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
&);
796 // This type was passed to the builtin function make. ARGS are the
797 // arguments passed to make after the type; this may be NULL if
798 // there were none. Issue any required errors.
800 check_make_expression(Expression_list
* args
, source_location location
)
801 { return this->do_check_make_expression(args
, location
); }
803 // Return a tree representing this type.
807 // Return a tree representing a zero initialization for this type.
808 // This will be something like an INTEGER_CST or a CONSTRUCTOR. If
809 // IS_CLEAR is true, then the memory is known to be zeroed; in that
810 // case, this will return NULL if there is nothing to be done.
812 get_init_tree(Gogo
*, bool is_clear
);
814 // Like get_init_tree, but passing in the type to use for the
817 get_typed_init_tree(Gogo
* gogo
, tree type_tree
, bool is_clear
)
818 { return this->do_get_init_tree(gogo
, type_tree
, is_clear
); }
820 // Return a tree for a make expression applied to this type.
822 make_expression_tree(Translate_context
* context
, Expression_list
* args
,
823 source_location location
)
824 { return this->do_make_expression_tree(context
, args
, location
); }
826 // Build a type descriptor entry for this type. Return a pointer to
829 type_descriptor_pointer(Gogo
* gogo
);
831 // Return the type reflection string for this type.
833 reflection(Gogo
*) const;
835 // Return a mangled name for the type. This is a name which can be
836 // used in assembler code. Identical types should have the same
839 mangled_name(Gogo
*) const;
843 export_type(Export
* exp
) const
844 { this->do_export(exp
); }
848 import_type(Import
*);
851 Type(Type_classification
);
853 // Functions implemented by the child class.
855 // Traverse the subtypes.
857 do_traverse(Traverse
*);
865 do_has_pointer() const
869 do_hash_for_method(Gogo
*) const;
872 do_check_make_expression(Expression_list
* args
, source_location
);
876 do_get_tree(Gogo
*) = 0;
879 do_get_init_tree(Gogo
*, tree
, bool) = 0;
882 do_make_expression_tree(Translate_context
*, Expression_list
*,
886 do_type_descriptor(Gogo
*, Named_type
* name
) = 0;
889 do_reflection(Gogo
*, std::string
*) const = 0;
893 do_mangled_name(Gogo
*, std::string
*) const = 0;
896 do_export(Export
*) const;
898 // Return whether an expression is an integer.
900 check_int_value(Expression
*, const char*, source_location
);
902 // Return whether a method expects a pointer as the receiver.
904 method_expects_pointer(const Named_object
*);
906 // Finalize the methods for a type.
908 finalize_methods(Gogo
*, const Type
*, source_location
, Methods
**);
910 // Return a method from a set of methods.
912 method_function(const Methods
*, const std::string
& name
,
915 // Return a composite literal for the type descriptor entry for a
918 type_descriptor(Gogo
*, Type
*);
920 // Return a composite literal for the type descriptor entry for
921 // TYPE, using NAME as the name of the type.
923 named_type_descriptor(Gogo
*, Type
* type
, Named_type
* name
);
925 // Return a composite literal for a plain type descriptor for this
926 // type with the given kind and name.
928 plain_type_descriptor(Gogo
*, int runtime_type_kind
, Named_type
* name
);
930 // Build a composite literal for the basic type descriptor.
932 type_descriptor_constructor(Gogo
*, int runtime_type_kind
, Named_type
*,
933 const Methods
*, bool only_value_methods
);
935 // Make a builtin struct type from a list of fields.
937 make_builtin_struct_type(int nfields
, ...);
939 // Make a builtin named type.
941 make_builtin_named_type(const char* name
, Type
* type
);
943 // For the benefit of child class reflection string generation.
945 append_reflection(const Type
* type
, Gogo
* gogo
, std::string
* ret
) const
946 { type
->do_reflection(gogo
, ret
); }
948 // For the benefit of child class mangling.
950 append_mangled_name(const Type
* type
, Gogo
* gogo
, std::string
* ret
) const
951 { type
->do_mangled_name(gogo
, ret
); }
953 // Incorporate a string into a hash code.
955 hash_string(const std::string
&, unsigned int);
957 // Return a tree for the underlying type of a named type.
959 get_named_type_tree(Gogo
* gogo
, Type
* base_type
)
960 { return base_type
->get_tree_without_hash(gogo
); }
963 // Convert to the desired type classification, or return NULL. This
964 // is a controlled dynamic_cast.
965 template<typename Type_class
, Type_classification type_classification
>
969 Type
* base
= this->base();
970 return (base
->classification_
== type_classification
971 ? static_cast<Type_class
*>(base
)
975 template<typename Type_class
, Type_classification type_classification
>
979 const Type
* base
= this->base();
980 return (base
->classification_
== type_classification
981 ? static_cast<Type_class
*>(base
)
985 template<typename Type_class
, Type_classification type_classification
>
989 return (this->classification_
== type_classification
990 ? static_cast<Type_class
*>(this)
994 template<typename Type_class
, Type_classification type_classification
>
996 convert_no_base() const
998 return (this->classification_
== type_classification
999 ? static_cast<Type_class
*>(this)
1003 // Get the hash and equality functions for a type.
1005 type_functions(const char** hash_fn
, const char** equal_fn
) const;
1007 // Build a composite literal for the uncommon type information.
1009 uncommon_type_constructor(Gogo
*, Type
* uncommon_type
,
1010 Named_type
*, const Methods
*,
1011 bool only_value_methods
) const;
1013 // Build a composite literal for the methods.
1015 methods_constructor(Gogo
*, Type
* methods_type
, const Methods
*,
1016 bool only_value_methods
) const;
1018 // Build a composite literal for one method.
1020 method_constructor(Gogo
*, Type
* method_type
, const std::string
& name
,
1021 const Method
*) const;
1024 build_receive_return_type(tree type
);
1026 // A hash table we use to avoid infinite recursion.
1027 typedef Unordered_set_hash(const Named_type
*, Type_hash_identical
,
1028 Type_identical
) Types_seen
;
1030 // Add all methods for TYPE to the list of methods for THIS.
1032 add_methods_for_type(const Type
* type
, const Method::Field_indexes
*,
1033 unsigned int depth
, bool, bool, Types_seen
*,
1037 add_local_methods_for_type(const Named_type
* type
,
1038 const Method::Field_indexes
*,
1039 unsigned int depth
, bool, bool, Methods
**);
1042 add_embedded_methods_for_type(const Type
* type
,
1043 const Method::Field_indexes
*,
1044 unsigned int depth
, bool, bool, Types_seen
*,
1048 add_interface_methods_for_type(const Type
* type
,
1049 const Method::Field_indexes
*,
1050 unsigned int depth
, Methods
**);
1052 // Build stub methods for a type.
1054 build_stub_methods(Gogo
*, const Type
* type
, const Methods
* methods
,
1058 build_one_stub_method(Gogo
*, Method
*, const char* receiver_name
,
1059 const Typed_identifier_list
*, bool is_varargs
,
1063 apply_field_indexes(Expression
*, const Method::Field_indexes
*,
1066 // Look for a field or method named NAME in TYPE.
1068 find_field_or_method(const Type
* type
, const std::string
& name
,
1069 bool receiver_can_be_pointer
,
1070 int* level
, bool* is_method
,
1071 bool* found_pointer_method
,
1072 std::string
* ambig1
, std::string
* ambig2
);
1074 // Get a tree for a type without looking in the hash table for
1077 get_tree_without_hash(Gogo
*);
1079 // A mapping from Type to tree, used to ensure that the GIMPLE
1080 // representation of identical types is identical.
1081 typedef Unordered_map_hash(const Type
*, tree
, Type_hash_identical
,
1082 Type_identical
) Type_trees
;
1084 static Type_trees type_trees
;
1086 // The type classification.
1087 Type_classification classification_
;
1088 // The tree representation of the type, once it has been determined.
1090 // The decl for the type descriptor for this type. This starts out
1091 // as NULL and is filled in as needed.
1092 tree type_descriptor_decl_
;
1095 // Type hash table operations.
1097 class Type_hash_identical
1101 operator()(const Type
* type
) const
1102 { return type
->hash_for_method(NULL
); }
1105 class Type_identical
1109 operator()(const Type
* t1
, const Type
* t2
) const
1110 { return Type::are_identical(t1
, t2
, false, NULL
); }
1113 // An identifier with a type.
1115 class Typed_identifier
1118 Typed_identifier(const std::string
& name
, Type
* type
,
1119 source_location location
)
1120 : name_(name
), type_(type
), location_(location
)
1126 { return this->name_
; }
1131 { return this->type_
; }
1133 // Return the location where the name was seen. This is not always
1137 { return this->location_
; }
1139 // Set the type--sometimes we see the identifier before the type.
1141 set_type(Type
* type
)
1143 gcc_assert(this->type_
== NULL
|| type
->is_error_type());
1152 // The location where the name was seen.
1153 source_location location_
;
1156 // A list of Typed_identifiers.
1158 class Typed_identifier_list
1161 Typed_identifier_list()
1165 // Whether the list is empty.
1168 { return this->entries_
.empty(); }
1170 // Return the number of entries in the list.
1173 { return this->entries_
.size(); }
1175 // Add an entry to the end of the list.
1177 push_back(const Typed_identifier
& td
)
1178 { this->entries_
.push_back(td
); }
1180 // Remove an entry from the end of the list.
1183 { this->entries_
.pop_back(); }
1185 // Set the type of entry I to TYPE.
1187 set_type(size_t i
, Type
* type
)
1189 gcc_assert(i
< this->entries_
.size());
1190 this->entries_
[i
].set_type(type
);
1193 // Sort the entries by name.
1199 traverse(Traverse
*);
1201 // Return the first and last elements.
1204 { return this->entries_
.front(); }
1206 const Typed_identifier
&
1208 { return this->entries_
.front(); }
1212 { return this->entries_
.back(); }
1214 const Typed_identifier
&
1216 { return this->entries_
.back(); }
1218 const Typed_identifier
&
1220 { return this->entries_
.at(i
); }
1223 set(size_t i
, const Typed_identifier
& t
)
1224 { this->entries_
.at(i
) = t
; }
1229 gcc_assert(c
<= this->entries_
.size());
1230 this->entries_
.resize(c
, Typed_identifier("", NULL
, UNKNOWN_LOCATION
));
1235 typedef std::vector
<Typed_identifier
>::iterator iterator
;
1236 typedef std::vector
<Typed_identifier
>::const_iterator const_iterator
;
1240 { return this->entries_
.begin(); }
1244 { return this->entries_
.begin(); }
1248 { return this->entries_
.end(); }
1252 { return this->entries_
.end(); }
1254 // Return a copy of this list. This returns an independent copy of
1255 // the vector, but does not copy the types.
1256 Typed_identifier_list
*
1260 std::vector
<Typed_identifier
> entries_
;
1263 // The type of an integer.
1265 class Integer_type
: public Type
1268 // Create a new integer type.
1270 create_integer_type(const char* name
, bool is_unsigned
, int bits
,
1271 int runtime_type_kind
);
1273 // Look up an existing integer type.
1275 lookup_integer_type(const char* name
);
1277 // Create an abstract integer type.
1278 static Integer_type
*
1279 create_abstract_integer_type();
1281 // Whether this is an abstract integer type.
1284 { return this->is_abstract_
; }
1286 // Whether this is an unsigned type.
1289 { return this->is_unsigned_
; }
1291 // The number of bits.
1294 { return this->bits_
; }
1296 // Whether this type is the same as T.
1298 is_identical(const Integer_type
* t
) const;
1302 do_hash_for_method(Gogo
*) const;
1308 do_get_init_tree(Gogo
*, tree
, bool);
1311 do_type_descriptor(Gogo
*, Named_type
*);
1314 do_reflection(Gogo
*, std::string
*) const;
1317 do_mangled_name(Gogo
*, std::string
*) const;
1320 Integer_type(bool is_abstract
, bool is_unsigned
, int bits
,
1321 int runtime_type_kind
)
1322 : Type(TYPE_INTEGER
),
1323 is_abstract_(is_abstract
), is_unsigned_(is_unsigned
), bits_(bits
),
1324 runtime_type_kind_(runtime_type_kind
)
1327 // Map names of integer types to the types themselves.
1328 typedef std::map
<std::string
, Named_type
*> Named_integer_types
;
1329 static Named_integer_types named_integer_types
;
1331 // True if this is an abstract type.
1333 // True if this is an unsigned type.
1335 // The number of bits.
1337 // The runtime type code used in the type descriptor for this type.
1338 int runtime_type_kind_
;
1341 // The type of a floating point number.
1343 class Float_type
: public Type
1346 // Create a new float type.
1348 create_float_type(const char* name
, int bits
, int runtime_type_kind
);
1350 // Look up an existing float type.
1352 lookup_float_type(const char* name
);
1354 // Create an abstract float type.
1356 create_abstract_float_type();
1358 // Whether this is an abstract float type.
1361 { return this->is_abstract_
; }
1363 // The number of bits.
1366 { return this->bits_
; }
1368 // Whether this type is the same as T.
1370 is_identical(const Float_type
* t
) const;
1372 // Return a tree for this type without using a Gogo*.
1378 do_hash_for_method(Gogo
*) const;
1384 do_get_init_tree(Gogo
*, tree
, bool);
1387 do_type_descriptor(Gogo
*, Named_type
*);
1390 do_reflection(Gogo
*, std::string
*) const;
1393 do_mangled_name(Gogo
*, std::string
*) const;
1396 Float_type(bool is_abstract
, int bits
, int runtime_type_kind
)
1398 is_abstract_(is_abstract
), bits_(bits
),
1399 runtime_type_kind_(runtime_type_kind
)
1402 // Map names of float types to the types themselves.
1403 typedef std::map
<std::string
, Named_type
*> Named_float_types
;
1404 static Named_float_types named_float_types
;
1406 // True if this is an abstract type.
1408 // The number of bits in the floating point value.
1410 // The runtime type code used in the type descriptor for this type.
1411 int runtime_type_kind_
;
1414 // The type of a complex number.
1416 class Complex_type
: public Type
1419 // Create a new complex type.
1421 create_complex_type(const char* name
, int bits
, int runtime_type_kind
);
1423 // Look up an existing complex type.
1425 lookup_complex_type(const char* name
);
1427 // Create an abstract complex type.
1428 static Complex_type
*
1429 create_abstract_complex_type();
1431 // Whether this is an abstract complex type.
1434 { return this->is_abstract_
; }
1436 // The number of bits: 64 or 128.
1438 { return this->bits_
; }
1440 // Whether this type is the same as T.
1442 is_identical(const Complex_type
* t
) const;
1444 // Return a tree for this type without using a Gogo*.
1450 do_hash_for_method(Gogo
*) const;
1456 do_get_init_tree(Gogo
*, tree
, bool);
1459 do_type_descriptor(Gogo
*, Named_type
*);
1462 do_reflection(Gogo
*, std::string
*) const;
1465 do_mangled_name(Gogo
*, std::string
*) const;
1468 Complex_type(bool is_abstract
, int bits
, int runtime_type_kind
)
1469 : Type(TYPE_COMPLEX
),
1470 is_abstract_(is_abstract
), bits_(bits
),
1471 runtime_type_kind_(runtime_type_kind
)
1474 // Map names of complex types to the types themselves.
1475 typedef std::map
<std::string
, Named_type
*> Named_complex_types
;
1476 static Named_complex_types named_complex_types
;
1478 // True if this is an abstract type.
1480 // The number of bits in the complex value--64 or 128.
1482 // The runtime type code used in the type descriptor for this type.
1483 int runtime_type_kind_
;
1486 // The type of a string.
1488 class String_type
: public Type
1495 // Return a tree for the length of STRING.
1497 length_tree(Gogo
*, tree string
);
1499 // Return a tree which points to the bytes of STRING.
1501 bytes_tree(Gogo
*, tree string
);
1505 do_has_pointer() const
1512 do_get_init_tree(Gogo
* gogo
, tree
, bool);
1515 do_type_descriptor(Gogo
*, Named_type
*);
1518 do_reflection(Gogo
*, std::string
*) const;
1521 do_mangled_name(Gogo
*, std::string
* ret
) const;
1524 // The named string type.
1525 static Named_type
* string_type_
;
1528 // The type of a function.
1530 class Function_type
: public Type
1533 Function_type(Typed_identifier
* receiver
, Typed_identifier_list
* parameters
,
1534 Typed_identifier_list
* results
, source_location location
)
1535 : Type(TYPE_FUNCTION
),
1536 receiver_(receiver
), parameters_(parameters
), results_(results
),
1537 location_(location
), is_varargs_(false), is_builtin_(false)
1540 // Get the receiver.
1541 const Typed_identifier
*
1543 { return this->receiver_
; }
1545 // Get the return names and types.
1546 const Typed_identifier_list
*
1548 { return this->results_
; }
1550 // Get the parameter names and types.
1551 const Typed_identifier_list
*
1553 { return this->parameters_
; }
1555 // Whether this is a varargs function.
1558 { return this->is_varargs_
; }
1560 // Whether this is a builtin function.
1563 { return this->is_builtin_
; }
1565 // The location where this type was defined.
1568 { return this->location_
; }
1570 // Return whether this is a method type.
1573 { return this->receiver_
!= NULL
; }
1575 // Whether T is a valid redeclaration of this type. This is called
1576 // when a function is declared more than once.
1578 is_valid_redeclaration(const Function_type
* t
, std::string
*) const;
1580 // Whether this type is the same as T.
1582 is_identical(const Function_type
* t
, bool ignore_receiver
,
1583 bool errors_are_identical
, std::string
*) const;
1585 // Record that this is a varargs function.
1588 { this->is_varargs_
= true; }
1590 // Record that this is a builtin function.
1593 { this->is_builtin_
= true; }
1595 // Import a function type.
1596 static Function_type
*
1599 // Return a copy of this type without a receiver. This is only
1600 // valid for a method type.
1602 copy_without_receiver() const;
1604 // Return a copy of this type with a receiver. This is used when an
1605 // interface method is attached to a named or struct type.
1607 copy_with_receiver(Type
*) const;
1611 do_traverse(Traverse
*);
1613 // A trampoline function has a pointer which matters for GC.
1615 do_has_pointer() const
1619 do_hash_for_method(Gogo
*) const;
1625 do_get_init_tree(Gogo
*, tree
, bool);
1628 do_type_descriptor(Gogo
*, Named_type
*);
1631 do_reflection(Gogo
*, std::string
*) const;
1634 do_mangled_name(Gogo
*, std::string
*) const;
1637 do_export(Export
*) const;
1641 make_function_type_descriptor_type();
1644 type_descriptor_params(Type
*, const Typed_identifier
*,
1645 const Typed_identifier_list
*);
1647 // The receiver name and type. This will be NULL for a normal
1648 // function, non-NULL for a method.
1649 Typed_identifier
* receiver_
;
1650 // The parameter names and types.
1651 Typed_identifier_list
* parameters_
;
1652 // The result names and types. This will be NULL if no result was
1654 Typed_identifier_list
* results_
;
1655 // The location where this type was defined. This exists solely to
1656 // give a location for the fields of the struct if this function
1657 // returns multiple values.
1658 source_location location_
;
1659 // Whether this function takes a variable number of arguments.
1661 // Whether this is a special builtin function which can not simply
1662 // be called. This is used for len, cap, etc.
1666 // The type of a pointer.
1668 class Pointer_type
: public Type
1671 Pointer_type(Type
* to_type
)
1672 : Type(TYPE_POINTER
),
1678 { return this->to_type_
; }
1680 // Import a pointer type.
1681 static Pointer_type
*
1686 do_traverse(Traverse
*);
1689 do_has_pointer() const
1693 do_hash_for_method(Gogo
*) const;
1699 do_get_init_tree(Gogo
*, tree
, bool);
1702 do_type_descriptor(Gogo
*, Named_type
*);
1705 do_reflection(Gogo
*, std::string
*) const;
1708 do_mangled_name(Gogo
*, std::string
*) const;
1711 do_export(Export
*) const;
1715 make_pointer_type_descriptor_type();
1717 // The type to which this type points.
1721 // The type of a field in a struct.
1726 explicit Struct_field(const Typed_identifier
& typed_identifier
)
1727 : typed_identifier_(typed_identifier
), tag_(NULL
)
1737 { return this->typed_identifier_
.type(); }
1739 // The field location.
1742 { return this->typed_identifier_
.location(); }
1744 // Whether the field has a tag.
1747 { return this->tag_
!= NULL
; }
1753 gcc_assert(this->tag_
!= NULL
);
1757 // Whether this is an anonymous field.
1759 is_anonymous() const
1760 { return this->typed_identifier_
.name().empty(); }
1762 // Set the tag. FIXME: This is never freed.
1764 set_tag(const std::string
& tag
)
1765 { this->tag_
= new std::string(tag
); }
1767 // Set the type. This is only used in error cases.
1769 set_type(Type
* type
)
1770 { this->typed_identifier_
.set_type(type
); }
1773 // The field name, type, and location.
1774 Typed_identifier typed_identifier_
;
1775 // The field tag. This is NULL if the field has no tag.
1779 // A list of struct fields.
1781 class Struct_field_list
1788 // Whether the list is empty.
1791 { return this->entries_
.empty(); }
1793 // Return the number of entries.
1796 { return this->entries_
.size(); }
1798 // Add an entry to the end of the list.
1800 push_back(const Struct_field
& sf
)
1801 { this->entries_
.push_back(sf
); }
1803 // Index into the list.
1806 { return this->entries_
.at(i
); }
1808 // Last entry in list.
1811 { return this->entries_
.back(); }
1815 typedef std::vector
<Struct_field
>::iterator iterator
;
1816 typedef std::vector
<Struct_field
>::const_iterator const_iterator
;
1820 { return this->entries_
.begin(); }
1824 { return this->entries_
.begin(); }
1828 { return this->entries_
.end(); }
1832 { return this->entries_
.end(); }
1835 std::vector
<Struct_field
> entries_
;
1838 // The type of a struct.
1840 class Struct_type
: public Type
1843 Struct_type(Struct_field_list
* fields
, source_location location
)
1844 : Type(TYPE_STRUCT
),
1845 fields_(fields
), location_(location
), all_methods_(NULL
)
1848 // Return the field NAME. This only looks at local fields, not at
1849 // embedded types. If the field is found, and PINDEX is not NULL,
1850 // this sets *PINDEX to the field index. If the field is not found,
1851 // this returns NULL.
1853 find_local_field(const std::string
& name
, unsigned int *pindex
) const;
1855 // Return the field number INDEX.
1857 field(unsigned int index
) const
1858 { return &this->fields_
->at(index
); }
1860 // Get the struct fields.
1861 const Struct_field_list
*
1863 { return this->fields_
; }
1865 // Return the number of fields.
1868 { return this->fields_
->size(); }
1870 // Push a new field onto the end of the struct. This is used when
1871 // building a closure variable.
1873 push_field(const Struct_field
& sf
)
1874 { this->fields_
->push_back(sf
); }
1876 // Return an expression referring to field NAME in STRUCT_EXPR, or
1877 // NULL if there is no field with that name.
1878 Field_reference_expression
*
1879 field_reference(Expression
* struct_expr
, const std::string
& name
,
1880 source_location
) const;
1882 // Return the total number of fields, including embedded fields.
1883 // This is the number of values which can appear in a conversion to
1886 total_field_count() const;
1888 // Whether this type is identical with T.
1890 is_identical(const Struct_type
* t
, bool errors_are_identical
) const;
1892 // Whether this struct type has any hidden fields. This returns
1893 // true if any fields have hidden names, or if any non-pointer
1894 // anonymous fields have types with hidden fields.
1896 struct_has_hidden_fields(const Named_type
* within
, std::string
*) const;
1898 // Return whether NAME is a local field which is not exported. This
1899 // is only used for better error reporting.
1901 is_unexported_local_field(Gogo
*, const std::string
& name
) const;
1903 // If this is an unnamed struct, build the complete list of methods,
1904 // including those from anonymous fields, and build methods stubs if
1907 finalize_methods(Gogo
*);
1909 // Return whether this type has any methods. This should only be
1910 // called after the finalize_methods pass.
1912 has_any_methods() const
1913 { return this->all_methods_
!= NULL
; }
1915 // Return the methods for tihs type. This should only be called
1916 // after the finalize_methods pass.
1919 { return this->all_methods_
; }
1921 // Return the method to use for NAME. This returns NULL if there is
1922 // no such method or if the method is ambiguous. When it returns
1923 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
1925 method_function(const std::string
& name
, bool* is_ambiguous
) const;
1927 // Traverse just the field types of a struct type.
1929 traverse_field_types(Traverse
* traverse
)
1930 { return this->do_traverse(traverse
); }
1932 // Import a struct type.
1936 // Fill in the fields for a named struct type.
1938 fill_in_tree(Gogo
*, tree
);
1942 do_traverse(Traverse
*);
1948 do_has_pointer() const;
1951 do_hash_for_method(Gogo
*) const;
1957 do_get_init_tree(Gogo
*, tree
, bool);
1960 do_type_descriptor(Gogo
*, Named_type
*);
1963 do_reflection(Gogo
*, std::string
*) const;
1966 do_mangled_name(Gogo
*, std::string
*) const;
1969 do_export(Export
*) const;
1972 Field_reference_expression
*
1973 field_reference_depth(Expression
* struct_expr
, const std::string
& name
,
1974 source_location
, unsigned int* depth
) const;
1977 make_struct_type_descriptor_type();
1979 // The fields of the struct.
1980 Struct_field_list
* fields_
;
1981 // The place where the struct was declared.
1982 source_location location_
;
1983 // If this struct is unnamed, a list of methods.
1984 Methods
* all_methods_
;
1987 // The type of an array.
1989 class Array_type
: public Type
1992 Array_type(Type
* element_type
, Expression
* length
)
1994 element_type_(element_type
), length_(length
), length_tree_(NULL
)
1997 // Return the element type.
1999 element_type() const
2000 { return this->element_type_
; }
2002 // Return the length. This will return NULL for an open array.
2005 { return this->length_
; }
2007 // Whether this type is identical with T.
2009 is_identical(const Array_type
* t
, bool errors_are_identical
) const;
2011 // Whether this type has any hidden fields.
2013 array_has_hidden_fields(const Named_type
* within
, std::string
* reason
) const
2014 { return this->element_type_
->has_hidden_fields(within
, reason
); }
2016 // Return a tree for the pointer to the values in an array.
2018 value_pointer_tree(Gogo
*, tree array
) const;
2020 // Return a tree for the length of an array with this type.
2022 length_tree(Gogo
*, tree array
);
2024 // Return a tree for the capacity of an array with this type.
2026 capacity_tree(Gogo
*, tree array
);
2028 // Import an array type.
2032 // Fill in the fields for a named slice type.
2034 fill_in_tree(Gogo
*, tree
);
2038 do_traverse(Traverse
* traverse
);
2044 do_has_pointer() const
2046 return this->length_
== NULL
|| this->element_type_
->has_pointer();
2050 do_hash_for_method(Gogo
*) const;
2053 do_check_make_expression(Expression_list
*, source_location
);
2059 do_get_init_tree(Gogo
*, tree
, bool);
2062 do_make_expression_tree(Translate_context
*, Expression_list
*,
2066 do_type_descriptor(Gogo
*, Named_type
*);
2069 do_reflection(Gogo
*, std::string
*) const;
2072 do_mangled_name(Gogo
*, std::string
*) const;
2075 do_export(Export
*) const;
2082 get_length_tree(Gogo
*);
2085 make_array_type_descriptor_type();
2088 make_slice_type_descriptor_type();
2091 array_type_descriptor(Gogo
*, Named_type
*);
2094 slice_type_descriptor(Gogo
*, Named_type
*);
2096 // The type of elements of the array.
2097 Type
* element_type_
;
2098 // The number of elements. This may be NULL.
2099 Expression
* length_
;
2100 // The length as a tree. We only want to compute this once.
2104 // The type of a map.
2106 class Map_type
: public Type
2109 Map_type(Type
* key_type
, Type
* val_type
, source_location location
)
2111 key_type_(key_type
), val_type_(val_type
), location_(location
)
2114 // Return the key type.
2117 { return this->key_type_
; }
2119 // Return the value type.
2122 { return this->val_type_
; }
2124 // Whether this type is identical with T.
2126 is_identical(const Map_type
* t
, bool errors_are_identical
) const;
2128 // Import a map type.
2134 do_traverse(Traverse
*);
2140 do_has_pointer() const
2144 do_hash_for_method(Gogo
*) const;
2147 do_check_make_expression(Expression_list
*, source_location
);
2153 do_get_init_tree(Gogo
*, tree
, bool);
2156 do_make_expression_tree(Translate_context
*, Expression_list
*,
2160 do_type_descriptor(Gogo
*, Named_type
*);
2163 do_reflection(Gogo
*, std::string
*) const;
2166 do_mangled_name(Gogo
*, std::string
*) const;
2169 do_export(Export
*) const;
2173 make_map_type_descriptor_type();
2179 // Where the type was defined.
2180 source_location location_
;
2183 // The type of a channel.
2185 class Channel_type
: public Type
2188 Channel_type(bool may_send
, bool may_receive
, Type
* element_type
)
2189 : Type(TYPE_CHANNEL
),
2190 may_send_(may_send
), may_receive_(may_receive
),
2191 element_type_(element_type
)
2192 { gcc_assert(may_send
|| may_receive
); }
2194 // Whether this channel can send data.
2197 { return this->may_send_
; }
2199 // Whether this channel can receive data.
2202 { return this->may_receive_
; }
2204 // The type of the values that may be sent on this channel. This is
2205 // NULL if any type may be sent.
2207 element_type() const
2208 { return this->element_type_
; }
2210 // Whether this type is identical with T.
2212 is_identical(const Channel_type
* t
, bool errors_are_identical
) const;
2214 // Import a channel type.
2215 static Channel_type
*
2220 do_traverse(Traverse
* traverse
)
2221 { return Type::traverse(this->element_type_
, traverse
); }
2224 do_has_pointer() const
2228 do_hash_for_method(Gogo
*) const;
2231 do_check_make_expression(Expression_list
*, source_location
);
2237 do_get_init_tree(Gogo
*, tree
, bool);
2240 do_make_expression_tree(Translate_context
*, Expression_list
*,
2244 do_type_descriptor(Gogo
*, Named_type
*);
2247 do_reflection(Gogo
*, std::string
*) const;
2250 do_mangled_name(Gogo
*, std::string
*) const;
2253 do_export(Export
*) const;
2257 make_chan_type_descriptor_type();
2259 // Whether this channel can send data.
2261 // Whether this channel can receive data.
2263 // The types of elements which may be sent on this channel. If this
2264 // is NULL, it means that any type may be sent.
2265 Type
* element_type_
;
2268 // An interface type.
2270 class Interface_type
: public Type
2273 Interface_type(Typed_identifier_list
* methods
, source_location location
)
2274 : Type(TYPE_INTERFACE
),
2275 methods_(methods
), location_(location
)
2276 { gcc_assert(methods
== NULL
|| !methods
->empty()); }
2278 // Return whether this is an empty interface.
2281 { return this->methods_
== NULL
; }
2283 // Return the list of methods. This will return NULL for an empty
2285 const Typed_identifier_list
*
2287 { return this->methods_
; }
2289 // Return the number of methods.
2291 method_count() const
2292 { return this->methods_
== NULL
? 0 : this->methods_
->size(); }
2294 // Return the method NAME, or NULL.
2295 const Typed_identifier
*
2296 find_method(const std::string
& name
) const;
2298 // Return the zero-based index of method NAME.
2300 method_index(const std::string
& name
) const;
2302 // Finalize the methods. This handles interface inheritance.
2306 // Return true if T implements this interface. If this returns
2307 // false, and REASON is not NULL, it sets *REASON to the reason that
2310 implements_interface(const Type
* t
, std::string
* reason
) const;
2312 // Whether this type is identical with T. REASON is as in
2313 // implements_interface.
2315 is_identical(const Interface_type
* t
, bool errors_are_identical
) const;
2317 // Whether we can assign T to this type. is_identical is known to
2320 is_compatible_for_assign(const Interface_type
*, std::string
* reason
) const;
2322 // Return whether NAME is a method which is not exported. This is
2323 // only used for better error reporting.
2325 is_unexported_method(Gogo
*, const std::string
& name
) const;
2327 // Import an interface type.
2328 static Interface_type
*
2331 // Fill in the fields for a named interface type.
2333 fill_in_tree(Gogo
*, tree
);
2337 do_traverse(Traverse
*);
2340 do_has_pointer() const
2344 do_hash_for_method(Gogo
*) const;
2350 do_get_init_tree(Gogo
* gogo
, tree
, bool);
2353 do_type_descriptor(Gogo
*, Named_type
*);
2356 do_reflection(Gogo
*, std::string
*) const;
2359 do_mangled_name(Gogo
*, std::string
*) const;
2362 do_export(Export
*) const;
2366 make_interface_type_descriptor_type();
2368 // The list of methods associated with the interface. This will be
2369 // NULL for the empty interface.
2370 Typed_identifier_list
* methods_
;
2371 // The location where the interface was defined.
2372 source_location location_
;
2375 // The value we keep for a named type. This lets us get the right
2376 // name when we convert to trees. Note that we don't actually keep
2377 // the name here; the name is in the Named_object which points to
2378 // this. This object exists to hold a unique tree which represents
2381 class Named_type
: public Type
2384 Named_type(Named_object
* named_object
, Type
* type
, source_location location
)
2386 named_object_(named_object
), in_function_(NULL
), type_(type
),
2387 local_methods_(NULL
), all_methods_(NULL
),
2388 interface_method_tables_(NULL
), pointer_interface_method_tables_(NULL
),
2389 location_(location
), named_tree_(NULL
), is_visible_(true),
2390 is_error_(false), seen_(0)
2393 // Return the associated Named_object. This holds the actual name.
2396 { return this->named_object_
; }
2399 named_object() const
2400 { return this->named_object_
; }
2402 // Set the Named_object. This is used when we see a type
2403 // declaration followed by a type.
2405 set_named_object(Named_object
* no
)
2406 { this->named_object_
= no
; }
2408 // Return the function in which this type is defined. This will
2409 // return NULL for a type defined in global scope.
2412 { return this->in_function_
; }
2414 // Set the function in which this type is defined.
2416 set_in_function(Named_object
* f
)
2417 { this->in_function_
= f
; }
2419 // Return the name of the type.
2423 // Return the name of the type for an error message. The difference
2424 // is that if the type is defined in a different package, this will
2425 // return PACKAGE.NAME.
2427 message_name() const;
2429 // Return the underlying type.
2432 { return this->type_
; }
2436 { return this->type_
; }
2438 // Return the location.
2441 { return this->location_
; }
2443 // Whether this type is visible. This only matters when parsing.
2446 { return this->is_visible_
; }
2448 // Mark this type as visible.
2451 { this->is_visible_
= true; }
2453 // Mark this type as invisible.
2456 { this->is_visible_
= false; }
2458 // Whether this is a builtin type.
2461 { return this->location_
== BUILTINS_LOCATION
; }
2463 // Return the base type for this type.
2470 // Return whether this is an error type.
2472 is_named_error_type() const;
2474 // Add a method to this type.
2476 add_method(const std::string
& name
, Function
*);
2478 // Add a method declaration to this type.
2480 add_method_declaration(const std::string
& name
, Package
* package
,
2481 Function_type
* type
, source_location location
);
2483 // Add an existing method--one defined before the type itself was
2484 // defined--to a type.
2486 add_existing_method(Named_object
*);
2488 // Look up a local method.
2490 find_local_method(const std::string
& name
) const;
2492 // Return the list of local methods.
2494 local_methods() const
2495 { return this->local_methods_
; }
2497 // Build the complete list of methods, including those from
2498 // anonymous fields, and build method stubs if needed.
2500 finalize_methods(Gogo
*);
2502 // Return whether this type has any methods. This should only be
2503 // called after the finalize_methods pass.
2505 has_any_methods() const
2506 { return this->all_methods_
!= NULL
; }
2508 // Return the methods for this type. This should only be called
2509 // after the finalized_methods pass.
2512 { return this->all_methods_
; }
2514 // Return the method to use for NAME. This returns NULL if there is
2515 // no such method or if the method is ambiguous. When it returns
2516 // NULL, this sets *IS_AMBIGUOUS if the method name is ambiguous.
2518 method_function(const std::string
& name
, bool *is_ambiguous
) const;
2520 // Return whether NAME is a known field or method which is not
2521 // exported. This is only used for better error reporting.
2523 is_unexported_local_method(Gogo
*, const std::string
& name
) const;
2525 // Return a pointer to the interface method table for this type for
2526 // the interface INTERFACE. If IS_POINTER is true, set the type
2527 // descriptor to a pointer to this type, otherwise set it to this
2530 interface_method_table(Gogo
*, const Interface_type
* interface
,
2533 // Whether this type has any hidden fields.
2535 named_type_has_hidden_fields(std::string
* reason
) const;
2539 export_named_type(Export
*, const std::string
& name
) const;
2541 // Import a named type.
2543 import_named_type(Import
*, Named_type
**);
2547 do_traverse(Traverse
* traverse
)
2548 { return Type::traverse(this->type_
, traverse
); }
2554 do_has_pointer() const
2555 { return this->type_
->has_pointer(); }
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->base()->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)