
8238 source_location location
)
8240 Named_object
* no
= this->named_object();
8241 if (no
->is_unknown())
8242 no
->declare_as_type();
8243 Type_declaration
* td
= no
->type_declaration_value();
8244 return td
->add_method_declaration(name
, type
, location
);
8250 Forward_declaration_type::do_traverse(Traverse
* traverse
)
8252 if (this->is_defined()
8253 && Type::traverse(this->real_type(), traverse
) == TRAVERSE_EXIT
)
8254 return TRAVERSE_EXIT
;
8255 return TRAVERSE_CONTINUE
;
8258 // Get a tree for the type.
8261 Forward_declaration_type::do_get_tree(Gogo
* gogo
)
8263 if (this->is_defined())
8264 return Type::get_named_type_tree(gogo
, this->real_type());
8267 return error_mark_node
;
8269 // We represent an undefined type as a struct with no fields. That
8270 // should work fine for the middle-end, since the same case can
8272 Named_object
* no
= this->named_object();
8273 tree type_tree
= make_node(RECORD_TYPE
);
8274 tree id
= no
->get_id(gogo
);
8275 tree decl
= build_decl(no
->location(), TYPE_DECL
, id
, type_tree
);
8276 TYPE_NAME(type_tree
) = decl
;
8277 layout_type(type_tree
);
8281 // Build a type descriptor for a forwarded type.
8284 Forward_declaration_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
8286 if (!this->is_defined())
8287 return Expression::make_nil(BUILTINS_LOCATION
);
8290 Type
* t
= this->real_type();
8292 return this->named_type_descriptor(gogo
, t
, name
);
8294 return Expression::make_type_descriptor(t
, BUILTINS_LOCATION
);
8298 // The reflection string.
8301 Forward_declaration_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
8303 this->append_reflection(this->real_type(), gogo
, ret
);
8306 // The mangled name.
8309 Forward_declaration_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
8311 if (this->is_defined())
8312 this->append_mangled_name(this->real_type(), gogo
, ret
);
8315 const Named_object
* no
= this->named_object();
8317 if (no
->package() == NULL
)
8318 name
= gogo
->package_name();
8320 name
= no
->package()->name();
8322 name
+= Gogo::unpack_hidden_name(no
->name());
8324 snprintf(buf
, sizeof buf
, "N%u_",
8325 static_cast<unsigned int>(name
.length()));
8331 // Export a forward declaration. This can happen when a defined type
8332 // refers to a type which is only declared (and is presumably defined
8333 // in some other file in the same package).
8336 Forward_declaration_type::do_export(Export
*) const
8338 // If there is a base type, that should be exported instead of this.
8339 gcc_assert(!this->is_defined());
8341 // We don't output anything.
8344 // Make a forward declaration.
8347 Type::make_forward_declaration(Named_object
* named_object
)
8349 return new Forward_declaration_type(named_object
);
8352 // Class Typed_identifier_list.
8354 // Sort the entries by name.
8356 struct Typed_identifier_list_sort
8360 operator()(const Typed_identifier
& t1
, const Typed_identifier
& t2
) const
8361 { return t1
.name() < t2
.name(); }
8365 Typed_identifier_list::sort_by_name()
8367 std::sort(this->entries_
.begin(), this->entries_
.end(),
8368 Typed_identifier_list_sort());
8374 Typed_identifier_list::traverse(Traverse
* traverse
)
8376 for (Typed_identifier_list::const_iterator p
= this->begin();
8380 if (Type::traverse(p
->type(), traverse
) == TRAVERSE_EXIT
)
8381 return TRAVERSE_EXIT
;
8383 return TRAVERSE_CONTINUE
;
8388 Typed_identifier_list
*
8389 Typed_identifier_list::copy() const
8391 Typed_identifier_list
* ret
= new Typed_identifier_list();
8392 for (Typed_identifier_list::const_iterator p
= this->begin();
8395 ret
->push_back(Typed_identifier(p
->name(), p
->type(), p
->location()));