378 lines
15 KiB
C
378 lines
15 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 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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/* $FreeBSD$ */
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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
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{
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struct c_common_identifier ignore;
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tree global_value, local_value, label_value, implicit_decl;
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tree error_locus, limbo_value;
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};
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/* Language-specific declaration information. */
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struct lang_decl
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{
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struct c_lang_decl base;
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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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/* This represents the value which the identifier has in the
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file-scope namespace. */
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#define IDENTIFIER_GLOBAL_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->global_value)
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/* This represents the value which the identifier has in the current
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scope. */
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#define IDENTIFIER_LOCAL_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->local_value)
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/* This represents the value which the identifier has as a label in
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the current label scope. */
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#define IDENTIFIER_LABEL_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->label_value)
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/* This records the extern decl of this identifier, if it has had one
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at any point in this compilation. */
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#define IDENTIFIER_LIMBO_VALUE(NODE) \
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(((struct lang_identifier *) (NODE))->limbo_value)
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/* This records the implicit function decl of this identifier, if it
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has had one at any point in this compilation. */
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#define IDENTIFIER_IMPLICIT_DECL(NODE) \
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(((struct lang_identifier *) (NODE))->implicit_decl)
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/* This is the last function in which we printed an "undefined variable"
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message for this identifier. Value is a FUNCTION_DECL or null. */
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#define IDENTIFIER_ERROR_LOCUS(NODE) \
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(((struct lang_identifier *) (NODE))->error_locus)
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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 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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/* This function was declared inline. This flag controls the linkage
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semantics of 'inline'; whether or not the function is inlined is
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controlled by DECL_INLINE. */
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#define DECL_DECLARED_INLINE_P(NODE) \
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(DECL_LANG_SPECIFIC (NODE)->base.declared_inline)
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/* In a RECORD_TYPE, a sorted array of the fields of the type. */
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struct lang_type
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{
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int len;
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tree elts[1];
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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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#if 0 /* Not used. */
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/* Record whether a decl for a function or function pointer has
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already been mentioned (in a warning) because it was called
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but didn't have a prototype. */
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#define C_MISSING_PROTOTYPE_WARNED(DECL) DECL_LANG_FLAG_2 (DECL)
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#endif
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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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/* Nonzero for a declaration of a built in function if there has been no
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occasion that would declare the function in ordinary C.
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Using the function draws a pedantic warning in this case. */
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#define C_DECL_ANTICIPATED(EXP) DECL_LANG_FLAG_3 (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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/* in c-lang.c and objc-act.c */
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extern tree lookup_interface PARAMS ((tree));
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extern tree is_class_name PARAMS ((tree));
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extern void maybe_objc_check_decl PARAMS ((tree));
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extern void finish_file PARAMS ((void));
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extern int maybe_objc_comptypes PARAMS ((tree, tree, int));
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extern tree maybe_building_objc_message_expr PARAMS ((void));
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extern int recognize_objc_keyword PARAMS ((void));
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extern tree lookup_objc_ivar PARAMS ((tree));
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/* in c-parse.in */
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extern void c_parse_init PARAMS ((void));
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extern void c_set_yydebug PARAMS ((int));
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extern int yyparse_1 PARAMS ((void));
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/* in c-aux-info.c */
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extern void gen_aux_info_record PARAMS ((tree, int, int, int));
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/* in c-decl.c */
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extern void c_init_decl_processing PARAMS ((void));
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extern void c_print_identifier PARAMS ((FILE *, tree, int));
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extern tree build_array_declarator PARAMS ((tree, tree, int, int));
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extern tree build_enumerator PARAMS ((tree, tree));
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extern int c_decode_option PARAMS ((int, char **));
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extern void c_mark_varargs PARAMS ((void));
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extern void check_for_loop_decls PARAMS ((void));
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extern void clear_parm_order PARAMS ((void));
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extern int complete_array_type PARAMS ((tree, tree, int));
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extern void declare_parm_level PARAMS ((int));
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extern tree define_label PARAMS ((const char *, int,
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tree));
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extern void finish_decl PARAMS ((tree, tree, tree));
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extern tree finish_enum PARAMS ((tree, tree, tree));
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extern void finish_function PARAMS ((int));
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extern tree finish_struct PARAMS ((tree, tree, tree));
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extern tree get_parm_info PARAMS ((int));
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extern tree grokfield PARAMS ((const char *, int, tree, tree, tree));
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extern tree groktypename PARAMS ((tree));
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extern tree groktypename_in_parm_context PARAMS ((tree));
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extern tree implicitly_declare PARAMS ((tree));
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extern void implicit_decl_warning PARAMS ((tree));
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extern int in_parm_level_p PARAMS ((void));
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extern void keep_next_level PARAMS ((void));
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extern int kept_level_p PARAMS ((void));
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extern tree lookup_name PARAMS ((tree));
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extern tree lookup_name_current_level PARAMS ((tree));
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extern void parmlist_tags_warning PARAMS ((void));
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extern void pending_xref_error PARAMS ((void));
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extern void mark_c_function_context PARAMS ((struct function *));
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extern void push_c_function_context PARAMS ((struct function *));
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extern void pop_c_function_context PARAMS ((struct function *));
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extern void pop_label_level PARAMS ((void));
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extern void push_label_level PARAMS ((void));
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extern void push_parm_decl PARAMS ((tree));
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extern tree pushdecl_top_level PARAMS ((tree));
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extern void pushtag PARAMS ((tree, tree));
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extern tree set_array_declarator_type PARAMS ((tree, tree, int));
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extern tree shadow_label PARAMS ((tree));
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extern void shadow_tag PARAMS ((tree));
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extern void shadow_tag_warned PARAMS ((tree, int));
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extern tree start_enum PARAMS ((tree));
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extern int start_function PARAMS ((tree, tree, tree));
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extern tree start_decl PARAMS ((tree, tree, int,
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tree));
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extern tree start_struct PARAMS ((enum tree_code, tree));
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extern void store_parm_decls PARAMS ((void));
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extern tree xref_tag PARAMS ((enum tree_code, tree));
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extern tree c_begin_compound_stmt PARAMS ((void));
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extern void c_expand_deferred_function PARAMS ((tree));
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extern void c_expand_decl_stmt PARAMS ((tree));
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/* in c-objc-common.c */
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extern int c_disregard_inline_limits PARAMS ((tree));
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extern int c_cannot_inline_tree_fn PARAMS ((tree *));
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extern const char *c_objc_common_init PARAMS ((const char *));
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extern int c_missing_noreturn_ok_p PARAMS ((tree));
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extern void c_objc_common_finish_file PARAMS ((void));
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extern int defer_fn PARAMS ((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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/* in c-typeck.c */
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extern tree require_complete_type PARAMS ((tree));
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extern int comptypes PARAMS ((tree, tree));
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extern tree c_sizeof_nowarn PARAMS ((tree));
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extern tree c_size_in_bytes PARAMS ((tree));
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extern tree build_component_ref PARAMS ((tree, tree));
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extern tree build_indirect_ref PARAMS ((tree, const char *));
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extern tree build_array_ref PARAMS ((tree, tree));
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extern tree build_external_ref PARAMS ((tree, int));
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extern tree parser_build_binary_op PARAMS ((enum tree_code,
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tree, tree));
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extern void readonly_warning PARAMS ((tree, const char *));
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extern tree build_conditional_expr PARAMS ((tree, tree, tree));
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extern tree build_compound_expr PARAMS ((tree));
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extern tree c_cast_expr PARAMS ((tree, tree));
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extern tree build_c_cast PARAMS ((tree, tree));
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extern tree build_modify_expr PARAMS ((tree, enum tree_code,
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tree));
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extern void store_init_value PARAMS ((tree, tree));
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extern void error_init PARAMS ((const char *));
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extern void pedwarn_init PARAMS ((const char *));
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extern void start_init PARAMS ((tree, tree, int));
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extern void finish_init PARAMS ((void));
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extern void really_start_incremental_init PARAMS ((tree));
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extern void push_init_level PARAMS ((int));
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extern tree pop_init_level PARAMS ((int));
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extern void set_init_index PARAMS ((tree, tree));
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extern void set_init_label PARAMS ((tree));
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extern void process_init_element PARAMS ((tree));
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extern tree build_compound_literal PARAMS ((tree, tree));
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extern void pedwarn_c99 PARAMS ((const char *, ...))
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ATTRIBUTE_PRINTF_1;
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extern tree c_start_case PARAMS ((tree));
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extern void c_finish_case PARAMS ((void));
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extern tree simple_asm_stmt PARAMS ((tree));
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extern tree build_asm_stmt PARAMS ((tree, tree, tree,
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tree, tree));
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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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/* Nonzero means the expression being parsed will never be evaluated.
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This is a count, since unevaluated expressions can nest. */
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extern int skip_evaluation;
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/* Nonzero means `$' can be in an identifier. */
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extern int dollars_in_ident;
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/* Nonzero means allow type mismatches in conditional expressions;
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just make their values `void'. */
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extern int flag_cond_mismatch;
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/* Nonzero means don't recognize the keyword `asm'. */
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extern int flag_no_asm;
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/* Nonzero means warn about implicit declarations. */
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extern int warn_implicit;
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/* Nonzero means warn for all old-style non-prototype function decls. */
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extern int warn_strict_prototypes;
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/* Nonzero means warn about multiple (redundant) decls for the same single
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variable or function. */
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extern int warn_redundant_decls;
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/* Nonzero means warn about extern declarations of objects not at
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file-scope level and about *all* declarations of functions (whether
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extern or static) not at file-scope level. Note that we exclude
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implicit function declarations. To get warnings about those, use
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-Wimplicit. */
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extern int warn_nested_externs;
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/* Nonzero means warn about pointer casts that can drop a type qualifier
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from the pointer target type. */
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extern int warn_cast_qual;
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/* Nonzero means warn when casting a function call to a type that does
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not match the return type (e.g. (float)sqrt() or (anything*)malloc()
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when there is no previous declaration of sqrt or malloc. */
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extern int warn_bad_function_cast;
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/* Warn about traditional constructs whose meanings changed in ANSI C. */
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extern int warn_traditional;
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/* Warn about a subscript that has type char. */
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extern int warn_char_subscripts;
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/* Warn if main is suspicious. */
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extern int warn_main;
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/* Nonzero means to allow single precision math even if we're generally
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being traditional. */
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extern int flag_allow_single_precision;
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/* Warn if initializer is not completely bracketed. */
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extern int warn_missing_braces;
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/* Warn about comparison of signed and unsigned values. */
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extern int warn_sign_compare;
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/* Warn about testing equality of floating point numbers. */
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extern int warn_float_equal;
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/* Warn about multicharacter constants. */
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extern int warn_multichar;
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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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/* Warn about implicit declarations. 1 = warning, 2 = error. */
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extern int mesg_implicit_function_declaration;
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/* In c-decl.c */
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extern void finish_incomplete_decl PARAMS ((tree));
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extern tree static_ctors;
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extern tree static_dtors;
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#endif /* ! GCC_C_TREE_H */
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