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 ERRORS_ARE_IDENTICAL,
507 // returns that an erroneous type is identical to any other type;
508 // this is used to avoid cascading errors. If this returns false,
509 // and REASON is not NULL, it may set *REASON.
511 are_identical(const Type* lhs, const Type* rhs, bool errors_are_identical,
512 std::string* reason);
514 // Return true if two types are compatible for use in a binary
515 // operation, other than a shift, comparison, or channel send. This
516 // is an equivalence relation.
518 are_compatible_for_binop(const Type* t1, const Type* t2);
520 // Return true if a value with type RHS is assignable to a variable
521 // with type LHS. This is not an equivalence relation. If this
522 // returns false, and REASON is not NULL, it sets *REASON.
524 are_assignable(const Type* lhs, const Type* rhs, std::string* reason);
526 // Return true if a value with type RHS may be converted to type
527 // LHS. If this returns false, and REASON is not NULL, it sets
530 are_convertible(const Type* lhs, const Type* rhs, std::string* reason);
532 // Whether this type has any hidden fields which are not visible in
533 // the current compilation, such as a field whose name begins with a
534 // lower case letter in a struct imported from a different package.
535 // WITHIN is not NULL if we are looking at fields in a named type.
537 has_hidden_fields(const Named_type* within, std::string* reason) const;
539 // Return a hash code for this type for the method hash table.
540 // Types which are equivalent according to are_identical will have
541 // the same hash code.
543 hash_for_method(Gogo*) const;
545 // Return the type classification.
547 classification() const
548 { return this->classification_; }
550 // Return the base type for this type. This looks through forward
551 // declarations and names. Using this with a forward declaration
552 // which has not been defined will return an error type.
559 // Return the type skipping defined forward declarations. If this
560 // type is a forward declaration which has not been defined, it will
561 // return the Forward_declaration_type. This differs from base() in
562 // that it will return a Named_type, and for a
563 // Forward_declaration_type which is not defined it will return that
564 // type rather than an error type.
571 // Return true if this is a basic type: a type which is not composed
572 // of other types, and is not void.
574 is_basic_type() const;
576 // Return true if this is an abstract type--an integer, floating
577 // point, or complex type whose size has not been determined.
581 // Return a non-abstract version of an abstract type.
583 make_non_abstract_type();
585 // Return true if this type is or contains a pointer. This
586 // determines whether the garbage collector needs to look at a value
590 { return this->do_has_pointer(); }
592 // Return true if this is an error type. An error type indicates a
595 is_error_type() const;
597 // Return true if this is a void type.
600 { return this->classification_ == TYPE_VOID; }
602 // If this is an integer type, return the Integer_type. Otherwise,
603 // return NULL. This is a controlled dynamic_cast.
606 { return this->convert<Integer_type, TYPE_INTEGER>(); }
610 { return this->convert<const Integer_type, TYPE_INTEGER>(); }
612 // If this is a floating point type, return the Float_type.
613 // Otherwise, return NULL. This is a controlled dynamic_cast.
616 { return this->convert<Float_type, TYPE_FLOAT>(); }
620 { return this->convert<const Float_type, TYPE_FLOAT>(); }
622 // If this is a complex type, return the Complex_type. Otherwise,
626 { return this->convert<Complex_type, TYPE_COMPLEX>(); }
630 { return this->convert<const Complex_type, TYPE_COMPLEX>(); }
632 // Return true if this is a boolean type.
634 is_boolean_type() const
635 { return this->base()->classification_ == TYPE_BOOLEAN; }
637 // Return true if this is an abstract boolean type.
639 is_abstract_boolean_type() const
640 { return this->classification_ == TYPE_BOOLEAN; }
642 // Return true if this is a string type.
644 is_string_type() const
645 { return this->base()->classification_ == TYPE_STRING; }
647 // Return true if this is an abstract string type.
649 is_abstract_string_type() const
650 { return this->classification_ == TYPE_STRING; }
652 // Return true if this is the sink type. This is the type of the
653 // blank identifier _.
656 { return this->base()->classification_ == TYPE_SINK; }
658 // If this is a function type, return it. Otherwise, return NULL.
661 { return this->convert<Function_type, TYPE_FUNCTION>(); }
664 function_type() const
665 { return this->convert<const Function_type, TYPE_FUNCTION>(); }
667 // If this is a pointer type, return the type to which it points.
668 // Otherwise, return NULL.
672 // If this is a pointer type, return the type to which it points.
673 // Otherwise, return the type itself.
677 Type* pt = this->points_to();
678 return pt != NULL ? pt : this;
684 const Type* pt = this->points_to();
685 return pt != NULL ? pt : this;
688 // Return true if this is the nil type. We don't use base() here,
689 // because this can be called during parse, and there is no way to
690 // name the nil type anyhow.
693 { return this->classification_ == TYPE_NIL; }
695 // Return true if this is the predeclared constant nil being used as
696 // a type. This is what the parser produces for type switches which
699 is_nil_constant_as_type() const;
701 // Return true if this is the return type of a function which
702 // returns multiple values.
704 is_call_multiple_result_type() const
705 { return this->base()->classification_ == TYPE_CALL_MULTIPLE_RESULT; }
707 // If this is a struct type, return it. Otherwise, return NULL.
710 { return this->convert<Struct_type, TYPE_STRUCT>(); }
714 { return this->convert<const Struct_type, TYPE_STRUCT>(); }
716 // If this is an array type, return it. Otherwise, return NULL.
719 { return this->convert<Array_type, TYPE_ARRAY>(); }
723 { return this->convert<const Array_type, TYPE_ARRAY>(); }
725 // Return whether if this is an open array type.
727 is_open_array_type() const;
729 // If this is a map type, return it. Otherwise, return NULL.
732 { return this->convert<Map_type, TYPE_MAP>(); }
736 { return this->convert<const Map_type, TYPE_MAP>(); }
738 // If this is a channel type, return it. Otherwise, return NULL.
741 { return this->convert<Channel_type, TYPE_CHANNEL>(); }
745 { return this->convert<const Channel_type, TYPE_CHANNEL>(); }
747 // If this is an interface type, return it. Otherwise, return NULL.
750 { return this->convert<Interface_type, TYPE_INTERFACE>(); }
752 const Interface_type*
753 interface_type() const
754 { return this->convert<const Interface_type, TYPE_INTERFACE>(); }
756 // If this is a named type, return it. Otherwise, return NULL.
763 // If this is a forward declaration, return it. Otherwise, return
765 Forward_declaration_type*
766 forward_declaration_type()
767 { return this->convert_no_base<Forward_declaration_type, TYPE_FORWARD>(); }
769 const Forward_declaration_type*
770 forward_declaration_type() const
772 return this->convert_no_base<const Forward_declaration_type,
776 // Return true if this type is not yet defined.
778 is_undefined() const;
780 // Return true if this is the unsafe.pointer type. We currently
781 // represent that as pointer-to-void.
783 is_unsafe_pointer_type() const
784 { return this->points_to() != NULL && this->points_to()->is_void_type(); }
786 // Look for field or method NAME for TYPE. Return an expression for
787 // it, bound to EXPR.
789 bind_field_or_method(Gogo*, const Type* type, Expression* expr,
790 const std::string& name, source_location);
792 // Return true if NAME is an unexported field or method of TYPE.
794 is_unexported_field_or_method(Gogo*, const Type*, const std::string&,
795 std::vector<const Named_type*>*);
797 // This type was passed to the builtin function make. ARGS are the
798 // arguments passed to make after the type; this may be NULL if
799 // there were none. Issue any required errors.
801 check_make_expression(Expression_list* args, source_location location)
802 { return this->do_check_make_expression(args, location); }
804 // Return a tree representing this type.
808 // Return a tree representing a zero initialization for this type.
809 // This will be something like an INTEGER_CST or a CONSTRUCTOR. If
810 // IS_CLEAR is true, then the memory is known to be zeroed; in that
811 // case, this will return NULL if there is nothing to be done.
813 get_init_tree(Gogo*, bool is_clear);
815 // Like get_init_tree, but passing in the type to use for the
818 get_typed_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
819 { return this->do_get_init_tree(gogo, type_tree, is_clear); }
821 // Return a tree for a make expression applied to this type.
823 make_expression_tree(Translate_context* context, Expression_list* args,
824 source_location location)
825 { return this->do_make_expression_tree(context, args, location); }
827 // Build a type descriptor entry for this type. Return a pointer to
830 type_descriptor_pointer(Gogo* gogo);
832 // Return the type reflection string for this type.
834 reflection(Gogo*) const;
836 // Return a mangled name for the type. This is a name which can be
837 // used in assembler code. Identical types should have the same
840 mangled_name(Gogo*) const;
844 export_type(Export* exp) const
845 { this->do_export(exp); }
849 import_type(Import*);
852 Type(Type_classification);
854 // Functions implemented by the child class.
856 // Traverse the subtypes.
858 do_traverse(Traverse*);
866 do_has_pointer() const
870 do_hash_for_method(Gogo*) const;
873 do_check_make_expression(Expression_list* args, source_location);
877 do_get_tree(Gogo*) = 0;
880 do_get_init_tree(Gogo*, tree, bool) = 0;
883 do_make_expression_tree(Translate_context*, Expression_list*,
887 do_type_descriptor(Gogo*, Named_type* name) = 0;
890 do_reflection(Gogo*, std::string*) const = 0;
894 do_mangled_name(Gogo*, std::string*) const = 0;
897 do_export(Export*) const;
899 // Return whether an expression is an integer.
901 check_int_value(Expression*, const char*, source_location);
903 // Return whether a method expects a pointer as the receiver.
905 method_expects_pointer(const Named_object*);
907 // Finalize the methods for a type.
909 finalize_methods(Gogo*, const Type*, source_location, Methods**);
911 // Return a method from a set of methods.
913 method_function(const Methods*, const std::string& name,
916 // Return a composite literal for the type descriptor entry for a
919 type_descriptor(Gogo*, Type*);
921 // Return a composite literal for the type descriptor entry for
922 // TYPE, using NAME as the name of the type.
924 named_type_descriptor(Gogo*, Type* type, Named_type* name);
926 // Return a composite literal for a plain type descriptor for this
927 // type with the given kind and name.
929 plain_type_descriptor(Gogo*, int runtime_type_kind, Named_type* name);
931 // Build a composite literal for the basic type descriptor.
933 type_descriptor_constructor(Gogo*, int runtime_type_kind, Named_type*,
934 const Methods*, bool only_value_methods);
936 // Make a builtin struct type from a list of fields.
938 make_builtin_struct_type(int nfields, ...);
940 // Make a builtin named type.
942 make_builtin_named_type(const char* name, Type* type);
944 // For the benefit of child class reflection string generation.
946 append_reflection(const Type* type, Gogo* gogo, std::string* ret) const
947 { type->do_reflection(gogo, ret); }
949 // For the benefit of child class mangling.
951 append_mangled_name(const Type* type, Gogo* gogo, std::string* ret) const
952 { type->do_mangled_name(gogo, ret); }
954 // Incorporate a string into a hash code.
956 hash_string(const std::string&, unsigned int);
958 // Return a tree for the underlying type of a named type.
960 get_named_type_tree(Gogo* gogo, Type* base_type)
961 { return base_type->get_tree_without_hash(gogo); }
964 // Convert to the desired type classification, or return NULL. This
965 // is a controlled dynamic_cast.
966 template<typename Type_class, Type_classification type_classification>
970 Type* base = this->base();
971 return (base->classification_ == type_classification
972 ? static_cast<Type_class*>(base)
976 template<typename Type_class, Type_classification type_classification>
980 const Type* base = this->base();
981 return (base->classification_ == type_classification
982 ? static_cast<Type_class*>(base)
986 template<typename Type_class, Type_classification type_classification>
990 return (this->classification_ == type_classification
991 ? static_cast<Type_class*>(this)
995 template<typename Type_class, Type_classification type_classification>
997 convert_no_base() const
999 return (this->classification_ == type_classification
1000 ? static_cast<Type_class*>(this)
1004 // Get the hash and equality functions for a type.
1006 type_functions(const char** hash_fn, const char** equal_fn) const;
1008 // Build a composite literal for the uncommon type information.
1010 uncommon_type_constructor(Gogo*, Type* uncommon_type,
1011 Named_type*, const Methods*,
1012 bool only_value_methods) const;
1014 // Build a composite literal for the methods.
1016 methods_constructor(Gogo*, Type* methods_type, const Methods*,
1017 bool only_value_methods) const;
1019 // Build a composite literal for one method.
1021 method_constructor(Gogo*, Type* method_type, const std::string& name,
1022 const Method*) const;
1025 build_receive_return_type(tree type);
1027 // A hash table we use to avoid infinite recursion.
1028 typedef Unordered_set_hash(const Named_type*, Type_hash_identical,
1029 Type_identical) Types_seen;
1031 // Add all methods for TYPE to the list of methods for THIS.
1033 add_methods_for_type(const Type* type, const Method::Field_indexes*,
1034 unsigned int depth, bool, bool, Types_seen*,
1038 add_local_methods_for_type(const Named_type* type,
1039 const Method::Field_indexes*,
1040 unsigned int depth, bool, bool, Methods**);
1043 add_embedded_methods_for_type(const Type* type,
1044 const Method::Field_indexes*,
1045 unsigned int depth, bool, bool, Types_seen*,
1049 add_interface_methods_for_type(const Type* type,
1050 const Method::Field_indexes*,
1051 unsigned int depth, Methods**);
1053 // Build stub methods for a type.
1055 build_stub_methods(Gogo*, const Type* type, const Methods* methods,
1059 build_one_stub_method(Gogo*, Method*, const char* receiver_name,
1060 const Typed_identifier_list*, bool is_varargs,
1064 apply_field_indexes(Expression*, const Method::Field_indexes*,
1067 // Look for a field or method named NAME in TYPE.
1069 find_field_or_method(const Type* type, const std::string& name,
1070 bool receiver_can_be_pointer,
1071 std::vector<const Named_type*>*, int* level,
1072 bool* is_method, bool* found_pointer_method,
1073 std::string* ambig1, std::string* ambig2);
1075 // Get a tree for a type without looking in the hash table for
1078 get_tree_without_hash(Gogo*);
1080 // A mapping from Type to tree, used to ensure that the GIMPLE
1081 // representation of identical types is identical.
1082 typedef Unordered_map_hash(const Type*, tree, Type_hash_identical,
1083 Type_identical) Type_trees;
1085 static Type_trees type_trees;
1087 // The type classification.
1088 Type_classification classification_;
1089 // The tree representation of the type, once it has been determined.
1091 // The decl for the type descriptor for this type. This starts out
1092 // as NULL and is filled in as needed.
1093 tree type_descriptor_decl_;
1096 // Type hash table operations.
1098 class Type_hash_identical
1102 operator()(const Type* type) const
1103 { return type->hash_for_method(NULL); }
1106 class Type_identical
1110 operator()(const Type* t1, const Type* t2) const
1111 { return Type::are_identical(t1, t2, false, NULL); }
1114 // An identifier with a type.
1116 class Typed_identifier
1119 Typed_identifier(const std::string& name, Type* type,
1120 source_location location)
1121 : name_(name), type_(type), location_(location)
1127 { return this->name_; }
1132 { return this->type_; }
1134 // Return the location where the name was seen. This is not always
1138 { return this->location_; }
1140 // Set the type--sometimes we see the identifier before the type.
1142 set_type(Type* type)
1144 gcc_assert(this->type_ == NULL || type->is_error_type());
1153 // The location where the name was seen.
1154 source_location location_;
1157 // A list of Typed_identifiers.
1159 class Typed_identifier_list
1162 Typed_identifier_list()
1166 // Whether the list is empty.
1169 { return this->entries_.empty(); }
1171 // Return the number of entries in the list.
1174 { return this->entries_.size(); }
1176 // Add an entry to the end of the list.
1178 push_back(const Typed_identifier& td)
1179 { this->entries_.push_back(td); }
1181 // Remove an entry from the end of the list.
1184 { this->entries_.pop_back(); }
1186 // Set the type of entry I to TYPE.
1188 set_type(size_t i, Type* type)
1190 gcc_assert(i < this->entries_.size());
1191 this->entries_[i].set_type(type);
1194 // Sort the entries by name.
1200 traverse(Traverse*);
1202 // Return the first and last elements.
1205 { return this->entries_.front(); }
1207 const Typed_identifier&
1209 { return this->entries_.front(); }
1213 { return this->entries_.back(); }
1215 const Typed_identifier&
1217 { return this->entries_.back(); }
1219 const Typed_identifier&
1221 { return this->entries_.at(i); }
1224 set(size_t i, const Typed_identifier& t)
1225 { this->entries_.at(i) = t; }
1230 gcc_assert(c <= this->entries_.size());
1231 this->entries_.resize(c, Typed_identifier("", NULL, UNKNOWN_LOCATION));
1236 typedef std::vector<Typed_identifier>::iterator iterator;
1237 typedef std::vector<Typed_identifier>::const_iterator const_iterator;
1241 { return this->entries_.begin(); }
1245 { return this->entries_.begin(); }
1249 { return this->entries_.end(); }
1253 { return this->entries_.end(); }
1255 // Return a copy of this list. This returns an independent copy of
1256 // the vector, but does not copy the types.
1257 Typed_identifier_list*
1261 std::vector<Typed_identifier> entries_;
1264 // The type of an integer.
1266 class Integer_type : public Type
1269 // Create a new integer type.
1271 create_integer_type(const char* name, bool is_unsigned, int bits,
1272 int runtime_type_kind);
1274 // Look up an existing integer type.
1276 lookup_integer_type(const char* name);
1278 // Create an abstract integer type.
1279 static Integer_type*
1280 create_abstract_integer_type();
1282 // Whether this is an abstract integer type.
1285 { return this->is_abstract_; }
1287 // Whether this is an unsigned type.
1290 { return this->is_unsigned_; }
1292 // The number of bits.
1295 { return this->bits_; }
1297 // Whether this type is the same as T.
1299 is_identical(const Integer_type* t) const;
1303 do_hash_for_method(Gogo*) const;
1309 do_get_init_tree(Gogo*, tree, bool);
1312 do_type_descriptor(Gogo*, Named_type*);
1315 do_reflection(Gogo*, std::string*) const;
1318 do_mangled_name(Gogo*, std::string*) const;
1321 Integer_type(bool is_abstract, bool is_unsigned, int bits,
1322 int runtime_type_kind)
1323 : Type(TYPE_INTEGER),
1324 is_abstract_(is_abstract), is_unsigned_(is_unsigned), bits_(bits),
1325 runtime_type_kind_(runtime_type_kind)
1328 // Map names of integer types to the types themselves.
1329 typedef std::map<std::string, Named_type*> Named_integer_types;
1330 static Named_integer_types named_integer_types;
1332 // True if this is an abstract type.
1334 // True if this is an unsigned type.
1336 // The number of bits.
1338 // The runtime type code used in the type descriptor for this type.
1339 int runtime_type_kind_;
1342 // The type of a floating point number.
1344 class Float_type : public Type
1347 // Create a new float type.
1349 create_float_type(const char* name, int bits, int runtime_type_kind);
1351 // Look up an existing float type.
1353 lookup_float_type(const char* name);
1355 // Create an abstract float type.
1357 create_abstract_float_type();
1359 // Whether this is an abstract float type.
1362 { return this->is_abstract_; }
1364 // The number of bits.
1367 { return this->bits_; }
1369 // Whether this type is the same as T.
1371 is_identical(const Float_type* t) const;
1373 // Return a tree for this type without using a Gogo*.
1379 do_hash_for_method(Gogo*) const;
1385 do_get_init_tree(Gogo*, tree, bool);
1388 do_type_descriptor(Gogo*, Named_type*);
1391 do_reflection(Gogo*, std::string*) const;
1394 do_mangled_name(Gogo*, std::string*) const;
1397 Float_type(bool is_abstract, int bits, int runtime_type_kind)
1399 is_abstract_(is_abstract), bits_(bits),
1400 runtime_type_kind_(runtime_type_kind)
1403 // Map names of float types to the types themselves.
1404 typedef std::map<std::string, Named_type*> Named_float_types;
1405 static Named_float_types named_float_types;
1407 // True if this is an abstract type.
1409 // The number of bits in the floating point value.
1411 // The runtime type code used in the type descriptor for this type.
1412 int runtime_type_kind_;
1415 // The type of a complex number.
1417 class Complex_type : public Type
1420 // Create a new complex type.
1422 create_complex_type(const char* name, int bits, int runtime_type_kind);
1424 // Look up an existing complex type.
1426 lookup_complex_type(const char* name);
1428 // Create an abstract complex type.
1429 static Complex_type*
1430 create_abstract_complex_type();
1432 // Whether this is an abstract complex type.
1435 { return this->is_abstract_; }
1437 // The number of bits: 64 or 128.
1439 { return this->bits_; }
1441 // Whether this type is the same as T.
1443 is_identical(const Complex_type* t) const;
1445 // Return a tree for this type without using a Gogo*.
1451 do_hash_for_method(Gogo*) const;
1457 do_get_init_tree(Gogo*, tree, bool);
1460 do_type_descriptor(Gogo*, Named_type*);
1463 do_reflection(Gogo*, std::string*) const;
1466 do_mangled_name(Gogo*, std::string*) const;
1469 Complex_type(bool is_abstract, int bits, int runtime_type_kind)
1470 : Type(TYPE_COMPLEX),
1471 is_abstract_(is_abstract), bits_(bits),
1472 runtime_type_kind_(runtime_type_kind)
1475 // Map names of complex types to the types themselves.
1476 typedef std::map<std::string, Named_type*> Named_complex_types;
1477 static Named_complex_types named_complex_types;
1479 // True if this is an abstract type.
1481 // The number of bits in the complex value--64 or 128.
1483 // The runtime type code used in the type descriptor for this type.
1484 int runtime_type_kind_;
1487 // The type of a string.
1489 class String_type : public Type
1496 // Return a tree for the length of STRING.
1498 length_tree(Gogo*, tree string);
1500 // Return a tree which points to the bytes of STRING.
1502 bytes_tree(Gogo*, tree string);
1506 do_has_pointer() const
1513 do_get_init_tree(Gogo* gogo, tree, bool);
1516 do_type_descriptor(Gogo*, Named_type*);
1519 do_reflection(Gogo*, std::string*) const;
1522 do_mangled_name(Gogo*, std::string* ret) const;
1525 // The named string type.
1526 static Named_type* string_type_;
1529 // The type of a function.
1531 class Function_type : public Type
1534 Function_type(Typed_identifier* receiver, Typed_identifier_list* parameters,
1535 Typed_identifier_list* results, source_location location)
1536 : Type(TYPE_FUNCTION),
1537 receiver_(receiver), parameters_(parameters), results_(results),
1538 location_(location), is_varargs_(false), is_builtin_(false)
1541 // Get the receiver.
1542 const Typed_identifier*
1544 { return this->receiver_; }
1546 // Get the return names and types.
1547 const Typed_identifier_list*
1549 { return this->results_; }
1551 // Get the parameter names and types.
1552 const Typed_identifier_list*
1554 { return this->parameters_; }
1556 // Whether this is a varargs function.
1559 { return this->is_varargs_; }
1561 // Whether this is a builtin function.
1564 { return this->is_builtin_; }
1566 // The location where this type was defined.
1569 { return this->location_; }
1571 // Return whether this is a method type.
1574 { return this->receiver_ != NULL; }
1576 // Whether T is a valid redeclaration of this type. This is called
1577 // when a function is declared more than once.
1579 is_valid_redeclaration(const Function_type* t, std::string*) const;
1581 // Whether this type is the same as T.
1583 is_identical(const Function_type* t, bool ignore_receiver,
1584 bool errors_are_identical, std::string*) const;
1586 // Record that this is a varargs function.
1589 { this->is_varargs_ = true; }
1591 // Record that this is a builtin function.
1594 { this->is_builtin_ = true; }
1596 // Import a function type.
1597 static Function_type*
1600 // Return a copy of this type without a receiver. This is only
1601 // valid for a method type.
1603 copy_without_receiver() const;
1605 // Return a copy of this type with a receiver. This is used when an
1606 // interface method is attached to a named or struct type.
1608 copy_with_receiver(Type*) const;
1612 do_traverse(Traverse*);
1614 // A trampoline function has a pointer which matters for GC.
1616 do_has_pointer() const
1620 do_hash_for_method(Gogo*) const;
1626 do_get_init_tree(Gogo*, tree, bool);
1629 do_type_descriptor(Gogo*, Named_type*);
1632 do_reflection(Gogo*, std::string*) const;
1635 do_mangled_name(Gogo*, std::string*) const;
1638 do_export(Export*) const;
1642 make_function_type_descriptor_type();
1645 type_descriptor_params(Type*, const Typed_identifier*,
1646 const Typed_identifier_list*);
1648 // The receiver name and type. This will be NULL for a normal
1649 // function, non-NULL for a method.
1650 Typed_identifier* receiver_;
1651 // The parameter names and types.
1652 Typed_identifier_list* parameters_;
1653 // The result names and types. This will be NULL if no result was
1655 Typed_identifier_list* results_;
1656 // The location where this type was defined. This exists solely to
1657 // give a location for the fields of the struct if this function
1658 // returns multiple values.
1659 source_location location_;
1660 // Whether this function takes a variable number of arguments.
1662 // Whether this is a special builtin function which can not simply
1663 // be called. This is used for len, cap, etc.
1667 // The type of a pointer.
1669 class Pointer_type : public Type
1672 Pointer_type(Type* to_type)
1673 : Type(TYPE_POINTER),
1679 { return this->to_type_; }
1681 // Import a pointer type.
1682 static Pointer_type*
1687 do_traverse(Traverse*);
1690 do_has_pointer() const
1694 do_hash_for_method(Gogo*) const;
1700 do_get_init_tree(Gogo*, tree, bool);
1703 do_type_descriptor(Gogo*, Named_type*);
1706 do_reflection(Gogo*, std::string*) const;
1709 do_mangled_name(Gogo*, std::string*) const;
1712 do_export(Export*) const;
1716 make_pointer_type_descriptor_type();
1718 // The type to which this type points.
1722 // The type of a field in a struct.
1727 explicit Struct_field(const Typed_identifier& typed_identifier)
1728 : typed_identifier_(typed_identifier), tag_(NULL)
1738 { return this->typed_identifier_.type(); }
1740 // The field location.
1743 { return this->typed_identifier_.location(); }
1745 // Whether the field has a tag.
1748 { return this->tag_ != NULL; }
1754 gcc_assert(this->tag_ != NULL);
1758 // Whether this is an anonymous field.
1760 is_anonymous() const
1761 { return this->typed_identifier_.name().empty(); }
1763 // Set the tag. FIXME: This is never freed.
1765 set_tag(const std::string& tag)
1766 { this->tag_ = new std::string(tag); }
1768 // Set the type. This is only used in error cases.
1770 set_type(Type* type)
1771 { this->typed_identifier_.set_type(type); }
1774 // The field name, type, and location.
1775 Typed_identifier typed_identifier_;
1776 // The field tag. This is NULL if the field has no tag.
1780 // A list of struct fields.
1782 class Struct_field_list
1789 // Whether the list is empty.
1792 { return this->entries_.empty(); }
1794 // Return the number of entries.
1797 { return this->entries_.size(); }
1799 // Add an entry to the end of the list.
1801 push_back(const Struct_field& sf)
1802 { this->entries_.push_back(sf); }
1804 // Index into the list.
1807 { return this->entries_.at(i); }
1809 // Last entry in list.
1812 { return this->entries_.back(); }
1816 typedef std::vector<Struct_field>::iterator iterator;
1817 typedef std::vector<Struct_field>::const_iterator const_iterator;
1821 { return this->entries_.begin(); }
1825 { return this->entries_.begin(); }
1829 { return this->entries_.end(); }
1833 { return this->entries_.end(); }
1836 std::vector<Struct_field> entries_;
1839 // The type of a struct.
1841 class Struct_type : public Type
1844 Struct_type(Struct_field_list* fields, source_location location)
1845 : Type(TYPE_STRUCT),
1846 fields_(fields), location_(location), all_methods_(NULL)
1849 // Return the field NAME. This only looks at local fields, not at
1850 // embedded types. If the field is found, and PINDEX is not NULL,
1851 // this sets *PINDEX to the field index. If the field is not found,
1852 // this returns NULL.
1854 find_local_field(const std::string& name, unsigned int *pindex) const;
1856 // Return the field number INDEX.
1858 field(unsigned int index) const
1859 { return &this->fields_->at(index); }
1861 // Get the struct fields.
1862 const Struct_field_list*
1864 { return this->fields_; }
1866 // Return the number of fields.
1869 { return this->fields_->size(); }
1871 // Push a new field onto the end of the struct. This is used when
1872 // building a closure variable.
1874 push_field(const Struct_field& sf)
1875 { this->fields_->push_back(sf); }
1877 // Return an expression referring to field NAME in STRUCT_EXPR, or
1878 // NULL if there is no field with that name.
1879 Field_reference_expression*
1880 field_reference(Expression* struct_expr, const std::string& name,
1881 source_location) const;
1883 // Return the total number of fields, including embedded fields.
1884 // This is the number of values which can appear in a conversion to
1887 total_field_count() const;
1889 // Whether this type is identical with T.
1891 is_identical(const Struct_type* t, bool errors_are_identical) const;
1893 // Whether this struct type has any hidden fields. This returns
1894 // true if any fields have hidden names, or if any non-pointer
1895 // anonymous fields have types with hidden fields.
1897 struct_has_hidden_fields(const Named_type* within, std::string*) const;
1899 // Return whether NAME is a local field which is not exported. This
1900 // is only used for better error reporting.
1902 is_unexported_local_field(Gogo*, const std::string& name) const;
1904 // If this is an unnamed struct, build the complete list of methods,
1905 // including those from anonymous fields, and build methods stubs if
1908 finalize_methods(Gogo*);
1910 // Return whether this type has any methods. This should only be
1911 // called after the finalize_methods pass.
1913 has_any_methods() const
1914 { return this->all_methods_ != NULL; }
1916 // Return the methods for tihs type. This should only be called
1917 // after the finalize_methods pass.
1920 { return this->all_methods_; }
1922 // Return the method to use for NAME. This returns NULL if there is
1923 // no such method or if the method is ambiguous. When it returns
1924 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
1926 method_function(const std::string& name, bool* is_ambiguous) const;
1928 // Traverse just the field types of a struct type.
1930 traverse_field_types(Traverse* traverse)
1931 { return this->do_traverse(traverse); }
1933 // Import a struct type.
1937 // Fill in the fields for a named struct type.
1939 fill_in_tree(Gogo*, tree);
1943 do_traverse(Traverse*);
1949 do_has_pointer() const;
1952 do_hash_for_method(Gogo*) const;
1958 do_get_init_tree(Gogo*, tree, bool);
1961 do_type_descriptor(Gogo*, Named_type*);
1964 do_reflection(Gogo*, std::string*) const;
1967 do_mangled_name(Gogo*, std::string*) const;
1970 do_export(Export*) const;
1973 Field_reference_expression*
1974 field_reference_depth(Expression* struct_expr, const std::string& name,
1975 source_location, unsigned int* depth) const;
1978 make_struct_type_descriptor_type();
1980 // The fields of the struct.
1981 Struct_field_list* fields_;
1982 // The place where the struct was declared.
1983 source_location location_;
1984 // If this struct is unnamed, a list of methods.
1985 Methods* all_methods_;
1988 // The type of an array.
1990 class Array_type : public Type
1993 Array_type(Type* element_type, Expression* length)
1995 element_type_(element_type), length_(length), length_tree_(NULL)
1998 // Return the element type.
2000 element_type() const
2001 { return this->element_type_; }
2003 // Return the length. This will return NULL for an open array.
2006 { return this->length_; }
2008 // Whether this type is identical with T.
2010 is_identical(const Array_type* t, bool errors_are_identical) const;
2012 // Whether this type has any hidden fields.
2014 array_has_hidden_fields(const Named_type* within, std::string* reason) const
2015 { return this->element_type_->has_hidden_fields(within, reason); }
2017 // Return a tree for the pointer to the values in an array.
2019 value_pointer_tree(Gogo*, tree array) const;
2021 // Return a tree for the length of an array with this type.
2023 length_tree(Gogo*, tree array);
2025 // Return a tree for the capacity of an array with this type.
2027 capacity_tree(Gogo*, tree array);
2029 // Import an array type.
2033 // Fill in the fields for a named slice type.
2035 fill_in_tree(Gogo*, tree);
2039 do_traverse(Traverse* traverse);
2045 do_has_pointer() const
2047 return this->length_ == NULL || this->element_type_->has_pointer();
2051 do_hash_for_method(Gogo*) const;
2054 do_check_make_expression(Expression_list*, source_location);
2060 do_get_init_tree(Gogo*, tree, bool);
2063 do_make_expression_tree(Translate_context*, Expression_list*,
2067 do_type_descriptor(Gogo*, Named_type*);
2070 do_reflection(Gogo*, std::string*) const;
2073 do_mangled_name(Gogo*, std::string*) const;
2076 do_export(Export*) const;
2083 get_length_tree(Gogo*);
2086 make_array_type_descriptor_type();
2089 make_slice_type_descriptor_type();
2092 array_type_descriptor(Gogo*, Named_type*);
2095 slice_type_descriptor(Gogo*, Named_type*);
2097 // The type of elements of the array.
2098 Type* element_type_;
2099 // The number of elements. This may be NULL.
2100 Expression* length_;
2101 // The length as a tree. We only want to compute this once.
2105 // The type of a map.
2107 class Map_type : public Type
2110 Map_type(Type* key_type, Type* val_type, source_location location)
2112 key_type_(key_type), val_type_(val_type), location_(location)
2115 // Return the key type.
2118 { return this->key_type_; }
2120 // Return the value type.
2123 { return this->val_type_; }
2125 // Whether this type is identical with T.
2127 is_identical(const Map_type* t, bool errors_are_identical) const;
2129 // Import a map type.
2135 do_traverse(Traverse*);
2141 do_has_pointer() const
2145 do_hash_for_method(Gogo*) const;
2148 do_check_make_expression(Expression_list*, source_location);
2154 do_get_init_tree(Gogo*, tree, bool);
2157 do_make_expression_tree(Translate_context*, Expression_list*,
2161 do_type_descriptor(Gogo*, Named_type*);
2164 do_reflection(Gogo*, std::string*) const;
2167 do_mangled_name(Gogo*, std::string*) const;
2170 do_export(Export*) const;
2174 make_map_type_descriptor_type();
2180 // Where the type was defined.
2181 source_location location_;
2184 // The type of a channel.
2186 class Channel_type : public Type
2189 Channel_type(bool may_send, bool may_receive, Type* element_type)
2190 : Type(TYPE_CHANNEL),
2191 may_send_(may_send), may_receive_(may_receive),
2192 element_type_(element_type)
2193 { gcc_assert(may_send || may_receive); }
2195 // Whether this channel can send data.
2198 { return this->may_send_; }
2200 // Whether this channel can receive data.
2203 { return this->may_receive_; }
2205 // The type of the values that may be sent on this channel. This is
2206 // NULL if any type may be sent.
2208 element_type() const
2209 { return this->element_type_; }
2211 // Whether this type is identical with T.
2213 is_identical(const Channel_type* t, bool errors_are_identical) const;
2215 // Import a channel type.
2216 static Channel_type*
2221 do_traverse(Traverse* traverse)
2222 { return Type::traverse(this->element_type_, traverse); }
2225 do_has_pointer() const
2229 do_hash_for_method(Gogo*) const;
2232 do_check_make_expression(Expression_list*, source_location);
2238 do_get_init_tree(Gogo*, tree, bool);
2241 do_make_expression_tree(Translate_context*, Expression_list*,
2245 do_type_descriptor(Gogo*, Named_type*);
2248 do_reflection(Gogo*, std::string*) const;
2251 do_mangled_name(Gogo*, std::string*) const;
2254 do_export(Export*) const;
2258 make_chan_type_descriptor_type();
2260 // Whether this channel can send data.
2262 // Whether this channel can receive data.
2264 // The types of elements which may be sent on this channel. If this
2265 // is NULL, it means that any type may be sent.
2266 Type* element_type_;
2269 // An interface type.
2271 class Interface_type : public Type
2274 Interface_type(Typed_identifier_list* methods, source_location location)
2275 : Type(TYPE_INTERFACE),
2276 methods_(methods), location_(location)
2277 { gcc_assert(methods == NULL || !methods->empty()); }
2279 // Return whether this is an empty interface.
2282 { return this->methods_ == NULL; }
2284 // Return the list of methods. This will return NULL for an empty
2286 const Typed_identifier_list*
2288 { return this->methods_; }
2290 // Return the number of methods.
2292 method_count() const
2293 { return this->methods_ == NULL ? 0 : this->methods_->size(); }
2295 // Return the method NAME, or NULL.
2296 const Typed_identifier*
2297 find_method(const std::string& name) const;
2299 // Return the zero-based index of method NAME.
2301 method_index(const std::string& name) const;
2303 // Finalize the methods. This handles interface inheritance.
2307 // Return true if T implements this interface. If this returns
2308 // false, and REASON is not NULL, it sets *REASON to the reason that
2311 implements_interface(const Type* t, std::string* reason) const;
2313 // Whether this type is identical with T. REASON is as in
2314 // implements_interface.
2316 is_identical(const Interface_type* t, bool errors_are_identical) const;
2318 // Whether we can assign T to this type. is_identical is known to
2321 is_compatible_for_assign(const Interface_type*, std::string* reason) const;
2323 // Return whether NAME is a method which is not exported. This is
2324 // only used for better error reporting.
2326 is_unexported_method(Gogo*, const std::string& name) const;
2328 // Import an interface type.
2329 static Interface_type*
2332 // Fill in the fields for a named interface type.
2334 fill_in_tree(Gogo*, tree);
2338 do_traverse(Traverse*);
2341 do_has_pointer() const
2345 do_hash_for_method(Gogo*) const;
2351 do_get_init_tree(Gogo* gogo, tree, bool);
2354 do_type_descriptor(Gogo*, Named_type*);
2357 do_reflection(Gogo*, std::string*) const;
2360 do_mangled_name(Gogo*, std::string*) const;
2363 do_export(Export*) const;
2367 make_interface_type_descriptor_type();
2369 // The list of methods associated with the interface. This will be
2370 // NULL for the empty interface.
2371 Typed_identifier_list* methods_;
2372 // The location where the interface was defined.
2373 source_location location_;
2376 // The value we keep for a named type. This lets us get the right
2377 // name when we convert to trees. Note that we don't actually keep
2378 // the name here; the name is in the Named_object which points to
2379 // this. This object exists to hold a unique tree which represents
2382 class Named_type : public Type
2385 Named_type(Named_object* named_object, Type* type, source_location location)
2387 named_object_(named_object), in_function_(NULL), type_(type),
2388 local_methods_(NULL), all_methods_(NULL),
2389 interface_method_tables_(NULL), pointer_interface_method_tables_(NULL),
2390 location_(location), named_tree_(NULL), is_visible_(true),
2391 is_error_(false), seen_(0)
2394 // Return the associated Named_object. This holds the actual name.
2397 { return this->named_object_; }
2400 named_object() const
2401 { return this->named_object_; }
2403 // Set the Named_object. This is used when we see a type
2404 // declaration followed by a type.
2406 set_named_object(Named_object* no)
2407 { this->named_object_ = no; }
2409 // Return the function in which this type is defined. This will
2410 // return NULL for a type defined in global scope.
2413 { return this->in_function_; }
2415 // Set the function in which this type is defined.
2417 set_in_function(Named_object* f)
2418 { this->in_function_ = f; }
2420 // Return the name of the type.
2424 // Return the name of the type for an error message. The difference
2425 // is that if the type is defined in a different package, this will
2426 // return PACKAGE.NAME.
2428 message_name() const;
2430 // Return the underlying type.
2433 { return this->type_; }
2437 { return this->type_; }
2439 // Return the location.
2442 { return this->location_; }
2444 // Whether this type is visible. This only matters when parsing.
2447 { return this->is_visible_; }
2449 // Mark this type as visible.
2452 { this->is_visible_ = true; }
2454 // Mark this type as invisible.
2457 { this->is_visible_ = false; }
2459 // Whether this is a builtin type.
2462 { return this->location_ == BUILTINS_LOCATION; }
2464 // Return the base type for this type.
2471 // Return whether this is an error type.
2473 is_named_error_type() const;
2475 // Add a method to this type.
2477 add_method(const std::string& name, Function*);
2479 // Add a method declaration to this type.
2481 add_method_declaration(const std::string& name, Package* package,
2482 Function_type* type, source_location location);
2484 // Add an existing method--one defined before the type itself was
2485 // defined--to a type.
2487 add_existing_method(Named_object*);
2489 // Look up a local method.
2491 find_local_method(const std::string& name) const;
2493 // Return the list of local methods.
2495 local_methods() const
2496 { return this->local_methods_; }
2498 // Build the complete list of methods, including those from
2499 // anonymous fields, and build method stubs if needed.
2501 finalize_methods(Gogo*);
2503 // Return whether this type has any methods. This should only be
2504 // called after the finalize_methods pass.
2506 has_any_methods() const
2507 { return this->all_methods_ != NULL; }
2509 // Return the methods for this type. This should only be called
2510 // after the finalized_methods pass.
2513 { return this->all_methods_; }
2515 // Return the method to use for NAME. This returns NULL if there is
2516 // no such method or if the method is ambiguous. When it returns
2517 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
2519 method_function(const std::string& name, bool *is_ambiguous) const;
2521 // Return whether NAME is a known field or method which is not
2522 // exported. This is only used for better error reporting.
2524 is_unexported_local_method(Gogo*, const std::string& name) const;
2526 // Return a pointer to the interface method table for this type for
2527 // the interface INTERFACE. If IS_POINTER is true, set the type
2528 // descriptor to a pointer to this type, otherwise set it to this
2531 interface_method_table(Gogo*, const Interface_type* interface,
2534 // Whether this type has any hidden fields.
2536 named_type_has_hidden_fields(std::string* reason) const;
2540 export_named_type(Export*, const std::string& name) const;
2542 // Import a named type.
2544 import_named_type(Import*, Named_type**);
2548 do_traverse(Traverse* traverse)
2549 { return Type::traverse(this->type_, traverse); }
2555 do_has_pointer() const;
2558 do_hash_for_method(Gogo*) const;
2561 do_check_make_expression(Expression_list* args, source_location location)
2562 { return this->type_->check_make_expression(args, location); }
2568 do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
2569 { return this->type_->get_typed_init_tree(gogo, type_tree, is_clear); }
2572 do_make_expression_tree(Translate_context* context, Expression_list* args,
2573 source_location location)
2574 { return this->type_->make_expression_tree(context, args, location); }
2577 do_type_descriptor(Gogo*, Named_type*);
2580 do_reflection(Gogo*, std::string*) const;
2583 do_mangled_name(Gogo*, std::string* ret) const;
2586 do_export(Export*) const;
2589 // A mapping from interfaces to the associated interface method
2590 // tables for this type. This maps to a decl.
2591 typedef Unordered_map_hash(const Interface_type*, tree, Type_hash_identical,
2592 Type_identical) Interface_method_tables;
2594 // A pointer back to the Named_object for this type.
2595 Named_object* named_object_;
2596 // If this type is defined in a function, a pointer back to the
2597 // function in which it is defined.
2598 Named_object* in_function_;
2601 // The list of methods defined for this type. Any named type can
2603 Bindings* local_methods_;
2604 // The full list of methods for this type, including methods
2605 // declared for anonymous fields.
2606 Methods* all_methods_;
2607 // A mapping from interfaces to the associated interface method
2608 // tables for this type.
2609 Interface_method_tables* interface_method_tables_;
2610 // A mapping from interfaces to the associated interface method
2611 // tables for pointers to this type.
2612 Interface_method_tables* pointer_interface_method_tables_;
2613 // The location where this type was defined.
2614 source_location location_;
2615 // The tree for this type while converting to GENERIC. This is used
2616 // to avoid endless recursion when a named type refers to itself.
2618 // Whether this type is visible. This is false if this type was
2619 // created because it was referenced by an imported object, but the
2620 // type itself was not exported. This will always be true for types
2621 // created in the current package.
2623 // Whether this type is erroneous.
2625 // In a recursive operation such as has_hidden_fields, this flag is
2626 // used to prevent infinite recursion when a type refers to itself.
2627 // This is mutable because it is always reset to false when the
2632 // A forward declaration. This handles a type which has been declared
2635 class Forward_declaration_type : public Type
2638 Forward_declaration_type(Named_object* named_object);
2640 // The named object associated with this type declaration. This
2641 // will be resolved.
2646 named_object() const;
2648 // Return the name of the type.
2652 // Return the type to which this points. Give an error if the type
2653 // has not yet been defined.
2660 // Whether the base type has been defined.
2664 // Add a method to this type.
2666 add_method(const std::string& name, Function*);
2668 // Add a method declaration to this type.
2670 add_method_declaration(const std::string& name, Function_type*,
2675 do_traverse(Traverse* traverse);
2678 do_has_pointer() const
2679 { return this->real_type()->has_pointer(); }
2682 do_hash_for_method(Gogo* gogo) const
2683 { return this->real_type()->hash_for_method(gogo); }
2686 do_check_make_expression(Expression_list* args, source_location location)
2687 { return this->base()->check_make_expression(args, location); }
2690 do_get_tree(Gogo* gogo);
2693 do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
2694 { return this->base()->get_typed_init_tree(gogo, type_tree, is_clear); }
2697 do_make_expression_tree(Translate_context* context, Expression_list* args,
2698 source_location location)
2699 { return this->base()->make_expression_tree(context, args, location); }
2702 do_type_descriptor(Gogo*, Named_type*);
2705 do_reflection(Gogo*, std::string*) const;
2708 do_mangled_name(Gogo*, std::string* ret) const;
2711 do_export(Export*) const;
2714 // Issue a warning about a use of an undefined type.
2718 // The type declaration.
2719 Named_object* named_object_;
2720 // Whether we have issued a warning about this type.
2721 mutable bool warned_;
2724 // The Type_context struct describes what we expect for the type of an
2729 // The exact type we expect, if known. This may be NULL.
2731 // Whether an abstract type is permitted.
2732 bool may_be_abstract;
2736 : type(NULL), may_be_abstract(false)
2739 Type_context(Type* a_type, bool a_may_be_abstract)
2740 : type(a_type), may_be_abstract(a_may_be_abstract)
2744 #endif // !defined(GO_TYPES_H)