/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GCC.
lang_identifier nodes, because some keywords are only special in a
particular context. */
-struct lang_identifier
+struct lang_identifier GTY(())
{
- struct c_common_identifier ignore;
- tree global_value, local_value, label_value, implicit_decl;
- tree error_locus, limbo_value;
+ struct c_common_identifier common_id;
+ tree symbol_value;
+ tree tag_value;
+ tree label_value;
+};
+
+/* The resulting tree type. */
+
+union lang_tree_node
+ GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
+ chain_next ("TREE_CODE (&%h.generic) == INTEGER_TYPE ? (union lang_tree_node *)TYPE_NEXT_VARIANT (&%h.generic) : (union lang_tree_node *)TREE_CHAIN (&%h.generic)")))
+{
+ union tree_node GTY ((tag ("0"),
+ desc ("tree_node_structure (&%h)")))
+ generic;
+ struct lang_identifier GTY ((tag ("1"))) identifier;
};
/* Language-specific declaration information. */
-struct lang_decl
+struct lang_decl GTY(())
{
struct c_lang_decl base;
/* The return types and parameter types may have variable size.
/* Macros for access to language-specific slots in an identifier. */
/* Each of these slots contains a DECL node or null. */
-/* This represents the value which the identifier has in the
- file-scope namespace. */
-#define IDENTIFIER_GLOBAL_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->global_value)
-/* This represents the value which the identifier has in the current
- scope. */
-#define IDENTIFIER_LOCAL_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->local_value)
-/* This represents the value which the identifier has as a label in
- the current label scope. */
+/* The value of the identifier in the namespace of "ordinary identifiers"
+ (data objects, enum constants, functions, typedefs). */
+#define IDENTIFIER_SYMBOL_VALUE(NODE) \
+ (((struct lang_identifier *) (NODE))->symbol_value)
+/* The value of the identifier in the namespace of struct, union,
+ and enum tags. */
+#define IDENTIFIER_TAG_VALUE(NODE) \
+ (((struct lang_identifier *) (NODE))->tag_value)
+/* The value of the identifier in the namespace of labels. */
#define IDENTIFIER_LABEL_VALUE(NODE) \
(((struct lang_identifier *) (NODE))->label_value)
-/* This records the extern decl of this identifier, if it has had one
- at any point in this compilation. */
-#define IDENTIFIER_LIMBO_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->limbo_value)
-/* This records the implicit function decl of this identifier, if it
- has had one at any point in this compilation. */
-#define IDENTIFIER_IMPLICIT_DECL(NODE) \
- (((struct lang_identifier *) (NODE))->implicit_decl)
-/* This is the last function in which we printed an "undefined variable"
- message for this identifier. Value is a FUNCTION_DECL or null. */
-#define IDENTIFIER_ERROR_LOCUS(NODE) \
- (((struct lang_identifier *) (NODE))->error_locus)
/* In identifiers, C uses the following fields in a special way:
TREE_PUBLIC to record that there was a previous local extern decl.
(DECL_LANG_SPECIFIC (NODE)->base.declared_inline)
/* In a RECORD_TYPE, a sorted array of the fields of the type. */
-struct lang_type
+struct lang_type GTY(())
{
- int len;
- tree elts[1];
+ struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
};
/* Record whether a type or decl was written with nonconstant size.
#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
-#if 0 /* Not used. */
-/* Record whether a decl for a function or function pointer has
- already been mentioned (in a warning) because it was called
- but didn't have a prototype. */
-#define C_MISSING_PROTOTYPE_WARNED(DECL) DECL_LANG_FLAG_2 (DECL)
-#endif
-
/* Store a value in that field. */
#define C_SET_EXP_ORIGINAL_CODE(EXP, CODE) \
(TREE_COMPLEXITY (EXP) = (int) (CODE))
return type. */
#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
-/* Nonzero for a declaration of a built in function if there has been no
- occasion that would declare the function in ordinary C.
- Using the function draws a pedantic warning in this case. */
-#define C_DECL_ANTICIPATED(EXP) DECL_LANG_FLAG_3 (EXP)
+/* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
+#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
+
+/* Nonzero for a declaration of an external object which is not
+ currently in scope. This is either a built-in declaration of
+ a library function, before a real declaration has been seen,
+ or a declaration that appeared in an inner scope that has ended. */
+#define C_DECL_INVISIBLE(EXP) DECL_LANG_FLAG_3 (EXP)
+
+/* Nonzero for a decl which either doesn't exist or isn't a prototype.
+ N.B. Could be simplified if all built-in decls had complete prototypes
+ (but this is presently difficult because some of them need FILE*). */
+#define C_DECL_ISNT_PROTOTYPE(EXP) \
+ (EXP == 0 \
+ || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
+ && !DECL_BUILT_IN (EXP)))
+
+/* Nonzero for a decl which is at file scope. */
+#define C_DECL_FILE_SCOPE(EXP) \
+ (! DECL_CONTEXT (EXP) \
+ || TREE_CODE (DECL_CONTEXT (EXP)) == TRANSLATION_UNIT_DECL)
/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
TYPE_ARG_TYPES for functions with prototypes, but created for functions
\f
/* in c-lang.c and objc-act.c */
-extern tree lookup_interface PARAMS ((tree));
-extern tree is_class_name PARAMS ((tree));
-extern void maybe_objc_check_decl PARAMS ((tree));
-extern void finish_file PARAMS ((void));
-extern int maybe_objc_comptypes PARAMS ((tree, tree, int));
-extern tree maybe_building_objc_message_expr PARAMS ((void));
-extern int recognize_objc_keyword PARAMS ((void));
-extern tree lookup_objc_ivar PARAMS ((tree));
+extern tree lookup_interface (tree);
+extern tree is_class_name (tree);
+extern tree objc_is_id (tree);
+extern void objc_check_decl (tree);
+extern int objc_comptypes (tree, tree, int);
+extern tree objc_message_selector (void);
+extern tree lookup_objc_ivar (tree);
+extern void c_expand_body (tree);
\f
/* in c-parse.in */
-extern void c_parse_init PARAMS ((void));
-extern void c_set_yydebug PARAMS ((int));
+extern void c_parse_init (void);
/* in c-aux-info.c */
-extern void gen_aux_info_record PARAMS ((tree, int, int, int));
+extern void gen_aux_info_record (tree, int, int, int);
/* in c-decl.c */
-extern int global_bindings_p PARAMS ((void));
-extern int kept_level_p PARAMS ((void));
-extern tree getdecls PARAMS ((void));
-extern void pushlevel PARAMS ((int));
-extern tree poplevel PARAMS ((int,int, int));
-extern void insert_block PARAMS ((tree));
-extern void set_block PARAMS ((tree));
-extern tree pushdecl PARAMS ((tree));
-
-extern void c_insert_default_attributes PARAMS ((tree));
-extern void c_init_decl_processing PARAMS ((void));
-extern void c_dup_lang_specific_decl PARAMS ((tree));
-extern void c_print_identifier PARAMS ((FILE *, tree, int));
-extern void c_mark_tree PARAMS ((tree));
-extern tree build_array_declarator PARAMS ((tree, tree, int, int));
-extern tree build_enumerator PARAMS ((tree, tree));
-extern int c_decode_option PARAMS ((int, char **));
-extern void c_mark_varargs PARAMS ((void));
-extern void check_for_loop_decls PARAMS ((void));
-extern void clear_parm_order PARAMS ((void));
-extern int complete_array_type PARAMS ((tree, tree, int));
-extern void declare_parm_level PARAMS ((int));
-extern tree define_label PARAMS ((const char *, int,
- tree));
-extern void finish_decl PARAMS ((tree, tree, tree));
-extern tree finish_enum PARAMS ((tree, tree, tree));
-extern void finish_function PARAMS ((int, int));
-extern tree finish_struct PARAMS ((tree, tree, tree));
-extern tree get_parm_info PARAMS ((int));
-extern tree grokfield PARAMS ((const char *, int, tree, tree, tree));
-extern tree groktypename PARAMS ((tree));
-extern tree groktypename_in_parm_context PARAMS ((tree));
-extern tree implicitly_declare PARAMS ((tree));
-extern void implicit_decl_warning PARAMS ((tree));
-extern int in_parm_level_p PARAMS ((void));
-extern void keep_next_level PARAMS ((void));
-extern tree lookup_name PARAMS ((tree));
-extern tree lookup_name_current_level PARAMS ((tree));
-extern void parmlist_tags_warning PARAMS ((void));
-extern void pending_xref_error PARAMS ((void));
-extern void mark_c_function_context PARAMS ((struct function *));
-extern void push_c_function_context PARAMS ((struct function *));
-extern void pop_c_function_context PARAMS ((struct function *));
-extern void pop_label_level PARAMS ((void));
-extern void push_label_level PARAMS ((void));
-extern void push_parm_decl PARAMS ((tree));
-extern tree pushdecl_top_level PARAMS ((tree));
-extern void pushtag PARAMS ((tree, tree));
-extern tree set_array_declarator_type PARAMS ((tree, tree, int));
-extern tree shadow_label PARAMS ((tree));
-extern void shadow_tag PARAMS ((tree));
-extern void shadow_tag_warned PARAMS ((tree, int));
-extern tree start_enum PARAMS ((tree));
-extern int start_function PARAMS ((tree, tree, tree));
-extern tree start_decl PARAMS ((tree, tree, int,
- tree));
-extern tree start_struct PARAMS ((enum tree_code, tree));
-extern void store_parm_decls PARAMS ((void));
-extern tree xref_tag PARAMS ((enum tree_code, tree));
-extern tree c_begin_compound_stmt PARAMS ((void));
-extern void c_expand_deferred_function PARAMS ((tree));
-extern void c_expand_decl_stmt PARAMS ((tree));
-
+extern int global_bindings_p (void);
+extern int kept_level_p (void);
+extern tree getdecls (void);
+extern void pushlevel (int);
+extern void insert_block (tree);
+extern void set_block (tree);
+extern tree pushdecl (tree);
+
+extern void c_insert_default_attributes (tree);
+extern void c_init_decl_processing (void);
+extern void c_dup_lang_specific_decl (tree);
+extern void c_print_identifier (FILE *, tree, int);
+extern tree build_array_declarator (tree, tree, int, int);
+extern tree build_enumerator (tree, tree);
+extern void check_for_loop_decls (void);
+extern void clear_parm_order (void);
+extern int complete_array_type (tree, tree, int);
+extern void declare_parm_level (void);
+extern tree define_label (location_t, tree);
+extern void finish_decl (tree, tree, tree);
+extern tree finish_enum (tree, tree, tree);
+extern void finish_function (int, int);
+extern tree finish_struct (tree, tree, tree);
+extern tree get_parm_info (int);
+extern tree grokfield (tree, tree, tree);
+extern tree groktypename (tree);
+extern tree groktypename_in_parm_context (tree);
+extern tree implicitly_declare (tree);
+extern int in_parm_level_p (void);
+extern void keep_next_level (void);
+extern tree lookup_name (tree);
+extern void parmlist_tags_warning (void);
+extern void pending_xref_error (void);
+extern void c_push_function_context (struct function *);
+extern void c_pop_function_context (struct function *);
+extern void pop_label_level (void);
+extern void push_label_level (void);
+extern void push_parm_decl (tree);
+extern tree pushdecl_top_level (tree);
+extern tree pushdecl_function_level (tree, tree);
+extern void pushtag (tree, tree);
+extern tree set_array_declarator_type (tree, tree, int);
+extern tree shadow_label (tree);
+extern void shadow_tag (tree);
+extern void shadow_tag_warned (tree, int);
+extern tree start_enum (tree);
+extern int start_function (tree, tree, tree);
+extern tree start_decl (tree, tree, int, tree);
+extern tree start_struct (enum tree_code, tree);
+extern void store_parm_decls (void);
+extern tree xref_tag (enum tree_code, tree);
+extern tree c_begin_compound_stmt (void);
+extern void c_expand_deferred_function (tree);
+extern void c_expand_decl_stmt (tree);
+extern tree make_pointer_declarator (tree, tree);
+extern void merge_translation_unit_decls (void);
/* in c-objc-common.c */
-extern int c_disregard_inline_limits PARAMS ((tree));
-extern int c_cannot_inline_tree_fn PARAMS ((tree *));
-extern const char *c_objc_common_init PARAMS ((const char *));
-extern int c_missing_noreturn_ok_p PARAMS ((tree));
-extern void c_objc_common_finish_file PARAMS ((void));
-extern int defer_fn PARAMS ((tree));
+extern int c_disregard_inline_limits (tree);
+extern int c_cannot_inline_tree_fn (tree *);
+extern bool c_objc_common_init (void);
+extern int c_missing_noreturn_ok_p (tree);
+extern void c_objc_common_finish_file (void);
+extern int defer_fn (tree);
+extern bool c_warn_unused_global_decl (tree);
#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
c_build_qualified_type ((TYPE), \
((CONST_P) ? TYPE_QUAL_CONST : 0) | \
((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
+#define c_sizeof_nowarn(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 0)
+
/* in c-typeck.c */
-extern tree require_complete_type PARAMS ((tree));
-extern int comptypes PARAMS ((tree, tree));
-extern tree c_sizeof_nowarn PARAMS ((tree));
-extern tree c_size_in_bytes PARAMS ((tree));
-extern tree build_component_ref PARAMS ((tree, tree));
-extern tree build_indirect_ref PARAMS ((tree, const char *));
-extern tree build_array_ref PARAMS ((tree, tree));
-extern tree build_external_ref PARAMS ((tree, int));
-extern tree parser_build_binary_op PARAMS ((enum tree_code,
- tree, tree));
-extern void readonly_warning PARAMS ((tree, const char *));
-extern tree build_conditional_expr PARAMS ((tree, tree, tree));
-extern tree build_compound_expr PARAMS ((tree));
-extern tree c_cast_expr PARAMS ((tree, tree));
-extern tree build_c_cast PARAMS ((tree, tree));
-extern tree build_modify_expr PARAMS ((tree, enum tree_code,
- tree));
-extern void store_init_value PARAMS ((tree, tree));
-extern void error_init PARAMS ((const char *));
-extern void pedwarn_init PARAMS ((const char *));
-extern void start_init PARAMS ((tree, tree, int));
-extern void finish_init PARAMS ((void));
-extern void really_start_incremental_init PARAMS ((tree));
-extern void push_init_level PARAMS ((int));
-extern tree pop_init_level PARAMS ((int));
-extern void set_init_index PARAMS ((tree, tree));
-extern void set_init_label PARAMS ((tree));
-extern void process_init_element PARAMS ((tree));
-extern tree build_compound_literal PARAMS ((tree, tree));
-extern void pedwarn_c99 PARAMS ((const char *, ...))
- ATTRIBUTE_PRINTF_1;
-extern tree c_start_case PARAMS ((tree));
-extern void c_finish_case PARAMS ((void));
-extern tree simple_asm_stmt PARAMS ((tree));
-extern tree build_asm_stmt PARAMS ((tree, tree, tree,
- tree, tree));
-extern tree c_convert_parm_for_inlining PARAMS ((tree, tree, tree));
+
+/* For use with comptypes. */
+enum {
+ COMPARE_STRICT = 0,
+ COMPARE_DIFFERENT_TU = 1
+};
+
+extern tree require_complete_type (tree);
+extern int comptypes (tree, tree, int);
+extern tree c_size_in_bytes (tree);
+extern bool c_mark_addressable (tree);
+extern void c_incomplete_type_error (tree, tree);
+extern tree c_type_promotes_to (tree);
+extern tree build_component_ref (tree, tree);
+extern tree build_indirect_ref (tree, const char *);
+extern tree build_array_ref (tree, tree);
+extern tree build_external_ref (tree, int);
+extern tree parser_build_binary_op (enum tree_code, tree, tree);
+extern int c_tree_expr_nonnegative_p (tree);
+extern void readonly_warning (tree, const char *);
+extern tree build_conditional_expr (tree, tree, tree);
+extern tree build_compound_expr (tree);
+extern tree c_cast_expr (tree, tree);
+extern tree build_c_cast (tree, tree);
+extern tree build_modify_expr (tree, enum tree_code, tree);
+extern void store_init_value (tree, tree);
+extern void error_init (const char *);
+extern void pedwarn_init (const char *);
+extern void start_init (tree, tree, int);
+extern void finish_init (void);
+extern void really_start_incremental_init (tree);
+extern void push_init_level (int);
+extern tree pop_init_level (int);
+extern void set_init_index (tree, tree);
+extern void set_init_label (tree);
+extern void process_init_element (tree);
+extern tree build_compound_literal (tree, tree);
+extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_PRINTF_1;
+extern tree c_start_case (tree);
+extern void c_finish_case (void);
+extern tree simple_asm_stmt (tree);
+extern tree build_asm_stmt (tree, tree, tree, tree, tree);
+extern tree c_convert_parm_for_inlining (tree, tree, tree);
/* Set to 0 at beginning of a function definition, set to 1 if
a return statement that specifies a return value is seen. */
extern int current_function_returns_abnormally;
-/* Nonzero means the expression being parsed will never be evaluated.
- This is a count, since unevaluated expressions can nest. */
-
-extern int skip_evaluation;
-
-/* Nonzero means `$' can be in an identifier. */
-
-extern int dollars_in_ident;
-
-/* Nonzero means allow type mismatches in conditional expressions;
- just make their values `void'. */
-
-extern int flag_cond_mismatch;
-
-/* Nonzero means don't recognize the keyword `asm'. */
-
-extern int flag_no_asm;
-
-/* Nonzero means warn about implicit declarations. */
-
-extern int warn_implicit;
-
-/* Nonzero means warn for all old-style non-prototype function decls. */
-
-extern int warn_strict_prototypes;
-
-/* Nonzero means warn about multiple (redundant) decls for the same single
- variable or function. */
-
-extern int warn_redundant_decls;
-
-/* Nonzero means warn about extern declarations of objects not at
- file-scope level and about *all* declarations of functions (whether
- extern or static) not at file-scope level. Note that we exclude
- implicit function declarations. To get warnings about those, use
- -Wimplicit. */
-
-extern int warn_nested_externs;
-
-/* Nonzero means warn about pointer casts that can drop a type qualifier
- from the pointer target type. */
-
-extern int warn_cast_qual;
-
-/* Nonzero means warn when casting a function call to a type that does
- not match the return type (e.g. (float)sqrt() or (anything*)malloc()
- when there is no previous declaration of sqrt or malloc. */
-
-extern int warn_bad_function_cast;
-
-/* Warn about traditional constructs whose meanings changed in ANSI C. */
-
-extern int warn_traditional;
-
-/* Warn about a subscript that has type char. */
-
-extern int warn_char_subscripts;
-
-/* Warn if main is suspicious. */
-
-extern int warn_main;
-
-/* Warn if initializer is not completely bracketed. */
-
-extern int warn_missing_braces;
-
-/* Warn about comparison of signed and unsigned values. */
-
-extern int warn_sign_compare;
-
-/* Warn about testing equality of floating point numbers. */
-
-extern int warn_float_equal;
-
-/* Warn about multicharacter constants. */
-
-extern int warn_multichar;
-
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
-/* Warn about implicit declarations. 1 = warning, 2 = error. */
-extern int mesg_implicit_function_declaration;
-
/* In c-decl.c */
-extern void c_finish_incomplete_decl PARAMS ((tree));
+extern void c_finish_incomplete_decl (tree);
+extern void c_write_global_declarations (void);
+
+extern GTY(()) tree static_ctors;
+extern GTY(()) tree static_dtors;
-extern tree static_ctors;
-extern tree static_dtors;
+/* In order for the format checking to accept the C frontend
+ diagnostic framework extensions, you must include this file before
+ toplev.h, not after. */
+#define GCC_DIAG_STYLE __gcc_cdiag__
#endif /* ! GCC_C_TREE_H */
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