331 lines
12 KiB
C
331 lines
12 KiB
C
/* Definitions for C parsing and type checking.
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Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
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1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef GCC_C_TREE_H
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#define GCC_C_TREE_H
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#include "c-common.h"
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/* Language-dependent contents of an identifier. */
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/* The limbo_value is used for block level extern declarations, which need
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to be type checked against subsequent extern declarations. They can't
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be referenced after they fall out of scope, so they can't be global.
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The rid_code field is used for keywords. It is in all
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lang_identifier nodes, because some keywords are only special in a
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particular context. */
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struct lang_identifier GTY(())
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{
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struct c_common_identifier common_id;
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tree symbol_value;
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tree tag_value;
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tree label_value;
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};
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/* The resulting tree type. */
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union lang_tree_node
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GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
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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)")))
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{
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union tree_node GTY ((tag ("0"),
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desc ("tree_node_structure (&%h)")))
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generic;
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struct lang_identifier GTY ((tag ("1"))) identifier;
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};
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/* Language-specific declaration information. */
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struct lang_decl GTY(())
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{
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/* The return types and parameter types may have variable size.
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This is a list of any SAVE_EXPRs that need to be evaluated to
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compute those sizes. */
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tree pending_sizes;
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};
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/* Macros for access to language-specific slots in an identifier. */
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/* Each of these slots contains a DECL node or null. */
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/* The value of the identifier in the namespace of "ordinary identifiers"
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(data objects, enum constants, functions, typedefs). */
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#define IDENTIFIER_SYMBOL_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->symbol_value)
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/* The value of the identifier in the namespace of struct, union,
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and enum tags. */
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#define IDENTIFIER_TAG_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->tag_value)
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/* The value of the identifier in the namespace of labels. */
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#define IDENTIFIER_LABEL_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->label_value)
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/* In identifiers, C uses the following fields in a special way:
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TREE_PUBLIC to record that there was a previous local extern decl.
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TREE_USED to record that such a decl was used.
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TREE_ADDRESSABLE to record that the address of such a decl was used. */
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/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
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#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
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/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
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#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
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/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
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nonzero if the definition of the type has already started. */
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#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
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/* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
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declarations whose type would be completed by completing that type. */
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#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
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/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
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keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
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and C_RID_YYCODE is the token number wanted by Yacc. */
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#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
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/* In a RECORD_TYPE, a sorted array of the fields of the type. */
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struct lang_type GTY(())
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{
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struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
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};
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/* Record whether a type or decl was written with nonconstant size.
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Note that TYPE_SIZE may have simplified to a constant. */
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#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
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#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
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/* Store a value in that field. */
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#define C_SET_EXP_ORIGINAL_CODE(EXP, CODE) \
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(TREE_COMPLEXITY (EXP) = (int) (CODE))
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/* Record whether a typedef for type `int' was actually `signed int'. */
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#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
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/* For a FUNCTION_DECL, nonzero if it was defined without an explicit
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return type. */
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#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
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/* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
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#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
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/* Nonzero for a declaration of an external object which is not
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currently in scope. This is either a built-in declaration of
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a library function, before a real declaration has been seen,
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or a declaration that appeared in an inner scope that has ended. */
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#define C_DECL_INVISIBLE(EXP) DECL_LANG_FLAG_3 (EXP)
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/* Nonzero for a decl which either doesn't exist or isn't a prototype.
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N.B. Could be simplified if all built-in decls had complete prototypes
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(but this is presently difficult because some of them need FILE*). */
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#define C_DECL_ISNT_PROTOTYPE(EXP) \
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(EXP == 0 \
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|| (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
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&& !DECL_BUILT_IN (EXP)))
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/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
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TYPE_ARG_TYPES for functions with prototypes, but created for functions
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without prototypes. */
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#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
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/* Values for the first parameter to poplevel. */
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#define KEEP_NO 0
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#define KEEP_YES 1
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#define KEEP_MAYBE 2
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/* Save and restore the variables in this file and elsewhere
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that keep track of the progress of compilation of the current function.
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Used for nested functions. */
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struct language_function GTY(())
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{
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struct c_language_function base;
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int returns_value;
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int returns_null;
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int returns_abnormally;
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int warn_about_return_type;
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int extern_inline;
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int x_in_iteration_stmt;
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int x_in_case_stmt;
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};
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/* in c-parse.in */
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extern void c_parse_init (void);
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/* in c-aux-info.c */
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extern void gen_aux_info_record (tree, int, int, int);
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/* in c-decl.c */
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extern int c_in_iteration_stmt;
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extern int c_in_case_stmt;
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extern int global_bindings_p (void);
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extern tree getdecls (void);
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extern void pushlevel (int);
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extern void insert_block (tree);
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extern void set_block (tree);
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extern tree pushdecl (tree);
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extern void c_expand_body (tree);
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extern void c_init_decl_processing (void);
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extern void c_dup_lang_specific_decl (tree);
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extern void c_print_identifier (FILE *, tree, int);
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extern tree build_array_declarator (tree, tree, int, int);
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extern tree build_enumerator (tree, tree);
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extern void check_for_loop_decls (void);
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extern void mark_forward_parm_decls (void);
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extern int complete_array_type (tree, tree, int);
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extern void declare_parm_level (void);
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extern void undeclared_variable (tree);
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extern tree declare_label (tree);
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extern tree define_label (location_t, tree);
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extern void finish_decl (tree, tree, tree);
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extern tree finish_enum (tree, tree, tree);
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extern void finish_function (void);
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extern tree finish_struct (tree, tree, tree);
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extern tree get_parm_info (int);
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extern tree grokfield (tree, tree, tree);
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extern tree groktypename (tree);
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extern tree groktypename_in_parm_context (tree);
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extern tree implicitly_declare (tree);
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extern int in_parm_level_p (void);
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extern void keep_next_level (void);
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extern tree lookup_name (tree);
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extern void pending_xref_error (void);
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extern void c_push_function_context (struct function *);
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extern void c_pop_function_context (struct function *);
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extern void push_parm_decl (tree);
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extern tree pushdecl_top_level (tree);
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extern void pushtag (tree, tree);
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extern tree set_array_declarator_type (tree, tree, int);
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extern void shadow_tag (tree);
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extern void shadow_tag_warned (tree, int);
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extern tree start_enum (tree);
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extern int start_function (tree, tree, tree);
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extern tree start_decl (tree, tree, int, tree);
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extern tree start_struct (enum tree_code, tree);
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extern void store_parm_decls (void);
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extern tree xref_tag (enum tree_code, tree);
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extern tree c_begin_compound_stmt (void);
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extern void c_expand_deferred_function (tree);
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extern void c_expand_decl_stmt (tree);
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extern void c_static_assembler_name (tree);
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extern tree make_pointer_declarator (tree, tree);
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extern void merge_translation_unit_decls (void);
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/* in c-objc-common.c */
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extern int c_disregard_inline_limits (tree);
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extern int c_cannot_inline_tree_fn (tree *);
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extern bool c_objc_common_init (void);
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extern int c_missing_noreturn_ok_p (tree);
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extern void c_objc_common_finish_file (void);
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extern int defer_fn (tree);
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extern bool c_warn_unused_global_decl (tree);
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#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
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c_build_qualified_type ((TYPE), \
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((CONST_P) ? TYPE_QUAL_CONST : 0) | \
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((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
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#define c_sizeof_nowarn(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 0)
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/* in c-typeck.c */
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/* For use with comptypes. */
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enum {
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COMPARE_STRICT = 0
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};
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extern tree require_complete_type (tree);
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extern int comptypes (tree, tree, int);
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extern tree c_size_in_bytes (tree);
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extern bool c_mark_addressable (tree);
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extern void c_incomplete_type_error (tree, tree);
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extern tree c_type_promotes_to (tree);
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extern tree build_component_ref (tree, tree);
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extern tree build_indirect_ref (tree, const char *);
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extern tree build_array_ref (tree, tree);
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extern tree build_external_ref (tree, int);
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extern tree parser_build_binary_op (enum tree_code, tree, tree);
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extern int c_tree_expr_nonnegative_p (tree);
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extern void readonly_error (tree, const char *);
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extern tree build_conditional_expr (tree, tree, tree);
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extern tree build_compound_expr (tree);
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extern tree c_cast_expr (tree, tree);
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extern tree build_c_cast (tree, tree);
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extern tree build_modify_expr (tree, enum tree_code, tree);
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extern void store_init_value (tree, tree);
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extern void error_init (const char *);
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extern void pedwarn_init (const char *);
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extern void start_init (tree, tree, int);
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extern void finish_init (void);
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extern void really_start_incremental_init (tree);
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extern void push_init_level (int);
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extern tree pop_init_level (int);
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extern void set_init_index (tree, tree);
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extern void set_init_label (tree);
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extern void process_init_element (tree);
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extern tree build_compound_literal (tree, tree);
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extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_PRINTF_1;
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extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_PRINTF_1;
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extern tree c_start_case (tree);
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extern void c_finish_case (void);
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extern tree simple_asm_stmt (tree);
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extern tree build_asm_stmt (tree, tree, tree, tree, tree);
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extern tree c_convert_parm_for_inlining (tree, tree, tree, int);
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/* Set to 0 at beginning of a function definition, set to 1 if
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a return statement that specifies a return value is seen. */
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extern int current_function_returns_value;
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/* Set to 0 at beginning of a function definition, set to 1 if
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a return statement with no argument is seen. */
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extern int current_function_returns_null;
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/* Set to 0 at beginning of a function definition, set to 1 if
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a call to a noreturn function is seen. */
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extern int current_function_returns_abnormally;
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/* Nonzero means we are reading code that came from a system header file. */
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extern int system_header_p;
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/* In c-decl.c */
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extern void c_finish_incomplete_decl (tree);
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extern void *get_current_scope (void);
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extern void objc_mark_locals_volatile (void *);
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extern void c_write_global_declarations (void);
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extern GTY(()) tree static_ctors;
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extern GTY(()) tree static_dtors;
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/* In order for the format checking to accept the C frontend
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diagnostic framework extensions, you must include this file before
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toplev.h, not after. */
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#define GCC_DIAG_STYLE __gcc_cdiag__
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#endif /* ! GCC_C_TREE_H */
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