1 // types.h -- Go frontend types. -*- C++ -*-
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.
13 class Typed_identifier
;
14 class Typed_identifier_list
;
21 class Struct_field_list
;
29 class Forward_declaration_type
;
32 class Type_hash_identical
;
35 class Expression_list
;
36 class Call_expression
;
37 class Field_reference_expression
;
38 class Bound_method_expression
;
42 class Translate_context
;
46 // Type codes used in type descriptors. These must match the values
47 // in libgo/runtime/go-type.h. They also match the values in the gc
48 // compiler in src/cmd/gc/reflect.c and src/pkg/runtime/type.go,
49 // although this is not required.
51 static const int RUNTIME_TYPE_KIND_BOOL
= 1;
52 static const int RUNTIME_TYPE_KIND_INT
= 2;
53 static const int RUNTIME_TYPE_KIND_INT8
= 3;
54 static const int RUNTIME_TYPE_KIND_INT16
= 4;
55 static const int RUNTIME_TYPE_KIND_INT32
= 5;
56 static const int RUNTIME_TYPE_KIND_INT64
= 6;
57 static const int RUNTIME_TYPE_KIND_UINT
= 7;
58 static const int RUNTIME_TYPE_KIND_UINT8
= 8;
59 static const int RUNTIME_TYPE_KIND_UINT16
= 9;
60 static const int RUNTIME_TYPE_KIND_UINT32
= 10;
61 static const int RUNTIME_TYPE_KIND_UINT64
= 11;
62 static const int RUNTIME_TYPE_KIND_UINTPTR
= 12;
63 static const int RUNTIME_TYPE_KIND_FLOAT
= 13;
64 static const int RUNTIME_TYPE_KIND_FLOAT32
= 14;
65 static const int RUNTIME_TYPE_KIND_FLOAT64
= 15;
66 static const int RUNTIME_TYPE_KIND_COMPLEX
= 16;
67 static const int RUNTIME_TYPE_KIND_COMPLEX64
= 17;
68 static const int RUNTIME_TYPE_KIND_COMPLEX128
= 18;
69 static const int RUNTIME_TYPE_KIND_ARRAY
= 19;
70 static const int RUNTIME_TYPE_KIND_CHAN
= 20;
71 static const int RUNTIME_TYPE_KIND_FUNC
= 21;
72 static const int RUNTIME_TYPE_KIND_INTERFACE
= 22;
73 static const int RUNTIME_TYPE_KIND_MAP
= 23;
74 static const int RUNTIME_TYPE_KIND_PTR
= 24;
75 static const int RUNTIME_TYPE_KIND_SLICE
= 25;
76 static const int RUNTIME_TYPE_KIND_STRING
= 26;
77 static const int RUNTIME_TYPE_KIND_STRUCT
= 27;
78 static const int RUNTIME_TYPE_KIND_UNSAFE_POINTER
= 28;
80 // To build the complete list of methods for a named type we need to
81 // gather all methods from anonymous fields. Those methods may
82 // require an arbitrary set of indirections and field offsets. There
83 // is also the possibility of ambiguous methods, which we could ignore
84 // except that we want to give a better error message for that case.
85 // This is a base class. There are two types of methods: named
86 // methods, and methods which are inherited from an anonymous field of
92 // For methods in anonymous types we need to know the sequence of
93 // field references used to extract the pointer to pass to the
94 // method. Since each method for a particular anonymous field will
95 // have the sequence of field indexes, and since the indexes can be
96 // shared going down the chain, we use a manually managed linked
97 // list. The first entry in the list is the field index for the
98 // last field, the one passed to the method.
102 const Field_indexes
* next
;
103 unsigned int field_index
;
109 // Get the list of field indexes.
111 field_indexes() const
112 { return this->field_indexes_
; }
117 { return this->depth_
; }
119 // Return whether this is a value method--a method which does not
120 // require a pointer expression.
122 is_value_method() const
123 { return this->is_value_method_
; }
125 // Return whether we need a stub method--this is true if we can't
126 // just pass the main object to the method.
128 needs_stub_method() const
129 { return this->needs_stub_method_
; }
131 // Return whether this is an ambiguous method name.
134 { return this->is_ambiguous_
; }
136 // Note that this method is ambiguous.
139 { this->is_ambiguous_
= true; }
141 // Return the type of the method.
144 { return this->do_type(); }
146 // Return the location of the method receiver.
148 receiver_location() const
149 { return this->do_receiver_location(); }
151 // Return an expression which binds this method to EXPR. This is
152 // something which can be used with a function call.
154 bind_method(Expression
* expr
, source_location location
) const;
156 // Return the named object for this method. This may only be called
157 // after methods are finalized.
159 named_object() const;
161 // Get the stub object.
165 gcc_assert(this->stub_
!= NULL
);
169 // Set the stub object.
171 set_stub_object(Named_object
* no
)
173 gcc_assert(this->stub_
== NULL
);
178 // These objects are only built by the child classes.
179 Method(const Field_indexes
* field_indexes
, unsigned int depth
,
180 bool is_value_method
, bool needs_stub_method
)
181 : field_indexes_(field_indexes
), depth_(depth
), stub_(NULL
),
182 is_value_method_(is_value_method
), needs_stub_method_(needs_stub_method
),
186 // The named object for this method.
187 virtual Named_object
*
188 do_named_object() const = 0;
190 // The type of the method.
191 virtual Function_type
*
194 // Return the location of the method receiver.
195 virtual source_location
196 do_receiver_location() const = 0;
198 // Bind a method to an object.
200 do_bind_method(Expression
* expr
, source_location location
) const = 0;
203 // The sequence of field indexes used for this method. If this is
204 // NULL, then the method is defined for the current type.
205 const Field_indexes
* field_indexes_
;
206 // The depth at which this method was found.
208 // If a stub method is required, this is its object. This is only
209 // set after stub methods are built in finalize_methods.
211 // Whether this is a value method--a method that does not require a
213 bool is_value_method_
;
214 // Whether a stub method is required.
215 bool needs_stub_method_
;
216 // Whether this method is ambiguous.
220 // A named method. This is what you get with a method declaration,
221 // either directly on the type, or inherited from some anonymous
224 class Named_method
: public Method
227 Named_method(Named_object
* named_object
, const Field_indexes
* field_indexes
,
228 unsigned int depth
, bool is_value_method
,
229 bool needs_stub_method
)
230 : Method(field_indexes
, depth
, is_value_method
, needs_stub_method
),
231 named_object_(named_object
)
235 // Get the Named_object for the method.
237 do_named_object() const
238 { return this->named_object_
; }
240 // The type of the method.
244 // Return the location of the method receiver.
246 do_receiver_location() const;
248 // Bind a method to an object.
250 do_bind_method(Expression
* expr
, source_location location
) const;
253 // The method itself. For a method which needs a stub, this starts
254 // out as the underlying method, and is later replaced with the stub
256 Named_object
* named_object_
;
259 // An interface method. This is used when an interface appears as an
260 // anonymous field in a named struct.
262 class Interface_method
: public Method
265 Interface_method(const std::string
& name
, source_location location
,
266 Function_type
* fntype
, const Field_indexes
* field_indexes
,
268 : Method(field_indexes
, depth
, true, true),
269 name_(name
), location_(location
), fntype_(fntype
)
273 // Get the Named_object for the method. This should never be
274 // called, as we always create a stub.
276 do_named_object() const
277 { gcc_unreachable(); }
279 // The type of the method.
282 { return this->fntype_
; }
284 // Return the location of the method receiver.
286 do_receiver_location() const
287 { return this->location_
; }
289 // Bind a method to an object.
291 do_bind_method(Expression
* expr
, source_location location
) const;
294 // The name of the interface method to call.
296 // The location of the definition of the interface method.
297 source_location location_
;
298 // The type of the interface method.
299 Function_type
* fntype_
;
302 // A mapping from method name to Method. This is a wrapper around a
308 typedef Unordered_map(std::string
, Method
*) Method_map
;
311 typedef Method_map::const_iterator const_iterator
;
317 // Insert a new method. Returns true if it was inserted, false if
318 // it was overidden or ambiguous.
320 insert(const std::string
& name
, Method
* m
);
322 // The number of (unambiguous) methods.
329 { return this->methods_
.begin(); }
333 { return this->methods_
.end(); }
337 find(const std::string
& name
) const
338 { return this->methods_
.find(name
); }
344 // The base class for all types.
349 // The types of types.
350 enum Type_classification
363 TYPE_CALL_MULTIPLE_RESULT
,
383 // Get the unnamed bool type.
387 // Get the named type "bool".
391 // Make the named type "bool".
393 make_named_bool_type();
395 // Make an abstract integer type.
397 make_abstract_integer_type();
399 // Make a named integer type with a specified size.
400 // RUNTIME_TYPE_KIND is the code to use in reflection information,
401 // to distinguish int and int32.
403 make_integer_type(const char* name
, bool is_unsigned
, int bits
,
404 int runtime_type_kind
);
406 // Look up a named integer type.
408 lookup_integer_type(const char* name
);
410 // Make an abstract floating point type.
412 make_abstract_float_type();
414 // Make a named floating point type with a specific size.
415 // RUNTIME_TYPE_KIND is the code to use in reflection information,
416 // to distinguish float and float32.
418 make_float_type(const char* name
, int bits
, int runtime_type_kind
);
420 // Look up a named float type.
422 lookup_float_type(const char* name
);
424 // Make an abstract complex type.
426 make_abstract_complex_type();
428 // Make a named complex type with a specific size.
429 // RUNTIME_TYPE_KIND is the code to use in reflection information,
430 // to distinguish complex and complex64.
432 make_complex_type(const char* name
, int bits
, int runtime_type_kind
);
434 // Look up a named complex type.
436 lookup_complex_type(const char* name
);
438 // Get the unnamed string type.
442 // Get the named type "string".
444 lookup_string_type();
446 // Make the named type "string".
448 make_named_string_type();
453 static Function_type
*
454 make_function_type(Typed_identifier
* receiver
,
455 Typed_identifier_list
* parameters
,
456 Typed_identifier_list
* results
,
460 make_pointer_type(Type
*);
466 make_call_multiple_result_type(Call_expression
*);
469 make_struct_type(Struct_field_list
* fields
, source_location
);
472 make_array_type(Type
* element_type
, Expression
* length
);
475 make_map_type(Type
* key_type
, Type
* value_type
, source_location
);
478 make_channel_type(bool send
, bool receive
, Type
*);
480 static Interface_type
*
481 make_interface_type(Typed_identifier_list
* methods
, source_location
);
484 make_type_descriptor_type();
487 make_type_descriptor_ptr_type();
490 make_named_type(Named_object
*, Type
*, source_location
);
493 make_forward_declaration(Named_object
*);
497 traverse(Type
*, Traverse
*);
499 // Verify the type. This is called after parsing, and verifies that
500 // types are complete and meet the language requirements. This
501 // returns false if the type is invalid.
504 { return this->do_verify(); }
506 // Return true if two types are identical. If this returns false,
507 // and REASON is not NULL, it may set *REASON.
509 are_identical(const Type
* lhs
, const Type
* rhs
, std::string
* reason
);
511 // Return true if two types are identical when it comes to putting
512 // them in a hash table. This differs from are_identical only in
513 // how error types are handled.
515 are_identical_for_hash_table(const Type
*, const Type
*);
517 // Return true if two types are compatible for use in a binary
518 // operation, other than a shift, comparison, or channel send. This
519 // is an equivalence relation.
521 are_compatible_for_binop(const Type
* t1
, const Type
* t2
);
523 // Return true if a value with type RHS is assignable to a variable
524 // with type LHS. This is not an equivalence relation. If this
525 // returns false, and REASON is not NULL, it sets *REASON.
527 are_assignable(const Type
* lhs
, const Type
* rhs
, std::string
* reason
);
529 // Return true if a value with type RHS may be converted to type
530 // LHS. If this returns false, and REASON is not NULL, it sets
533 are_convertible(const Type
* lhs
, const Type
* rhs
, std::string
* reason
);
535 // Whether this type has any hidden fields which are not visible in
536 // the current compilation, such as a field whose name begins with a
537 // lower case letter in a struct imported from a different package.
538 // WITHIN is not NULL if we are looking at fields in a named type.
540 has_hidden_fields(const Named_type
* within
, std::string
* reason
) const;
542 // Return a hash code for this type for the method hash table.
543 // Types which are equivalent according to are_identical will have
544 // the same hash code.
546 hash_for_method(Gogo
*) const;
548 // Return the type classification.
550 classification() const
551 { return this->classification_
; }
553 // Return the base type for this type. This looks through forward
554 // declarations and names. Using this with a forward declaration
555 // which has not been defined will return an error type.
562 // Return the type skipping defined forward declarations. If this
563 // type is a forward declaration which has not been defined, it will
564 // return the Forward_declaration_type. This differs from base() in
565 // that it will return a Named_type, and for a
566 // Forward_declaration_type which is not defined it will return that
567 // type rather than an error type.
574 // Return true if this is a basic type: a type which is not composed
575 // of other types, and is not void.
577 is_basic_type() const;
579 // Return true if this is an abstract type--an integer, floating
580 // point, or complex type whose size has not been determined.
584 // Return a non-abstract version of an abstract type.
586 make_non_abstract_type();
588 // Return true if this type is or contains a pointer. This
589 // determines whether the garbage collector needs to look at a value
593 { return this->do_has_pointer(); }
595 // Return true if this is an error type. An error type indicates a
598 is_error_type() const;
600 // Return true if this is a void type.
603 { return this->classification_
== TYPE_VOID
; }
605 // If this is an integer type, return the Integer_type. Otherwise,
606 // return NULL. This is a controlled dynamic_cast.
609 { return this->convert
<Integer_type
, TYPE_INTEGER
>(); }
613 { return this->convert
<const Integer_type
, TYPE_INTEGER
>(); }
615 // If this is a floating point type, return the Float_type.
616 // Otherwise, return NULL. This is a controlled dynamic_cast.
619 { return this->convert
<Float_type
, TYPE_FLOAT
>(); }
623 { return this->convert
<const Float_type
, TYPE_FLOAT
>(); }
625 // If this is a complex type, return the Complex_type. Otherwise,
629 { return this->convert
<Complex_type
, TYPE_COMPLEX
>(); }
633 { return this->convert
<const Complex_type
, TYPE_COMPLEX
>(); }
635 // Return true if this is a boolean type.
637 is_boolean_type() const
638 { return this->base()->classification_
== TYPE_BOOLEAN
; }
640 // Return true if this is an abstract boolean type.
642 is_abstract_boolean_type() const
643 { return this->classification_
== TYPE_BOOLEAN
; }
645 // Return true if this is a string type.
647 is_string_type() const
648 { return this->base()->classification_
== TYPE_STRING
; }
650 // Return true if this is an abstract string type.
652 is_abstract_string_type() const
653 { return this->classification_
== TYPE_STRING
; }
655 // Return true if this is the sink type. This is the type of the
656 // blank identifier _.
659 { return this->base()->classification_
== TYPE_SINK
; }
661 // If this is a function type, return it. Otherwise, return NULL.
664 { return this->convert
<Function_type
, TYPE_FUNCTION
>(); }
667 function_type() const
668 { return this->convert
<const Function_type
, TYPE_FUNCTION
>(); }
670 // If this is a pointer type, return the type to which it points.
671 // Otherwise, return NULL.
675 // If this is a pointer type, return the type to which it points.
676 // Otherwise, return the type itself.
680 Type
* pt
= this->points_to();
681 return pt
!= NULL
? pt
: this;
687 const Type
* pt
= this->points_to();
688 return pt
!= NULL
? pt
: this;
691 // Return true if this is the nil type. We don't use base() here,
692 // because this can be called during parse, and there is no way to
693 // name the nil type anyhow.
696 { return this->classification_
== TYPE_NIL
; }
698 // Return true if this is the predeclared constant nil being used as
699 // a type. This is what the parser produces for type switches which
702 is_nil_constant_as_type() const;
704 // Return true if this is the return type of a function which
705 // returns multiple values.
707 is_call_multiple_result_type() const
708 { return this->base()->classification_
== TYPE_CALL_MULTIPLE_RESULT
; }
710 // If this is a struct type, return it. Otherwise, return NULL.
713 { return this->convert
<Struct_type
, TYPE_STRUCT
>(); }
717 { return this->convert
<const Struct_type
, TYPE_STRUCT
>(); }
719 // If this is an array type, return it. Otherwise, return NULL.
722 { return this->convert
<Array_type
, TYPE_ARRAY
>(); }
726 { return this->convert
<const Array_type
, TYPE_ARRAY
>(); }
728 // Return whether if this is an open array type.
730 is_open_array_type() const;
732 // If this is a map type, return it. Otherwise, return NULL.
735 { return this->convert
<Map_type
, TYPE_MAP
>(); }
739 { return this->convert
<const Map_type
, TYPE_MAP
>(); }
741 // If this is a channel type, return it. Otherwise, return NULL.
744 { return this->convert
<Channel_type
, TYPE_CHANNEL
>(); }
748 { return this->convert
<const Channel_type
, TYPE_CHANNEL
>(); }
750 // If this is an interface type, return it. Otherwise, return NULL.
753 { return this->convert
<Interface_type
, TYPE_INTERFACE
>(); }
755 const Interface_type
*
756 interface_type() const
757 { return this->convert
<const Interface_type
, TYPE_INTERFACE
>(); }
759 // If this is a named type, return it. Otherwise, return NULL.
766 // If this is a forward declaration, return it. Otherwise, return
768 Forward_declaration_type
*
769 forward_declaration_type()
770 { return this->convert_no_base
<Forward_declaration_type
, TYPE_FORWARD
>(); }
772 const Forward_declaration_type
*
773 forward_declaration_type() const
775 return this->convert_no_base
<const Forward_declaration_type
,
779 // Return true if this type is not yet defined.
781 is_undefined() const;
783 // Return true if this is the unsafe.pointer type. We currently
784 // represent that as pointer-to-void.
786 is_unsafe_pointer_type() const
787 { return this->points_to() != NULL
&& this->points_to()->is_void_type(); }
789 // Look for field or method NAME for TYPE. Return an expression for
790 // it, bound to EXPR.
792 bind_field_or_method(Gogo
*, const Type
* type
, Expression
* expr
,
793 const std::string
& name
, source_location
);
795 // Return true if NAME is an unexported field or method of TYPE.
797 is_unexported_field_or_method(Gogo
*, const Type
*, const std::string
&);
799 // This type was passed to the builtin function make. ARGS are the
800 // arguments passed to make after the type; this may be NULL if
801 // there were none. Issue any required errors.
803 check_make_expression(Expression_list
* args
, source_location location
)
804 { return this->do_check_make_expression(args
, location
); }
806 // Return a tree representing this type.
810 // Return a tree representing a zero initialization for this type.
811 // This will be something like an INTEGER_CST or a CONSTRUCTOR. If
812 // IS_CLEAR is true, then the memory is known to be zeroed; in that
813 // case, this will return NULL if there is nothing to be done.
815 get_init_tree(Gogo
*, bool is_clear
);
817 // Like get_init_tree, but passing in the type to use for the
820 get_typed_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
821 { return this->do_get_init_tree(gogo
, type_tree
, is_clear
); }
823 // Return a tree for a make expression applied to this type.
825 make_expression_tree(Translate_context
* context
, Expression_list
* args
,
826 source_location location
)
827 { return this->do_make_expression_tree(context
, args
, location
); }
829 // Build a type descriptor entry for this type. Return a pointer to
832 type_descriptor_pointer(Gogo
* gogo
);
834 // Return the type reflection string for this type.
836 reflection(Gogo
*) const;
838 // Return a mangled name for the type. This is a name which can be
839 // used in assembler code. Identical types should have the same
842 mangled_name(Gogo
*) const;
846 export_type(Export
* exp
) const
847 { this->do_export(exp
); }
851 import_type(Import
*);
854 Type(Type_classification
);
856 // Functions implemented by the child class.
858 // Traverse the subtypes.
860 do_traverse(Traverse
*);
868 do_has_pointer() const
872 do_hash_for_method(Gogo
*) const;
875 do_check_make_expression(Expression_list
* args
, source_location
);
879 do_get_tree(Gogo
*) = 0;
882 do_get_init_tree(Gogo
*, tree
, bool) = 0;
885 do_make_expression_tree(Translate_context
*, Expression_list
*,
889 do_type_descriptor(Gogo
*, Named_type
* name
) = 0;
892 do_reflection(Gogo
*, std::string
*) const = 0;
896 do_mangled_name(Gogo
*, std::string
*) const = 0;
899 do_export(Export
*) const;
901 // Return whether an expression is an integer.
903 check_int_value(Expression
*, const char*, source_location
);
905 // Return whether a method expects a pointer as the receiver.
907 method_expects_pointer(const Named_object
*);
909 // Finalize the methods for a type.
911 finalize_methods(Gogo
*, const Type
*, source_location
, Methods
**);
913 // Return a method from a set of methods.
915 method_function(const Methods
*, const std::string
& name
,
918 // Return a composite literal for the type descriptor entry for a
921 type_descriptor(Gogo
*, Type
*);
923 // Return a composite literal for the type descriptor entry for
924 // TYPE, using NAME as the name of the type.
926 named_type_descriptor(Gogo
*, Type
* type
, Named_type
* name
);
928 // Return a composite literal for a plain type descriptor for this
929 // type with the given kind and name.
931 plain_type_descriptor(Gogo
*, int runtime_type_kind
, Named_type
* name
);
933 // Build a composite literal for the basic type descriptor.
935 type_descriptor_constructor(Gogo
*, int runtime_type_kind
, Named_type
*,
936 const Methods
*, bool only_value_methods
);
938 // Make a builtin struct type from a list of fields.
940 make_builtin_struct_type(int nfields
, ...);
942 // Make a builtin named type.
944 make_builtin_named_type(const char* name
, Type
* type
);
946 // For the benefit of child class reflection string generation.
948 append_reflection(const Type
* type
, Gogo
* gogo
, std::string
* ret
) const
949 { type
->do_reflection(gogo
, ret
); }
951 // For the benefit of child class mangling.
953 append_mangled_name(const Type
* type
, Gogo
* gogo
, std::string
* ret
) const
954 { type
->do_mangled_name(gogo
, ret
); }
956 // Incorporate a string into a hash code.
958 hash_string(const std::string
&, unsigned int);
960 // Return a tree for the underlying type of a named type.
962 get_named_type_tree(Gogo
* gogo
, Type
* base_type
)
963 { return base_type
->get_tree_without_hash(gogo
); }
966 // Convert to the desired type classification, or return NULL. This
967 // is a controlled dynamic_cast.
968 template<typename Type_class
, Type_classification type_classification
>
972 Type
* base
= this->base();
973 return (base
->classification_
== type_classification
974 ? static_cast<Type_class
*>(base
)
978 template<typename Type_class
, Type_classification type_classification
>
982 const Type
* base
= this->base();
983 return (base
->classification_
== type_classification
984 ? static_cast<Type_class
*>(base
)
988 template<typename Type_class
, Type_classification type_classification
>
992 return (this->classification_
== type_classification
993 ? static_cast<Type_class
*>(this)
997 template<typename Type_class
, Type_classification type_classification
>
999 convert_no_base() const
1001 return (this->classification_
== type_classification
1002 ? static_cast<Type_class
*>(this)
1006 // Get the hash and equality functions for a type.
1008 type_functions(const char** hash_fn
, const char** equal_fn
) const;
1010 // Build a composite literal for the uncommon type information.
1012 uncommon_type_constructor(Gogo
*, Type
* uncommon_type
,
1013 Named_type
*, const Methods
*,
1014 bool only_value_methods
) const;
1016 // Build a composite literal for the methods.
1018 methods_constructor(Gogo
*, Type
* methods_type
, const Methods
*,
1019 bool only_value_methods
) const;
1021 // Build a composite literal for one method.
1023 method_constructor(Gogo
*, Type
* method_type
, const std::string
& name
,
1024 const Method
*) const;
1027 build_receive_return_type(tree type
);
1029 // A hash table we use to avoid infinite recursion.
1030 typedef Unordered_set_hash(const Named_type
*, Type_hash_identical
,
1031 Type_identical
) Types_seen
;
1033 // Add all methods for TYPE to the list of methods for THIS.
1035 add_methods_for_type(const Type
* type
, const Method::Field_indexes
*,
1036 unsigned int depth
, bool, bool, Types_seen
*,
1040 add_local_methods_for_type(const Named_type
* type
,
1041 const Method::Field_indexes
*,
1042 unsigned int depth
, bool, bool, Methods
**);
1045 add_embedded_methods_for_type(const Type
* type
,
1046 const Method::Field_indexes
*,
1047 unsigned int depth
, bool, bool, Types_seen
*,
1051 add_interface_methods_for_type(const Type
* type
,
1052 const Method::Field_indexes
*,
1053 unsigned int depth
, Methods
**);
1055 // Build stub methods for a type.
1057 build_stub_methods(Gogo
*, const Type
* type
, const Methods
* methods
,
1061 build_one_stub_method(Gogo
*, Method
*, const char* receiver_name
,
1062 const Typed_identifier_list
*, bool is_varargs
,
1066 apply_field_indexes(Expression
*, const Method::Field_indexes
*,
1069 // Look for a field or method named NAME in TYPE.
1071 find_field_or_method(const Type
* type
, const std::string
& name
,
1072 bool receiver_can_be_pointer
,
1073 int* level
, bool* is_method
,
1074 bool* found_pointer_method
,
1075 std::string
* ambig1
, std::string
* ambig2
);
1077 // Get a tree for a type without looking in the hash table for
1080 get_tree_without_hash(Gogo
*);
1082 // A mapping from Type to tree, used to ensure that the GIMPLE
1083 // representation of identical types is identical.
1084 typedef Unordered_map_hash(const Type
*, tree
, Type_hash_identical
,
1085 Type_identical
) Type_trees
;
1087 static Type_trees type_trees
;
1089 // The type classification.
1090 Type_classification classification_
;
1091 // The tree representation of the type, once it has been determined.
1093 // The decl for the type descriptor for this type. This starts out
1094 // as NULL and is filled in as needed.
1095 tree type_descriptor_decl_
;
1098 // Type hash table operations.
1100 class Type_hash_identical
1104 operator()(const Type
* type
) const
1105 { return type
->hash_for_method(NULL
); }
1108 class Type_identical
1112 operator()(const Type
* t1
, const Type
* t2
) const
1113 { return Type::are_identical_for_hash_table(t1
, t2
); }
1116 // An identifier with a type.
1118 class Typed_identifier
1121 Typed_identifier(const std::string
& name
, Type
* type
,
1122 source_location location
)
1123 : name_(name
), type_(type
), location_(location
)
1129 { return this->name_
; }
1134 { return this->type_
; }
1136 // Return the location where the name was seen. This is not always
1140 { return this->location_
; }
1142 // Set the type--sometimes we see the identifier before the type.
1144 set_type(Type
* type
)
1146 gcc_assert(this->type_
== NULL
|| type
->is_error_type());
1155 // The location where the name was seen.
1156 source_location location_
;
1159 // A list of Typed_identifiers.
1161 class Typed_identifier_list
1164 Typed_identifier_list()
1168 // Whether the list is empty.
1171 { return this->entries_
.empty(); }
1173 // Return the number of entries in the list.
1176 { return this->entries_
.size(); }
1178 // Add an entry to the end of the list.
1180 push_back(const Typed_identifier
& td
)
1181 { this->entries_
.push_back(td
); }
1183 // Remove an entry from the end of the list.
1186 { this->entries_
.pop_back(); }
1188 // Set the type of entry I to TYPE.
1190 set_type(size_t i
, Type
* type
)
1192 gcc_assert(i
< this->entries_
.size());
1193 this->entries_
[i
].set_type(type
);
1196 // Sort the entries by name.
1202 traverse(Traverse
*);
1204 // Return the first and last elements.
1207 { return this->entries_
.front(); }
1209 const Typed_identifier
&
1211 { return this->entries_
.front(); }
1215 { return this->entries_
.back(); }
1217 const Typed_identifier
&
1219 { return this->entries_
.back(); }
1221 const Typed_identifier
&
1223 { return this->entries_
.at(i
); }
1226 set(size_t i
, const Typed_identifier
& t
)
1227 { this->entries_
.at(i
) = t
; }
1232 gcc_assert(c
<= this->entries_
.size());
1233 this->entries_
.resize(c
, Typed_identifier("", NULL
, UNKNOWN_LOCATION
));
1238 typedef std::vector
<Typed_identifier
>::iterator iterator
;
1239 typedef std::vector
<Typed_identifier
>::const_iterator const_iterator
;
1243 { return this->entries_
.begin(); }
1247 { return this->entries_
.begin(); }
1251 { return this->entries_
.end(); }
1255 { return this->entries_
.end(); }
1257 // Return a copy of this list. This returns an independent copy of
1258 // the vector, but does not copy the types.
1259 Typed_identifier_list
*
1263 std::vector
<Typed_identifier
> entries_
;
1266 // The type of an integer.
1268 class Integer_type
: public Type
1271 // Create a new integer type.
1273 create_integer_type(const char* name
, bool is_unsigned
, int bits
,
1274 int runtime_type_kind
);
1276 // Look up an existing integer type.
1278 lookup_integer_type(const char* name
);
1280 // Create an abstract integer type.
1281 static Integer_type
*
1282 create_abstract_integer_type();
1284 // Whether this is an abstract integer type.
1287 { return this->is_abstract_
; }
1289 // Whether this is an unsigned type.
1292 { return this->is_unsigned_
; }
1294 // The number of bits.
1297 { return this->bits_
; }
1299 // Whether this type is the same as T.
1301 is_identical(const Integer_type
* t
) const;
1305 do_hash_for_method(Gogo
*) const;
1311 do_get_init_tree(Gogo
*, tree
, bool);
1314 do_type_descriptor(Gogo
*, Named_type
*);
1317 do_reflection(Gogo
*, std::string
*) const;
1320 do_mangled_name(Gogo
*, std::string
*) const;
1323 Integer_type(bool is_abstract
, bool is_unsigned
, int bits
,
1324 int runtime_type_kind
)
1325 : Type(TYPE_INTEGER
),
1326 is_abstract_(is_abstract
), is_unsigned_(is_unsigned
), bits_(bits
),
1327 runtime_type_kind_(runtime_type_kind
)
1330 // Map names of integer types to the types themselves.
1331 typedef std::map
<std::string
, Named_type
*> Named_integer_types
;
1332 static Named_integer_types named_integer_types
;
1334 // True if this is an abstract type.
1336 // True if this is an unsigned type.
1338 // The number of bits.
1340 // The runtime type code used in the type descriptor for this type.
1341 int runtime_type_kind_
;
1344 // The type of a floating point number.
1346 class Float_type
: public Type
1349 // Create a new float type.
1351 create_float_type(const char* name
, int bits
, int runtime_type_kind
);
1353 // Look up an existing float type.
1355 lookup_float_type(const char* name
);
1357 // Create an abstract float type.
1359 create_abstract_float_type();
1361 // Whether this is an abstract float type.
1364 { return this->is_abstract_
; }
1366 // The number of bits.
1369 { return this->bits_
; }
1371 // Whether this type is the same as T.
1373 is_identical(const Float_type
* t
) const;
1375 // Return a tree for this type without using a Gogo*.
1381 do_hash_for_method(Gogo
*) const;
1387 do_get_init_tree(Gogo
*, tree
, bool);
1390 do_type_descriptor(Gogo
*, Named_type
*);
1393 do_reflection(Gogo
*, std::string
*) const;
1396 do_mangled_name(Gogo
*, std::string
*) const;
1399 Float_type(bool is_abstract
, int bits
, int runtime_type_kind
)
1401 is_abstract_(is_abstract
), bits_(bits
),
1402 runtime_type_kind_(runtime_type_kind
)
1405 // Map names of float types to the types themselves.
1406 typedef std::map
<std::string
, Named_type
*> Named_float_types
;
1407 static Named_float_types named_float_types
;
1409 // True if this is an abstract type.
1411 // The number of bits in the floating point value.
1413 // The runtime type code used in the type descriptor for this type.
1414 int runtime_type_kind_
;
1417 // The type of a complex number.
1419 class Complex_type
: public Type
1422 // Create a new complex type.
1424 create_complex_type(const char* name
, int bits
, int runtime_type_kind
);
1426 // Look up an existing complex type.
1428 lookup_complex_type(const char* name
);
1430 // Create an abstract complex type.
1431 static Complex_type
*
1432 create_abstract_complex_type();
1434 // Whether this is an abstract complex type.
1437 { return this->is_abstract_
; }
1439 // The number of bits: 64 or 128.
1441 { return this->bits_
; }
1443 // Whether this type is the same as T.
1445 is_identical(const Complex_type
* t
) const;
1447 // Return a tree for this type without using a Gogo*.
1453 do_hash_for_method(Gogo
*) const;
1459 do_get_init_tree(Gogo
*, tree
, bool);
1462 do_type_descriptor(Gogo
*, Named_type
*);
1465 do_reflection(Gogo
*, std::string
*) const;
1468 do_mangled_name(Gogo
*, std::string
*) const;
1471 Complex_type(bool is_abstract
, int bits
, int runtime_type_kind
)
1472 : Type(TYPE_COMPLEX
),
1473 is_abstract_(is_abstract
), bits_(bits
),
1474 runtime_type_kind_(runtime_type_kind
)
1477 // Map names of complex types to the types themselves.
1478 typedef std::map
<std::string
, Named_type
*> Named_complex_types
;
1479 static Named_complex_types named_complex_types
;
1481 // True if this is an abstract type.
1483 // The number of bits in the complex value--64 or 128.
1485 // The runtime type code used in the type descriptor for this type.
1486 int runtime_type_kind_
;
1489 // The type of a string.
1491 class String_type
: public Type
1498 // Return a tree for the length of STRING.
1500 length_tree(Gogo
*, tree string
);
1502 // Return a tree which points to the bytes of STRING.
1504 bytes_tree(Gogo
*, tree string
);
1508 do_has_pointer() const
1515 do_get_init_tree(Gogo
* gogo
, tree
, bool);
1518 do_type_descriptor(Gogo
*, Named_type
*);
1521 do_reflection(Gogo
*, std::string
*) const;
1524 do_mangled_name(Gogo
*, std::string
* ret
) const;
1527 // The named string type.
1528 static Named_type
* string_type_
;
1531 // The type of a function.
1533 class Function_type
: public Type
1536 Function_type(Typed_identifier
* receiver
, Typed_identifier_list
* parameters
,
1537 Typed_identifier_list
* results
, source_location location
)
1538 : Type(TYPE_FUNCTION
),
1539 receiver_(receiver
), parameters_(parameters
), results_(results
),
1540 location_(location
), is_varargs_(false), is_builtin_(false)
1543 // Get the receiver.
1544 const Typed_identifier
*
1546 { return this->receiver_
; }
1548 // Get the return names and types.
1549 const Typed_identifier_list
*
1551 { return this->results_
; }
1553 // Get the parameter names and types.
1554 const Typed_identifier_list
*
1556 { return this->parameters_
; }
1558 // Whether this is a varargs function.
1561 { return this->is_varargs_
; }
1563 // Whether this is a builtin function.
1566 { return this->is_builtin_
; }
1568 // The location where this type was defined.
1571 { return this->location_
; }
1573 // Return whether this is a method type.
1576 { return this->receiver_
!= NULL
; }
1578 // Whether T is a valid redeclaration of this type. This is called
1579 // when a function is declared more than once.
1581 is_valid_redeclaration(const Function_type
* t
, std::string
*) const;
1583 // Whether this type is the same as T.
1585 is_identical(const Function_type
* t
, bool ignore_receiver
,
1586 std::string
*) const;
1588 // Record that this is a varargs function.
1591 { this->is_varargs_
= true; }
1593 // Record that this is a builtin function.
1596 { this->is_builtin_
= true; }
1598 // Import a function type.
1599 static Function_type
*
1602 // Return a copy of this type without a receiver. This is only
1603 // valid for a method type.
1605 copy_without_receiver() const;
1607 // Return a copy of this type with a receiver. This is used when an
1608 // interface method is attached to a named or struct type.
1610 copy_with_receiver(Type
*) const;
1614 do_traverse(Traverse
*);
1616 // A trampoline function has a pointer which matters for GC.
1618 do_has_pointer() const
1622 do_hash_for_method(Gogo
*) const;
1628 do_get_init_tree(Gogo
*, tree
, bool);
1631 do_type_descriptor(Gogo
*, Named_type
*);
1634 do_reflection(Gogo
*, std::string
*) const;
1637 do_mangled_name(Gogo
*, std::string
*) const;
1640 do_export(Export
*) const;
1644 make_function_type_descriptor_type();
1647 type_descriptor_params(Type
*, const Typed_identifier
*,
1648 const Typed_identifier_list
*);
1650 // The receiver name and type. This will be NULL for a normal
1651 // function, non-NULL for a method.
1652 Typed_identifier
* receiver_
;
1653 // The parameter names and types.
1654 Typed_identifier_list
* parameters_
;
1655 // The result names and types. This will be NULL if no result was
1657 Typed_identifier_list
* results_
;
1658 // The location where this type was defined. This exists solely to
1659 // give a location for the fields of the struct if this function
1660 // returns multiple values.
1661 source_location location_
;
1662 // Whether this function takes a variable number of arguments.
1664 // Whether this is a special builtin function which can not simply
1665 // be called. This is used for len, cap, etc.
1669 // The type of a pointer.
1671 class Pointer_type
: public Type
1674 Pointer_type(Type
* to_type
)
1675 : Type(TYPE_POINTER
),
1681 { return this->to_type_
; }
1683 // Import a pointer type.
1684 static Pointer_type
*
1689 do_traverse(Traverse
*);
1692 do_has_pointer() const
1696 do_hash_for_method(Gogo
*) const;
1702 do_get_init_tree(Gogo
*, tree
, bool);
1705 do_type_descriptor(Gogo
*, Named_type
*);
1708 do_reflection(Gogo
*, std::string
*) const;
1711 do_mangled_name(Gogo
*, std::string
*) const;
1714 do_export(Export
*) const;
1718 make_pointer_type_descriptor_type();
1720 // The type to which this type points.
1724 // The type of a field in a struct.
1729 explicit Struct_field(const Typed_identifier
& typed_identifier
)
1730 : typed_identifier_(typed_identifier
), tag_(NULL
)
1740 { return this->typed_identifier_
.type(); }
1742 // The field location.
1745 { return this->typed_identifier_
.location(); }
1747 // Whether the field has a tag.
1750 { return this->tag_
!= NULL
; }
1756 gcc_assert(this->tag_
!= NULL
);
1760 // Whether this is an anonymous field.
1762 is_anonymous() const
1763 { return this->typed_identifier_
.name().empty(); }
1765 // Set the tag. FIXME: This is never freed.
1767 set_tag(const std::string
& tag
)
1768 { this->tag_
= new std::string(tag
); }
1770 // Set the type. This is only used in error cases.
1772 set_type(Type
* type
)
1773 { this->typed_identifier_
.set_type(type
); }
1776 // The field name, type, and location.
1777 Typed_identifier typed_identifier_
;
1778 // The field tag. This is NULL if the field has no tag.
1782 // A list of struct fields.
1784 class Struct_field_list
1791 // Whether the list is empty.
1794 { return this->entries_
.empty(); }
1796 // Return the number of entries.
1799 { return this->entries_
.size(); }
1801 // Add an entry to the end of the list.
1803 push_back(const Struct_field
& sf
)
1804 { this->entries_
.push_back(sf
); }
1806 // Index into the list.
1809 { return this->entries_
.at(i
); }
1811 // Last entry in list.
1814 { return this->entries_
.back(); }
1818 typedef std::vector
<Struct_field
>::iterator iterator
;
1819 typedef std::vector
<Struct_field
>::const_iterator const_iterator
;
1823 { return this->entries_
.begin(); }
1827 { return this->entries_
.begin(); }
1831 { return this->entries_
.end(); }
1835 { return this->entries_
.end(); }
1838 std::vector
<Struct_field
> entries_
;
1841 // The type of a struct.
1843 class Struct_type
: public Type
1846 Struct_type(Struct_field_list
* fields
, source_location location
)
1847 : Type(TYPE_STRUCT
),
1848 fields_(fields
), location_(location
), all_methods_(NULL
)
1851 // Return the field NAME. This only looks at local fields, not at
1852 // embedded types. If the field is found, and PINDEX is not NULL,
1853 // this sets *PINDEX to the field index. If the field is not found,
1854 // this returns NULL.
1856 find_local_field(const std::string
& name
, unsigned int *pindex
) const;
1858 // Return the field number INDEX.
1860 field(unsigned int index
) const
1861 { return &this->fields_
->at(index
); }
1863 // Get the struct fields.
1864 const Struct_field_list
*
1866 { return this->fields_
; }
1868 // Return the number of fields.
1871 { return this->fields_
->size(); }
1873 // Push a new field onto the end of the struct. This is used when
1874 // building a closure variable.
1876 push_field(const Struct_field
& sf
)
1877 { this->fields_
->push_back(sf
); }
1879 // Return an expression referring to field NAME in STRUCT_EXPR, or
1880 // NULL if there is no field with that name.
1881 Field_reference_expression
*
1882 field_reference(Expression
* struct_expr
, const std::string
& name
,
1883 source_location
) const;
1885 // Return the total number of fields, including embedded fields.
1886 // This is the number of values which can appear in a conversion to
1889 total_field_count() const;
1891 // Whether this type is identical with T.
1893 is_identical(const Struct_type
* t
) const;
1895 // Whether this struct type has any hidden fields. This returns
1896 // true if any fields have hidden names, or if any non-pointer
1897 // anonymous fields have types with hidden fields.
1899 struct_has_hidden_fields(const Named_type
* within
, std::string
*) const;
1901 // Return whether NAME is a local field which is not exported. This
1902 // is only used for better error reporting.
1904 is_unexported_local_field(Gogo
*, const std::string
& name
) const;
1906 // If this is an unnamed struct, build the complete list of methods,
1907 // including those from anonymous fields, and build methods stubs if
1910 finalize_methods(Gogo
*);
1912 // Return whether this type has any methods. This should only be
1913 // called after the finalize_methods pass.
1915 has_any_methods() const
1916 { return this->all_methods_
!= NULL
; }
1918 // Return the methods for tihs type. This should only be called
1919 // after the finalize_methods pass.
1922 { return this->all_methods_
; }
1924 // Return the method to use for NAME. This returns NULL if there is
1925 // no such method or if the method is ambiguous. When it returns
1926 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
1928 method_function(const std::string
& name
, bool* is_ambiguous
) const;
1930 // Traverse just the field types of a struct type.
1932 traverse_field_types(Traverse
* traverse
)
1933 { return this->do_traverse(traverse
); }
1935 // Import a struct type.
1939 // Fill in the fields for a named struct type.
1941 fill_in_tree(Gogo
*, tree
);
1945 do_traverse(Traverse
*);
1951 do_has_pointer() const;
1954 do_hash_for_method(Gogo
*) const;
1960 do_get_init_tree(Gogo
*, tree
, bool);
1963 do_type_descriptor(Gogo
*, Named_type
*);
1966 do_reflection(Gogo
*, std::string
*) const;
1969 do_mangled_name(Gogo
*, std::string
*) const;
1972 do_export(Export
*) const;
1975 Field_reference_expression
*
1976 field_reference_depth(Expression
* struct_expr
, const std::string
& name
,
1977 source_location
, unsigned int* depth
) const;
1980 make_struct_type_descriptor_type();
1982 // The fields of the struct.
1983 Struct_field_list
* fields_
;
1984 // The place where the struct was declared.
1985 source_location location_
;
1986 // If this struct is unnamed, a list of methods.
1987 Methods
* all_methods_
;
1990 // The type of an array.
1992 class Array_type
: public Type
1995 Array_type(Type
* element_type
, Expression
* length
)
1997 element_type_(element_type
), length_(length
), length_tree_(NULL
)
2000 // Return the element type.
2002 element_type() const
2003 { return this->element_type_
; }
2005 // Return the length. This will return NULL for an open array.
2008 { return this->length_
; }
2010 // Whether this type is identical with T.
2012 is_identical(const Array_type
* t
) const;
2014 // Whether this type has any hidden fields.
2016 array_has_hidden_fields(const Named_type
* within
, std::string
* reason
) const
2017 { return this->element_type_
->has_hidden_fields(within
, reason
); }
2019 // Return a tree for the pointer to the values in an array.
2021 value_pointer_tree(Gogo
*, tree array
) const;
2023 // Return a tree for the length of an array with this type.
2025 length_tree(Gogo
*, tree array
);
2027 // Return a tree for the capacity of an array with this type.
2029 capacity_tree(Gogo
*, tree array
);
2031 // Import an array type.
2035 // Fill in the fields for a named slice type.
2037 fill_in_tree(Gogo
*, tree
);
2041 do_traverse(Traverse
* traverse
);
2047 do_has_pointer() const
2049 return this->length_
== NULL
|| this->element_type_
->has_pointer();
2053 do_hash_for_method(Gogo
*) const;
2056 do_check_make_expression(Expression_list
*, source_location
);
2062 do_get_init_tree(Gogo
*, tree
, bool);
2065 do_make_expression_tree(Translate_context
*, Expression_list
*,
2069 do_type_descriptor(Gogo
*, Named_type
*);
2072 do_reflection(Gogo
*, std::string
*) const;
2075 do_mangled_name(Gogo
*, std::string
*) const;
2078 do_export(Export
*) const;
2085 get_length_tree(Gogo
*);
2088 make_array_type_descriptor_type();
2091 make_slice_type_descriptor_type();
2094 array_type_descriptor(Gogo
*, Named_type
*);
2097 slice_type_descriptor(Gogo
*, Named_type
*);
2099 // The type of elements of the array.
2100 Type
* element_type_
;
2101 // The number of elements. This may be NULL.
2102 Expression
* length_
;
2103 // The length as a tree. We only want to compute this once.
2107 // The type of a map.
2109 class Map_type
: public Type
2112 Map_type(Type
* key_type
, Type
* val_type
, source_location location
)
2114 key_type_(key_type
), val_type_(val_type
), location_(location
)
2117 // Return the key type.
2120 { return this->key_type_
; }
2122 // Return the value type.
2125 { return this->val_type_
; }
2127 // Whether this type is identical with T.
2129 is_identical(const Map_type
* t
) const;
2131 // Import a map type.
2137 do_traverse(Traverse
*);
2143 do_has_pointer() const
2147 do_hash_for_method(Gogo
*) const;
2150 do_check_make_expression(Expression_list
*, source_location
);
2156 do_get_init_tree(Gogo
*, tree
, bool);
2159 do_make_expression_tree(Translate_context
*, Expression_list
*,
2163 do_type_descriptor(Gogo
*, Named_type
*);
2166 do_reflection(Gogo
*, std::string
*) const;
2169 do_mangled_name(Gogo
*, std::string
*) const;
2172 do_export(Export
*) const;
2176 make_map_type_descriptor_type();
2182 // Where the type was defined.
2183 source_location location_
;
2186 // The type of a channel.
2188 class Channel_type
: public Type
2191 Channel_type(bool may_send
, bool may_receive
, Type
* element_type
)
2192 : Type(TYPE_CHANNEL
),
2193 may_send_(may_send
), may_receive_(may_receive
),
2194 element_type_(element_type
)
2195 { gcc_assert(may_send
|| may_receive
); }
2197 // Whether this channel can send data.
2200 { return this->may_send_
; }
2202 // Whether this channel can receive data.
2205 { return this->may_receive_
; }
2207 // The type of the values that may be sent on this channel. This is
2208 // NULL if any type may be sent.
2210 element_type() const
2211 { return this->element_type_
; }
2213 // Whether this type is identical with T.
2215 is_identical(const Channel_type
* t
) const;
2217 // Import a channel type.
2218 static Channel_type
*
2223 do_traverse(Traverse
* traverse
)
2224 { return Type::traverse(this->element_type_
, traverse
); }
2227 do_has_pointer() const
2231 do_hash_for_method(Gogo
*) const;
2234 do_check_make_expression(Expression_list
*, source_location
);
2240 do_get_init_tree(Gogo
*, tree
, bool);
2243 do_make_expression_tree(Translate_context
*, Expression_list
*,
2247 do_type_descriptor(Gogo
*, Named_type
*);
2250 do_reflection(Gogo
*, std::string
*) const;
2253 do_mangled_name(Gogo
*, std::string
*) const;
2256 do_export(Export
*) const;
2260 make_chan_type_descriptor_type();
2262 // Whether this channel can send data.
2264 // Whether this channel can receive data.
2266 // The types of elements which may be sent on this channel. If this
2267 // is NULL, it means that any type may be sent.
2268 Type
* element_type_
;
2271 // An interface type.
2273 class Interface_type
: public Type
2276 Interface_type(Typed_identifier_list
* methods
, source_location location
)
2277 : Type(TYPE_INTERFACE
),
2278 methods_(methods
), location_(location
)
2279 { gcc_assert(methods
== NULL
|| !methods
->empty()); }
2281 // Return whether this is an empty interface.
2284 { return this->methods_
== NULL
; }
2286 // Return the list of methods. This will return NULL for an empty
2288 const Typed_identifier_list
*
2290 { return this->methods_
; }
2292 // Return the number of methods.
2294 method_count() const
2295 { return this->methods_
== NULL
? 0 : this->methods_
->size(); }
2297 // Return the method NAME, or NULL.
2298 const Typed_identifier
*
2299 find_method(const std::string
& name
) const;
2301 // Return the zero-based index of method NAME.
2303 method_index(const std::string
& name
) const;
2305 // Finalize the methods. This handles interface inheritance.
2309 // Return true if T implements this interface. If this returns
2310 // false, and REASON is not NULL, it sets *REASON to the reason that
2313 implements_interface(const Type
* t
, std::string
* reason
) const;
2315 // Whether this type is identical with T. REASON is as in
2316 // implements_interface.
2318 is_identical(const Interface_type
* t
) const;
2320 // Whether we can assign T to this type. is_identical is known to
2323 is_compatible_for_assign(const Interface_type
*, std::string
* reason
) const;
2325 // Return whether NAME is a method which is not exported. This is
2326 // only used for better error reporting.
2328 is_unexported_method(Gogo
*, const std::string
& name
) const;
2330 // Import an interface type.
2331 static Interface_type
*
2334 // Fill in the fields for a named interface type.
2336 fill_in_tree(Gogo
*, tree
);
2340 do_traverse(Traverse
*);
2343 do_has_pointer() const
2347 do_hash_for_method(Gogo
*) const;
2353 do_get_init_tree(Gogo
* gogo
, tree
, bool);
2356 do_type_descriptor(Gogo
*, Named_type
*);
2359 do_reflection(Gogo
*, std::string
*) const;
2362 do_mangled_name(Gogo
*, std::string
*) const;
2365 do_export(Export
*) const;
2369 make_interface_type_descriptor_type();
2371 // The list of methods associated with the interface. This will be
2372 // NULL for the empty interface.
2373 Typed_identifier_list
* methods_
;
2374 // The location where the interface was defined.
2375 source_location location_
;
2378 // The value we keep for a named type. This lets us get the right
2379 // name when we convert to trees. Note that we don't actually keep
2380 // the name here; the name is in the Named_object which points to
2381 // this. This object exists to hold a unique tree which represents
2384 class Named_type
: public Type
2387 Named_type(Named_object
* named_object
, Type
* type
, source_location location
)
2389 named_object_(named_object
), in_function_(NULL
), type_(type
),
2390 local_methods_(NULL
), all_methods_(NULL
),
2391 interface_method_tables_(NULL
), pointer_interface_method_tables_(NULL
),
2392 location_(location
), named_tree_(NULL
), is_visible_(true),
2393 is_error_(false), seen_(false)
2396 // Return the associated Named_object. This holds the actual name.
2399 { return this->named_object_
; }
2402 named_object() const
2403 { return this->named_object_
; }
2405 // Set the Named_object. This is used when we see a type
2406 // declaration followed by a type.
2408 set_named_object(Named_object
* no
)
2409 { this->named_object_
= no
; }
2411 // Return the function in which this type is defined. This will
2412 // return NULL for a type defined in global scope.
2415 { return this->in_function_
; }
2417 // Set the function in which this type is defined.
2419 set_in_function(Named_object
* f
)
2420 { this->in_function_
= f
; }
2422 // Return the name of the type.
2426 // Return the name of the type for an error message. The difference
2427 // is that if the type is defined in a different package, this will
2428 // return PACKAGE.NAME.
2430 message_name() const;
2432 // Return the underlying type.
2435 { return this->type_
; }
2439 { return this->type_
; }
2441 // Return the location.
2444 { return this->location_
; }
2446 // Whether this type is visible. This only matters when parsing.
2449 { return this->is_visible_
; }
2451 // Mark this type as visible.
2454 { this->is_visible_
= true; }
2456 // Mark this type as invisible.
2459 { this->is_visible_
= false; }
2461 // Whether this is a builtin type.
2464 { return this->location_
== BUILTINS_LOCATION
; }
2466 // Return the base type for this type.
2473 // Return whether this is an error type.
2475 is_named_error_type() const;
2477 // Add a method to this type.
2479 add_method(const std::string
& name
, Function
*);
2481 // Add a method declaration to this type.
2483 add_method_declaration(const std::string
& name
, Package
* package
,
2484 Function_type
* type
, source_location location
);
2486 // Add an existing method--one defined before the type itself was
2487 // defined--to a type.
2489 add_existing_method(Named_object
*);
2491 // Look up a local method.
2493 find_local_method(const std::string
& name
) const;
2495 // Return the list of local methods.
2497 local_methods() const
2498 { return this->local_methods_
; }
2500 // Build the complete list of methods, including those from
2501 // anonymous fields, and build method stubs if needed.
2503 finalize_methods(Gogo
*);
2505 // Return whether this type has any methods. This should only be
2506 // called after the finalize_methods pass.
2508 has_any_methods() const
2509 { return this->all_methods_
!= NULL
; }
2511 // Return the methods for this type. This should only be called
2512 // after the finalized_methods pass.
2515 { return this->all_methods_
; }
2517 // Return the method to use for NAME. This returns NULL if there is
2518 // no such method or if the method is ambiguous. When it returns
2519 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
2521 method_function(const std::string
& name
, bool *is_ambiguous
) const;
2523 // Return whether NAME is a known field or method which is not
2524 // exported. This is only used for better error reporting.
2526 is_unexported_local_method(Gogo
*, const std::string
& name
) const;
2528 // Return a pointer to the interface method table for this type for
2529 // the interface INTERFACE. If IS_POINTER is true, set the type
2530 // descriptor to a pointer to this type, otherwise set it to this
2533 interface_method_table(Gogo
*, const Interface_type
* interface
,
2536 // Whether this type has any hidden fields.
2538 named_type_has_hidden_fields(std::string
* reason
) const;
2542 export_named_type(Export
*, const std::string
& name
) const;
2544 // Import a named type.
2546 import_named_type(Import
*, Named_type
**);
2550 do_traverse(Traverse
* traverse
)
2551 { return Type::traverse(this->type_
, traverse
); }
2557 do_has_pointer() const
2558 { return this->type_
->has_pointer(); }
2561 do_hash_for_method(Gogo
*) const;
2564 do_check_make_expression(Expression_list
* args
, source_location location
)
2565 { return this->type_
->check_make_expression(args
, location
); }
2571 do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
2572 { return this->type_
->get_typed_init_tree(gogo
, type_tree
, is_clear
); }
2575 do_make_expression_tree(Translate_context
* context
, Expression_list
* args
,
2576 source_location location
)
2577 { return this->type_
->make_expression_tree(context
, args
, location
); }
2580 do_type_descriptor(Gogo
*, Named_type
*);
2583 do_reflection(Gogo
*, std::string
*) const;
2586 do_mangled_name(Gogo
*, std::string
* ret
) const;
2589 do_export(Export
*) const;
2592 // A mapping from interfaces to the associated interface method
2593 // tables for this type. This maps to a decl.
2594 typedef Unordered_map_hash(const Interface_type
*, tree
, Type_hash_identical
,
2595 Type_identical
) Interface_method_tables
;
2597 // A pointer back to the Named_object for this type.
2598 Named_object
* named_object_
;
2599 // If this type is defined in a function, a pointer back to the
2600 // function in which it is defined.
2601 Named_object
* in_function_
;
2604 // The list of methods defined for this type. Any named type can
2606 Bindings
* local_methods_
;
2607 // The full list of methods for this type, including methods
2608 // declared for anonymous fields.
2609 Methods
* all_methods_
;
2610 // A mapping from interfaces to the associated interface method
2611 // tables for this type.
2612 Interface_method_tables
* interface_method_tables_
;
2613 // A mapping from interfaces to the associated interface method
2614 // tables for pointers to this type.
2615 Interface_method_tables
* pointer_interface_method_tables_
;
2616 // The location where this type was defined.
2617 source_location location_
;
2618 // The tree for this type while converting to GENERIC. This is used
2619 // to avoid endless recursion when a named type refers to itself.
2621 // Whether this type is visible. This is false if this type was
2622 // created because it was referenced by an imported object, but the
2623 // type itself was not exported. This will always be true for types
2624 // created in the current package.
2626 // Whether this type is erroneous.
2628 // In a recursive operation such as has_hidden_fields, this flag is
2629 // used to prevent infinite recursion when a type refers to itself.
2630 // This is mutable because it is always reset to false when the
2635 // A forward declaration. This handles a type which has been declared
2638 class Forward_declaration_type
: public Type
2641 Forward_declaration_type(Named_object
* named_object
);
2643 // The named object associated with this type declaration. This
2644 // will be resolved.
2649 named_object() const;
2651 // Return the name of the type.
2655 // Return the type to which this points. Give an error if the type
2656 // has not yet been defined.
2663 // Whether the base type has been defined.
2667 // Add a method to this type.
2669 add_method(const std::string
& name
, Function
*);
2671 // Add a method declaration to this type.
2673 add_method_declaration(const std::string
& name
, Function_type
*,
2678 do_traverse(Traverse
* traverse
);
2681 do_has_pointer() const
2682 { return this->base()->has_pointer(); }
2685 do_hash_for_method(Gogo
* gogo
) const
2686 { return this->real_type()->hash_for_method(gogo
); }
2689 do_check_make_expression(Expression_list
* args
, source_location location
)
2690 { return this->base()->check_make_expression(args
, location
); }
2693 do_get_tree(Gogo
* gogo
);
2696 do_get_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
2697 { return this->base()->get_typed_init_tree(gogo
, type_tree
, is_clear
); }
2700 do_make_expression_tree(Translate_context
* context
, Expression_list
* args
,
2701 source_location location
)
2702 { return this->base()->make_expression_tree(context
, args
, location
); }
2705 do_type_descriptor(Gogo
*, Named_type
*);
2708 do_reflection(Gogo
*, std::string
*) const;
2711 do_mangled_name(Gogo
*, std::string
* ret
) const;
2714 do_export(Export
*) const;
2717 // Issue a warning about a use of an undefined type.
2721 // The type declaration.
2722 Named_object
* named_object_
;
2723 // Whether we have issued a warning about this type.
2724 mutable bool warned_
;
2727 // The Type_context struct describes what we expect for the type of an
2732 // The exact type we expect, if known. This may be NULL.
2734 // Whether an abstract type is permitted.
2735 bool may_be_abstract
;
2739 : type(NULL
), may_be_abstract(false)
2742 Type_context(Type
* a_type
, bool a_may_be_abstract
)
2743 : type(a_type
), may_be_abstract(a_may_be_abstract
)
2747 #endif // !defined(GO_TYPES_H)