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
);
409 // Return true if it's OK to have a binary operation with types LHS
410 // and RHS. This is not used for shifts or comparisons.
413 Type::are_compatible_for_binop(const Type
* lhs
, const Type
* rhs
)
415 if (Type::are_identical(lhs
, rhs
, true, NULL
))
418 // A constant of abstract bool type may be mixed with any bool type.
419 if ((rhs
->is_abstract_boolean_type() && lhs
->is_boolean_type())
420 || (lhs
->is_abstract_boolean_type() && rhs
->is_boolean_type()))
423 // A constant of abstract string type may be mixed with any string
425 if ((rhs
->is_abstract_string_type() && lhs
->is_string_type())
426 || (lhs
->is_abstract_string_type() && rhs
->is_string_type()))
432 // A constant of abstract integer, float, or complex type may be
433 // mixed with an integer, float, or complex type.
434 if ((rhs
->is_abstract()
435 && (rhs
->integer_type() != NULL
436 || rhs
->float_type() != NULL
437 || rhs
->complex_type() != NULL
)
438 && (lhs
->integer_type() != NULL
439 || lhs
->float_type() != NULL
440 || lhs
->complex_type() != NULL
))
441 || (lhs
->is_abstract()
442 && (lhs
->integer_type() != NULL
443 || lhs
->float_type() != NULL
444 || lhs
->complex_type() != NULL
)
445 && (rhs
->integer_type() != NULL
446 || rhs
->float_type() != NULL
447 || rhs
->complex_type() != NULL
)))
450 // The nil type may be compared to a pointer, an interface type, a
451 // slice type, a channel type, a map type, or a function type.
452 if (lhs
->is_nil_type()
453 && (rhs
->points_to() != NULL
454 || rhs
->interface_type() != NULL
455 || rhs
->is_open_array_type()
456 || rhs
->map_type() != NULL
457 || rhs
->channel_type() != NULL
458 || rhs
->function_type() != NULL
))
460 if (rhs
->is_nil_type()
461 && (lhs
->points_to() != NULL
462 || lhs
->interface_type() != NULL
463 || lhs
->is_open_array_type()
464 || lhs
->map_type() != NULL
465 || lhs
->channel_type() != NULL
466 || lhs
->function_type() != NULL
))
472 // Return true if a value with type RHS may be assigned to a variable
473 // with type LHS. If REASON is not NULL, set *REASON to the reason
474 // the types are not assignable.
477 Type::are_assignable(const Type
* lhs
, const Type
* rhs
, std::string
* reason
)
479 // Do some checks first. Make sure the types are defined.
480 if (lhs
!= NULL
&& lhs
->forwarded()->forward_declaration_type() == NULL
)
482 // Any value may be assigned to the blank identifier.
483 if (lhs
->is_sink_type())
486 // All fields of a struct must be exported, or the assignment
487 // must be in the same package.
488 if (rhs
!= NULL
&& rhs
->forwarded()->forward_declaration_type() == NULL
)
490 if (lhs
->has_hidden_fields(NULL
, reason
)
491 || rhs
->has_hidden_fields(NULL
, reason
))
496 // Identical types are assignable.
497 if (Type::are_identical(lhs
, rhs
, true, reason
))
500 // The types are assignable if they have identical underlying types
501 // and either LHS or RHS is not a named type.
502 if (((lhs
->named_type() != NULL
&& rhs
->named_type() == NULL
)
503 || (rhs
->named_type() != NULL
&& lhs
->named_type() == NULL
))
504 && Type::are_identical(lhs
->base(), rhs
->base(), true, reason
))
507 // The types are assignable if LHS is an interface type and RHS
508 // implements the required methods.
509 const Interface_type
* lhs_interface_type
= lhs
->interface_type();
510 if (lhs_interface_type
!= NULL
)
512 if (lhs_interface_type
->implements_interface(rhs
, reason
))
514 const Interface_type
* rhs_interface_type
= rhs
->interface_type();
515 if (rhs_interface_type
!= NULL
516 && lhs_interface_type
->is_compatible_for_assign(rhs_interface_type
,
521 // The type are assignable if RHS is a bidirectional channel type,
522 // LHS is a channel type, they have identical element types, and
523 // either LHS or RHS is not a named type.
524 if (lhs
->channel_type() != NULL
525 && rhs
->channel_type() != NULL
526 && rhs
->channel_type()->may_send()
527 && rhs
->channel_type()->may_receive()
528 && (lhs
->named_type() == NULL
|| rhs
->named_type() == NULL
)
529 && Type::are_identical(lhs
->channel_type()->element_type(),
530 rhs
->channel_type()->element_type(),
535 // The nil type may be assigned to a pointer, function, slice, map,
536 // channel, or interface type.
537 if (rhs
->is_nil_type()
538 && (lhs
->points_to() != NULL
539 || lhs
->function_type() != NULL
540 || lhs
->is_open_array_type()
541 || lhs
->map_type() != NULL
542 || lhs
->channel_type() != NULL
543 || lhs
->interface_type() != NULL
))
546 // An untyped numeric constant may be assigned to a numeric type if
547 // it is representable in that type.
548 if ((rhs
->is_abstract()
549 && (rhs
->integer_type() != NULL
550 || rhs
->float_type() != NULL
551 || rhs
->complex_type() != NULL
))
552 && (lhs
->integer_type() != NULL
553 || lhs
->float_type() != NULL
554 || lhs
->complex_type() != NULL
))
557 // Give some better error messages.
558 if (reason
!= NULL
&& reason
->empty())
560 if (rhs
->interface_type() != NULL
)
561 reason
->assign(_("need explicit conversion"));
562 else if (rhs
->is_call_multiple_result_type())
563 reason
->assign(_("multiple value function call in "
564 "single value context"));
565 else if (lhs
->named_type() != NULL
&& rhs
->named_type() != NULL
)
567 size_t len
= (lhs
->named_type()->name().length()
568 + rhs
->named_type()->name().length()
570 char* buf
= new char[len
];
571 snprintf(buf
, len
, _("cannot use type %s as type %s"),
572 rhs
->named_type()->message_name().c_str(),
573 lhs
->named_type()->message_name().c_str());
582 // Return true if a value with type RHS may be converted to type LHS.
583 // If REASON is not NULL, set *REASON to the reason the types are not
587 Type::are_convertible(const Type
* lhs
, const Type
* rhs
, std::string
* reason
)
589 // The types are convertible if they are assignable.
590 if (Type::are_assignable(lhs
, rhs
, reason
))
593 // The types are convertible if they have identical underlying
595 if ((lhs
->named_type() != NULL
|| rhs
->named_type() != NULL
)
596 && Type::are_identical(lhs
->base(), rhs
->base(), true, reason
))
599 // The types are convertible if they are both unnamed pointer types
600 // and their pointer base types have identical underlying types.
601 if (lhs
->named_type() == NULL
602 && rhs
->named_type() == NULL
603 && lhs
->points_to() != NULL
604 && rhs
->points_to() != NULL
605 && (lhs
->points_to()->named_type() != NULL
606 || rhs
->points_to()->named_type() != NULL
)
607 && Type::are_identical(lhs
->points_to()->base(),
608 rhs
->points_to()->base(),
613 // Integer and floating point types are convertible to each other.
614 if ((lhs
->integer_type() != NULL
|| lhs
->float_type() != NULL
)
615 && (rhs
->integer_type() != NULL
|| rhs
->float_type() != NULL
))
618 // Complex types are convertible to each other.
619 if (lhs
->complex_type() != NULL
&& rhs
->complex_type() != NULL
)
622 // An integer, or []byte, or []int, may be converted to a string.
623 if (lhs
->is_string_type())
625 if (rhs
->integer_type() != NULL
)
627 if (rhs
->is_open_array_type() && rhs
->named_type() == NULL
)
629 const Type
* e
= rhs
->array_type()->element_type()->forwarded();
630 if (e
->integer_type() != NULL
631 && (e
== Type::lookup_integer_type("uint8")
632 || e
== Type::lookup_integer_type("int")))
637 // A string may be converted to []byte or []int.
638 if (rhs
->is_string_type()
639 && lhs
->is_open_array_type()
640 && lhs
->named_type() == NULL
)
642 const Type
* e
= lhs
->array_type()->element_type()->forwarded();
643 if (e
->integer_type() != NULL
644 && (e
== Type::lookup_integer_type("uint8")
645 || e
== Type::lookup_integer_type("int")))
649 // An unsafe.Pointer type may be converted to any pointer type or to
650 // uintptr, and vice-versa.
651 if (lhs
->is_unsafe_pointer_type()
652 && (rhs
->points_to() != NULL
653 || (rhs
->integer_type() != NULL
654 && rhs
->forwarded() == Type::lookup_integer_type("uintptr"))))
656 if (rhs
->is_unsafe_pointer_type()
657 && (lhs
->points_to() != NULL
658 || (lhs
->integer_type() != NULL
659 && lhs
->forwarded() == Type::lookup_integer_type("uintptr"))))
662 // Give a better error message.
666 *reason
= "invalid type conversion";
669 std::string s
= "invalid type conversion (";
679 // Return whether this type has any hidden fields. This is only a
680 // possibility for a few types.
683 Type::has_hidden_fields(const Named_type
* within
, std::string
* reason
) const
685 switch (this->forwarded()->classification_
)
688 return this->named_type()->named_type_has_hidden_fields(reason
);
690 return this->struct_type()->struct_has_hidden_fields(within
, reason
);
692 return this->array_type()->array_has_hidden_fields(within
, reason
);
698 // Return a hash code for the type to be used for method lookup.
701 Type::hash_for_method(Gogo
* gogo
) const
703 unsigned int ret
= 0;
704 if (this->classification_
!= TYPE_FORWARD
)
705 ret
+= this->classification_
;
706 return ret
+ this->do_hash_for_method(gogo
);
709 // Default implementation of do_hash_for_method. This is appropriate
710 // for types with no subfields.
713 Type::do_hash_for_method(Gogo
*) const
718 // Return a hash code for a string, given a starting hash.
721 Type::hash_string(const std::string
& s
, unsigned int h
)
723 const char* p
= s
.data();
724 size_t len
= s
.length();
725 for (; len
> 0; --len
)
733 // Default check for the expression passed to make. Any type which
734 // may be used with make implements its own version of this.
737 Type::do_check_make_expression(Expression_list
*, source_location
)
742 // Return whether an expression has an integer value. Report an error
743 // if not. This is used when handling calls to the predeclared make
747 Type::check_int_value(Expression
* e
, const char* errmsg
,
748 source_location location
)
750 if (e
->type()->integer_type() != NULL
)
753 // Check for a floating point constant with integer value.
758 if (e
->float_constant_value(fval
, &dummy
))
765 mpfr_clear_overflow();
766 mpfr_clear_erangeflag();
767 mpfr_get_z(ival
, fval
, GMP_RNDN
);
768 if (!mpfr_overflow_p()
769 && !mpfr_erangeflag_p()
770 && mpz_sgn(ival
) >= 0)
772 Named_type
* ntype
= Type::lookup_integer_type("int");
773 Integer_type
* inttype
= ntype
->integer_type();
775 mpz_init_set_ui(max
, 1);
776 mpz_mul_2exp(max
, max
, inttype
->bits() - 1);
777 ok
= mpz_cmp(ival
, max
) < 0;
791 error_at(location
, "%s", errmsg
);
795 // A hash table mapping unnamed types to trees.
797 Type::Type_trees
Type::type_trees
;
799 // Return a tree representing this type.
802 Type::get_tree(Gogo
* gogo
)
804 if (this->tree_
!= NULL
)
807 if (this->forward_declaration_type() != NULL
808 || this->named_type() != NULL
)
809 return this->get_tree_without_hash(gogo
);
811 if (this->is_error_type())
812 return error_mark_node
;
814 // To avoid confusing GIMPLE, we need to translate all identical Go
815 // types to the same GIMPLE type. We use a hash table to do that.
816 // There is no need to use the hash table for named types, as named
817 // types are only identical to themselves.
819 std::pair
<Type
*, tree
> val(this, NULL
);
820 std::pair
<Type_trees::iterator
, bool> ins
=
821 Type::type_trees
.insert(val
);
822 if (!ins
.second
&& ins
.first
->second
!= NULL_TREE
)
824 this->tree_
= ins
.first
->second
;
828 tree t
= this->get_tree_without_hash(gogo
);
830 if (ins
.first
->second
== NULL_TREE
)
831 ins
.first
->second
= t
;
834 // We have already created a tree for this type. This can
835 // happen when an unnamed type is defined using a named type
836 // which in turns uses an identical unnamed type. Use the tree
837 // we created earlier and ignore the one we just built.
838 t
= ins
.first
->second
;
845 // Return a tree for a type without looking in the hash table for
846 // identical types. This is used for named types, since there is no
847 // point to looking in the hash table for them.
850 Type::get_tree_without_hash(Gogo
* gogo
)
852 if (this->tree_
== NULL_TREE
)
854 tree t
= this->do_get_tree(gogo
);
856 // For a recursive function or pointer type, we will temporarily
857 // return ptr_type_node during the recursion. We don't want to
858 // record that for a forwarding type, as it may confuse us
860 if (t
== ptr_type_node
&& this->forward_declaration_type() != NULL
)
864 go_preserve_from_gc(t
);
870 // Return a tree representing a zero initialization for this type.
873 Type::get_init_tree(Gogo
* gogo
, bool is_clear
)
875 tree type_tree
= this->get_tree(gogo
);
876 if (type_tree
== error_mark_node
)
877 return error_mark_node
;
878 return this->do_get_init_tree(gogo
, type_tree
, is_clear
);
881 // Any type which supports the builtin make function must implement
885 Type::do_make_expression_tree(Translate_context
*, Expression_list
*,
891 // Return a pointer to the type descriptor for this type.
894 Type::type_descriptor_pointer(Gogo
* gogo
)
896 Type
* t
= this->forwarded();
897 if (t
->type_descriptor_decl_
== NULL_TREE
)
899 Expression
* e
= t
->do_type_descriptor(gogo
, NULL
);
900 gogo
->build_type_descriptor_decl(t
, e
, &t
->type_descriptor_decl_
);
901 gcc_assert(t
->type_descriptor_decl_
!= NULL_TREE
902 && (t
->type_descriptor_decl_
== error_mark_node
903 || DECL_P(t
->type_descriptor_decl_
)));
905 if (t
->type_descriptor_decl_
== error_mark_node
)
906 return error_mark_node
;
907 return build_fold_addr_expr(t
->type_descriptor_decl_
);
910 // Return a composite literal for a type descriptor.
913 Type::type_descriptor(Gogo
* gogo
, Type
* type
)
915 return type
->do_type_descriptor(gogo
, NULL
);
918 // Return a composite literal for a type descriptor with a name.
921 Type::named_type_descriptor(Gogo
* gogo
, Type
* type
, Named_type
* name
)
923 gcc_assert(name
!= NULL
&& type
->named_type() != name
);
924 return type
->do_type_descriptor(gogo
, name
);
927 // Make a builtin struct type from a list of fields. The fields are
928 // pairs of a name and a type.
931 Type::make_builtin_struct_type(int nfields
, ...)
934 va_start(ap
, nfields
);
936 source_location bloc
= BUILTINS_LOCATION
;
937 Struct_field_list
* sfl
= new Struct_field_list();
938 for (int i
= 0; i
< nfields
; i
++)
940 const char* field_name
= va_arg(ap
, const char *);
941 Type
* type
= va_arg(ap
, Type
*);
942 sfl
->push_back(Struct_field(Typed_identifier(field_name
, type
, bloc
)));
947 return Type::make_struct_type(sfl
, bloc
);
950 // Make a builtin named type.
953 Type::make_builtin_named_type(const char* name
, Type
* type
)
955 source_location bloc
= BUILTINS_LOCATION
;
956 Named_object
* no
= Named_object::make_type(name
, NULL
, type
, bloc
);
957 return no
->type_value();
960 // Return the type of a type descriptor. We should really tie this to
961 // runtime.Type rather than copying it. This must match commonType in
962 // libgo/go/runtime/type.go.
965 Type::make_type_descriptor_type()
970 source_location bloc
= BUILTINS_LOCATION
;
972 Type
* uint8_type
= Type::lookup_integer_type("uint8");
973 Type
* uint32_type
= Type::lookup_integer_type("uint32");
974 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
975 Type
* string_type
= Type::lookup_string_type();
976 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
978 // This is an unnamed version of unsafe.Pointer. Perhaps we
979 // should use the named version instead, although that would
980 // require us to create the unsafe package if it has not been
981 // imported. It probably doesn't matter.
982 Type
* void_type
= Type::make_void_type();
983 Type
* unsafe_pointer_type
= Type::make_pointer_type(void_type
);
985 // Forward declaration for the type descriptor type.
986 Named_object
* named_type_descriptor_type
=
987 Named_object::make_type_declaration("commonType", NULL
, bloc
);
988 Type
* ft
= Type::make_forward_declaration(named_type_descriptor_type
);
989 Type
* pointer_type_descriptor_type
= Type::make_pointer_type(ft
);
991 // The type of a method on a concrete type.
992 Struct_type
* method_type
=
993 Type::make_builtin_struct_type(5,
994 "name", pointer_string_type
,
995 "pkgPath", pointer_string_type
,
996 "mtyp", pointer_type_descriptor_type
,
997 "typ", pointer_type_descriptor_type
,
998 "tfn", unsafe_pointer_type
);
999 Named_type
* named_method_type
=
1000 Type::make_builtin_named_type("method", method_type
);
1002 // Information for types with a name or methods.
1003 Type
* slice_named_method_type
=
1004 Type::make_array_type(named_method_type
, NULL
);
1005 Struct_type
* uncommon_type
=
1006 Type::make_builtin_struct_type(3,
1007 "name", pointer_string_type
,
1008 "pkgPath", pointer_string_type
,
1009 "methods", slice_named_method_type
);
1010 Named_type
* named_uncommon_type
=
1011 Type::make_builtin_named_type("uncommonType", uncommon_type
);
1013 Type
* pointer_uncommon_type
=
1014 Type::make_pointer_type(named_uncommon_type
);
1016 // The type descriptor type.
1018 Typed_identifier_list
* params
= new Typed_identifier_list();
1019 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1020 params
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1022 Typed_identifier_list
* results
= new Typed_identifier_list();
1023 results
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1025 Type
* hashfn_type
= Type::make_function_type(NULL
, params
, results
, bloc
);
1027 params
= new Typed_identifier_list();
1028 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1029 params
->push_back(Typed_identifier("", unsafe_pointer_type
, bloc
));
1030 params
->push_back(Typed_identifier("", uintptr_type
, bloc
));
1032 results
= new Typed_identifier_list();
1033 results
->push_back(Typed_identifier("", Type::lookup_bool_type(), bloc
));
1035 Type
* equalfn_type
= Type::make_function_type(NULL
, params
, results
,
1038 Struct_type
* type_descriptor_type
=
1039 Type::make_builtin_struct_type(9,
1041 "align", uint8_type
,
1042 "fieldAlign", uint8_type
,
1043 "size", uintptr_type
,
1044 "hash", uint32_type
,
1045 "hashfn", hashfn_type
,
1046 "equalfn", equalfn_type
,
1047 "string", pointer_string_type
,
1048 "", pointer_uncommon_type
);
1050 Named_type
* named
= Type::make_builtin_named_type("commonType",
1051 type_descriptor_type
);
1053 named_type_descriptor_type
->set_type_value(named
);
1061 // Make the type of a pointer to a type descriptor as represented in
1065 Type::make_type_descriptor_ptr_type()
1069 ret
= Type::make_pointer_type(Type::make_type_descriptor_type());
1073 // Return the names of runtime functions which compute a hash code for
1074 // this type and which compare whether two values of this type are
1078 Type::type_functions(const char** hash_fn
, const char** equal_fn
) const
1080 switch (this->base()->classification())
1082 case Type::TYPE_ERROR
:
1083 case Type::TYPE_VOID
:
1084 case Type::TYPE_NIL
:
1085 // These types can not be hashed or compared.
1086 *hash_fn
= "__go_type_hash_error";
1087 *equal_fn
= "__go_type_equal_error";
1090 case Type::TYPE_BOOLEAN
:
1091 case Type::TYPE_INTEGER
:
1092 case Type::TYPE_FLOAT
:
1093 case Type::TYPE_COMPLEX
:
1094 case Type::TYPE_POINTER
:
1095 case Type::TYPE_FUNCTION
:
1096 case Type::TYPE_MAP
:
1097 case Type::TYPE_CHANNEL
:
1098 *hash_fn
= "__go_type_hash_identity";
1099 *equal_fn
= "__go_type_equal_identity";
1102 case Type::TYPE_STRING
:
1103 *hash_fn
= "__go_type_hash_string";
1104 *equal_fn
= "__go_type_equal_string";
1107 case Type::TYPE_STRUCT
:
1108 case Type::TYPE_ARRAY
:
1109 // These types can not be hashed or compared.
1110 *hash_fn
= "__go_type_hash_error";
1111 *equal_fn
= "__go_type_equal_error";
1114 case Type::TYPE_INTERFACE
:
1115 if (this->interface_type()->is_empty())
1117 *hash_fn
= "__go_type_hash_empty_interface";
1118 *equal_fn
= "__go_type_equal_empty_interface";
1122 *hash_fn
= "__go_type_hash_interface";
1123 *equal_fn
= "__go_type_equal_interface";
1127 case Type::TYPE_NAMED
:
1128 case Type::TYPE_FORWARD
:
1136 // Return a composite literal for the type descriptor for a plain type
1137 // of kind RUNTIME_TYPE_KIND named NAME.
1140 Type::type_descriptor_constructor(Gogo
* gogo
, int runtime_type_kind
,
1141 Named_type
* name
, const Methods
* methods
,
1142 bool only_value_methods
)
1144 source_location bloc
= BUILTINS_LOCATION
;
1146 Type
* td_type
= Type::make_type_descriptor_type();
1147 const Struct_field_list
* fields
= td_type
->struct_type()->fields();
1149 Expression_list
* vals
= new Expression_list();
1152 Struct_field_list::const_iterator p
= fields
->begin();
1153 gcc_assert(p
->field_name() == "Kind");
1155 mpz_init_set_ui(iv
, runtime_type_kind
);
1156 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
1159 gcc_assert(p
->field_name() == "align");
1160 Expression::Type_info type_info
= Expression::TYPE_INFO_ALIGNMENT
;
1161 vals
->push_back(Expression::make_type_info(this, type_info
));
1164 gcc_assert(p
->field_name() == "fieldAlign");
1165 type_info
= Expression::TYPE_INFO_FIELD_ALIGNMENT
;
1166 vals
->push_back(Expression::make_type_info(this, type_info
));
1169 gcc_assert(p
->field_name() == "size");
1170 type_info
= Expression::TYPE_INFO_SIZE
;
1171 vals
->push_back(Expression::make_type_info(this, type_info
));
1174 gcc_assert(p
->field_name() == "hash");
1175 mpz_set_ui(iv
, this->hash_for_method(gogo
));
1176 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
1178 const char* hash_fn
;
1179 const char* equal_fn
;
1180 this->type_functions(&hash_fn
, &equal_fn
);
1183 gcc_assert(p
->field_name() == "hashfn");
1184 Function_type
* fntype
= p
->type()->function_type();
1185 Named_object
* no
= Named_object::make_function_declaration(hash_fn
, NULL
,
1188 no
->func_declaration_value()->set_asm_name(hash_fn
);
1189 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1192 gcc_assert(p
->field_name() == "equalfn");
1193 fntype
= p
->type()->function_type();
1194 no
= Named_object::make_function_declaration(equal_fn
, NULL
, fntype
, bloc
);
1195 no
->func_declaration_value()->set_asm_name(equal_fn
);
1196 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1199 gcc_assert(p
->field_name() == "string");
1200 Expression
* s
= Expression::make_string((name
!= NULL
1201 ? name
->reflection(gogo
)
1202 : this->reflection(gogo
)),
1204 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1207 gcc_assert(p
->field_name() == "uncommonType");
1208 if (name
== NULL
&& methods
== NULL
)
1209 vals
->push_back(Expression::make_nil(bloc
));
1212 if (methods
== NULL
)
1213 methods
= name
->methods();
1214 vals
->push_back(this->uncommon_type_constructor(gogo
,
1217 only_value_methods
));
1221 gcc_assert(p
== fields
->end());
1225 return Expression::make_struct_composite_literal(td_type
, vals
, bloc
);
1228 // Return a composite literal for the uncommon type information for
1229 // this type. UNCOMMON_STRUCT_TYPE is the type of the uncommon type
1230 // struct. If name is not NULL, it is the name of the type. If
1231 // METHODS is not NULL, it is the list of methods. ONLY_VALUE_METHODS
1232 // is true if only value methods should be included. At least one of
1233 // NAME and METHODS must not be NULL.
1236 Type::uncommon_type_constructor(Gogo
* gogo
, Type
* uncommon_type
,
1237 Named_type
* name
, const Methods
* methods
,
1238 bool only_value_methods
) const
1240 source_location bloc
= BUILTINS_LOCATION
;
1242 const Struct_field_list
* fields
= uncommon_type
->struct_type()->fields();
1244 Expression_list
* vals
= new Expression_list();
1247 Struct_field_list::const_iterator p
= fields
->begin();
1248 gcc_assert(p
->field_name() == "name");
1251 gcc_assert(p
->field_name() == "pkgPath");
1255 vals
->push_back(Expression::make_nil(bloc
));
1256 vals
->push_back(Expression::make_nil(bloc
));
1260 Named_object
* no
= name
->named_object();
1261 std::string n
= Gogo::unpack_hidden_name(no
->name());
1262 Expression
* s
= Expression::make_string(n
, bloc
);
1263 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1265 if (name
->is_builtin())
1266 vals
->push_back(Expression::make_nil(bloc
));
1269 const Package
* package
= no
->package();
1270 const std::string
& unique_prefix(package
== NULL
1271 ? gogo
->unique_prefix()
1272 : package
->unique_prefix());
1273 const std::string
& package_name(package
== NULL
1274 ? gogo
->package_name()
1276 n
.assign(unique_prefix
);
1278 n
.append(package_name
);
1279 if (name
->in_function() != NULL
)
1282 n
.append(Gogo::unpack_hidden_name(name
->in_function()->name()));
1284 s
= Expression::make_string(n
, bloc
);
1285 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1290 gcc_assert(p
->field_name() == "methods");
1291 vals
->push_back(this->methods_constructor(gogo
, p
->type(), methods
,
1292 only_value_methods
));
1295 gcc_assert(p
== fields
->end());
1297 Expression
* r
= Expression::make_struct_composite_literal(uncommon_type
,
1299 return Expression::make_unary(OPERATOR_AND
, r
, bloc
);
1302 // Sort methods by name.
1308 operator()(const std::pair
<std::string
, const Method
*>& m1
,
1309 const std::pair
<std::string
, const Method
*>& m2
) const
1310 { return m1
.first
< m2
.first
; }
1313 // Return a composite literal for the type method table for this type.
1314 // METHODS_TYPE is the type of the table, and is a slice type.
1315 // METHODS is the list of methods. If ONLY_VALUE_METHODS is true,
1316 // then only value methods are used.
1319 Type::methods_constructor(Gogo
* gogo
, Type
* methods_type
,
1320 const Methods
* methods
,
1321 bool only_value_methods
) const
1323 source_location bloc
= BUILTINS_LOCATION
;
1325 std::vector
<std::pair
<std::string
, const Method
*> > smethods
;
1326 if (methods
!= NULL
)
1328 smethods
.reserve(methods
->count());
1329 for (Methods::const_iterator p
= methods
->begin();
1330 p
!= methods
->end();
1333 if (p
->second
->is_ambiguous())
1335 if (only_value_methods
&& !p
->second
->is_value_method())
1337 smethods
.push_back(std::make_pair(p
->first
, p
->second
));
1341 if (smethods
.empty())
1342 return Expression::make_slice_composite_literal(methods_type
, NULL
, bloc
);
1344 std::sort(smethods
.begin(), smethods
.end(), Sort_methods());
1346 Type
* method_type
= methods_type
->array_type()->element_type();
1348 Expression_list
* vals
= new Expression_list();
1349 vals
->reserve(smethods
.size());
1350 for (std::vector
<std::pair
<std::string
, const Method
*> >::const_iterator p
1352 p
!= smethods
.end();
1354 vals
->push_back(this->method_constructor(gogo
, method_type
, p
->first
,
1357 return Expression::make_slice_composite_literal(methods_type
, vals
, bloc
);
1360 // Return a composite literal for a single method. METHOD_TYPE is the
1361 // type of the entry. METHOD_NAME is the name of the method and M is
1362 // the method information.
1365 Type::method_constructor(Gogo
*, Type
* method_type
,
1366 const std::string
& method_name
,
1367 const Method
* m
) const
1369 source_location bloc
= BUILTINS_LOCATION
;
1371 const Struct_field_list
* fields
= method_type
->struct_type()->fields();
1373 Expression_list
* vals
= new Expression_list();
1376 Struct_field_list::const_iterator p
= fields
->begin();
1377 gcc_assert(p
->field_name() == "name");
1378 const std::string n
= Gogo::unpack_hidden_name(method_name
);
1379 Expression
* s
= Expression::make_string(n
, bloc
);
1380 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1383 gcc_assert(p
->field_name() == "pkgPath");
1384 if (!Gogo::is_hidden_name(method_name
))
1385 vals
->push_back(Expression::make_nil(bloc
));
1388 s
= Expression::make_string(Gogo::hidden_name_prefix(method_name
), bloc
);
1389 vals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
1392 Named_object
* no
= (m
->needs_stub_method()
1394 : m
->named_object());
1396 Function_type
* mtype
;
1397 if (no
->is_function())
1398 mtype
= no
->func_value()->type();
1400 mtype
= no
->func_declaration_value()->type();
1401 gcc_assert(mtype
->is_method());
1402 Type
* nonmethod_type
= mtype
->copy_without_receiver();
1405 gcc_assert(p
->field_name() == "mtyp");
1406 vals
->push_back(Expression::make_type_descriptor(nonmethod_type
, bloc
));
1409 gcc_assert(p
->field_name() == "typ");
1410 vals
->push_back(Expression::make_type_descriptor(mtype
, bloc
));
1413 gcc_assert(p
->field_name() == "tfn");
1414 vals
->push_back(Expression::make_func_reference(no
, NULL
, bloc
));
1417 gcc_assert(p
== fields
->end());
1419 return Expression::make_struct_composite_literal(method_type
, vals
, bloc
);
1422 // Return a composite literal for the type descriptor of a plain type.
1423 // RUNTIME_TYPE_KIND is the value of the kind field. If NAME is not
1424 // NULL, it is the name to use as well as the list of methods.
1427 Type::plain_type_descriptor(Gogo
* gogo
, int runtime_type_kind
,
1430 return this->type_descriptor_constructor(gogo
, runtime_type_kind
,
1434 // Return the type reflection string for this type.
1437 Type::reflection(Gogo
* gogo
) const
1441 // The do_reflection virtual function should set RET to the
1442 // reflection string.
1443 this->do_reflection(gogo
, &ret
);
1448 // Return a mangled name for the type.
1451 Type::mangled_name(Gogo
* gogo
) const
1455 // The do_mangled_name virtual function should set RET to the
1456 // mangled name. For a composite type it should append a code for
1457 // the composition and then call do_mangled_name on the components.
1458 this->do_mangled_name(gogo
, &ret
);
1463 // Default function to export a type.
1466 Type::do_export(Export
*) const
1474 Type::import_type(Import
* imp
)
1476 if (imp
->match_c_string("("))
1477 return Function_type::do_import(imp
);
1478 else if (imp
->match_c_string("*"))
1479 return Pointer_type::do_import(imp
);
1480 else if (imp
->match_c_string("struct "))
1481 return Struct_type::do_import(imp
);
1482 else if (imp
->match_c_string("["))
1483 return Array_type::do_import(imp
);
1484 else if (imp
->match_c_string("map "))
1485 return Map_type::do_import(imp
);
1486 else if (imp
->match_c_string("chan "))
1487 return Channel_type::do_import(imp
);
1488 else if (imp
->match_c_string("interface"))
1489 return Interface_type::do_import(imp
);
1492 error_at(imp
->location(), "import error: expected type");
1493 return Type::make_error_type();
1497 // A type used to indicate a parsing error. This exists to simplify
1498 // later error detection.
1500 class Error_type
: public Type
1510 { return error_mark_node
; }
1513 do_get_init_tree(Gogo
*, tree
, bool)
1514 { return error_mark_node
; }
1517 do_type_descriptor(Gogo
*, Named_type
*)
1518 { return Expression::make_error(BUILTINS_LOCATION
); }
1521 do_reflection(Gogo
*, std::string
*) const
1522 { gcc_assert(saw_errors()); }
1525 do_mangled_name(Gogo
*, std::string
* ret
) const
1526 { ret
->push_back('E'); }
1530 Type::make_error_type()
1532 static Error_type singleton_error_type
;
1533 return &singleton_error_type
;
1538 class Void_type
: public Type
1548 { return void_type_node
; }
1551 do_get_init_tree(Gogo
*, tree
, bool)
1552 { gcc_unreachable(); }
1555 do_type_descriptor(Gogo
*, Named_type
*)
1556 { gcc_unreachable(); }
1559 do_reflection(Gogo
*, std::string
*) const
1563 do_mangled_name(Gogo
*, std::string
* ret
) const
1564 { ret
->push_back('v'); }
1568 Type::make_void_type()
1570 static Void_type singleton_void_type
;
1571 return &singleton_void_type
;
1574 // The boolean type.
1576 class Boolean_type
: public Type
1580 : Type(TYPE_BOOLEAN
)
1586 { return boolean_type_node
; }
1589 do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1590 { return is_clear
? NULL
: fold_convert(type_tree
, boolean_false_node
); }
1593 do_type_descriptor(Gogo
*, Named_type
* name
);
1595 // We should not be asked for the reflection string of a basic type.
1597 do_reflection(Gogo
*, std::string
* ret
) const
1598 { ret
->append("bool"); }
1601 do_mangled_name(Gogo
*, std::string
* ret
) const
1602 { ret
->push_back('b'); }
1605 // Make the type descriptor.
1608 Boolean_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1611 return this->plain_type_descriptor(gogo
, RUNTIME_TYPE_KIND_BOOL
, name
);
1614 Named_object
* no
= gogo
->lookup_global("bool");
1615 gcc_assert(no
!= NULL
);
1616 return Type::type_descriptor(gogo
, no
->type_value());
1621 Type::make_boolean_type()
1623 static Boolean_type boolean_type
;
1624 return &boolean_type
;
1627 // The named type "bool".
1629 static Named_type
* named_bool_type
;
1631 // Get the named type "bool".
1634 Type::lookup_bool_type()
1636 return named_bool_type
;
1639 // Make the named type "bool".
1642 Type::make_named_bool_type()
1644 Type
* bool_type
= Type::make_boolean_type();
1645 Named_object
* named_object
= Named_object::make_type("bool", NULL
,
1648 Named_type
* named_type
= named_object
->type_value();
1649 named_bool_type
= named_type
;
1653 // Class Integer_type.
1655 Integer_type::Named_integer_types
Integer_type::named_integer_types
;
1657 // Create a new integer type. Non-abstract integer types always have
1661 Integer_type::create_integer_type(const char* name
, bool is_unsigned
,
1662 int bits
, int runtime_type_kind
)
1664 Integer_type
* integer_type
= new Integer_type(false, is_unsigned
, bits
,
1666 std::string
sname(name
);
1667 Named_object
* named_object
= Named_object::make_type(sname
, NULL
,
1670 Named_type
* named_type
= named_object
->type_value();
1671 std::pair
<Named_integer_types::iterator
, bool> ins
=
1672 Integer_type::named_integer_types
.insert(std::make_pair(sname
, named_type
));
1673 gcc_assert(ins
.second
);
1677 // Look up an existing integer type.
1680 Integer_type::lookup_integer_type(const char* name
)
1682 Named_integer_types::const_iterator p
=
1683 Integer_type::named_integer_types
.find(name
);
1684 gcc_assert(p
!= Integer_type::named_integer_types
.end());
1688 // Create a new abstract integer type.
1691 Integer_type::create_abstract_integer_type()
1693 static Integer_type
* abstract_type
;
1694 if (abstract_type
== NULL
)
1695 abstract_type
= new Integer_type(true, false, INT_TYPE_SIZE
,
1696 RUNTIME_TYPE_KIND_INT
);
1697 return abstract_type
;
1700 // Integer type compatibility.
1703 Integer_type::is_identical(const Integer_type
* t
) const
1705 if (this->is_unsigned_
!= t
->is_unsigned_
|| this->bits_
!= t
->bits_
)
1707 return this->is_abstract_
== t
->is_abstract_
;
1713 Integer_type::do_hash_for_method(Gogo
*) const
1715 return ((this->bits_
<< 4)
1716 + ((this->is_unsigned_
? 1 : 0) << 8)
1717 + ((this->is_abstract_
? 1 : 0) << 9));
1720 // Get the tree for an Integer_type.
1723 Integer_type::do_get_tree(Gogo
*)
1725 gcc_assert(!this->is_abstract_
);
1726 if (this->is_unsigned_
)
1728 if (this->bits_
== INT_TYPE_SIZE
)
1729 return unsigned_type_node
;
1730 else if (this->bits_
== CHAR_TYPE_SIZE
)
1731 return unsigned_char_type_node
;
1732 else if (this->bits_
== SHORT_TYPE_SIZE
)
1733 return short_unsigned_type_node
;
1734 else if (this->bits_
== LONG_TYPE_SIZE
)
1735 return long_unsigned_type_node
;
1736 else if (this->bits_
== LONG_LONG_TYPE_SIZE
)
1737 return long_long_unsigned_type_node
;
1739 return make_unsigned_type(this->bits_
);
1743 if (this->bits_
== INT_TYPE_SIZE
)
1744 return integer_type_node
;
1745 else if (this->bits_
== CHAR_TYPE_SIZE
)
1746 return signed_char_type_node
;
1747 else if (this->bits_
== SHORT_TYPE_SIZE
)
1748 return short_integer_type_node
;
1749 else if (this->bits_
== LONG_TYPE_SIZE
)
1750 return long_integer_type_node
;
1751 else if (this->bits_
== LONG_LONG_TYPE_SIZE
)
1752 return long_long_integer_type_node
;
1754 return make_signed_type(this->bits_
);
1759 Integer_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1761 return is_clear
? NULL
: build_int_cst(type_tree
, 0);
1764 // The type descriptor for an integer type. Integer types are always
1768 Integer_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1770 gcc_assert(name
!= NULL
);
1771 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
1774 // We should not be asked for the reflection string of a basic type.
1777 Integer_type::do_reflection(Gogo
*, std::string
*) const
1785 Integer_type::do_mangled_name(Gogo
*, std::string
* ret
) const
1788 snprintf(buf
, sizeof buf
, "i%s%s%de",
1789 this->is_abstract_
? "a" : "",
1790 this->is_unsigned_
? "u" : "",
1795 // Make an integer type.
1798 Type::make_integer_type(const char* name
, bool is_unsigned
, int bits
,
1799 int runtime_type_kind
)
1801 return Integer_type::create_integer_type(name
, is_unsigned
, bits
,
1805 // Make an abstract integer type.
1808 Type::make_abstract_integer_type()
1810 return Integer_type::create_abstract_integer_type();
1813 // Look up an integer type.
1816 Type::lookup_integer_type(const char* name
)
1818 return Integer_type::lookup_integer_type(name
);
1821 // Class Float_type.
1823 Float_type::Named_float_types
Float_type::named_float_types
;
1825 // Create a new float type. Non-abstract float types always have
1829 Float_type::create_float_type(const char* name
, int bits
,
1830 int runtime_type_kind
)
1832 Float_type
* float_type
= new Float_type(false, bits
, runtime_type_kind
);
1833 std::string
sname(name
);
1834 Named_object
* named_object
= Named_object::make_type(sname
, NULL
, float_type
,
1836 Named_type
* named_type
= named_object
->type_value();
1837 std::pair
<Named_float_types::iterator
, bool> ins
=
1838 Float_type::named_float_types
.insert(std::make_pair(sname
, named_type
));
1839 gcc_assert(ins
.second
);
1843 // Look up an existing float type.
1846 Float_type::lookup_float_type(const char* name
)
1848 Named_float_types::const_iterator p
=
1849 Float_type::named_float_types
.find(name
);
1850 gcc_assert(p
!= Float_type::named_float_types
.end());
1854 // Create a new abstract float type.
1857 Float_type::create_abstract_float_type()
1859 static Float_type
* abstract_type
;
1860 if (abstract_type
== NULL
)
1861 abstract_type
= new Float_type(true, FLOAT_TYPE_SIZE
,
1862 RUNTIME_TYPE_KIND_FLOAT
);
1863 return abstract_type
;
1866 // Whether this type is identical with T.
1869 Float_type::is_identical(const Float_type
* t
) const
1871 if (this->bits_
!= t
->bits_
)
1873 return this->is_abstract_
== t
->is_abstract_
;
1879 Float_type::do_hash_for_method(Gogo
*) const
1881 return (this->bits_
<< 4) + ((this->is_abstract_
? 1 : 0) << 8);
1884 // Get a tree without using a Gogo*.
1887 Float_type::type_tree() const
1889 if (this->bits_
== FLOAT_TYPE_SIZE
)
1890 return float_type_node
;
1891 else if (this->bits_
== DOUBLE_TYPE_SIZE
)
1892 return double_type_node
;
1893 else if (this->bits_
== LONG_DOUBLE_TYPE_SIZE
)
1894 return long_double_type_node
;
1897 tree ret
= make_node(REAL_TYPE
);
1898 TYPE_PRECISION(ret
) = this->bits_
;
1907 Float_type::do_get_tree(Gogo
*)
1909 return this->type_tree();
1913 Float_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
1918 real_from_integer(&r
, TYPE_MODE(type_tree
), 0, 0, 0);
1919 return build_real(type_tree
, r
);
1922 // The type descriptor for a float type. Float types are always named.
1925 Float_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
1927 gcc_assert(name
!= NULL
);
1928 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
1931 // We should not be asked for the reflection string of a basic type.
1934 Float_type::do_reflection(Gogo
*, std::string
*) const
1942 Float_type::do_mangled_name(Gogo
*, std::string
* ret
) const
1945 snprintf(buf
, sizeof buf
, "f%s%de",
1946 this->is_abstract_
? "a" : "",
1951 // Make a floating point type.
1954 Type::make_float_type(const char* name
, int bits
, int runtime_type_kind
)
1956 return Float_type::create_float_type(name
, bits
, runtime_type_kind
);
1959 // Make an abstract float type.
1962 Type::make_abstract_float_type()
1964 return Float_type::create_abstract_float_type();
1967 // Look up a float type.
1970 Type::lookup_float_type(const char* name
)
1972 return Float_type::lookup_float_type(name
);
1975 // Class Complex_type.
1977 Complex_type::Named_complex_types
Complex_type::named_complex_types
;
1979 // Create a new complex type. Non-abstract complex types always have
1983 Complex_type::create_complex_type(const char* name
, int bits
,
1984 int runtime_type_kind
)
1986 Complex_type
* complex_type
= new Complex_type(false, bits
,
1988 std::string
sname(name
);
1989 Named_object
* named_object
= Named_object::make_type(sname
, NULL
,
1992 Named_type
* named_type
= named_object
->type_value();
1993 std::pair
<Named_complex_types::iterator
, bool> ins
=
1994 Complex_type::named_complex_types
.insert(std::make_pair(sname
,
1996 gcc_assert(ins
.second
);
2000 // Look up an existing complex type.
2003 Complex_type::lookup_complex_type(const char* name
)
2005 Named_complex_types::const_iterator p
=
2006 Complex_type::named_complex_types
.find(name
);
2007 gcc_assert(p
!= Complex_type::named_complex_types
.end());
2011 // Create a new abstract complex type.
2014 Complex_type::create_abstract_complex_type()
2016 static Complex_type
* abstract_type
;
2017 if (abstract_type
== NULL
)
2018 abstract_type
= new Complex_type(true, FLOAT_TYPE_SIZE
* 2,
2019 RUNTIME_TYPE_KIND_FLOAT
);
2020 return abstract_type
;
2023 // Whether this type is identical with T.
2026 Complex_type::is_identical(const Complex_type
*t
) const
2028 if (this->bits_
!= t
->bits_
)
2030 return this->is_abstract_
== t
->is_abstract_
;
2036 Complex_type::do_hash_for_method(Gogo
*) const
2038 return (this->bits_
<< 4) + ((this->is_abstract_
? 1 : 0) << 8);
2041 // Get a tree without using a Gogo*.
2044 Complex_type::type_tree() const
2046 if (this->bits_
== FLOAT_TYPE_SIZE
* 2)
2047 return complex_float_type_node
;
2048 else if (this->bits_
== DOUBLE_TYPE_SIZE
* 2)
2049 return complex_double_type_node
;
2050 else if (this->bits_
== LONG_DOUBLE_TYPE_SIZE
* 2)
2051 return complex_long_double_type_node
;
2054 tree ret
= make_node(REAL_TYPE
);
2055 TYPE_PRECISION(ret
) = this->bits_
/ 2;
2057 return build_complex_type(ret
);
2064 Complex_type::do_get_tree(Gogo
*)
2066 return this->type_tree();
2069 // Zero initializer.
2072 Complex_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2077 real_from_integer(&r
, TYPE_MODE(TREE_TYPE(type_tree
)), 0, 0, 0);
2078 return build_complex(type_tree
, build_real(TREE_TYPE(type_tree
), r
),
2079 build_real(TREE_TYPE(type_tree
), r
));
2082 // The type descriptor for a complex type. Complex types are always
2086 Complex_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2088 gcc_assert(name
!= NULL
);
2089 return this->plain_type_descriptor(gogo
, this->runtime_type_kind_
, name
);
2092 // We should not be asked for the reflection string of a basic type.
2095 Complex_type::do_reflection(Gogo
*, std::string
*) const
2103 Complex_type::do_mangled_name(Gogo
*, std::string
* ret
) const
2106 snprintf(buf
, sizeof buf
, "c%s%de",
2107 this->is_abstract_
? "a" : "",
2112 // Make a complex type.
2115 Type::make_complex_type(const char* name
, int bits
, int runtime_type_kind
)
2117 return Complex_type::create_complex_type(name
, bits
, runtime_type_kind
);
2120 // Make an abstract complex type.
2123 Type::make_abstract_complex_type()
2125 return Complex_type::create_abstract_complex_type();
2128 // Look up a complex type.
2131 Type::lookup_complex_type(const char* name
)
2133 return Complex_type::lookup_complex_type(name
);
2136 // Class String_type.
2138 // Return the tree for String_type. A string is a struct with two
2139 // fields: a pointer to the characters and a length.
2142 String_type::do_get_tree(Gogo
*)
2144 static tree struct_type
;
2145 return Gogo::builtin_struct(&struct_type
, "__go_string", NULL_TREE
, 2,
2147 build_pointer_type(unsigned_char_type_node
),
2152 // Return a tree for the length of STRING.
2155 String_type::length_tree(Gogo
*, tree string
)
2157 tree string_type
= TREE_TYPE(string
);
2158 gcc_assert(TREE_CODE(string_type
) == RECORD_TYPE
);
2159 tree length_field
= DECL_CHAIN(TYPE_FIELDS(string_type
));
2160 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(length_field
)),
2162 return fold_build3(COMPONENT_REF
, integer_type_node
, string
,
2163 length_field
, NULL_TREE
);
2166 // Return a tree for a pointer to the bytes of STRING.
2169 String_type::bytes_tree(Gogo
*, tree string
)
2171 tree string_type
= TREE_TYPE(string
);
2172 gcc_assert(TREE_CODE(string_type
) == RECORD_TYPE
);
2173 tree bytes_field
= TYPE_FIELDS(string_type
);
2174 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(bytes_field
)),
2176 return fold_build3(COMPONENT_REF
, TREE_TYPE(bytes_field
), string
,
2177 bytes_field
, NULL_TREE
);
2180 // We initialize a string to { NULL, 0 }.
2183 String_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2188 gcc_assert(TREE_CODE(type_tree
) == RECORD_TYPE
);
2190 VEC(constructor_elt
, gc
)* init
= VEC_alloc(constructor_elt
, gc
, 2);
2192 for (tree field
= TYPE_FIELDS(type_tree
);
2194 field
= DECL_CHAIN(field
))
2196 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
2198 elt
->value
= fold_convert(TREE_TYPE(field
), size_zero_node
);
2201 tree ret
= build_constructor(type_tree
, init
);
2202 TREE_CONSTANT(ret
) = 1;
2206 // The type descriptor for the string type.
2209 String_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2212 return this->plain_type_descriptor(gogo
, RUNTIME_TYPE_KIND_STRING
, name
);
2215 Named_object
* no
= gogo
->lookup_global("string");
2216 gcc_assert(no
!= NULL
);
2217 return Type::type_descriptor(gogo
, no
->type_value());
2221 // We should not be asked for the reflection string of a basic type.
2224 String_type::do_reflection(Gogo
*, std::string
* ret
) const
2226 ret
->append("string");
2229 // Mangled name of a string type.
2232 String_type::do_mangled_name(Gogo
*, std::string
* ret
) const
2234 ret
->push_back('z');
2237 // Make a string type.
2240 Type::make_string_type()
2242 static String_type string_type
;
2243 return &string_type
;
2246 // The named type "string".
2248 static Named_type
* named_string_type
;
2250 // Get the named type "string".
2253 Type::lookup_string_type()
2255 return named_string_type
;
2258 // Make the named type string.
2261 Type::make_named_string_type()
2263 Type
* string_type
= Type::make_string_type();
2264 Named_object
* named_object
= Named_object::make_type("string", NULL
,
2267 Named_type
* named_type
= named_object
->type_value();
2268 named_string_type
= named_type
;
2272 // The sink type. This is the type of the blank identifier _. Any
2273 // type may be assigned to it.
2275 class Sink_type
: public Type
2285 { gcc_unreachable(); }
2288 do_get_init_tree(Gogo
*, tree
, bool)
2289 { gcc_unreachable(); }
2292 do_type_descriptor(Gogo
*, Named_type
*)
2293 { gcc_unreachable(); }
2296 do_reflection(Gogo
*, std::string
*) const
2297 { gcc_unreachable(); }
2300 do_mangled_name(Gogo
*, std::string
*) const
2301 { gcc_unreachable(); }
2304 // Make the sink type.
2307 Type::make_sink_type()
2309 static Sink_type sink_type
;
2313 // Class Function_type.
2318 Function_type::do_traverse(Traverse
* traverse
)
2320 if (this->receiver_
!= NULL
2321 && Type::traverse(this->receiver_
->type(), traverse
) == TRAVERSE_EXIT
)
2322 return TRAVERSE_EXIT
;
2323 if (this->parameters_
!= NULL
2324 && this->parameters_
->traverse(traverse
) == TRAVERSE_EXIT
)
2325 return TRAVERSE_EXIT
;
2326 if (this->results_
!= NULL
2327 && this->results_
->traverse(traverse
) == TRAVERSE_EXIT
)
2328 return TRAVERSE_EXIT
;
2329 return TRAVERSE_CONTINUE
;
2332 // Returns whether T is a valid redeclaration of this type. If this
2333 // returns false, and REASON is not NULL, *REASON may be set to a
2334 // brief explanation of why it returned false.
2337 Function_type::is_valid_redeclaration(const Function_type
* t
,
2338 std::string
* reason
) const
2340 if (!this->is_identical(t
, false, true, reason
))
2343 // A redeclaration of a function is required to use the same names
2344 // for the receiver and parameters.
2345 if (this->receiver() != NULL
2346 && this->receiver()->name() != t
->receiver()->name()
2347 && this->receiver()->name() != Import::import_marker
2348 && t
->receiver()->name() != Import::import_marker
)
2351 *reason
= "receiver name changed";
2355 const Typed_identifier_list
* parms1
= this->parameters();
2356 const Typed_identifier_list
* parms2
= t
->parameters();
2359 Typed_identifier_list::const_iterator p1
= parms1
->begin();
2360 for (Typed_identifier_list::const_iterator p2
= parms2
->begin();
2361 p2
!= parms2
->end();
2364 if (p1
->name() != p2
->name()
2365 && p1
->name() != Import::import_marker
2366 && p2
->name() != Import::import_marker
)
2369 *reason
= "parameter name changed";
2373 // This is called at parse time, so we may have unknown
2375 Type
* t1
= p1
->type()->forwarded();
2376 Type
* t2
= p2
->type()->forwarded();
2378 && t1
->forward_declaration_type() != NULL
2379 && (t2
->forward_declaration_type() == NULL
2380 || (t1
->forward_declaration_type()->named_object()
2381 != t2
->forward_declaration_type()->named_object())))
2386 const Typed_identifier_list
* results1
= this->results();
2387 const Typed_identifier_list
* results2
= t
->results();
2388 if (results1
!= NULL
)
2390 Typed_identifier_list::const_iterator res1
= results1
->begin();
2391 for (Typed_identifier_list::const_iterator res2
= results2
->begin();
2392 res2
!= results2
->end();
2395 if (res1
->name() != res2
->name()
2396 && res1
->name() != Import::import_marker
2397 && res2
->name() != Import::import_marker
)
2400 *reason
= "result name changed";
2404 // This is called at parse time, so we may have unknown
2406 Type
* t1
= res1
->type()->forwarded();
2407 Type
* t2
= res2
->type()->forwarded();
2409 && t1
->forward_declaration_type() != NULL
2410 && (t2
->forward_declaration_type() == NULL
2411 || (t1
->forward_declaration_type()->named_object()
2412 != t2
->forward_declaration_type()->named_object())))
2420 // Check whether T is the same as this type.
2423 Function_type::is_identical(const Function_type
* t
, bool ignore_receiver
,
2424 bool errors_are_identical
,
2425 std::string
* reason
) const
2427 if (!ignore_receiver
)
2429 const Typed_identifier
* r1
= this->receiver();
2430 const Typed_identifier
* r2
= t
->receiver();
2431 if ((r1
!= NULL
) != (r2
!= NULL
))
2434 *reason
= _("different receiver types");
2439 if (!Type::are_identical(r1
->type(), r2
->type(), errors_are_identical
,
2442 if (reason
!= NULL
&& !reason
->empty())
2443 *reason
= "receiver: " + *reason
;
2449 const Typed_identifier_list
* parms1
= this->parameters();
2450 const Typed_identifier_list
* parms2
= t
->parameters();
2451 if ((parms1
!= NULL
) != (parms2
!= NULL
))
2454 *reason
= _("different number of parameters");
2459 Typed_identifier_list::const_iterator p1
= parms1
->begin();
2460 for (Typed_identifier_list::const_iterator p2
= parms2
->begin();
2461 p2
!= parms2
->end();
2464 if (p1
== parms1
->end())
2467 *reason
= _("different number of parameters");
2471 if (!Type::are_identical(p1
->type(), p2
->type(),
2472 errors_are_identical
, NULL
))
2475 *reason
= _("different parameter types");
2479 if (p1
!= parms1
->end())
2482 *reason
= _("different number of parameters");
2487 if (this->is_varargs() != t
->is_varargs())
2490 *reason
= _("different varargs");
2494 const Typed_identifier_list
* results1
= this->results();
2495 const Typed_identifier_list
* results2
= t
->results();
2496 if ((results1
!= NULL
) != (results2
!= NULL
))
2499 *reason
= _("different number of results");
2502 if (results1
!= NULL
)
2504 Typed_identifier_list::const_iterator res1
= results1
->begin();
2505 for (Typed_identifier_list::const_iterator res2
= results2
->begin();
2506 res2
!= results2
->end();
2509 if (res1
== results1
->end())
2512 *reason
= _("different number of results");
2516 if (!Type::are_identical(res1
->type(), res2
->type(),
2517 errors_are_identical
, NULL
))
2520 *reason
= _("different result types");
2524 if (res1
!= results1
->end())
2527 *reason
= _("different number of results");
2538 Function_type::do_hash_for_method(Gogo
* gogo
) const
2540 unsigned int ret
= 0;
2541 // We ignore the receiver type for hash codes, because we need to
2542 // get the same hash code for a method in an interface and a method
2543 // declared for a type. The former will not have a receiver.
2544 if (this->parameters_
!= NULL
)
2547 for (Typed_identifier_list::const_iterator p
= this->parameters_
->begin();
2548 p
!= this->parameters_
->end();
2550 ret
+= p
->type()->hash_for_method(gogo
) << shift
;
2552 if (this->results_
!= NULL
)
2555 for (Typed_identifier_list::const_iterator p
= this->results_
->begin();
2556 p
!= this->results_
->end();
2558 ret
+= p
->type()->hash_for_method(gogo
) << shift
;
2560 if (this->is_varargs_
)
2566 // Get the tree for a function type.
2569 Function_type::do_get_tree(Gogo
* gogo
)
2571 tree args
= NULL_TREE
;
2574 if (this->receiver_
!= NULL
)
2576 Type
* rtype
= this->receiver_
->type();
2577 tree ptype
= rtype
->get_tree(gogo
);
2578 if (ptype
== error_mark_node
)
2579 return error_mark_node
;
2581 // We always pass the address of the receiver parameter, in
2582 // order to make interface calls work with unknown types.
2583 if (rtype
->points_to() == NULL
)
2584 ptype
= build_pointer_type(ptype
);
2586 *pp
= tree_cons (NULL_TREE
, ptype
, NULL_TREE
);
2587 pp
= &TREE_CHAIN (*pp
);
2590 if (this->parameters_
!= NULL
)
2592 for (Typed_identifier_list::const_iterator p
= this->parameters_
->begin();
2593 p
!= this->parameters_
->end();
2596 tree ptype
= p
->type()->get_tree(gogo
);
2597 if (ptype
== error_mark_node
)
2598 return error_mark_node
;
2599 *pp
= tree_cons (NULL_TREE
, ptype
, NULL_TREE
);
2600 pp
= &TREE_CHAIN (*pp
);
2604 // Varargs is handled entirely at the Go level. At the tree level,
2605 // functions are not varargs.
2606 *pp
= void_list_node
;
2609 if (this->results_
== NULL
)
2610 result
= void_type_node
;
2611 else if (this->results_
->size() == 1)
2612 result
= this->results_
->begin()->type()->get_tree(gogo
);
2615 result
= make_node(RECORD_TYPE
);
2616 tree field_trees
= NULL_TREE
;
2617 tree
* pp
= &field_trees
;
2618 for (Typed_identifier_list::const_iterator p
= this->results_
->begin();
2619 p
!= this->results_
->end();
2622 const std::string name
= (p
->name().empty()
2624 : Gogo::unpack_hidden_name(p
->name()));
2625 tree name_tree
= get_identifier_with_length(name
.data(),
2627 tree field_type_tree
= p
->type()->get_tree(gogo
);
2628 if (field_type_tree
== error_mark_node
)
2629 return error_mark_node
;
2630 tree field
= build_decl(this->location_
, FIELD_DECL
, name_tree
,
2632 DECL_CONTEXT(field
) = result
;
2634 pp
= &DECL_CHAIN(field
);
2636 TYPE_FIELDS(result
) = field_trees
;
2637 layout_type(result
);
2640 if (result
== error_mark_node
)
2641 return error_mark_node
;
2643 tree fntype
= build_function_type(result
, args
);
2644 if (fntype
== error_mark_node
)
2647 return build_pointer_type(fntype
);
2650 // Functions are initialized to NULL.
2653 Function_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
2657 return fold_convert(type_tree
, null_pointer_node
);
2660 // The type of a function type descriptor.
2663 Function_type::make_function_type_descriptor_type()
2668 Type
* tdt
= Type::make_type_descriptor_type();
2669 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
2671 Type
* bool_type
= Type::lookup_bool_type();
2673 Type
* slice_type
= Type::make_array_type(ptdt
, NULL
);
2675 Struct_type
* s
= Type::make_builtin_struct_type(4,
2677 "dotdotdot", bool_type
,
2681 ret
= Type::make_builtin_named_type("FuncType", s
);
2687 // The type descriptor for a function type.
2690 Function_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
2692 source_location bloc
= BUILTINS_LOCATION
;
2694 Type
* ftdt
= Function_type::make_function_type_descriptor_type();
2696 const Struct_field_list
* fields
= ftdt
->struct_type()->fields();
2698 Expression_list
* vals
= new Expression_list();
2701 Struct_field_list::const_iterator p
= fields
->begin();
2702 gcc_assert(p
->field_name() == "commonType");
2703 vals
->push_back(this->type_descriptor_constructor(gogo
,
2704 RUNTIME_TYPE_KIND_FUNC
,
2708 gcc_assert(p
->field_name() == "dotdotdot");
2709 vals
->push_back(Expression::make_boolean(this->is_varargs(), bloc
));
2712 gcc_assert(p
->field_name() == "in");
2713 vals
->push_back(this->type_descriptor_params(p
->type(), this->receiver(),
2714 this->parameters()));
2717 gcc_assert(p
->field_name() == "out");
2718 vals
->push_back(this->type_descriptor_params(p
->type(), NULL
,
2722 gcc_assert(p
== fields
->end());
2724 return Expression::make_struct_composite_literal(ftdt
, vals
, bloc
);
2727 // Return a composite literal for the parameters or results of a type
2731 Function_type::type_descriptor_params(Type
* params_type
,
2732 const Typed_identifier
* receiver
,
2733 const Typed_identifier_list
* params
)
2735 source_location bloc
= BUILTINS_LOCATION
;
2737 if (receiver
== NULL
&& params
== NULL
)
2738 return Expression::make_slice_composite_literal(params_type
, NULL
, bloc
);
2740 Expression_list
* vals
= new Expression_list();
2741 vals
->reserve((params
== NULL
? 0 : params
->size())
2742 + (receiver
!= NULL
? 1 : 0));
2744 if (receiver
!= NULL
)
2746 Type
* rtype
= receiver
->type();
2747 // The receiver is always passed as a pointer. FIXME: Is this
2748 // right? Should that fact affect the type descriptor?
2749 if (rtype
->points_to() == NULL
)
2750 rtype
= Type::make_pointer_type(rtype
);
2751 vals
->push_back(Expression::make_type_descriptor(rtype
, bloc
));
2756 for (Typed_identifier_list::const_iterator p
= params
->begin();
2759 vals
->push_back(Expression::make_type_descriptor(p
->type(), bloc
));
2762 return Expression::make_slice_composite_literal(params_type
, vals
, bloc
);
2765 // The reflection string.
2768 Function_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
2770 // FIXME: Turn this off until we straighten out the type of the
2771 // struct field used in a go statement which calls a method.
2772 // gcc_assert(this->receiver_ == NULL);
2774 ret
->append("func");
2776 if (this->receiver_
!= NULL
)
2778 ret
->push_back('(');
2779 this->append_reflection(this->receiver_
->type(), gogo
, ret
);
2780 ret
->push_back(')');
2783 ret
->push_back('(');
2784 const Typed_identifier_list
* params
= this->parameters();
2787 bool is_varargs
= this->is_varargs_
;
2788 for (Typed_identifier_list::const_iterator p
= params
->begin();
2792 if (p
!= params
->begin())
2794 if (!is_varargs
|| p
+ 1 != params
->end())
2795 this->append_reflection(p
->type(), gogo
, ret
);
2799 this->append_reflection(p
->type()->array_type()->element_type(),
2804 ret
->push_back(')');
2806 const Typed_identifier_list
* results
= this->results();
2807 if (results
!= NULL
&& !results
->empty())
2809 if (results
->size() == 1)
2810 ret
->push_back(' ');
2813 for (Typed_identifier_list::const_iterator p
= results
->begin();
2814 p
!= results
->end();
2817 if (p
!= results
->begin())
2819 this->append_reflection(p
->type(), gogo
, ret
);
2821 if (results
->size() > 1)
2822 ret
->push_back(')');
2829 Function_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
2831 ret
->push_back('F');
2833 if (this->receiver_
!= NULL
)
2835 ret
->push_back('m');
2836 this->append_mangled_name(this->receiver_
->type(), gogo
, ret
);
2839 const Typed_identifier_list
* params
= this->parameters();
2842 ret
->push_back('p');
2843 for (Typed_identifier_list::const_iterator p
= params
->begin();
2846 this->append_mangled_name(p
->type(), gogo
, ret
);
2847 if (this->is_varargs_
)
2848 ret
->push_back('V');
2849 ret
->push_back('e');
2852 const Typed_identifier_list
* results
= this->results();
2853 if (results
!= NULL
)
2855 ret
->push_back('r');
2856 for (Typed_identifier_list::const_iterator p
= results
->begin();
2857 p
!= results
->end();
2859 this->append_mangled_name(p
->type(), gogo
, ret
);
2860 ret
->push_back('e');
2863 ret
->push_back('e');
2866 // Export a function type.
2869 Function_type::do_export(Export
* exp
) const
2871 // We don't write out the receiver. The only function types which
2872 // should have a receiver are the ones associated with explicitly
2873 // defined methods. For those the receiver type is written out by
2874 // Function::export_func.
2876 exp
->write_c_string("(");
2878 if (this->parameters_
!= NULL
)
2880 bool is_varargs
= this->is_varargs_
;
2881 for (Typed_identifier_list::const_iterator p
=
2882 this->parameters_
->begin();
2883 p
!= this->parameters_
->end();
2889 exp
->write_c_string(", ");
2890 if (!is_varargs
|| p
+ 1 != this->parameters_
->end())
2891 exp
->write_type(p
->type());
2894 exp
->write_c_string("...");
2895 exp
->write_type(p
->type()->array_type()->element_type());
2899 exp
->write_c_string(")");
2901 const Typed_identifier_list
* results
= this->results_
;
2902 if (results
!= NULL
)
2904 exp
->write_c_string(" ");
2905 if (results
->size() == 1)
2906 exp
->write_type(results
->begin()->type());
2910 exp
->write_c_string("(");
2911 for (Typed_identifier_list::const_iterator p
= results
->begin();
2912 p
!= results
->end();
2918 exp
->write_c_string(", ");
2919 exp
->write_type(p
->type());
2921 exp
->write_c_string(")");
2926 // Import a function type.
2929 Function_type::do_import(Import
* imp
)
2931 imp
->require_c_string("(");
2932 Typed_identifier_list
* parameters
;
2933 bool is_varargs
= false;
2934 if (imp
->peek_char() == ')')
2938 parameters
= new Typed_identifier_list();
2941 if (imp
->match_c_string("..."))
2947 Type
* ptype
= imp
->read_type();
2949 ptype
= Type::make_array_type(ptype
, NULL
);
2950 parameters
->push_back(Typed_identifier(Import::import_marker
,
2951 ptype
, imp
->location()));
2952 if (imp
->peek_char() != ',')
2954 gcc_assert(!is_varargs
);
2955 imp
->require_c_string(", ");
2958 imp
->require_c_string(")");
2960 Typed_identifier_list
* results
;
2961 if (imp
->peek_char() != ' ')
2966 results
= new Typed_identifier_list
;
2967 if (imp
->peek_char() != '(')
2969 Type
* rtype
= imp
->read_type();
2970 results
->push_back(Typed_identifier(Import::import_marker
, rtype
,
2978 Type
* rtype
= imp
->read_type();
2979 results
->push_back(Typed_identifier(Import::import_marker
,
2980 rtype
, imp
->location()));
2981 if (imp
->peek_char() != ',')
2983 imp
->require_c_string(", ");
2985 imp
->require_c_string(")");
2989 Function_type
* ret
= Type::make_function_type(NULL
, parameters
, results
,
2992 ret
->set_is_varargs();
2996 // Make a copy of a function type without a receiver.
2999 Function_type::copy_without_receiver() const
3001 gcc_assert(this->is_method());
3002 Function_type
*ret
= Type::make_function_type(NULL
, this->parameters_
,
3005 if (this->is_varargs())
3006 ret
->set_is_varargs();
3007 if (this->is_builtin())
3008 ret
->set_is_builtin();
3012 // Make a copy of a function type with a receiver.
3015 Function_type::copy_with_receiver(Type
* receiver_type
) const
3017 gcc_assert(!this->is_method());
3018 Typed_identifier
* receiver
= new Typed_identifier("", receiver_type
,
3020 return Type::make_function_type(receiver
, this->parameters_
,
3021 this->results_
, this->location_
);
3024 // Make a function type.
3027 Type::make_function_type(Typed_identifier
* receiver
,
3028 Typed_identifier_list
* parameters
,
3029 Typed_identifier_list
* results
,
3030 source_location location
)
3032 return new Function_type(receiver
, parameters
, results
, location
);
3035 // Class Pointer_type.
3040 Pointer_type::do_traverse(Traverse
* traverse
)
3042 return Type::traverse(this->to_type_
, traverse
);
3048 Pointer_type::do_hash_for_method(Gogo
* gogo
) const
3050 return this->to_type_
->hash_for_method(gogo
) << 4;
3053 // The tree for a pointer type.
3056 Pointer_type::do_get_tree(Gogo
* gogo
)
3058 return build_pointer_type(this->to_type_
->get_tree(gogo
));
3061 // Initialize a pointer type.
3064 Pointer_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
3068 return fold_convert(type_tree
, null_pointer_node
);
3071 // The type of a pointer type descriptor.
3074 Pointer_type::make_pointer_type_descriptor_type()
3079 Type
* tdt
= Type::make_type_descriptor_type();
3080 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
3082 Struct_type
* s
= Type::make_builtin_struct_type(2,
3086 ret
= Type::make_builtin_named_type("PtrType", s
);
3092 // The type descriptor for a pointer type.
3095 Pointer_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
3097 if (this->is_unsafe_pointer_type())
3099 gcc_assert(name
!= NULL
);
3100 return this->plain_type_descriptor(gogo
,
3101 RUNTIME_TYPE_KIND_UNSAFE_POINTER
,
3106 source_location bloc
= BUILTINS_LOCATION
;
3108 const Methods
* methods
;
3109 Type
* deref
= this->points_to();
3110 if (deref
->named_type() != NULL
)
3111 methods
= deref
->named_type()->methods();
3112 else if (deref
->struct_type() != NULL
)
3113 methods
= deref
->struct_type()->methods();
3117 Type
* ptr_tdt
= Pointer_type::make_pointer_type_descriptor_type();
3119 const Struct_field_list
* fields
= ptr_tdt
->struct_type()->fields();
3121 Expression_list
* vals
= new Expression_list();
3124 Struct_field_list::const_iterator p
= fields
->begin();
3125 gcc_assert(p
->field_name() == "commonType");
3126 vals
->push_back(this->type_descriptor_constructor(gogo
,
3127 RUNTIME_TYPE_KIND_PTR
,
3128 name
, methods
, false));
3131 gcc_assert(p
->field_name() == "elem");
3132 vals
->push_back(Expression::make_type_descriptor(deref
, bloc
));
3134 return Expression::make_struct_composite_literal(ptr_tdt
, vals
, bloc
);
3138 // Reflection string.
3141 Pointer_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
3143 ret
->push_back('*');
3144 this->append_reflection(this->to_type_
, gogo
, ret
);
3150 Pointer_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
3152 ret
->push_back('p');
3153 this->append_mangled_name(this->to_type_
, gogo
, ret
);
3159 Pointer_type::do_export(Export
* exp
) const
3161 exp
->write_c_string("*");
3162 if (this->is_unsafe_pointer_type())
3163 exp
->write_c_string("any");
3165 exp
->write_type(this->to_type_
);
3171 Pointer_type::do_import(Import
* imp
)
3173 imp
->require_c_string("*");
3174 if (imp
->match_c_string("any"))
3177 return Type::make_pointer_type(Type::make_void_type());
3179 Type
* to
= imp
->read_type();
3180 return Type::make_pointer_type(to
);
3183 // Make a pointer type.
3186 Type::make_pointer_type(Type
* to_type
)
3188 typedef Unordered_map(Type
*, Pointer_type
*) Hashtable
;
3189 static Hashtable pointer_types
;
3190 Hashtable::const_iterator p
= pointer_types
.find(to_type
);
3191 if (p
!= pointer_types
.end())
3193 Pointer_type
* ret
= new Pointer_type(to_type
);
3194 pointer_types
[to_type
] = ret
;
3198 // The nil type. We use a special type for nil because it is not the
3199 // same as any other type. In C term nil has type void*, but there is
3200 // no such type in Go.
3202 class Nil_type
: public Type
3212 { return ptr_type_node
; }
3215 do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
3216 { return is_clear
? NULL
: fold_convert(type_tree
, null_pointer_node
); }
3219 do_type_descriptor(Gogo
*, Named_type
*)
3220 { gcc_unreachable(); }
3223 do_reflection(Gogo
*, std::string
*) const
3224 { gcc_unreachable(); }
3227 do_mangled_name(Gogo
*, std::string
* ret
) const
3228 { ret
->push_back('n'); }
3231 // Make the nil type.
3234 Type::make_nil_type()
3236 static Nil_type singleton_nil_type
;
3237 return &singleton_nil_type
;
3240 // The type of a function call which returns multiple values. This is
3241 // really a struct, but we don't want to confuse a function call which
3242 // returns a struct with a function call which returns multiple
3245 class Call_multiple_result_type
: public Type
3248 Call_multiple_result_type(Call_expression
* call
)
3249 : Type(TYPE_CALL_MULTIPLE_RESULT
),
3255 do_has_pointer() const
3256 { gcc_unreachable(); }
3262 do_get_init_tree(Gogo
*, tree
, bool)
3263 { gcc_unreachable(); }
3266 do_type_descriptor(Gogo
*, Named_type
*)
3267 { gcc_unreachable(); }
3270 do_reflection(Gogo
*, std::string
*) const
3271 { gcc_unreachable(); }
3274 do_mangled_name(Gogo
*, std::string
*) const
3275 { gcc_unreachable(); }
3278 // The expression being called.
3279 Call_expression
* call_
;
3282 // Return the tree for a call result.
3285 Call_multiple_result_type::do_get_tree(Gogo
* gogo
)
3287 Function_type
* fntype
= this->call_
->get_function_type();
3288 gcc_assert(fntype
!= NULL
);
3289 const Typed_identifier_list
* results
= fntype
->results();
3290 gcc_assert(results
!= NULL
&& results
->size() > 1);
3292 Struct_field_list
* sfl
= new Struct_field_list
;
3293 for (Typed_identifier_list::const_iterator p
= results
->begin();
3294 p
!= results
->end();
3297 const std::string name
= ((p
->name().empty()
3298 || p
->name() == Import::import_marker
)
3301 sfl
->push_back(Struct_field(Typed_identifier(name
, p
->type(),
3302 this->call_
->location())));
3304 return Type::make_struct_type(sfl
, this->call_
->location())->get_tree(gogo
);
3307 // Make a call result type.
3310 Type::make_call_multiple_result_type(Call_expression
* call
)
3312 return new Call_multiple_result_type(call
);
3315 // Class Struct_field.
3317 // Get the name of a field.
3320 Struct_field::field_name() const
3322 const std::string
& name(this->typed_identifier_
.name());
3327 // This is called during parsing, before anything is lowered, so
3328 // we have to be pretty careful to avoid dereferencing an
3329 // unknown type name.
3330 Type
* t
= this->typed_identifier_
.type();
3332 if (t
->classification() == Type::TYPE_POINTER
)
3335 Pointer_type
* ptype
= static_cast<Pointer_type
*>(t
);
3336 dt
= ptype
->points_to();
3338 if (dt
->forward_declaration_type() != NULL
)
3339 return dt
->forward_declaration_type()->name();
3340 else if (dt
->named_type() != NULL
)
3341 return dt
->named_type()->name();
3342 else if (t
->is_error_type() || dt
->is_error_type())
3344 static const std::string error_string
= "*error*";
3345 return error_string
;
3349 // Avoid crashing in the erroneous case where T is named but
3351 gcc_assert(t
!= dt
);
3352 if (t
->forward_declaration_type() != NULL
)
3353 return t
->forward_declaration_type()->name();
3354 else if (t
->named_type() != NULL
)
3355 return t
->named_type()->name();
3362 // Class Struct_type.
3367 Struct_type::do_traverse(Traverse
* traverse
)
3369 Struct_field_list
* fields
= this->fields_
;
3372 for (Struct_field_list::iterator p
= fields
->begin();
3376 if (Type::traverse(p
->type(), traverse
) == TRAVERSE_EXIT
)
3377 return TRAVERSE_EXIT
;
3380 return TRAVERSE_CONTINUE
;
3383 // Verify that the struct type is complete and valid.
3386 Struct_type::do_verify()
3388 Struct_field_list
* fields
= this->fields_
;
3392 for (Struct_field_list::iterator p
= fields
->begin();
3396 Type
* t
= p
->type();
3397 if (t
->is_undefined())
3399 error_at(p
->location(), "struct field type is incomplete");
3400 p
->set_type(Type::make_error_type());
3403 else if (p
->is_anonymous())
3405 if (t
->named_type() != NULL
&& t
->points_to() != NULL
)
3407 error_at(p
->location(), "embedded type may not be a pointer");
3408 p
->set_type(Type::make_error_type());
3416 // Whether this contains a pointer.
3419 Struct_type::do_has_pointer() const
3421 const Struct_field_list
* fields
= this->fields();
3424 for (Struct_field_list::const_iterator p
= fields
->begin();
3428 if (p
->type()->has_pointer())
3434 // Whether this type is identical to T.
3437 Struct_type::is_identical(const Struct_type
* t
,
3438 bool errors_are_identical
) const
3440 const Struct_field_list
* fields1
= this->fields();
3441 const Struct_field_list
* fields2
= t
->fields();
3442 if (fields1
== NULL
|| fields2
== NULL
)
3443 return fields1
== fields2
;
3444 Struct_field_list::const_iterator pf2
= fields2
->begin();
3445 for (Struct_field_list::const_iterator pf1
= fields1
->begin();
3446 pf1
!= fields1
->end();
3449 if (pf2
== fields2
->end())
3451 if (pf1
->field_name() != pf2
->field_name())
3453 if (pf1
->is_anonymous() != pf2
->is_anonymous()
3454 || !Type::are_identical(pf1
->type(), pf2
->type(),
3455 errors_are_identical
, NULL
))
3457 if (!pf1
->has_tag())
3464 if (!pf2
->has_tag())
3466 if (pf1
->tag() != pf2
->tag())
3470 if (pf2
!= fields2
->end())
3475 // Whether this struct type has any hidden fields.
3478 Struct_type::struct_has_hidden_fields(const Named_type
* within
,
3479 std::string
* reason
) const
3481 const Struct_field_list
* fields
= this->fields();
3484 const Package
* within_package
= (within
== NULL
3486 : within
->named_object()->package());
3487 for (Struct_field_list::const_iterator pf
= fields
->begin();
3488 pf
!= fields
->end();
3491 if (within_package
!= NULL
3492 && !pf
->is_anonymous()
3493 && Gogo::is_hidden_name(pf
->field_name()))
3497 std::string within_name
= within
->named_object()->message_name();
3498 std::string name
= Gogo::message_name(pf
->field_name());
3499 size_t bufsize
= 200 + within_name
.length() + name
.length();
3500 char* buf
= new char[bufsize
];
3501 snprintf(buf
, bufsize
,
3502 _("implicit assignment of %s%s%s hidden field %s%s%s"),
3503 open_quote
, within_name
.c_str(), close_quote
,
3504 open_quote
, name
.c_str(), close_quote
);
3505 reason
->assign(buf
);
3511 if (pf
->type()->has_hidden_fields(within
, reason
))
3521 Struct_type::do_hash_for_method(Gogo
* gogo
) const
3523 unsigned int ret
= 0;
3524 if (this->fields() != NULL
)
3526 for (Struct_field_list::const_iterator pf
= this->fields()->begin();
3527 pf
!= this->fields()->end();
3529 ret
= (ret
<< 1) + pf
->type()->hash_for_method(gogo
);
3534 // Find the local field NAME.
3537 Struct_type::find_local_field(const std::string
& name
,
3538 unsigned int *pindex
) const
3540 const Struct_field_list
* fields
= this->fields_
;
3544 for (Struct_field_list::const_iterator pf
= fields
->begin();
3545 pf
!= fields
->end();
3548 if (pf
->field_name() == name
)
3558 // Return an expression for field NAME in STRUCT_EXPR, or NULL.
3560 Field_reference_expression
*
3561 Struct_type::field_reference(Expression
* struct_expr
, const std::string
& name
,
3562 source_location location
) const
3565 return this->field_reference_depth(struct_expr
, name
, location
, &depth
);
3568 // Return an expression for a field, along with the depth at which it
3571 Field_reference_expression
*
3572 Struct_type::field_reference_depth(Expression
* struct_expr
,
3573 const std::string
& name
,
3574 source_location location
,
3575 unsigned int* depth
) const
3577 const Struct_field_list
* fields
= this->fields_
;
3581 // Look for a field with this name.
3583 for (Struct_field_list::const_iterator pf
= fields
->begin();
3584 pf
!= fields
->end();
3587 if (pf
->field_name() == name
)
3590 return Expression::make_field_reference(struct_expr
, i
, location
);
3594 // Look for an anonymous field which contains a field with this
3596 unsigned int found_depth
= 0;
3597 Field_reference_expression
* ret
= NULL
;
3599 for (Struct_field_list::const_iterator pf
= fields
->begin();
3600 pf
!= fields
->end();
3603 if (!pf
->is_anonymous())
3606 Struct_type
* st
= pf
->type()->deref()->struct_type();
3610 // Look for a reference using a NULL struct expression. If we
3611 // find one, fill in the struct expression with a reference to
3613 unsigned int subdepth
;
3614 Field_reference_expression
* sub
= st
->field_reference_depth(NULL
, name
,
3620 if (ret
== NULL
|| subdepth
< found_depth
)
3625 found_depth
= subdepth
;
3626 Expression
* here
= Expression::make_field_reference(struct_expr
, i
,
3628 if (pf
->type()->points_to() != NULL
)
3629 here
= Expression::make_unary(OPERATOR_MULT
, here
, location
);
3630 while (sub
->expr() != NULL
)
3632 sub
= sub
->expr()->deref()->field_reference_expression();
3633 gcc_assert(sub
!= NULL
);
3635 sub
->set_struct_expression(here
);
3637 else if (subdepth
> found_depth
)
3641 // We do not handle ambiguity here--it should be handled by
3642 // Type::bind_field_or_method.
3650 *depth
= found_depth
+ 1;
3655 // Return the total number of fields, including embedded fields.
3658 Struct_type::total_field_count() const
3660 if (this->fields_
== NULL
)
3662 unsigned int ret
= 0;
3663 for (Struct_field_list::const_iterator pf
= this->fields_
->begin();
3664 pf
!= this->fields_
->end();
3667 if (!pf
->is_anonymous() || pf
->type()->deref()->struct_type() == NULL
)
3670 ret
+= pf
->type()->struct_type()->total_field_count();
3675 // Return whether NAME is an unexported field, for better error reporting.
3678 Struct_type::is_unexported_local_field(Gogo
* gogo
,
3679 const std::string
& name
) const
3681 const Struct_field_list
* fields
= this->fields_
;
3684 for (Struct_field_list::const_iterator pf
= fields
->begin();
3685 pf
!= fields
->end();
3688 const std::string
& field_name(pf
->field_name());
3689 if (Gogo::is_hidden_name(field_name
)
3690 && name
== Gogo::unpack_hidden_name(field_name
)
3691 && gogo
->pack_hidden_name(name
, false) != field_name
)
3698 // Finalize the methods of an unnamed struct.
3701 Struct_type::finalize_methods(Gogo
* gogo
)
3703 if (this->all_methods_
!= NULL
)
3705 Type::finalize_methods(gogo
, this, this->location_
, &this->all_methods_
);
3708 // Return the method NAME, or NULL if there isn't one or if it is
3709 // ambiguous. Set *IS_AMBIGUOUS if the method exists but is
3713 Struct_type::method_function(const std::string
& name
, bool* is_ambiguous
) const
3715 return Type::method_function(this->all_methods_
, name
, is_ambiguous
);
3718 // Get the tree for a struct type.
3721 Struct_type::do_get_tree(Gogo
* gogo
)
3723 tree type
= make_node(RECORD_TYPE
);
3724 return this->fill_in_tree(gogo
, type
);
3727 // Fill in the fields for a struct type.
3730 Struct_type::fill_in_tree(Gogo
* gogo
, tree type
)
3732 tree field_trees
= NULL_TREE
;
3733 tree
* pp
= &field_trees
;
3734 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3735 p
!= this->fields_
->end();
3738 std::string name
= Gogo::unpack_hidden_name(p
->field_name());
3739 tree name_tree
= get_identifier_with_length(name
.data(), name
.length());
3740 tree field_type_tree
= p
->type()->get_tree(gogo
);
3741 if (field_type_tree
== error_mark_node
)
3742 return error_mark_node
;
3743 tree field
= build_decl(p
->location(), FIELD_DECL
, name_tree
,
3745 DECL_CONTEXT(field
) = type
;
3747 pp
= &DECL_CHAIN(field
);
3750 TYPE_FIELDS(type
) = field_trees
;
3757 // Initialize struct fields.
3760 Struct_type::do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
3762 if (this->fields_
== NULL
|| this->fields_
->empty())
3768 tree ret
= build_constructor(type_tree
,
3769 VEC_alloc(constructor_elt
, gc
, 0));
3770 TREE_CONSTANT(ret
) = 1;
3775 bool is_constant
= true;
3776 bool any_fields_set
= false;
3777 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
,
3778 this->fields_
->size());
3780 tree field
= TYPE_FIELDS(type_tree
);
3781 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3782 p
!= this->fields_
->end();
3783 ++p
, field
= DECL_CHAIN(field
))
3785 tree value
= p
->type()->get_init_tree(gogo
, is_clear
);
3786 if (value
== error_mark_node
)
3787 return error_mark_node
;
3788 gcc_assert(field
!= NULL_TREE
);
3791 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
3794 any_fields_set
= true;
3795 if (!TREE_CONSTANT(value
))
3796 is_constant
= false;
3799 gcc_assert(field
== NULL_TREE
);
3801 if (!any_fields_set
)
3803 gcc_assert(is_clear
);
3804 VEC_free(constructor_elt
, gc
, init
);
3808 tree ret
= build_constructor(type_tree
, init
);
3810 TREE_CONSTANT(ret
) = 1;
3814 // The type of a struct type descriptor.
3817 Struct_type::make_struct_type_descriptor_type()
3822 Type
* tdt
= Type::make_type_descriptor_type();
3823 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
3825 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
3826 Type
* string_type
= Type::lookup_string_type();
3827 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
3830 Type::make_builtin_struct_type(5,
3831 "name", pointer_string_type
,
3832 "pkgPath", pointer_string_type
,
3834 "tag", pointer_string_type
,
3835 "offset", uintptr_type
);
3836 Type
* nsf
= Type::make_builtin_named_type("structField", sf
);
3838 Type
* slice_type
= Type::make_array_type(nsf
, NULL
);
3840 Struct_type
* s
= Type::make_builtin_struct_type(2,
3842 "fields", slice_type
);
3844 ret
= Type::make_builtin_named_type("StructType", s
);
3850 // Build a type descriptor for a struct type.
3853 Struct_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
3855 source_location bloc
= BUILTINS_LOCATION
;
3857 Type
* stdt
= Struct_type::make_struct_type_descriptor_type();
3859 const Struct_field_list
* fields
= stdt
->struct_type()->fields();
3861 Expression_list
* vals
= new Expression_list();
3864 const Methods
* methods
= this->methods();
3865 // A named struct should not have methods--the methods should attach
3866 // to the named type.
3867 gcc_assert(methods
== NULL
|| name
== NULL
);
3869 Struct_field_list::const_iterator ps
= fields
->begin();
3870 gcc_assert(ps
->field_name() == "commonType");
3871 vals
->push_back(this->type_descriptor_constructor(gogo
,
3872 RUNTIME_TYPE_KIND_STRUCT
,
3873 name
, methods
, true));
3876 gcc_assert(ps
->field_name() == "fields");
3878 Expression_list
* elements
= new Expression_list();
3879 elements
->reserve(this->fields_
->size());
3880 Type
* element_type
= ps
->type()->array_type()->element_type();
3881 for (Struct_field_list::const_iterator pf
= this->fields_
->begin();
3882 pf
!= this->fields_
->end();
3885 const Struct_field_list
* f
= element_type
->struct_type()->fields();
3887 Expression_list
* fvals
= new Expression_list();
3890 Struct_field_list::const_iterator q
= f
->begin();
3891 gcc_assert(q
->field_name() == "name");
3892 if (pf
->is_anonymous())
3893 fvals
->push_back(Expression::make_nil(bloc
));
3896 std::string n
= Gogo::unpack_hidden_name(pf
->field_name());
3897 Expression
* s
= Expression::make_string(n
, bloc
);
3898 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3902 gcc_assert(q
->field_name() == "pkgPath");
3903 if (!Gogo::is_hidden_name(pf
->field_name()))
3904 fvals
->push_back(Expression::make_nil(bloc
));
3907 std::string n
= Gogo::hidden_name_prefix(pf
->field_name());
3908 Expression
* s
= Expression::make_string(n
, bloc
);
3909 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3913 gcc_assert(q
->field_name() == "typ");
3914 fvals
->push_back(Expression::make_type_descriptor(pf
->type(), bloc
));
3917 gcc_assert(q
->field_name() == "tag");
3919 fvals
->push_back(Expression::make_nil(bloc
));
3922 Expression
* s
= Expression::make_string(pf
->tag(), bloc
);
3923 fvals
->push_back(Expression::make_unary(OPERATOR_AND
, s
, bloc
));
3927 gcc_assert(q
->field_name() == "offset");
3928 fvals
->push_back(Expression::make_struct_field_offset(this, &*pf
));
3930 Expression
* v
= Expression::make_struct_composite_literal(element_type
,
3932 elements
->push_back(v
);
3935 vals
->push_back(Expression::make_slice_composite_literal(ps
->type(),
3938 return Expression::make_struct_composite_literal(stdt
, vals
, bloc
);
3941 // Reflection string.
3944 Struct_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
3946 ret
->append("struct { ");
3948 for (Struct_field_list::const_iterator p
= this->fields_
->begin();
3949 p
!= this->fields_
->end();
3952 if (p
!= this->fields_
->begin())
3954 if (p
->is_anonymous())
3955 ret
->push_back('?');
3957 ret
->append(Gogo::unpack_hidden_name(p
->field_name()));
3958 ret
->push_back(' ');
3959 this->append_reflection(p
->type(), gogo
, ret
);
3963 const std::string
& tag(p
->tag());
3965 for (std::string::const_iterator p
= tag
.begin();
3970 ret
->append("\\x00");
3971 else if (*p
== '\n')
3973 else if (*p
== '\t')
3976 ret
->append("\\\"");
3977 else if (*p
== '\\')
3978 ret
->append("\\\\");
3982 ret
->push_back('"');
3992 Struct_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
3994 ret
->push_back('S');
3996 const Struct_field_list
* fields
= this->fields_
;
3999 for (Struct_field_list::const_iterator p
= fields
->begin();
4003 if (p
->is_anonymous())
4007 std::string n
= Gogo::unpack_hidden_name(p
->field_name());
4009 snprintf(buf
, sizeof buf
, "%u_",
4010 static_cast<unsigned int>(n
.length()));
4014 this->append_mangled_name(p
->type(), gogo
, ret
);
4017 const std::string
& tag(p
->tag());
4019 for (std::string::const_iterator p
= tag
.begin();
4023 if (ISALNUM(*p
) || *p
== '_')
4028 snprintf(buf
, sizeof buf
, ".%x.",
4029 static_cast<unsigned int>(*p
));
4034 snprintf(buf
, sizeof buf
, "T%u_",
4035 static_cast<unsigned int>(out
.length()));
4042 ret
->push_back('e');
4048 Struct_type::do_export(Export
* exp
) const
4050 exp
->write_c_string("struct { ");
4051 const Struct_field_list
* fields
= this->fields_
;
4052 gcc_assert(fields
!= NULL
);
4053 for (Struct_field_list::const_iterator p
= fields
->begin();
4057 if (p
->is_anonymous())
4058 exp
->write_string("? ");
4061 exp
->write_string(p
->field_name());
4062 exp
->write_c_string(" ");
4064 exp
->write_type(p
->type());
4068 exp
->write_c_string(" ");
4069 Expression
* expr
= Expression::make_string(p
->tag(),
4071 expr
->export_expression(exp
);
4075 exp
->write_c_string("; ");
4077 exp
->write_c_string("}");
4083 Struct_type::do_import(Import
* imp
)
4085 imp
->require_c_string("struct { ");
4086 Struct_field_list
* fields
= new Struct_field_list
;
4087 if (imp
->peek_char() != '}')
4092 if (imp
->match_c_string("? "))
4096 name
= imp
->read_identifier();
4097 imp
->require_c_string(" ");
4099 Type
* ftype
= imp
->read_type();
4101 Struct_field
sf(Typed_identifier(name
, ftype
, imp
->location()));
4103 if (imp
->peek_char() == ' ')
4106 Expression
* expr
= Expression::import_expression(imp
);
4107 String_expression
* sexpr
= expr
->string_expression();
4108 gcc_assert(sexpr
!= NULL
);
4109 sf
.set_tag(sexpr
->val());
4113 imp
->require_c_string("; ");
4114 fields
->push_back(sf
);
4115 if (imp
->peek_char() == '}')
4119 imp
->require_c_string("}");
4121 return Type::make_struct_type(fields
, imp
->location());
4124 // Make a struct type.
4127 Type::make_struct_type(Struct_field_list
* fields
,
4128 source_location location
)
4130 return new Struct_type(fields
, location
);
4133 // Class Array_type.
4135 // Whether two array types are identical.
4138 Array_type::is_identical(const Array_type
* t
, bool errors_are_identical
) const
4140 if (!Type::are_identical(this->element_type(), t
->element_type(),
4141 errors_are_identical
, NULL
))
4144 Expression
* l1
= this->length();
4145 Expression
* l2
= t
->length();
4147 // Slices of the same element type are identical.
4148 if (l1
== NULL
&& l2
== NULL
)
4151 // Arrays of the same element type are identical if they have the
4153 if (l1
!= NULL
&& l2
!= NULL
)
4158 // Try to determine the lengths. If we can't, assume the arrays
4159 // are not identical.
4167 if (l1
->integer_constant_value(true, v1
, &type1
)
4168 && l2
->integer_constant_value(true, v2
, &type2
))
4169 ret
= mpz_cmp(v1
, v2
) == 0;
4175 // Otherwise the arrays are not identical.
4182 Array_type::do_traverse(Traverse
* traverse
)
4184 if (Type::traverse(this->element_type_
, traverse
) == TRAVERSE_EXIT
)
4185 return TRAVERSE_EXIT
;
4186 if (this->length_
!= NULL
4187 && Expression::traverse(&this->length_
, traverse
) == TRAVERSE_EXIT
)
4188 return TRAVERSE_EXIT
;
4189 return TRAVERSE_CONTINUE
;
4192 // Check that the length is valid.
4195 Array_type::verify_length()
4197 if (this->length_
== NULL
)
4199 if (!this->length_
->is_constant())
4201 error_at(this->length_
->location(), "array bound is not constant");
4207 Type
* t
= this->length_
->type();
4208 if (t
->integer_type() != NULL
)
4212 if (!this->length_
->integer_constant_value(true, val
, &vt
))
4214 error_at(this->length_
->location(),
4215 "array bound is not constant");
4220 else if (t
->float_type() != NULL
)
4225 if (!this->length_
->float_constant_value(fval
, &vt
))
4227 error_at(this->length_
->location(),
4228 "array bound is not constant");
4232 if (!mpfr_integer_p(fval
))
4234 error_at(this->length_
->location(),
4235 "array bound truncated to integer");
4240 mpfr_get_z(val
, fval
, GMP_RNDN
);
4245 if (!t
->is_error_type())
4246 error_at(this->length_
->location(), "array bound is not numeric");
4250 if (mpz_sgn(val
) < 0)
4252 error_at(this->length_
->location(), "negative array bound");
4257 Type
* int_type
= Type::lookup_integer_type("int");
4258 int tbits
= int_type
->integer_type()->bits();
4259 int vbits
= mpz_sizeinbase(val
, 2);
4260 if (vbits
+ 1 > tbits
)
4262 error_at(this->length_
->location(), "array bound overflows");
4275 Array_type::do_verify()
4277 if (!this->verify_length())
4279 this->length_
= Expression::make_error(this->length_
->location());
4285 // Array type hash code.
4288 Array_type::do_hash_for_method(Gogo
* gogo
) const
4290 // There is no very convenient way to get a hash code for the
4292 return this->element_type_
->hash_for_method(gogo
) + 1;
4295 // See if the expression passed to make is suitable. The first
4296 // argument is required, and gives the length. An optional second
4297 // argument is permitted for the capacity.
4300 Array_type::do_check_make_expression(Expression_list
* args
,
4301 source_location location
)
4303 gcc_assert(this->length_
== NULL
);
4304 if (args
== NULL
|| args
->empty())
4306 error_at(location
, "length required when allocating a slice");
4309 else if (args
->size() > 2)
4311 error_at(location
, "too many expressions passed to make");
4316 if (!Type::check_int_value(args
->front(),
4317 _("bad length when making slice"), location
))
4320 if (args
->size() > 1)
4322 if (!Type::check_int_value(args
->back(),
4323 _("bad capacity when making slice"),
4332 // Get a tree for the length of a fixed array. The length may be
4333 // computed using a function call, so we must only evaluate it once.
4336 Array_type::get_length_tree(Gogo
* gogo
)
4338 gcc_assert(this->length_
!= NULL
);
4339 if (this->length_tree_
== NULL_TREE
)
4344 if (this->length_
->integer_constant_value(true, val
, &t
))
4347 t
= Type::lookup_integer_type("int");
4348 else if (t
->is_abstract())
4349 t
= t
->make_non_abstract_type();
4350 tree tt
= t
->get_tree(gogo
);
4351 this->length_tree_
= Expression::integer_constant_tree(val
, tt
);
4358 // Make up a translation context for the array length
4359 // expression. FIXME: This won't work in general.
4360 Translate_context
context(gogo
, NULL
, NULL
, NULL_TREE
);
4361 tree len
= this->length_
->get_tree(&context
);
4362 if (len
!= error_mark_node
)
4364 len
= convert_to_integer(integer_type_node
, len
);
4365 len
= save_expr(len
);
4367 this->length_tree_
= len
;
4370 return this->length_tree_
;
4373 // Get a tree for the type of this array. A fixed array is simply
4374 // represented as ARRAY_TYPE with the appropriate index--i.e., it is
4375 // just like an array in C. An open array is a struct with three
4376 // fields: a data pointer, the length, and the capacity.
4379 Array_type::do_get_tree(Gogo
* gogo
)
4381 if (this->length_
== NULL
)
4383 tree struct_type
= gogo
->slice_type_tree(void_type_node
);
4384 return this->fill_in_tree(gogo
, struct_type
);
4388 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4389 tree length_tree
= this->get_length_tree(gogo
);
4390 if (element_type_tree
== error_mark_node
4391 || length_tree
== error_mark_node
)
4392 return error_mark_node
;
4394 length_tree
= fold_convert(sizetype
, length_tree
);
4396 // build_index_type takes the maximum index, which is one less
4398 tree index_type
= build_index_type(fold_build2(MINUS_EXPR
, sizetype
,
4402 return build_array_type(element_type_tree
, index_type
);
4406 // Fill in the fields for a slice type. This is used for named slice
4410 Array_type::fill_in_tree(Gogo
* gogo
, tree struct_type
)
4412 gcc_assert(this->length_
== NULL
);
4414 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4415 tree field
= TYPE_FIELDS(struct_type
);
4416 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__values") == 0);
4417 gcc_assert(POINTER_TYPE_P(TREE_TYPE(field
))
4418 && TREE_TYPE(TREE_TYPE(field
)) == void_type_node
);
4419 TREE_TYPE(field
) = build_pointer_type(element_type_tree
);
4424 // Return an initializer for an array type.
4427 Array_type::do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
4429 if (this->length_
== NULL
)
4436 gcc_assert(TREE_CODE(type_tree
) == RECORD_TYPE
);
4438 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
, 3);
4440 for (tree field
= TYPE_FIELDS(type_tree
);
4442 field
= DECL_CHAIN(field
))
4444 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
,
4447 elt
->value
= fold_convert(TREE_TYPE(field
), size_zero_node
);
4450 tree ret
= build_constructor(type_tree
, init
);
4451 TREE_CONSTANT(ret
) = 1;
4458 tree value
= this->element_type_
->get_init_tree(gogo
, is_clear
);
4461 if (value
== error_mark_node
)
4462 return error_mark_node
;
4464 tree length_tree
= this->get_length_tree(gogo
);
4465 if (length_tree
== error_mark_node
)
4466 return error_mark_node
;
4468 length_tree
= fold_convert(sizetype
, length_tree
);
4469 tree range
= build2(RANGE_EXPR
, sizetype
, size_zero_node
,
4470 fold_build2(MINUS_EXPR
, sizetype
,
4471 length_tree
, size_one_node
));
4472 tree ret
= build_constructor_single(type_tree
, range
, value
);
4473 if (TREE_CONSTANT(value
))
4474 TREE_CONSTANT(ret
) = 1;
4479 // Handle the builtin make function for a slice.
4482 Array_type::do_make_expression_tree(Translate_context
* context
,
4483 Expression_list
* args
,
4484 source_location location
)
4486 gcc_assert(this->length_
== NULL
);
4488 Gogo
* gogo
= context
->gogo();
4489 tree type_tree
= this->get_tree(gogo
);
4490 if (type_tree
== error_mark_node
)
4491 return error_mark_node
;
4493 tree values_field
= TYPE_FIELDS(type_tree
);
4494 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(values_field
)),
4497 tree count_field
= DECL_CHAIN(values_field
);
4498 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(count_field
)),
4501 tree element_type_tree
= this->element_type_
->get_tree(gogo
);
4502 if (element_type_tree
== error_mark_node
)
4503 return error_mark_node
;
4504 tree element_size_tree
= TYPE_SIZE_UNIT(element_type_tree
);
4506 tree value
= this->element_type_
->get_init_tree(gogo
, true);
4508 // The first argument is the number of elements, the optional second
4509 // argument is the capacity.
4510 gcc_assert(args
!= NULL
&& args
->size() >= 1 && args
->size() <= 2);
4512 tree length_tree
= args
->front()->get_tree(context
);
4513 if (length_tree
== error_mark_node
)
4514 return error_mark_node
;
4515 if (!DECL_P(length_tree
))
4516 length_tree
= save_expr(length_tree
);
4517 if (!INTEGRAL_TYPE_P(TREE_TYPE(length_tree
)))
4518 length_tree
= convert_to_integer(TREE_TYPE(count_field
), length_tree
);
4520 tree bad_index
= Expression::check_bounds(length_tree
,
4521 TREE_TYPE(count_field
),
4522 NULL_TREE
, location
);
4524 length_tree
= fold_convert_loc(location
, TREE_TYPE(count_field
), length_tree
);
4526 if (args
->size() == 1)
4527 capacity_tree
= length_tree
;
4530 capacity_tree
= args
->back()->get_tree(context
);
4531 if (capacity_tree
== error_mark_node
)
4532 return error_mark_node
;
4533 if (!DECL_P(capacity_tree
))
4534 capacity_tree
= save_expr(capacity_tree
);
4535 if (!INTEGRAL_TYPE_P(TREE_TYPE(capacity_tree
)))
4536 capacity_tree
= convert_to_integer(TREE_TYPE(count_field
),
4539 bad_index
= Expression::check_bounds(capacity_tree
,
4540 TREE_TYPE(count_field
),
4541 bad_index
, location
);
4543 tree chktype
= (((TYPE_SIZE(TREE_TYPE(capacity_tree
))
4544 > TYPE_SIZE(TREE_TYPE(length_tree
)))
4545 || ((TYPE_SIZE(TREE_TYPE(capacity_tree
))
4546 == TYPE_SIZE(TREE_TYPE(length_tree
)))
4547 && TYPE_UNSIGNED(TREE_TYPE(capacity_tree
))))
4548 ? TREE_TYPE(capacity_tree
)
4549 : TREE_TYPE(length_tree
));
4550 tree chk
= fold_build2_loc(location
, LT_EXPR
, boolean_type_node
,
4551 fold_convert_loc(location
, chktype
,
4553 fold_convert_loc(location
, chktype
,
4555 if (bad_index
== NULL_TREE
)
4558 bad_index
= fold_build2_loc(location
, TRUTH_OR_EXPR
, boolean_type_node
,
4561 capacity_tree
= fold_convert_loc(location
, TREE_TYPE(count_field
),
4565 tree size_tree
= fold_build2_loc(location
, MULT_EXPR
, sizetype
,
4567 fold_convert_loc(location
, sizetype
,
4570 tree chk
= fold_build2_loc(location
, TRUTH_AND_EXPR
, boolean_type_node
,
4571 fold_build2_loc(location
, GT_EXPR
,
4573 fold_convert_loc(location
,
4577 fold_build2_loc(location
, LT_EXPR
,
4579 size_tree
, element_size_tree
));
4580 if (bad_index
== NULL_TREE
)
4583 bad_index
= fold_build2_loc(location
, TRUTH_OR_EXPR
, boolean_type_node
,
4586 tree space
= context
->gogo()->allocate_memory(this->element_type_
,
4587 size_tree
, location
);
4589 if (value
!= NULL_TREE
)
4590 space
= save_expr(space
);
4592 space
= fold_convert(TREE_TYPE(values_field
), space
);
4594 if (bad_index
!= NULL_TREE
&& bad_index
!= boolean_false_node
)
4596 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_SLICE_OUT_OF_BOUNDS
,
4598 space
= build2(COMPOUND_EXPR
, TREE_TYPE(space
),
4599 build3(COND_EXPR
, void_type_node
,
4600 bad_index
, crash
, NULL_TREE
),
4604 tree constructor
= gogo
->slice_constructor(type_tree
, space
, length_tree
,
4607 if (value
== NULL_TREE
)
4609 // The array contents are zero initialized.
4613 // The elements must be initialized.
4615 tree max
= fold_build2_loc(location
, MINUS_EXPR
, TREE_TYPE(count_field
),
4617 fold_convert_loc(location
, TREE_TYPE(count_field
),
4620 tree array_type
= build_array_type(element_type_tree
,
4621 build_index_type(max
));
4623 tree value_pointer
= fold_convert_loc(location
,
4624 build_pointer_type(array_type
),
4627 tree range
= build2(RANGE_EXPR
, sizetype
, size_zero_node
, max
);
4628 tree space_init
= build_constructor_single(array_type
, range
, value
);
4630 return build2(COMPOUND_EXPR
, TREE_TYPE(space
),
4631 build2(MODIFY_EXPR
, void_type_node
,
4632 build_fold_indirect_ref(value_pointer
),
4637 // Return a tree for a pointer to the values in ARRAY.
4640 Array_type::value_pointer_tree(Gogo
*, tree array
) const
4643 if (this->length() != NULL
)
4646 ret
= fold_convert(build_pointer_type(TREE_TYPE(TREE_TYPE(array
))),
4647 build_fold_addr_expr(array
));
4652 tree field
= TYPE_FIELDS(TREE_TYPE(array
));
4653 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)),
4655 ret
= fold_build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
,
4658 if (TREE_CONSTANT(array
))
4659 TREE_CONSTANT(ret
) = 1;
4663 // Return a tree for the length of the array ARRAY which has this
4667 Array_type::length_tree(Gogo
* gogo
, tree array
)
4669 if (this->length_
!= NULL
)
4671 if (TREE_CODE(array
) == SAVE_EXPR
)
4672 return fold_convert(integer_type_node
, this->get_length_tree(gogo
));
4674 return omit_one_operand(integer_type_node
,
4675 this->get_length_tree(gogo
), array
);
4678 // This is an open array. We need to read the length field.
4680 tree type
= TREE_TYPE(array
);
4681 gcc_assert(TREE_CODE(type
) == RECORD_TYPE
);
4683 tree field
= DECL_CHAIN(TYPE_FIELDS(type
));
4684 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__count") == 0);
4686 tree ret
= build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
, NULL_TREE
);
4687 if (TREE_CONSTANT(array
))
4688 TREE_CONSTANT(ret
) = 1;
4692 // Return a tree for the capacity of the array ARRAY which has this
4696 Array_type::capacity_tree(Gogo
* gogo
, tree array
)
4698 if (this->length_
!= NULL
)
4699 return omit_one_operand(sizetype
, this->get_length_tree(gogo
), array
);
4701 // This is an open array. We need to read the capacity field.
4703 tree type
= TREE_TYPE(array
);
4704 gcc_assert(TREE_CODE(type
) == RECORD_TYPE
);
4706 tree field
= DECL_CHAIN(DECL_CHAIN(TYPE_FIELDS(type
)));
4707 gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field
)), "__capacity") == 0);
4709 return build3(COMPONENT_REF
, TREE_TYPE(field
), array
, field
, NULL_TREE
);
4715 Array_type::do_export(Export
* exp
) const
4717 exp
->write_c_string("[");
4718 if (this->length_
!= NULL
)
4719 this->length_
->export_expression(exp
);
4720 exp
->write_c_string("] ");
4721 exp
->write_type(this->element_type_
);
4727 Array_type::do_import(Import
* imp
)
4729 imp
->require_c_string("[");
4731 if (imp
->peek_char() == ']')
4734 length
= Expression::import_expression(imp
);
4735 imp
->require_c_string("] ");
4736 Type
* element_type
= imp
->read_type();
4737 return Type::make_array_type(element_type
, length
);
4740 // The type of an array type descriptor.
4743 Array_type::make_array_type_descriptor_type()
4748 Type
* tdt
= Type::make_type_descriptor_type();
4749 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
4751 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
4754 Type::make_builtin_struct_type(3,
4757 "len", uintptr_type
);
4759 ret
= Type::make_builtin_named_type("ArrayType", sf
);
4765 // The type of an slice type descriptor.
4768 Array_type::make_slice_type_descriptor_type()
4773 Type
* tdt
= Type::make_type_descriptor_type();
4774 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
4777 Type::make_builtin_struct_type(2,
4781 ret
= Type::make_builtin_named_type("SliceType", sf
);
4787 // Build a type descriptor for an array/slice type.
4790 Array_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4792 if (this->length_
!= NULL
)
4793 return this->array_type_descriptor(gogo
, name
);
4795 return this->slice_type_descriptor(gogo
, name
);
4798 // Build a type descriptor for an array type.
4801 Array_type::array_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4803 source_location bloc
= BUILTINS_LOCATION
;
4805 Type
* atdt
= Array_type::make_array_type_descriptor_type();
4807 const Struct_field_list
* fields
= atdt
->struct_type()->fields();
4809 Expression_list
* vals
= new Expression_list();
4812 Struct_field_list::const_iterator p
= fields
->begin();
4813 gcc_assert(p
->field_name() == "commonType");
4814 vals
->push_back(this->type_descriptor_constructor(gogo
,
4815 RUNTIME_TYPE_KIND_ARRAY
,
4819 gcc_assert(p
->field_name() == "elem");
4820 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
4823 gcc_assert(p
->field_name() == "len");
4824 vals
->push_back(this->length_
);
4827 gcc_assert(p
== fields
->end());
4829 return Expression::make_struct_composite_literal(atdt
, vals
, bloc
);
4832 // Build a type descriptor for a slice type.
4835 Array_type::slice_type_descriptor(Gogo
* gogo
, Named_type
* name
)
4837 source_location bloc
= BUILTINS_LOCATION
;
4839 Type
* stdt
= Array_type::make_slice_type_descriptor_type();
4841 const Struct_field_list
* fields
= stdt
->struct_type()->fields();
4843 Expression_list
* vals
= new Expression_list();
4846 Struct_field_list::const_iterator p
= fields
->begin();
4847 gcc_assert(p
->field_name() == "commonType");
4848 vals
->push_back(this->type_descriptor_constructor(gogo
,
4849 RUNTIME_TYPE_KIND_SLICE
,
4853 gcc_assert(p
->field_name() == "elem");
4854 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
4857 gcc_assert(p
== fields
->end());
4859 return Expression::make_struct_composite_literal(stdt
, vals
, bloc
);
4862 // Reflection string.
4865 Array_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
4867 ret
->push_back('[');
4868 if (this->length_
!= NULL
)
4873 if (!this->length_
->integer_constant_value(true, val
, &type
))
4874 error_at(this->length_
->location(),
4875 "array length must be integer constant expression");
4876 else if (mpz_cmp_si(val
, 0) < 0)
4877 error_at(this->length_
->location(), "array length is negative");
4878 else if (mpz_cmp_ui(val
, mpz_get_ui(val
)) != 0)
4879 error_at(this->length_
->location(), "array length is too large");
4883 snprintf(buf
, sizeof buf
, "%lu", mpz_get_ui(val
));
4888 ret
->push_back(']');
4890 this->append_reflection(this->element_type_
, gogo
, ret
);
4896 Array_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
4898 ret
->push_back('A');
4899 this->append_mangled_name(this->element_type_
, gogo
, ret
);
4900 if (this->length_
!= NULL
)
4905 if (!this->length_
->integer_constant_value(true, val
, &type
))
4906 error_at(this->length_
->location(),
4907 "array length must be integer constant expression");
4908 else if (mpz_cmp_si(val
, 0) < 0)
4909 error_at(this->length_
->location(), "array length is negative");
4910 else if (mpz_cmp_ui(val
, mpz_get_ui(val
)) != 0)
4911 error_at(this->length_
->location(), "array size is too large");
4915 snprintf(buf
, sizeof buf
, "%lu", mpz_get_ui(val
));
4920 ret
->push_back('e');
4923 // Make an array type.
4926 Type::make_array_type(Type
* element_type
, Expression
* length
)
4928 return new Array_type(element_type
, length
);
4936 Map_type::do_traverse(Traverse
* traverse
)
4938 if (Type::traverse(this->key_type_
, traverse
) == TRAVERSE_EXIT
4939 || Type::traverse(this->val_type_
, traverse
) == TRAVERSE_EXIT
)
4940 return TRAVERSE_EXIT
;
4941 return TRAVERSE_CONTINUE
;
4944 // Check that the map type is OK.
4947 Map_type::do_verify()
4949 if (this->key_type_
->struct_type() != NULL
4950 || this->key_type_
->array_type() != NULL
)
4952 error_at(this->location_
, "invalid map key type");
4958 // Whether two map types are identical.
4961 Map_type::is_identical(const Map_type
* t
, bool errors_are_identical
) const
4963 return (Type::are_identical(this->key_type(), t
->key_type(),
4964 errors_are_identical
, NULL
)
4965 && Type::are_identical(this->val_type(), t
->val_type(),
4966 errors_are_identical
, NULL
));
4972 Map_type::do_hash_for_method(Gogo
* gogo
) const
4974 return (this->key_type_
->hash_for_method(gogo
)
4975 + this->val_type_
->hash_for_method(gogo
)
4979 // Check that a call to the builtin make function is valid. For a map
4980 // the optional argument is the number of spaces to preallocate for
4984 Map_type::do_check_make_expression(Expression_list
* args
,
4985 source_location location
)
4987 if (args
!= NULL
&& !args
->empty())
4989 if (!Type::check_int_value(args
->front(), _("bad size when making map"),
4992 else if (args
->size() > 1)
4994 error_at(location
, "too many arguments when making map");
5001 // Get a tree for a map type. A map type is represented as a pointer
5002 // to a struct. The struct is __go_map in libgo/map.h.
5005 Map_type::do_get_tree(Gogo
* gogo
)
5007 static tree type_tree
;
5008 if (type_tree
== NULL_TREE
)
5010 tree struct_type
= make_node(RECORD_TYPE
);
5012 tree map_descriptor_type
= gogo
->map_descriptor_type();
5013 tree const_map_descriptor_type
=
5014 build_qualified_type(map_descriptor_type
, TYPE_QUAL_CONST
);
5015 tree name
= get_identifier("__descriptor");
5016 tree field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
,
5017 build_pointer_type(const_map_descriptor_type
));
5018 DECL_CONTEXT(field
) = struct_type
;
5019 TYPE_FIELDS(struct_type
) = field
;
5020 tree last_field
= field
;
5022 name
= get_identifier("__element_count");
5023 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
, sizetype
);
5024 DECL_CONTEXT(field
) = struct_type
;
5025 DECL_CHAIN(last_field
) = field
;
5028 name
= get_identifier("__bucket_count");
5029 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
, sizetype
);
5030 DECL_CONTEXT(field
) = struct_type
;
5031 DECL_CHAIN(last_field
) = field
;
5034 name
= get_identifier("__buckets");
5035 field
= build_decl(BUILTINS_LOCATION
, FIELD_DECL
, name
,
5036 build_pointer_type(ptr_type_node
));
5037 DECL_CONTEXT(field
) = struct_type
;
5038 DECL_CHAIN(last_field
) = field
;
5040 layout_type(struct_type
);
5042 // Give the struct a name for better debugging info.
5043 name
= get_identifier("__go_map");
5044 tree type_decl
= build_decl(BUILTINS_LOCATION
, TYPE_DECL
, name
,
5046 DECL_ARTIFICIAL(type_decl
) = 1;
5047 TYPE_NAME(struct_type
) = type_decl
;
5048 go_preserve_from_gc(type_decl
);
5049 rest_of_decl_compilation(type_decl
, 1, 0);
5051 type_tree
= build_pointer_type(struct_type
);
5052 go_preserve_from_gc(type_tree
);
5058 // Initialize a map.
5061 Map_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
5065 return fold_convert(type_tree
, null_pointer_node
);
5068 // Return an expression for a newly allocated map.
5071 Map_type::do_make_expression_tree(Translate_context
* context
,
5072 Expression_list
* args
,
5073 source_location location
)
5075 tree bad_index
= NULL_TREE
;
5078 if (args
== NULL
|| args
->empty())
5079 expr_tree
= size_zero_node
;
5082 expr_tree
= args
->front()->get_tree(context
);
5083 if (expr_tree
== error_mark_node
)
5084 return error_mark_node
;
5085 if (!DECL_P(expr_tree
))
5086 expr_tree
= save_expr(expr_tree
);
5087 if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree
)))
5088 expr_tree
= convert_to_integer(sizetype
, expr_tree
);
5089 bad_index
= Expression::check_bounds(expr_tree
, sizetype
, bad_index
,
5093 tree map_type
= this->get_tree(context
->gogo());
5095 static tree new_map_fndecl
;
5096 tree ret
= Gogo::call_builtin(&new_map_fndecl
,
5101 TREE_TYPE(TYPE_FIELDS(TREE_TYPE(map_type
))),
5102 context
->gogo()->map_descriptor(this),
5105 if (ret
== error_mark_node
)
5106 return error_mark_node
;
5107 // This can panic if the capacity is out of range.
5108 TREE_NOTHROW(new_map_fndecl
) = 0;
5110 if (bad_index
== NULL_TREE
)
5114 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_MAP_OUT_OF_BOUNDS
,
5116 return build2(COMPOUND_EXPR
, TREE_TYPE(ret
),
5117 build3(COND_EXPR
, void_type_node
,
5118 bad_index
, crash
, NULL_TREE
),
5123 // The type of a map type descriptor.
5126 Map_type::make_map_type_descriptor_type()
5131 Type
* tdt
= Type::make_type_descriptor_type();
5132 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
5135 Type::make_builtin_struct_type(3,
5140 ret
= Type::make_builtin_named_type("MapType", sf
);
5146 // Build a type descriptor for a map type.
5149 Map_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
5151 source_location bloc
= BUILTINS_LOCATION
;
5153 Type
* mtdt
= Map_type::make_map_type_descriptor_type();
5155 const Struct_field_list
* fields
= mtdt
->struct_type()->fields();
5157 Expression_list
* vals
= new Expression_list();
5160 Struct_field_list::const_iterator p
= fields
->begin();
5161 gcc_assert(p
->field_name() == "commonType");
5162 vals
->push_back(this->type_descriptor_constructor(gogo
,
5163 RUNTIME_TYPE_KIND_MAP
,
5167 gcc_assert(p
->field_name() == "key");
5168 vals
->push_back(Expression::make_type_descriptor(this->key_type_
, bloc
));
5171 gcc_assert(p
->field_name() == "elem");
5172 vals
->push_back(Expression::make_type_descriptor(this->val_type_
, bloc
));
5175 gcc_assert(p
== fields
->end());
5177 return Expression::make_struct_composite_literal(mtdt
, vals
, bloc
);
5180 // Reflection string for a map.
5183 Map_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
5185 ret
->append("map[");
5186 this->append_reflection(this->key_type_
, gogo
, ret
);
5188 this->append_reflection(this->val_type_
, gogo
, ret
);
5191 // Mangled name for a map.
5194 Map_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
5196 ret
->push_back('M');
5197 this->append_mangled_name(this->key_type_
, gogo
, ret
);
5199 this->append_mangled_name(this->val_type_
, gogo
, ret
);
5202 // Export a map type.
5205 Map_type::do_export(Export
* exp
) const
5207 exp
->write_c_string("map [");
5208 exp
->write_type(this->key_type_
);
5209 exp
->write_c_string("] ");
5210 exp
->write_type(this->val_type_
);
5213 // Import a map type.
5216 Map_type::do_import(Import
* imp
)
5218 imp
->require_c_string("map [");
5219 Type
* key_type
= imp
->read_type();
5220 imp
->require_c_string("] ");
5221 Type
* val_type
= imp
->read_type();
5222 return Type::make_map_type(key_type
, val_type
, imp
->location());
5228 Type::make_map_type(Type
* key_type
, Type
* val_type
, source_location location
)
5230 return new Map_type(key_type
, val_type
, location
);
5233 // Class Channel_type.
5238 Channel_type::do_hash_for_method(Gogo
* gogo
) const
5240 unsigned int ret
= 0;
5241 if (this->may_send_
)
5243 if (this->may_receive_
)
5245 if (this->element_type_
!= NULL
)
5246 ret
+= this->element_type_
->hash_for_method(gogo
) << 2;
5250 // Whether this type is the same as T.
5253 Channel_type::is_identical(const Channel_type
* t
,
5254 bool errors_are_identical
) const
5256 if (!Type::are_identical(this->element_type(), t
->element_type(),
5257 errors_are_identical
, NULL
))
5259 return (this->may_send_
== t
->may_send_
5260 && this->may_receive_
== t
->may_receive_
);
5263 // Check whether the parameters for a call to the builtin function
5264 // make are OK for a channel. A channel can take an optional single
5265 // parameter which is the buffer size.
5268 Channel_type::do_check_make_expression(Expression_list
* args
,
5269 source_location location
)
5271 if (args
!= NULL
&& !args
->empty())
5273 if (!Type::check_int_value(args
->front(),
5274 _("bad buffer size when making channel"),
5277 else if (args
->size() > 1)
5279 error_at(location
, "too many arguments when making channel");
5286 // Return the tree for a channel type. A channel is a pointer to a
5287 // __go_channel struct. The __go_channel struct is defined in
5288 // libgo/runtime/channel.h.
5291 Channel_type::do_get_tree(Gogo
*)
5293 static tree type_tree
;
5294 if (type_tree
== NULL_TREE
)
5296 tree ret
= make_node(RECORD_TYPE
);
5297 TYPE_NAME(ret
) = get_identifier("__go_channel");
5298 TYPE_STUB_DECL(ret
) = build_decl(BUILTINS_LOCATION
, TYPE_DECL
, NULL_TREE
,
5300 type_tree
= build_pointer_type(ret
);
5301 go_preserve_from_gc(type_tree
);
5306 // Initialize a channel variable.
5309 Channel_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
5313 return fold_convert(type_tree
, null_pointer_node
);
5316 // Handle the builtin function make for a channel.
5319 Channel_type::do_make_expression_tree(Translate_context
* context
,
5320 Expression_list
* args
,
5321 source_location location
)
5323 Gogo
* gogo
= context
->gogo();
5324 tree channel_type
= this->get_tree(gogo
);
5326 tree element_tree
= this->element_type_
->get_tree(gogo
);
5327 tree element_size_tree
= size_in_bytes(element_tree
);
5329 tree bad_index
= NULL_TREE
;
5332 if (args
== NULL
|| args
->empty())
5333 expr_tree
= size_zero_node
;
5336 expr_tree
= args
->front()->get_tree(context
);
5337 if (expr_tree
== error_mark_node
)
5338 return error_mark_node
;
5339 if (!DECL_P(expr_tree
))
5340 expr_tree
= save_expr(expr_tree
);
5341 if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree
)))
5342 expr_tree
= convert_to_integer(sizetype
, expr_tree
);
5343 bad_index
= Expression::check_bounds(expr_tree
, sizetype
, bad_index
,
5347 static tree new_channel_fndecl
;
5348 tree ret
= Gogo::call_builtin(&new_channel_fndecl
,
5357 if (ret
== error_mark_node
)
5358 return error_mark_node
;
5359 // This can panic if the capacity is out of range.
5360 TREE_NOTHROW(new_channel_fndecl
) = 0;
5362 if (bad_index
== NULL_TREE
)
5366 tree crash
= Gogo::runtime_error(RUNTIME_ERROR_MAKE_CHAN_OUT_OF_BOUNDS
,
5368 return build2(COMPOUND_EXPR
, TREE_TYPE(ret
),
5369 build3(COND_EXPR
, void_type_node
,
5370 bad_index
, crash
, NULL_TREE
),
5375 // Build a type descriptor for a channel type.
5378 Channel_type::make_chan_type_descriptor_type()
5383 Type
* tdt
= Type::make_type_descriptor_type();
5384 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
5386 Type
* uintptr_type
= Type::lookup_integer_type("uintptr");
5389 Type::make_builtin_struct_type(3,
5392 "dir", uintptr_type
);
5394 ret
= Type::make_builtin_named_type("ChanType", sf
);
5400 // Build a type descriptor for a map type.
5403 Channel_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
5405 source_location bloc
= BUILTINS_LOCATION
;
5407 Type
* ctdt
= Channel_type::make_chan_type_descriptor_type();
5409 const Struct_field_list
* fields
= ctdt
->struct_type()->fields();
5411 Expression_list
* vals
= new Expression_list();
5414 Struct_field_list::const_iterator p
= fields
->begin();
5415 gcc_assert(p
->field_name() == "commonType");
5416 vals
->push_back(this->type_descriptor_constructor(gogo
,
5417 RUNTIME_TYPE_KIND_CHAN
,
5421 gcc_assert(p
->field_name() == "elem");
5422 vals
->push_back(Expression::make_type_descriptor(this->element_type_
, bloc
));
5425 gcc_assert(p
->field_name() == "dir");
5426 // These bits must match the ones in libgo/runtime/go-type.h.
5428 if (this->may_receive_
)
5430 if (this->may_send_
)
5433 mpz_init_set_ui(iv
, val
);
5434 vals
->push_back(Expression::make_integer(&iv
, p
->type(), bloc
));
5438 gcc_assert(p
== fields
->end());
5440 return Expression::make_struct_composite_literal(ctdt
, vals
, bloc
);
5443 // Reflection string.
5446 Channel_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
5448 if (!this->may_send_
)
5450 ret
->append("chan");
5451 if (!this->may_receive_
)
5453 ret
->push_back(' ');
5454 this->append_reflection(this->element_type_
, gogo
, ret
);
5460 Channel_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
5462 ret
->push_back('C');
5463 this->append_mangled_name(this->element_type_
, gogo
, ret
);
5464 if (this->may_send_
)
5465 ret
->push_back('s');
5466 if (this->may_receive_
)
5467 ret
->push_back('r');
5468 ret
->push_back('e');
5474 Channel_type::do_export(Export
* exp
) const
5476 exp
->write_c_string("chan ");
5477 if (this->may_send_
&& !this->may_receive_
)
5478 exp
->write_c_string("-< ");
5479 else if (this->may_receive_
&& !this->may_send_
)
5480 exp
->write_c_string("<- ");
5481 exp
->write_type(this->element_type_
);
5487 Channel_type::do_import(Import
* imp
)
5489 imp
->require_c_string("chan ");
5493 if (imp
->match_c_string("-< "))
5497 may_receive
= false;
5499 else if (imp
->match_c_string("<- "))
5511 Type
* element_type
= imp
->read_type();
5513 return Type::make_channel_type(may_send
, may_receive
, element_type
);
5516 // Make a new channel type.
5519 Type::make_channel_type(bool send
, bool receive
, Type
* element_type
)
5521 return new Channel_type(send
, receive
, element_type
);
5524 // Class Interface_type.
5529 Interface_type::do_traverse(Traverse
* traverse
)
5531 if (this->methods_
== NULL
)
5532 return TRAVERSE_CONTINUE
;
5533 return this->methods_
->traverse(traverse
);
5536 // Finalize the methods. This handles interface inheritance.
5539 Interface_type::finalize_methods()
5541 if (this->methods_
== NULL
)
5543 bool is_recursive
= false;
5546 while (from
< this->methods_
->size())
5548 const Typed_identifier
* p
= &this->methods_
->at(from
);
5549 if (!p
->name().empty())
5552 for (i
= 0; i
< to
; ++i
)
5554 if (this->methods_
->at(i
).name() == p
->name())
5556 error_at(p
->location(), "duplicate method %qs",
5557 Gogo::message_name(p
->name()).c_str());
5564 this->methods_
->set(to
, *p
);
5570 Interface_type
* it
= p
->type()->interface_type();
5573 error_at(p
->location(), "interface contains embedded non-interface");
5581 error_at(p
->location(), "invalid recursive interface");
5582 is_recursive
= true;
5587 const Typed_identifier_list
* methods
= it
->methods();
5588 if (methods
== NULL
)
5593 for (Typed_identifier_list::const_iterator q
= methods
->begin();
5594 q
!= methods
->end();
5597 if (q
->name().empty() || this->find_method(q
->name()) == NULL
)
5598 this->methods_
->push_back(Typed_identifier(q
->name(), q
->type(),
5603 error_at(p
->location(), "inherited method %qs is ambiguous",
5604 Gogo::message_name(q
->name()).c_str());
5611 delete this->methods_
;
5612 this->methods_
= NULL
;
5616 this->methods_
->resize(to
);
5617 this->methods_
->sort_by_name();
5621 // Return the method NAME, or NULL.
5623 const Typed_identifier
*
5624 Interface_type::find_method(const std::string
& name
) const
5626 if (this->methods_
== NULL
)
5628 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5629 p
!= this->methods_
->end();
5631 if (p
->name() == name
)
5636 // Return the method index.
5639 Interface_type::method_index(const std::string
& name
) const
5641 gcc_assert(this->methods_
!= NULL
);
5643 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5644 p
!= this->methods_
->end();
5646 if (p
->name() == name
)
5651 // Return whether NAME is an unexported method, for better error
5655 Interface_type::is_unexported_method(Gogo
* gogo
, const std::string
& name
) const
5657 if (this->methods_
== NULL
)
5659 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5660 p
!= this->methods_
->end();
5663 const std::string
& method_name(p
->name());
5664 if (Gogo::is_hidden_name(method_name
)
5665 && name
== Gogo::unpack_hidden_name(method_name
)
5666 && gogo
->pack_hidden_name(name
, false) != method_name
)
5672 // Whether this type is identical with T.
5675 Interface_type::is_identical(const Interface_type
* t
,
5676 bool errors_are_identical
) const
5678 // We require the same methods with the same types. The methods
5679 // have already been sorted.
5680 if (this->methods() == NULL
|| t
->methods() == NULL
)
5681 return this->methods() == t
->methods();
5683 Typed_identifier_list::const_iterator p1
= this->methods()->begin();
5684 for (Typed_identifier_list::const_iterator p2
= t
->methods()->begin();
5685 p2
!= t
->methods()->end();
5688 if (p1
== this->methods()->end())
5690 if (p1
->name() != p2
->name()
5691 || !Type::are_identical(p1
->type(), p2
->type(),
5692 errors_are_identical
, NULL
))
5695 if (p1
!= this->methods()->end())
5700 // Whether we can assign the interface type T to this type. The types
5701 // are known to not be identical. An interface assignment is only
5702 // permitted if T is known to implement all methods in THIS.
5703 // Otherwise a type guard is required.
5706 Interface_type::is_compatible_for_assign(const Interface_type
* t
,
5707 std::string
* reason
) const
5709 if (this->methods() == NULL
)
5711 for (Typed_identifier_list::const_iterator p
= this->methods()->begin();
5712 p
!= this->methods()->end();
5715 const Typed_identifier
* m
= t
->find_method(p
->name());
5721 snprintf(buf
, sizeof buf
,
5722 _("need explicit conversion; missing method %s%s%s"),
5723 open_quote
, Gogo::message_name(p
->name()).c_str(),
5725 reason
->assign(buf
);
5730 std::string subreason
;
5731 if (!Type::are_identical(p
->type(), m
->type(), true, &subreason
))
5735 std::string n
= Gogo::message_name(p
->name());
5736 size_t len
= 100 + n
.length() + subreason
.length();
5737 char* buf
= new char[len
];
5738 if (subreason
.empty())
5739 snprintf(buf
, len
, _("incompatible type for method %s%s%s"),
5740 open_quote
, n
.c_str(), close_quote
);
5743 _("incompatible type for method %s%s%s (%s)"),
5744 open_quote
, n
.c_str(), close_quote
,
5746 reason
->assign(buf
);
5759 Interface_type::do_hash_for_method(Gogo
* gogo
) const
5761 unsigned int ret
= 0;
5762 if (this->methods_
!= NULL
)
5764 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5765 p
!= this->methods_
->end();
5768 ret
= Type::hash_string(p
->name(), ret
);
5769 ret
+= p
->type()->hash_for_method(gogo
);
5776 // Return true if T implements the interface. If it does not, and
5777 // REASON is not NULL, set *REASON to a useful error message.
5780 Interface_type::implements_interface(const Type
* t
, std::string
* reason
) const
5782 if (this->methods_
== NULL
)
5785 bool is_pointer
= false;
5786 const Named_type
* nt
= t
->named_type();
5787 const Struct_type
* st
= t
->struct_type();
5788 // If we start with a named type, we don't dereference it to find
5792 const Type
* pt
= t
->points_to();
5795 // If T is a pointer to a named type, then we need to look at
5796 // the type to which it points.
5798 nt
= pt
->named_type();
5799 st
= pt
->struct_type();
5803 // If we have a named type, get the methods from it rather than from
5808 // Only named and struct types have methods.
5809 if (nt
== NULL
&& st
== NULL
)
5813 if (t
->points_to() != NULL
5814 && t
->points_to()->interface_type() != NULL
)
5815 reason
->assign(_("pointer to interface type has no methods"));
5817 reason
->assign(_("type has no methods"));
5822 if (nt
!= NULL
? !nt
->has_any_methods() : !st
->has_any_methods())
5826 if (t
->points_to() != NULL
5827 && t
->points_to()->interface_type() != NULL
)
5828 reason
->assign(_("pointer to interface type has no methods"));
5830 reason
->assign(_("type has no methods"));
5835 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5836 p
!= this->methods_
->end();
5839 bool is_ambiguous
= false;
5840 Method
* m
= (nt
!= NULL
5841 ? nt
->method_function(p
->name(), &is_ambiguous
)
5842 : st
->method_function(p
->name(), &is_ambiguous
));
5847 std::string n
= Gogo::message_name(p
->name());
5848 size_t len
= n
.length() + 100;
5849 char* buf
= new char[len
];
5851 snprintf(buf
, len
, _("ambiguous method %s%s%s"),
5852 open_quote
, n
.c_str(), close_quote
);
5854 snprintf(buf
, len
, _("missing method %s%s%s"),
5855 open_quote
, n
.c_str(), close_quote
);
5856 reason
->assign(buf
);
5862 Function_type
*p_fn_type
= p
->type()->function_type();
5863 Function_type
* m_fn_type
= m
->type()->function_type();
5864 gcc_assert(p_fn_type
!= NULL
&& m_fn_type
!= NULL
);
5865 std::string subreason
;
5866 if (!p_fn_type
->is_identical(m_fn_type
, true, true, &subreason
))
5870 std::string n
= Gogo::message_name(p
->name());
5871 size_t len
= 100 + n
.length() + subreason
.length();
5872 char* buf
= new char[len
];
5873 if (subreason
.empty())
5874 snprintf(buf
, len
, _("incompatible type for method %s%s%s"),
5875 open_quote
, n
.c_str(), close_quote
);
5878 _("incompatible type for method %s%s%s (%s)"),
5879 open_quote
, n
.c_str(), close_quote
,
5881 reason
->assign(buf
);
5887 if (!is_pointer
&& !m
->is_value_method())
5891 std::string n
= Gogo::message_name(p
->name());
5892 size_t len
= 100 + n
.length();
5893 char* buf
= new char[len
];
5894 snprintf(buf
, len
, _("method %s%s%s requires a pointer"),
5895 open_quote
, n
.c_str(), close_quote
);
5896 reason
->assign(buf
);
5906 // Return a tree for an interface type. An interface is a pointer to
5907 // a struct. The struct has three fields. The first field is a
5908 // pointer to the type descriptor for the dynamic type of the object.
5909 // The second field is a pointer to a table of methods for the
5910 // interface to be used with the object. The third field is the value
5911 // of the object itself.
5914 Interface_type::do_get_tree(Gogo
* gogo
)
5916 if (this->methods_
== NULL
)
5918 // At the tree level, use the same type for all empty
5919 // interfaces. This lets us assign them to each other directly
5920 // without triggering GIMPLE type errors.
5921 tree dtype
= Type::make_type_descriptor_type()->get_tree(gogo
);
5922 dtype
= build_pointer_type(build_qualified_type(dtype
, TYPE_QUAL_CONST
));
5923 static tree empty_interface
;
5924 return Gogo::builtin_struct(&empty_interface
, "__go_empty_interface",
5926 "__type_descriptor",
5932 return this->fill_in_tree(gogo
, make_node(RECORD_TYPE
));
5935 // Fill in the tree for an interface type. This is used for named
5939 Interface_type::fill_in_tree(Gogo
* gogo
, tree type
)
5941 gcc_assert(this->methods_
!= NULL
);
5943 // Build the type of the table of methods.
5945 tree method_table
= make_node(RECORD_TYPE
);
5947 // The first field is a pointer to the type descriptor.
5948 tree name_tree
= get_identifier("__type_descriptor");
5949 tree dtype
= Type::make_type_descriptor_type()->get_tree(gogo
);
5950 dtype
= build_pointer_type(build_qualified_type(dtype
, TYPE_QUAL_CONST
));
5951 tree field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, dtype
);
5952 DECL_CONTEXT(field
) = method_table
;
5953 TYPE_FIELDS(method_table
) = field
;
5955 std::string last_name
= "";
5956 tree
* pp
= &DECL_CHAIN(field
);
5957 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
5958 p
!= this->methods_
->end();
5961 std::string name
= Gogo::unpack_hidden_name(p
->name());
5962 name_tree
= get_identifier_with_length(name
.data(), name
.length());
5963 tree field_type
= p
->type()->get_tree(gogo
);
5964 if (field_type
== error_mark_node
)
5965 return error_mark_node
;
5966 field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, field_type
);
5967 DECL_CONTEXT(field
) = method_table
;
5969 pp
= &DECL_CHAIN(field
);
5970 // Sanity check: the names should be sorted.
5971 gcc_assert(p
->name() > last_name
);
5972 last_name
= p
->name();
5974 layout_type(method_table
);
5976 tree mtype
= build_pointer_type(method_table
);
5978 tree field_trees
= NULL_TREE
;
5981 name_tree
= get_identifier("__methods");
5982 field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, mtype
);
5983 DECL_CONTEXT(field
) = type
;
5985 pp
= &DECL_CHAIN(field
);
5987 name_tree
= get_identifier("__object");
5988 field
= build_decl(this->location_
, FIELD_DECL
, name_tree
, ptr_type_node
);
5989 DECL_CONTEXT(field
) = type
;
5992 TYPE_FIELDS(type
) = field_trees
;
5999 // Initialization value.
6002 Interface_type::do_get_init_tree(Gogo
*, tree type_tree
, bool is_clear
)
6007 VEC(constructor_elt
,gc
)* init
= VEC_alloc(constructor_elt
, gc
, 2);
6008 for (tree field
= TYPE_FIELDS(type_tree
);
6010 field
= DECL_CHAIN(field
))
6012 constructor_elt
* elt
= VEC_quick_push(constructor_elt
, init
, NULL
);
6014 elt
->value
= fold_convert(TREE_TYPE(field
), null_pointer_node
);
6017 tree ret
= build_constructor(type_tree
, init
);
6018 TREE_CONSTANT(ret
) = 1;
6022 // The type of an interface type descriptor.
6025 Interface_type::make_interface_type_descriptor_type()
6030 Type
* tdt
= Type::make_type_descriptor_type();
6031 Type
* ptdt
= Type::make_type_descriptor_ptr_type();
6033 Type
* string_type
= Type::lookup_string_type();
6034 Type
* pointer_string_type
= Type::make_pointer_type(string_type
);
6037 Type::make_builtin_struct_type(3,
6038 "name", pointer_string_type
,
6039 "pkgPath", pointer_string_type
,
6042 Type
* nsm
= Type::make_builtin_named_type("imethod", sm
);
6044 Type
* slice_nsm
= Type::make_array_type(nsm
, NULL
);
6046 Struct_type
* s
= Type::make_builtin_struct_type(2,
6048 "methods", slice_nsm
);
6050 ret
= Type::make_builtin_named_type("InterfaceType", s
);
6056 // Build a type descriptor for an interface type.
6059 Interface_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
6061 source_location bloc
= BUILTINS_LOCATION
;
6063 Type
* itdt
= Interface_type::make_interface_type_descriptor_type();
6065 const Struct_field_list
* ifields
= itdt
->struct_type()->fields();
6067 Expression_list
* ivals
= new Expression_list();
6070 Struct_field_list::const_iterator pif
= ifields
->begin();
6071 gcc_assert(pif
->field_name() == "commonType");
6072 ivals
->push_back(this->type_descriptor_constructor(gogo
,
6073 RUNTIME_TYPE_KIND_INTERFACE
,
6077 gcc_assert(pif
->field_name() == "methods");
6079 Expression_list
* methods
= new Expression_list();
6080 if (this->methods_
!= NULL
&& !this->methods_
->empty())
6082 Type
* elemtype
= pif
->type()->array_type()->element_type();
6084 methods
->reserve(this->methods_
->size());
6085 for (Typed_identifier_list::const_iterator pm
= this->methods_
->begin();
6086 pm
!= this->methods_
->end();
6089 const Struct_field_list
* mfields
= elemtype
->struct_type()->fields();
6091 Expression_list
* mvals
= new Expression_list();
6094 Struct_field_list::const_iterator pmf
= mfields
->begin();
6095 gcc_assert(pmf
->field_name() == "name");
6096 std::string s
= Gogo::unpack_hidden_name(pm
->name());
6097 Expression
* e
= Expression::make_string(s
, bloc
);
6098 mvals
->push_back(Expression::make_unary(OPERATOR_AND
, e
, bloc
));
6101 gcc_assert(pmf
->field_name() == "pkgPath");
6102 if (!Gogo::is_hidden_name(pm
->name()))
6103 mvals
->push_back(Expression::make_nil(bloc
));
6106 s
= Gogo::hidden_name_prefix(pm
->name());
6107 e
= Expression::make_string(s
, bloc
);
6108 mvals
->push_back(Expression::make_unary(OPERATOR_AND
, e
, bloc
));
6112 gcc_assert(pmf
->field_name() == "typ");
6113 mvals
->push_back(Expression::make_type_descriptor(pm
->type(), bloc
));
6116 gcc_assert(pmf
== mfields
->end());
6118 e
= Expression::make_struct_composite_literal(elemtype
, mvals
,
6120 methods
->push_back(e
);
6124 ivals
->push_back(Expression::make_slice_composite_literal(pif
->type(),
6128 gcc_assert(pif
== ifields
->end());
6130 return Expression::make_struct_composite_literal(itdt
, ivals
, bloc
);
6133 // Reflection string.
6136 Interface_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
6138 ret
->append("interface {");
6139 if (this->methods_
!= NULL
)
6141 for (Typed_identifier_list::const_iterator p
= this->methods_
->begin();
6142 p
!= this->methods_
->end();
6145 if (p
!= this->methods_
->begin())
6147 ret
->push_back(' ');
6148 ret
->append(Gogo::unpack_hidden_name(p
->name()));
6149 std::string sub
= p
->type()->reflection(gogo
);
6150 gcc_assert(sub
.compare(0, 4, "func") == 0);
6151 sub
= sub
.substr(4);
6161 Interface_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
6163 ret
->push_back('I');
6165 const Typed_identifier_list
* methods
= this->methods_
;
6166 if (methods
!= NULL
)
6168 for (Typed_identifier_list::const_iterator p
= methods
->begin();
6169 p
!= methods
->end();
6172 std::string n
= Gogo::unpack_hidden_name(p
->name());
6174 snprintf(buf
, sizeof buf
, "%u_",
6175 static_cast<unsigned int>(n
.length()));
6178 this->append_mangled_name(p
->type(), gogo
, ret
);
6182 ret
->push_back('e');
6188 Interface_type::do_export(Export
* exp
) const
6190 exp
->write_c_string("interface { ");
6192 const Typed_identifier_list
* methods
= this->methods_
;
6193 if (methods
!= NULL
)
6195 for (Typed_identifier_list::const_iterator pm
= methods
->begin();
6196 pm
!= methods
->end();
6199 exp
->write_string(pm
->name());
6200 exp
->write_c_string(" (");
6202 const Function_type
* fntype
= pm
->type()->function_type();
6205 const Typed_identifier_list
* parameters
= fntype
->parameters();
6206 if (parameters
!= NULL
)
6208 bool is_varargs
= fntype
->is_varargs();
6209 for (Typed_identifier_list::const_iterator pp
=
6210 parameters
->begin();
6211 pp
!= parameters
->end();
6217 exp
->write_c_string(", ");
6218 if (!is_varargs
|| pp
+ 1 != parameters
->end())
6219 exp
->write_type(pp
->type());
6222 exp
->write_c_string("...");
6223 Type
*pptype
= pp
->type();
6224 exp
->write_type(pptype
->array_type()->element_type());
6229 exp
->write_c_string(")");
6231 const Typed_identifier_list
* results
= fntype
->results();
6232 if (results
!= NULL
)
6234 exp
->write_c_string(" ");
6235 if (results
->size() == 1)
6236 exp
->write_type(results
->begin()->type());
6240 exp
->write_c_string("(");
6241 for (Typed_identifier_list::const_iterator p
=
6243 p
!= results
->end();
6249 exp
->write_c_string(", ");
6250 exp
->write_type(p
->type());
6252 exp
->write_c_string(")");
6256 exp
->write_c_string("; ");
6260 exp
->write_c_string("}");
6263 // Import an interface type.
6266 Interface_type::do_import(Import
* imp
)
6268 imp
->require_c_string("interface { ");
6270 Typed_identifier_list
* methods
= new Typed_identifier_list
;
6271 while (imp
->peek_char() != '}')
6273 std::string name
= imp
->read_identifier();
6274 imp
->require_c_string(" (");
6276 Typed_identifier_list
* parameters
;
6277 bool is_varargs
= false;
6278 if (imp
->peek_char() == ')')
6282 parameters
= new Typed_identifier_list
;
6285 if (imp
->match_c_string("..."))
6291 Type
* ptype
= imp
->read_type();
6293 ptype
= Type::make_array_type(ptype
, NULL
);
6294 parameters
->push_back(Typed_identifier(Import::import_marker
,
6295 ptype
, imp
->location()));
6296 if (imp
->peek_char() != ',')
6298 gcc_assert(!is_varargs
);
6299 imp
->require_c_string(", ");
6302 imp
->require_c_string(")");
6304 Typed_identifier_list
* results
;
6305 if (imp
->peek_char() != ' ')
6309 results
= new Typed_identifier_list
;
6311 if (imp
->peek_char() != '(')
6313 Type
* rtype
= imp
->read_type();
6314 results
->push_back(Typed_identifier(Import::import_marker
,
6315 rtype
, imp
->location()));
6322 Type
* rtype
= imp
->read_type();
6323 results
->push_back(Typed_identifier(Import::import_marker
,
6324 rtype
, imp
->location()));
6325 if (imp
->peek_char() != ',')
6327 imp
->require_c_string(", ");
6329 imp
->require_c_string(")");
6333 Function_type
* fntype
= Type::make_function_type(NULL
, parameters
,
6337 fntype
->set_is_varargs();
6338 methods
->push_back(Typed_identifier(name
, fntype
, imp
->location()));
6340 imp
->require_c_string("; ");
6343 imp
->require_c_string("}");
6345 if (methods
->empty())
6351 return Type::make_interface_type(methods
, imp
->location());
6354 // Make an interface type.
6357 Type::make_interface_type(Typed_identifier_list
* methods
,
6358 source_location location
)
6360 return new Interface_type(methods
, location
);
6365 // Bind a method to an object.
6368 Method::bind_method(Expression
* expr
, source_location location
) const
6370 if (this->stub_
== NULL
)
6372 // When there is no stub object, the binding is determined by
6374 return this->do_bind_method(expr
, location
);
6377 Expression
* func
= Expression::make_func_reference(this->stub_
, NULL
,
6379 return Expression::make_bound_method(expr
, func
, location
);
6382 // Return the named object associated with a method. This may only be
6383 // called after methods are finalized.
6386 Method::named_object() const
6388 if (this->stub_
!= NULL
)
6390 return this->do_named_object();
6393 // Class Named_method.
6395 // The type of the method.
6398 Named_method::do_type() const
6400 if (this->named_object_
->is_function())
6401 return this->named_object_
->func_value()->type();
6402 else if (this->named_object_
->is_function_declaration())
6403 return this->named_object_
->func_declaration_value()->type();
6408 // Return the location of the method receiver.
6411 Named_method::do_receiver_location() const
6413 return this->do_type()->receiver()->location();
6416 // Bind a method to an object.
6419 Named_method::do_bind_method(Expression
* expr
, source_location location
) const
6421 Expression
* func
= Expression::make_func_reference(this->named_object_
, NULL
,
6423 Bound_method_expression
* bme
= Expression::make_bound_method(expr
, func
,
6425 // If this is not a local method, and it does not use a stub, then
6426 // the real method expects a different type. We need to cast the
6428 if (this->depth() > 0 && !this->needs_stub_method())
6430 Function_type
* ftype
= this->do_type();
6431 gcc_assert(ftype
->is_method());
6432 Type
* frtype
= ftype
->receiver()->type();
6433 bme
->set_first_argument_type(frtype
);
6438 // Class Interface_method.
6440 // Bind a method to an object.
6443 Interface_method::do_bind_method(Expression
* expr
,
6444 source_location location
) const
6446 return Expression::make_interface_field_reference(expr
, this->name_
,
6452 // Insert a new method. Return true if it was inserted, false
6456 Methods::insert(const std::string
& name
, Method
* m
)
6458 std::pair
<Method_map::iterator
, bool> ins
=
6459 this->methods_
.insert(std::make_pair(name
, m
));
6464 Method
* old_method
= ins
.first
->second
;
6465 if (m
->depth() < old_method
->depth())
6468 ins
.first
->second
= m
;
6473 if (m
->depth() == old_method
->depth())
6474 old_method
->set_is_ambiguous();
6480 // Return the number of unambiguous methods.
6483 Methods::count() const
6486 for (Method_map::const_iterator p
= this->methods_
.begin();
6487 p
!= this->methods_
.end();
6489 if (!p
->second
->is_ambiguous())
6494 // Class Named_type.
6496 // Return the name of the type.
6499 Named_type::name() const
6501 return this->named_object_
->name();
6504 // Return the name of the type to use in an error message.
6507 Named_type::message_name() const
6509 return this->named_object_
->message_name();
6512 // Return the base type for this type. We have to be careful about
6513 // circular type definitions, which are invalid but may be seen here.
6516 Named_type::named_base()
6518 if (this->seen_
> 0)
6521 Type
* ret
= this->type_
->base();
6527 Named_type::named_base() const
6529 if (this->seen_
> 0)
6532 const Type
* ret
= this->type_
->base();
6537 // Return whether this is an error type. We have to be careful about
6538 // circular type definitions, which are invalid but may be seen here.
6541 Named_type::is_named_error_type() const
6543 if (this->seen_
> 0)
6546 bool ret
= this->type_
->is_error_type();
6551 // Add a method to this type.
6554 Named_type::add_method(const std::string
& name
, Function
* function
)
6556 if (this->local_methods_
== NULL
)
6557 this->local_methods_
= new Bindings(NULL
);
6558 return this->local_methods_
->add_function(name
, NULL
, function
);
6561 // Add a method declaration to this type.
6564 Named_type::add_method_declaration(const std::string
& name
, Package
* package
,
6565 Function_type
* type
,
6566 source_location location
)
6568 if (this->local_methods_
== NULL
)
6569 this->local_methods_
= new Bindings(NULL
);
6570 return this->local_methods_
->add_function_declaration(name
, package
, type
,
6574 // Add an existing method to this type.
6577 Named_type::add_existing_method(Named_object
* no
)
6579 if (this->local_methods_
== NULL
)
6580 this->local_methods_
= new Bindings(NULL
);
6581 this->local_methods_
->add_named_object(no
);
6584 // Look for a local method NAME, and returns its named object, or NULL
6588 Named_type::find_local_method(const std::string
& name
) const
6590 if (this->local_methods_
== NULL
)
6592 return this->local_methods_
->lookup(name
);
6595 // Return whether NAME is an unexported field or method, for better
6599 Named_type::is_unexported_local_method(Gogo
* gogo
,
6600 const std::string
& name
) const
6602 Bindings
* methods
= this->local_methods_
;
6603 if (methods
!= NULL
)
6605 for (Bindings::const_declarations_iterator p
=
6606 methods
->begin_declarations();
6607 p
!= methods
->end_declarations();
6610 if (Gogo::is_hidden_name(p
->first
)
6611 && name
== Gogo::unpack_hidden_name(p
->first
)
6612 && gogo
->pack_hidden_name(name
, false) != p
->first
)
6619 // Build the complete list of methods for this type, which means
6620 // recursively including all methods for anonymous fields. Create all
6624 Named_type::finalize_methods(Gogo
* gogo
)
6626 if (this->all_methods_
!= NULL
)
6629 if (this->local_methods_
!= NULL
6630 && (this->points_to() != NULL
|| this->interface_type() != NULL
))
6632 const Bindings
* lm
= this->local_methods_
;
6633 for (Bindings::const_declarations_iterator p
= lm
->begin_declarations();
6634 p
!= lm
->end_declarations();
6636 error_at(p
->second
->location(),
6637 "invalid pointer or interface receiver type");
6638 delete this->local_methods_
;
6639 this->local_methods_
= NULL
;
6643 Type::finalize_methods(gogo
, this, this->location_
, &this->all_methods_
);
6646 // Return the method NAME, or NULL if there isn't one or if it is
6647 // ambiguous. Set *IS_AMBIGUOUS if the method exists but is
6651 Named_type::method_function(const std::string
& name
, bool* is_ambiguous
) const
6653 return Type::method_function(this->all_methods_
, name
, is_ambiguous
);
6656 // Return a pointer to the interface method table for this type for
6657 // the interface INTERFACE. IS_POINTER is true if this is for a
6661 Named_type::interface_method_table(Gogo
* gogo
, const Interface_type
* interface
,
6664 gcc_assert(!interface
->is_empty());
6666 Interface_method_tables
** pimt
= (is_pointer
6667 ? &this->interface_method_tables_
6668 : &this->pointer_interface_method_tables_
);
6671 *pimt
= new Interface_method_tables(5);
6673 std::pair
<const Interface_type
*, tree
> val(interface
, NULL_TREE
);
6674 std::pair
<Interface_method_tables::iterator
, bool> ins
= (*pimt
)->insert(val
);
6678 // This is a new entry in the hash table.
6679 gcc_assert(ins
.first
->second
== NULL_TREE
);
6680 ins
.first
->second
= gogo
->interface_method_table_for_type(interface
,
6685 tree decl
= ins
.first
->second
;
6686 if (decl
== error_mark_node
)
6687 return error_mark_node
;
6688 gcc_assert(decl
!= NULL_TREE
&& TREE_CODE(decl
) == VAR_DECL
);
6689 return build_fold_addr_expr(decl
);
6692 // Return whether a named type has any hidden fields.
6695 Named_type::named_type_has_hidden_fields(std::string
* reason
) const
6697 if (this->seen_
> 0)
6700 bool ret
= this->type_
->has_hidden_fields(this, reason
);
6705 // Look for a use of a complete type within another type. This is
6706 // used to check that we don't try to use a type within itself.
6708 class Find_type_use
: public Traverse
6711 Find_type_use(Type
* find_type
)
6712 : Traverse(traverse_types
),
6713 find_type_(find_type
), found_(false)
6716 // Whether we found the type.
6719 { return this->found_
; }
6726 // The type we are looking for.
6728 // Whether we found the type.
6732 // Check for FIND_TYPE in TYPE.
6735 Find_type_use::type(Type
* type
)
6737 if (this->find_type_
== type
)
6739 this->found_
= true;
6740 return TRAVERSE_EXIT
;
6742 // It's OK if we see a reference to the type in any type which is
6743 // essentially a pointer: a pointer, a slice, a function, a map, or
6745 if (type
->points_to() != NULL
6746 || type
->is_open_array_type()
6747 || type
->function_type() != NULL
6748 || type
->map_type() != NULL
6749 || type
->channel_type() != NULL
)
6750 return TRAVERSE_SKIP_COMPONENTS
;
6752 // For an interface, a reference to the type in a method type should
6753 // be ignored, but we have to consider direct inheritance. When
6754 // this is called, there may be cases of direct inheritance
6755 // represented as a method with no name.
6756 if (type
->interface_type() != NULL
)
6758 const Typed_identifier_list
* methods
= type
->interface_type()->methods();
6759 if (methods
!= NULL
)
6761 for (Typed_identifier_list::const_iterator p
= methods
->begin();
6762 p
!= methods
->end();
6765 if (p
->name().empty())
6767 if (Type::traverse(p
->type(), this) == TRAVERSE_EXIT
)
6768 return TRAVERSE_EXIT
;
6772 return TRAVERSE_SKIP_COMPONENTS
;
6775 return TRAVERSE_CONTINUE
;
6778 // Verify that a named type does not refer to itself.
6781 Named_type::do_verify()
6783 Find_type_use
find(this);
6784 Type::traverse(this->type_
, &find
);
6787 error_at(this->location_
, "invalid recursive type %qs",
6788 this->message_name().c_str());
6789 this->is_error_
= true;
6793 // Check whether any of the local methods overloads an existing
6794 // struct field or interface method. We don't need to check the
6795 // list of methods against itself: that is handled by the Bindings
6797 if (this->local_methods_
!= NULL
)
6799 Struct_type
* st
= this->type_
->struct_type();
6800 Interface_type
* it
= this->type_
->interface_type();
6801 bool found_dup
= false;
6802 if (st
!= NULL
|| it
!= NULL
)
6804 for (Bindings::const_declarations_iterator p
=
6805 this->local_methods_
->begin_declarations();
6806 p
!= this->local_methods_
->end_declarations();
6809 const std::string
& name(p
->first
);
6810 if (st
!= NULL
&& st
->find_local_field(name
, NULL
) != NULL
)
6812 error_at(p
->second
->location(),
6813 "method %qs redeclares struct field name",
6814 Gogo::message_name(name
).c_str());
6817 if (it
!= NULL
&& it
->find_method(name
) != NULL
)
6819 error_at(p
->second
->location(),
6820 "method %qs redeclares interface method name",
6821 Gogo::message_name(name
).c_str());
6833 // Return a hash code. This is used for method lookup. We simply
6834 // hash on the name itself.
6837 Named_type::do_hash_for_method(Gogo
* gogo
) const
6839 const std::string
& name(this->named_object()->name());
6840 unsigned int ret
= Type::hash_string(name
, 0);
6842 // GOGO will be NULL here when called from Type_hash_identical.
6843 // That is OK because that is only used for internal hash tables
6844 // where we are going to be comparing named types for equality. In
6845 // other cases, which are cases where the runtime is going to
6846 // compare hash codes to see if the types are the same, we need to
6847 // include the package prefix and name in the hash.
6848 if (gogo
!= NULL
&& !Gogo::is_hidden_name(name
) && !this->is_builtin())
6850 const Package
* package
= this->named_object()->package();
6851 if (package
== NULL
)
6853 ret
= Type::hash_string(gogo
->unique_prefix(), ret
);
6854 ret
= Type::hash_string(gogo
->package_name(), ret
);
6858 ret
= Type::hash_string(package
->unique_prefix(), ret
);
6859 ret
= Type::hash_string(package
->name(), ret
);
6866 // Get a tree for a named type.
6869 Named_type::do_get_tree(Gogo
* gogo
)
6871 if (this->is_error_
)
6872 return error_mark_node
;
6874 // Go permits types to refer to themselves in various ways. Break
6875 // the recursion here.
6877 switch (this->type_
->forwarded()->classification())
6880 return error_mark_node
;
6889 // These types can not refer to themselves.
6892 // All maps and channels have the same type in GENERIC.
6893 t
= Type::get_named_type_tree(gogo
, this->type_
);
6894 if (t
== error_mark_node
)
6895 return error_mark_node
;
6896 // Build a copy to set TYPE_NAME.
6897 t
= build_variant_type_copy(t
);
6901 // GENERIC can't handle a pointer to a function type whose
6902 // return type is a pointer to the function type itself. It
6903 // goes into an infinite loop when walking the types.
6904 if (this->seen_
> 0)
6906 Function_type
* fntype
= this->type_
->function_type();
6907 if (fntype
->results() != NULL
6908 && fntype
->results()->size() == 1
6909 && fntype
->results()->front().type()->forwarded() == this)
6910 return ptr_type_node
;
6912 // We can legitimately see ourselves here twice when a named
6913 // type is defined using a struct which refers to the named
6914 // type. If we see ourselves too often we are in a loop.
6915 if (this->seen_
> 3)
6916 return ptr_type_node
;
6919 t
= Type::get_named_type_tree(gogo
, this->type_
);
6921 if (t
== error_mark_node
)
6922 return error_mark_node
;
6923 t
= build_variant_type_copy(t
);
6927 // Don't recur infinitely if a pointer type refers to itself.
6928 // Ideally we would build a circular data structure here, but
6929 // GENERIC can't handle them.
6930 if (this->seen_
> 0)
6932 if (this->type_
->points_to()->forwarded() == this)
6933 return ptr_type_node
;
6935 if (this->seen_
> 3)
6936 return ptr_type_node
;
6939 t
= Type::get_named_type_tree(gogo
, this->type_
);
6941 if (t
== error_mark_node
)
6942 return error_mark_node
;
6943 t
= build_variant_type_copy(t
);
6947 if (this->named_tree_
!= NULL_TREE
)
6948 return this->named_tree_
;
6949 t
= make_node(RECORD_TYPE
);
6950 this->named_tree_
= t
;
6951 t
= this->type_
->struct_type()->fill_in_tree(gogo
, t
);
6952 if (t
== error_mark_node
)
6953 return error_mark_node
;
6957 if (!this->is_open_array_type())
6958 t
= Type::get_named_type_tree(gogo
, this->type_
);
6961 if (this->named_tree_
!= NULL_TREE
)
6962 return this->named_tree_
;
6963 t
= gogo
->slice_type_tree(void_type_node
);
6964 this->named_tree_
= t
;
6965 t
= this->type_
->array_type()->fill_in_tree(gogo
, t
);
6967 if (t
== error_mark_node
)
6968 return error_mark_node
;
6969 t
= build_variant_type_copy(t
);
6972 case TYPE_INTERFACE
:
6973 if (this->type_
->interface_type()->is_empty())
6975 t
= Type::get_named_type_tree(gogo
, this->type_
);
6976 if (t
== error_mark_node
)
6977 return error_mark_node
;
6978 t
= build_variant_type_copy(t
);
6982 if (this->named_tree_
!= NULL_TREE
)
6983 return this->named_tree_
;
6984 t
= make_node(RECORD_TYPE
);
6985 this->named_tree_
= t
;
6986 t
= this->type_
->interface_type()->fill_in_tree(gogo
, t
);
6987 if (t
== error_mark_node
)
6988 return error_mark_node
;
6994 // When a named type T1 is defined as another named type T2,
6995 // the definition must simply be "type T1 T2". If the
6996 // definition of T2 may refer to T1, then we must simply
6997 // return the type for T2 here. It's not precisely correct,
6998 // but it's as close as we can get with GENERIC.
7000 t
= Type::get_named_type_tree(gogo
, this->type_
);
7002 if (this->seen_
> 0)
7004 if (t
== error_mark_node
)
7005 return error_mark_node
;
7006 t
= build_variant_type_copy(t
);
7011 // An undefined forwarding type. Make sure the error is
7013 this->type_
->forward_declaration_type()->real_type();
7014 return error_mark_node
;
7018 case TYPE_CALL_MULTIPLE_RESULT
:
7022 tree id
= this->named_object_
->get_id(gogo
);
7023 tree decl
= build_decl(this->location_
, TYPE_DECL
, id
, t
);
7024 TYPE_NAME(t
) = decl
;
7029 // Build a type descriptor for a named type.
7032 Named_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
7034 // If NAME is not NULL, then we don't really want the type
7035 // descriptor for this type; we want the descriptor for the
7036 // underlying type, giving it the name NAME.
7037 return this->named_type_descriptor(gogo
, this->type_
,
7038 name
== NULL
? this : name
);
7041 // Add to the reflection string. This is used mostly for the name of
7042 // the type used in a type descriptor, not for actual reflection
7046 Named_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
7048 if (this->location() != BUILTINS_LOCATION
)
7050 const Package
* package
= this->named_object_
->package();
7051 if (package
!= NULL
)
7052 ret
->append(package
->name());
7054 ret
->append(gogo
->package_name());
7055 ret
->push_back('.');
7057 if (this->in_function_
!= NULL
)
7059 ret
->append(Gogo::unpack_hidden_name(this->in_function_
->name()));
7060 ret
->push_back('$');
7062 ret
->append(Gogo::unpack_hidden_name(this->named_object_
->name()));
7065 // Get the mangled name.
7068 Named_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
7070 Named_object
* no
= this->named_object_
;
7072 if (this->location() == BUILTINS_LOCATION
)
7073 gcc_assert(this->in_function_
== NULL
);
7076 const std::string
& unique_prefix(no
->package() == NULL
7077 ? gogo
->unique_prefix()
7078 : no
->package()->unique_prefix());
7079 const std::string
& package_name(no
->package() == NULL
7080 ? gogo
->package_name()
7081 : no
->package()->name());
7082 name
= unique_prefix
;
7083 name
.append(1, '.');
7084 name
.append(package_name
);
7085 name
.append(1, '.');
7086 if (this->in_function_
!= NULL
)
7088 name
.append(Gogo::unpack_hidden_name(this->in_function_
->name()));
7089 name
.append(1, '$');
7092 name
.append(Gogo::unpack_hidden_name(no
->name()));
7094 snprintf(buf
, sizeof buf
, "N%u_", static_cast<unsigned int>(name
.length()));
7099 // Export the type. This is called to export a global type.
7102 Named_type::export_named_type(Export
* exp
, const std::string
&) const
7104 // We don't need to write the name of the type here, because it will
7105 // be written by Export::write_type anyhow.
7106 exp
->write_c_string("type ");
7107 exp
->write_type(this);
7108 exp
->write_c_string(";\n");
7111 // Import a named type.
7114 Named_type::import_named_type(Import
* imp
, Named_type
** ptype
)
7116 imp
->require_c_string("type ");
7117 Type
*type
= imp
->read_type();
7118 *ptype
= type
->named_type();
7119 gcc_assert(*ptype
!= NULL
);
7120 imp
->require_c_string(";\n");
7123 // Export the type when it is referenced by another type. In this
7124 // case Export::export_type will already have issued the name.
7127 Named_type::do_export(Export
* exp
) const
7129 exp
->write_type(this->type_
);
7131 // To save space, we only export the methods directly attached to
7133 Bindings
* methods
= this->local_methods_
;
7134 if (methods
== NULL
)
7137 exp
->write_c_string("\n");
7138 for (Bindings::const_definitions_iterator p
= methods
->begin_definitions();
7139 p
!= methods
->end_definitions();
7142 exp
->write_c_string(" ");
7143 (*p
)->export_named_object(exp
);
7146 for (Bindings::const_declarations_iterator p
= methods
->begin_declarations();
7147 p
!= methods
->end_declarations();
7150 if (p
->second
->is_function_declaration())
7152 exp
->write_c_string(" ");
7153 p
->second
->export_named_object(exp
);
7158 // Make a named type.
7161 Type::make_named_type(Named_object
* named_object
, Type
* type
,
7162 source_location location
)
7164 return new Named_type(named_object
, type
, location
);
7167 // Finalize the methods for TYPE. It will be a named type or a struct
7168 // type. This sets *ALL_METHODS to the list of methods, and builds
7169 // all required stubs.
7172 Type::finalize_methods(Gogo
* gogo
, const Type
* type
, source_location location
,
7173 Methods
** all_methods
)
7175 *all_methods
= NULL
;
7176 Types_seen types_seen
;
7177 Type::add_methods_for_type(type
, NULL
, 0, false, false, &types_seen
,
7179 Type::build_stub_methods(gogo
, type
, *all_methods
, location
);
7182 // Add the methods for TYPE to *METHODS. FIELD_INDEXES is used to
7183 // build up the struct field indexes as we go. DEPTH is the depth of
7184 // the field within TYPE. IS_EMBEDDED_POINTER is true if we are
7185 // adding these methods for an anonymous field with pointer type.
7186 // NEEDS_STUB_METHOD is true if we need to use a stub method which
7187 // calls the real method. TYPES_SEEN is used to avoid infinite
7191 Type::add_methods_for_type(const Type
* type
,
7192 const Method::Field_indexes
* field_indexes
,
7194 bool is_embedded_pointer
,
7195 bool needs_stub_method
,
7196 Types_seen
* types_seen
,
7199 // Pointer types may not have methods.
7200 if (type
->points_to() != NULL
)
7203 const Named_type
* nt
= type
->named_type();
7206 std::pair
<Types_seen::iterator
, bool> ins
= types_seen
->insert(nt
);
7212 Type::add_local_methods_for_type(nt
, field_indexes
, depth
,
7213 is_embedded_pointer
, needs_stub_method
,
7216 Type::add_embedded_methods_for_type(type
, field_indexes
, depth
,
7217 is_embedded_pointer
, needs_stub_method
,
7218 types_seen
, methods
);
7220 // If we are called with depth > 0, then we are looking at an
7221 // anonymous field of a struct. If such a field has interface type,
7222 // then we need to add the interface methods. We don't want to add
7223 // them when depth == 0, because we will already handle them
7224 // following the usual rules for an interface type.
7226 Type::add_interface_methods_for_type(type
, field_indexes
, depth
, methods
);
7229 // Add the local methods for the named type NT to *METHODS. The
7230 // parameters are as for add_methods_to_type.
7233 Type::add_local_methods_for_type(const Named_type
* nt
,
7234 const Method::Field_indexes
* field_indexes
,
7236 bool is_embedded_pointer
,
7237 bool needs_stub_method
,
7240 const Bindings
* local_methods
= nt
->local_methods();
7241 if (local_methods
== NULL
)
7244 if (*methods
== NULL
)
7245 *methods
= new Methods();
7247 for (Bindings::const_declarations_iterator p
=
7248 local_methods
->begin_declarations();
7249 p
!= local_methods
->end_declarations();
7252 Named_object
* no
= p
->second
;
7253 bool is_value_method
= (is_embedded_pointer
7254 || !Type::method_expects_pointer(no
));
7255 Method
* m
= new Named_method(no
, field_indexes
, depth
, is_value_method
,
7257 || (depth
> 0 && is_value_method
)));
7258 if (!(*methods
)->insert(no
->name(), m
))
7263 // Add the embedded methods for TYPE to *METHODS. These are the
7264 // methods attached to anonymous fields. The parameters are as for
7265 // add_methods_to_type.
7268 Type::add_embedded_methods_for_type(const Type
* type
,
7269 const Method::Field_indexes
* field_indexes
,
7271 bool is_embedded_pointer
,
7272 bool needs_stub_method
,
7273 Types_seen
* types_seen
,
7276 // Look for anonymous fields in TYPE. TYPE has fields if it is a
7278 const Struct_type
* st
= type
->struct_type();
7282 const Struct_field_list
* fields
= st
->fields();
7287 for (Struct_field_list::const_iterator pf
= fields
->begin();
7288 pf
!= fields
->end();
7291 if (!pf
->is_anonymous())
7294 Type
* ftype
= pf
->type();
7295 bool is_pointer
= false;
7296 if (ftype
->points_to() != NULL
)
7298 ftype
= ftype
->points_to();
7301 Named_type
* fnt
= ftype
->named_type();
7304 // This is an error, but it will be diagnosed elsewhere.
7308 Method::Field_indexes
* sub_field_indexes
= new Method::Field_indexes();
7309 sub_field_indexes
->next
= field_indexes
;
7310 sub_field_indexes
->field_index
= i
;
7312 Type::add_methods_for_type(fnt
, sub_field_indexes
, depth
+ 1,
7313 (is_embedded_pointer
|| is_pointer
),
7322 // If TYPE is an interface type, then add its method to *METHODS.
7323 // This is for interface methods attached to an anonymous field. The
7324 // parameters are as for add_methods_for_type.
7327 Type::add_interface_methods_for_type(const Type
* type
,
7328 const Method::Field_indexes
* field_indexes
,
7332 const Interface_type
* it
= type
->interface_type();
7336 const Typed_identifier_list
* imethods
= it
->methods();
7337 if (imethods
== NULL
)
7340 if (*methods
== NULL
)
7341 *methods
= new Methods();
7343 for (Typed_identifier_list::const_iterator pm
= imethods
->begin();
7344 pm
!= imethods
->end();
7347 Function_type
* fntype
= pm
->type()->function_type();
7348 gcc_assert(fntype
!= NULL
&& !fntype
->is_method());
7349 fntype
= fntype
->copy_with_receiver(const_cast<Type
*>(type
));
7350 Method
* m
= new Interface_method(pm
->name(), pm
->location(), fntype
,
7351 field_indexes
, depth
);
7352 if (!(*methods
)->insert(pm
->name(), m
))
7357 // Build stub methods for TYPE as needed. METHODS is the set of
7358 // methods for the type. A stub method may be needed when a type
7359 // inherits a method from an anonymous field. When we need the
7360 // address of the method, as in a type descriptor, we need to build a
7361 // little stub which does the required field dereferences and jumps to
7362 // the real method. LOCATION is the location of the type definition.
7365 Type::build_stub_methods(Gogo
* gogo
, const Type
* type
, const Methods
* methods
,
7366 source_location location
)
7368 if (methods
== NULL
)
7370 for (Methods::const_iterator p
= methods
->begin();
7371 p
!= methods
->end();
7374 Method
* m
= p
->second
;
7375 if (m
->is_ambiguous() || !m
->needs_stub_method())
7378 const std::string
& name(p
->first
);
7380 // Build a stub method.
7382 const Function_type
* fntype
= m
->type();
7384 static unsigned int counter
;
7386 snprintf(buf
, sizeof buf
, "$this%u", counter
);
7389 Type
* receiver_type
= const_cast<Type
*>(type
);
7390 if (!m
->is_value_method())
7391 receiver_type
= Type::make_pointer_type(receiver_type
);
7392 source_location receiver_location
= m
->receiver_location();
7393 Typed_identifier
* receiver
= new Typed_identifier(buf
, receiver_type
,
7396 const Typed_identifier_list
* fnparams
= fntype
->parameters();
7397 Typed_identifier_list
* stub_params
;
7398 if (fnparams
== NULL
|| fnparams
->empty())
7402 // We give each stub parameter a unique name.
7403 stub_params
= new Typed_identifier_list();
7404 for (Typed_identifier_list::const_iterator pp
= fnparams
->begin();
7405 pp
!= fnparams
->end();
7409 snprintf(pbuf
, sizeof pbuf
, "$p%u", counter
);
7410 stub_params
->push_back(Typed_identifier(pbuf
, pp
->type(),
7416 const Typed_identifier_list
* fnresults
= fntype
->results();
7417 Typed_identifier_list
* stub_results
;
7418 if (fnresults
== NULL
|| fnresults
->empty())
7419 stub_results
= NULL
;
7422 // We create the result parameters without any names, since
7423 // we won't refer to them.
7424 stub_results
= new Typed_identifier_list();
7425 for (Typed_identifier_list::const_iterator pr
= fnresults
->begin();
7426 pr
!= fnresults
->end();
7428 stub_results
->push_back(Typed_identifier("", pr
->type(),
7432 Function_type
* stub_type
= Type::make_function_type(receiver
,
7435 fntype
->location());
7436 if (fntype
->is_varargs())
7437 stub_type
->set_is_varargs();
7439 // We only create the function in the package which creates the
7441 const Package
* package
;
7442 if (type
->named_type() == NULL
)
7445 package
= type
->named_type()->named_object()->package();
7447 if (package
!= NULL
)
7448 stub
= Named_object::make_function_declaration(name
, package
,
7449 stub_type
, location
);
7452 stub
= gogo
->start_function(name
, stub_type
, false,
7453 fntype
->location());
7454 Type::build_one_stub_method(gogo
, m
, buf
, stub_params
,
7455 fntype
->is_varargs(), location
);
7456 gogo
->finish_function(fntype
->location());
7459 m
->set_stub_object(stub
);
7463 // Build a stub method which adjusts the receiver as required to call
7464 // METHOD. RECEIVER_NAME is the name we used for the receiver.
7465 // PARAMS is the list of function parameters.
7468 Type::build_one_stub_method(Gogo
* gogo
, Method
* method
,
7469 const char* receiver_name
,
7470 const Typed_identifier_list
* params
,
7472 source_location location
)
7474 Named_object
* receiver_object
= gogo
->lookup(receiver_name
, NULL
);
7475 gcc_assert(receiver_object
!= NULL
);
7477 Expression
* expr
= Expression::make_var_reference(receiver_object
, location
);
7478 expr
= Type::apply_field_indexes(expr
, method
->field_indexes(), location
);
7479 if (expr
->type()->points_to() == NULL
)
7480 expr
= Expression::make_unary(OPERATOR_AND
, expr
, location
);
7482 Expression_list
* arguments
;
7483 if (params
== NULL
|| params
->empty())
7487 arguments
= new Expression_list();
7488 for (Typed_identifier_list::const_iterator p
= params
->begin();
7492 Named_object
* param
= gogo
->lookup(p
->name(), NULL
);
7493 gcc_assert(param
!= NULL
);
7494 Expression
* param_ref
= Expression::make_var_reference(param
,
7496 arguments
->push_back(param_ref
);
7500 Expression
* func
= method
->bind_method(expr
, location
);
7501 gcc_assert(func
!= NULL
);
7502 Call_expression
* call
= Expression::make_call(func
, arguments
, is_varargs
,
7504 size_t count
= call
->result_count();
7506 gogo
->add_statement(Statement::make_statement(call
));
7509 Expression_list
* retvals
= new Expression_list();
7511 retvals
->push_back(call
);
7514 for (size_t i
= 0; i
< count
; ++i
)
7515 retvals
->push_back(Expression::make_call_result(call
, i
));
7517 const Function
* function
= gogo
->current_function()->func_value();
7518 const Typed_identifier_list
* results
= function
->type()->results();
7519 Statement
* retstat
= Statement::make_return_statement(results
, retvals
,
7521 gogo
->add_statement(retstat
);
7525 // Apply FIELD_INDEXES to EXPR. The field indexes have to be applied
7526 // in reverse order.
7529 Type::apply_field_indexes(Expression
* expr
,
7530 const Method::Field_indexes
* field_indexes
,
7531 source_location location
)
7533 if (field_indexes
== NULL
)
7535 expr
= Type::apply_field_indexes(expr
, field_indexes
->next
, location
);
7536 Struct_type
* stype
= expr
->type()->deref()->struct_type();
7537 gcc_assert(stype
!= NULL
7538 && field_indexes
->field_index
< stype
->field_count());
7539 if (expr
->type()->struct_type() == NULL
)
7541 gcc_assert(expr
->type()->points_to() != NULL
);
7542 expr
= Expression::make_unary(OPERATOR_MULT
, expr
, location
);
7543 gcc_assert(expr
->type()->struct_type() == stype
);
7545 return Expression::make_field_reference(expr
, field_indexes
->field_index
,
7549 // Return whether NO is a method for which the receiver is a pointer.
7552 Type::method_expects_pointer(const Named_object
* no
)
7554 const Function_type
*fntype
;
7555 if (no
->is_function())
7556 fntype
= no
->func_value()->type();
7557 else if (no
->is_function_declaration())
7558 fntype
= no
->func_declaration_value()->type();
7561 return fntype
->receiver()->type()->points_to() != NULL
;
7564 // Given a set of methods for a type, METHODS, return the method NAME,
7565 // or NULL if there isn't one or if it is ambiguous. If IS_AMBIGUOUS
7566 // is not NULL, then set *IS_AMBIGUOUS to true if the method exists
7567 // but is ambiguous (and return NULL).
7570 Type::method_function(const Methods
* methods
, const std::string
& name
,
7573 if (is_ambiguous
!= NULL
)
7574 *is_ambiguous
= false;
7575 if (methods
== NULL
)
7577 Methods::const_iterator p
= methods
->find(name
);
7578 if (p
== methods
->end())
7580 Method
* m
= p
->second
;
7581 if (m
->is_ambiguous())
7583 if (is_ambiguous
!= NULL
)
7584 *is_ambiguous
= true;
7590 // Look for field or method NAME for TYPE. Return an Expression for
7591 // the field or method bound to EXPR. If there is no such field or
7592 // method, give an appropriate error and return an error expression.
7595 Type::bind_field_or_method(Gogo
* gogo
, const Type
* type
, Expression
* expr
,
7596 const std::string
& name
,
7597 source_location location
)
7599 if (type
->deref()->is_error_type())
7600 return Expression::make_error(location
);
7602 const Named_type
* nt
= type
->named_type();
7604 nt
= type
->deref()->named_type();
7605 const Struct_type
* st
= type
->deref()->struct_type();
7606 const Interface_type
* it
= type
->deref()->interface_type();
7608 // If this is a pointer to a pointer, then it is possible that the
7609 // pointed-to type has methods.
7613 && type
->points_to() != NULL
7614 && type
->points_to()->points_to() != NULL
)
7616 expr
= Expression::make_unary(OPERATOR_MULT
, expr
, location
);
7617 type
= type
->points_to();
7618 nt
= type
->points_to()->named_type();
7619 st
= type
->points_to()->struct_type();
7620 it
= type
->points_to()->interface_type();
7623 bool receiver_can_be_pointer
= (expr
->type()->points_to() != NULL
7624 || expr
->is_addressable());
7625 bool is_method
= false;
7626 bool found_pointer_method
= false;
7629 if (Type::find_field_or_method(type
, name
, receiver_can_be_pointer
, NULL
,
7630 &is_method
, &found_pointer_method
,
7636 gcc_assert(st
!= NULL
);
7637 if (type
->struct_type() == NULL
)
7639 gcc_assert(type
->points_to() != NULL
);
7640 expr
= Expression::make_unary(OPERATOR_MULT
, expr
,
7642 gcc_assert(expr
->type()->struct_type() == st
);
7644 ret
= st
->field_reference(expr
, name
, location
);
7646 else if (it
!= NULL
&& it
->find_method(name
) != NULL
)
7647 ret
= Expression::make_interface_field_reference(expr
, name
,
7653 m
= nt
->method_function(name
, NULL
);
7654 else if (st
!= NULL
)
7655 m
= st
->method_function(name
, NULL
);
7658 gcc_assert(m
!= NULL
);
7659 if (!m
->is_value_method() && expr
->type()->points_to() == NULL
)
7660 expr
= Expression::make_unary(OPERATOR_AND
, expr
, location
);
7661 ret
= m
->bind_method(expr
, location
);
7663 gcc_assert(ret
!= NULL
);
7668 if (!ambig1
.empty())
7669 error_at(location
, "%qs is ambiguous via %qs and %qs",
7670 Gogo::message_name(name
).c_str(),
7671 Gogo::message_name(ambig1
).c_str(),
7672 Gogo::message_name(ambig2
).c_str());
7673 else if (found_pointer_method
)
7674 error_at(location
, "method requires a pointer");
7675 else if (nt
== NULL
&& st
== NULL
&& it
== NULL
)
7677 ("reference to field %qs in object which "
7678 "has no fields or methods"),
7679 Gogo::message_name(name
).c_str());
7683 if (!Gogo::is_hidden_name(name
))
7684 is_unexported
= false;
7687 std::string unpacked
= Gogo::unpack_hidden_name(name
);
7688 is_unexported
= Type::is_unexported_field_or_method(gogo
, type
,
7692 error_at(location
, "reference to unexported field or method %qs",
7693 Gogo::message_name(name
).c_str());
7695 error_at(location
, "reference to undefined field or method %qs",
7696 Gogo::message_name(name
).c_str());
7698 return Expression::make_error(location
);
7702 // Look in TYPE for a field or method named NAME, return true if one
7703 // is found. This looks through embedded anonymous fields and handles
7704 // ambiguity. If a method is found, sets *IS_METHOD to true;
7705 // otherwise, if a field is found, set it to false. If
7706 // RECEIVER_CAN_BE_POINTER is false, then the receiver is a value
7707 // whose address can not be taken. When returning false, this sets
7708 // *FOUND_POINTER_METHOD if we found a method we couldn't use because
7709 // it requires a pointer. LEVEL is used for recursive calls, and can
7710 // be NULL for a non-recursive call. When this function returns false
7711 // because it finds that the name is ambiguous, it will store a path
7712 // to the ambiguous names in *AMBIG1 and *AMBIG2. If the name is not
7713 // found at all, *AMBIG1 and *AMBIG2 will be unchanged.
7715 // This function just returns whether or not there is a field or
7716 // method, and whether it is a field or method. It doesn't build an
7717 // expression to refer to it. If it is a method, we then look in the
7718 // list of all methods for the type. If it is a field, the search has
7719 // to be done again, looking only for fields, and building up the
7720 // expression as we go.
7723 Type::find_field_or_method(const Type
* type
,
7724 const std::string
& name
,
7725 bool receiver_can_be_pointer
,
7728 bool* found_pointer_method
,
7729 std::string
* ambig1
,
7730 std::string
* ambig2
)
7732 // Named types can have locally defined methods.
7733 const Named_type
* nt
= type
->named_type();
7734 if (nt
== NULL
&& type
->points_to() != NULL
)
7735 nt
= type
->points_to()->named_type();
7738 Named_object
* no
= nt
->find_local_method(name
);
7741 if (receiver_can_be_pointer
|| !Type::method_expects_pointer(no
))
7747 // Record that we have found a pointer method in order to
7748 // give a better error message if we don't find anything
7750 *found_pointer_method
= true;
7754 // Interface types can have methods.
7755 const Interface_type
* it
= type
->deref()->interface_type();
7756 if (it
!= NULL
&& it
->find_method(name
) != NULL
)
7762 // Struct types can have fields. They can also inherit fields and
7763 // methods from anonymous fields.
7764 const Struct_type
* st
= type
->deref()->struct_type();
7767 const Struct_field_list
* fields
= st
->fields();
7771 int found_level
= 0;
7772 bool found_is_method
= false;
7773 std::string found_ambig1
;
7774 std::string found_ambig2
;
7775 const Struct_field
* found_parent
= NULL
;
7776 for (Struct_field_list::const_iterator pf
= fields
->begin();
7777 pf
!= fields
->end();
7780 if (pf
->field_name() == name
)
7786 if (!pf
->is_anonymous())
7789 if (pf
->type()->deref()->is_error_type()
7790 || pf
->type()->deref()->is_undefined())
7793 Named_type
* fnt
= pf
->type()->deref()->named_type();
7794 gcc_assert(fnt
!= NULL
);
7796 int sublevel
= level
== NULL
? 1 : *level
+ 1;
7798 std::string subambig1
;
7799 std::string subambig2
;
7800 bool subfound
= Type::find_field_or_method(fnt
,
7802 receiver_can_be_pointer
,
7805 found_pointer_method
,
7810 if (!subambig1
.empty())
7812 // The name was found via this field, but is ambiguous.
7813 // if the ambiguity is lower or at the same level as
7814 // anything else we have already found, then we want to
7815 // pass the ambiguity back to the caller.
7816 if (found_level
== 0 || sublevel
<= found_level
)
7818 found_ambig1
= pf
->field_name() + '.' + subambig1
;
7819 found_ambig2
= pf
->field_name() + '.' + subambig2
;
7820 found_level
= sublevel
;
7826 // The name was found via this field. Use the level to see
7827 // if we want to use this one, or whether it introduces an
7829 if (found_level
== 0 || sublevel
< found_level
)
7831 found_level
= sublevel
;
7832 found_is_method
= sub_is_method
;
7833 found_ambig1
.clear();
7834 found_ambig2
.clear();
7835 found_parent
= &*pf
;
7837 else if (sublevel
> found_level
)
7839 else if (found_ambig1
.empty())
7841 // We found an ambiguity.
7842 gcc_assert(found_parent
!= NULL
);
7843 found_ambig1
= found_parent
->field_name();
7844 found_ambig2
= pf
->field_name();
7848 // We found an ambiguity, but we already know of one.
7849 // Just report the earlier one.
7854 // Here if we didn't find anything FOUND_LEVEL is 0. If we found
7855 // something ambiguous, FOUND_LEVEL is not 0 and FOUND_AMBIG1 and
7856 // FOUND_AMBIG2 are not empty. If we found the field, FOUND_LEVEL
7857 // is not 0 and FOUND_AMBIG1 and FOUND_AMBIG2 are empty.
7859 if (found_level
== 0)
7861 else if (!found_ambig1
.empty())
7863 gcc_assert(!found_ambig1
.empty());
7864 ambig1
->assign(found_ambig1
);
7865 ambig2
->assign(found_ambig2
);
7867 *level
= found_level
;
7873 *level
= found_level
;
7874 *is_method
= found_is_method
;
7879 // Return whether NAME is an unexported field or method for TYPE.
7882 Type::is_unexported_field_or_method(Gogo
* gogo
, const Type
* type
,
7883 const std::string
& name
)
7885 type
= type
->deref();
7887 const Named_type
* nt
= type
->named_type();
7888 if (nt
!= NULL
&& nt
->is_unexported_local_method(gogo
, name
))
7891 const Interface_type
* it
= type
->interface_type();
7892 if (it
!= NULL
&& it
->is_unexported_method(gogo
, name
))
7895 const Struct_type
* st
= type
->struct_type();
7896 if (st
!= NULL
&& st
->is_unexported_local_field(gogo
, name
))
7902 const Struct_field_list
* fields
= st
->fields();
7906 for (Struct_field_list::const_iterator pf
= fields
->begin();
7907 pf
!= fields
->end();
7910 if (pf
->is_anonymous()
7911 && (!pf
->type()->deref()->is_error_type()
7912 && !pf
->type()->deref()->is_undefined()))
7914 Named_type
* subtype
= pf
->type()->deref()->named_type();
7915 gcc_assert(subtype
!= NULL
);
7916 if (Type::is_unexported_field_or_method(gogo
, subtype
, name
))
7924 // Class Forward_declaration.
7926 Forward_declaration_type::Forward_declaration_type(Named_object
* named_object
)
7927 : Type(TYPE_FORWARD
),
7928 named_object_(named_object
->resolve()), warned_(false)
7930 gcc_assert(this->named_object_
->is_unknown()
7931 || this->named_object_
->is_type_declaration());
7934 // Return the named object.
7937 Forward_declaration_type::named_object()
7939 return this->named_object_
->resolve();
7943 Forward_declaration_type::named_object() const
7945 return this->named_object_
->resolve();
7948 // Return the name of the forward declared type.
7951 Forward_declaration_type::name() const
7953 return this->named_object()->name();
7956 // Warn about a use of a type which has been declared but not defined.
7959 Forward_declaration_type::warn() const
7961 Named_object
* no
= this->named_object_
->resolve();
7962 if (no
->is_unknown())
7964 // The name was not defined anywhere.
7967 error_at(this->named_object_
->location(),
7968 "use of undefined type %qs",
7969 no
->message_name().c_str());
7970 this->warned_
= true;
7973 else if (no
->is_type_declaration())
7975 // The name was seen as a type, but the type was never defined.
7976 if (no
->type_declaration_value()->using_type())
7978 error_at(this->named_object_
->location(),
7979 "use of undefined type %qs",
7980 no
->message_name().c_str());
7981 this->warned_
= true;
7986 // The name was defined, but not as a type.
7989 error_at(this->named_object_
->location(), "expected type");
7990 this->warned_
= true;
7995 // Get the base type of a declaration. This gives an error if the
7996 // type has not yet been defined.
7999 Forward_declaration_type::real_type()
8001 if (this->is_defined())
8002 return this->named_object()->type_value();
8006 return Type::make_error_type();
8011 Forward_declaration_type::real_type() const
8013 if (this->is_defined())
8014 return this->named_object()->type_value();
8018 return Type::make_error_type();
8022 // Return whether the base type is defined.
8025 Forward_declaration_type::is_defined() const
8027 return this->named_object()->is_type();
8030 // Add a method. This is used when methods are defined before the
8034 Forward_declaration_type::add_method(const std::string
& name
,
8037 Named_object
* no
= this->named_object();
8038 if (no
->is_unknown())
8039 no
->declare_as_type();
8040 return no
->type_declaration_value()->add_method(name
, function
);
8043 // Add a method declaration. This is used when methods are declared
8047 Forward_declaration_type::add_method_declaration(const std::string
& name
,
8048 Function_type
* type
,
8049 source_location location
)
8051 Named_object
* no
= this->named_object();
8052 if (no
->is_unknown())
8053 no
->declare_as_type();
8054 Type_declaration
* td
= no
->type_declaration_value();
8055 return td
->add_method_declaration(name
, type
, location
);
8061 Forward_declaration_type::do_traverse(Traverse
* traverse
)
8063 if (this->is_defined()
8064 && Type::traverse(this->real_type(), traverse
) == TRAVERSE_EXIT
)
8065 return TRAVERSE_EXIT
;
8066 return TRAVERSE_CONTINUE
;
8069 // Get a tree for the type.
8072 Forward_declaration_type::do_get_tree(Gogo
* gogo
)
8074 if (this->is_defined())
8075 return Type::get_named_type_tree(gogo
, this->real_type());
8078 return error_mark_node
;
8080 // We represent an undefined type as a struct with no fields. That
8081 // should work fine for the middle-end, since the same case can
8083 Named_object
* no
= this->named_object();
8084 tree type_tree
= make_node(RECORD_TYPE
);
8085 tree id
= no
->get_id(gogo
);
8086 tree decl
= build_decl(no
->location(), TYPE_DECL
, id
, type_tree
);
8087 TYPE_NAME(type_tree
) = decl
;
8088 layout_type(type_tree
);
8092 // Build a type descriptor for a forwarded type.
8095 Forward_declaration_type::do_type_descriptor(Gogo
* gogo
, Named_type
* name
)
8097 if (!this->is_defined())
8098 return Expression::make_nil(BUILTINS_LOCATION
);
8101 Type
* t
= this->real_type();
8103 return this->named_type_descriptor(gogo
, t
, name
);
8105 return Expression::make_type_descriptor(t
, BUILTINS_LOCATION
);
8109 // The reflection string.
8112 Forward_declaration_type::do_reflection(Gogo
* gogo
, std::string
* ret
) const
8114 this->append_reflection(this->real_type(), gogo
, ret
);
8117 // The mangled name.
8120 Forward_declaration_type::do_mangled_name(Gogo
* gogo
, std::string
* ret
) const
8122 if (this->is_defined())
8123 this->append_mangled_name(this->real_type(), gogo
, ret
);
8126 const Named_object
* no
= this->named_object();
8128 if (no
->package() == NULL
)
8129 name
= gogo
->package_name();
8131 name
= no
->package()->name();
8133 name
+= Gogo::unpack_hidden_name(no
->name());
8135 snprintf(buf
, sizeof buf
, "N%u_",
8136 static_cast<unsigned int>(name
.length()));
8142 // Export a forward declaration. This can happen when a defined type
8143 // refers to a type which is only declared (and is presumably defined
8144 // in some other file in the same package).
8147 Forward_declaration_type::do_export(Export
*) const
8149 // If there is a base type, that should be exported instead of this.
8150 gcc_assert(!this->is_defined());
8152 // We don't output anything.
8155 // Make a forward declaration.
8158 Type::make_forward_declaration(Named_object
* named_object
)
8160 return new Forward_declaration_type(named_object
);
8163 // Class Typed_identifier_list.
8165 // Sort the entries by name.
8167 struct Typed_identifier_list_sort
8171 operator()(const Typed_identifier
& t1
, const Typed_identifier
& t2
) const
8172 { return t1
.name() < t2
.name(); }
8176 Typed_identifier_list::sort_by_name()
8178 std::sort(this->entries_
.begin(), this->entries_
.end(),
8179 Typed_identifier_list_sort());
8185 Typed_identifier_list::traverse(Traverse
* traverse
)
8187 for (Typed_identifier_list::const_iterator p
= this->begin();
8191 if (Type::traverse(p
->type(), traverse
) == TRAVERSE_EXIT
)
8192 return TRAVERSE_EXIT
;
8194 return TRAVERSE_CONTINUE
;
8199 Typed_identifier_list
*
8200 Typed_identifier_list::copy() const
8202 Typed_identifier_list
* ret
= new Typed_identifier_list();
8203 for (Typed_identifier_list::const_iterator p
= this->begin();
8206 ret
->push_back(Typed_identifier(p
->name(), p
->type(), p
->location()));