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/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef GCC_C_TREE_H
#define GCC_C_TREE_H
#include "c-common.h"
/* Language-dependent contents of an identifier. */
/* The limbo_value is used for block level extern declarations, which need
to be type checked against subsequent extern declarations. They can't
be referenced after they fall out of scope, so they can't be global.
The rid_code field is used for keywords. It is in all
lang_identifier nodes, because some keywords are only special in a
particular context. */
struct lang_identifier GTY(())
{
struct c_common_identifier common_id;
tree global_value;
tree local_value;
tree label_value;
tree implicit_decl;
tree error_locus;
tree limbo_value;
};
/* The resulting tree type. */
union lang_tree_node
GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
chain_next ("(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 GTY(())
{
struct c_lang_decl base;
/* The return types and parameter types may have variable size.
This is a list of any SAVE_EXPRs that need to be evaluated to
compute those sizes. */
tree pending_sizes;
};
/* 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. */
#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.
TREE_USED to record that such a decl was used.
TREE_ADDRESSABLE to record that the address of such a decl was used. */
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
nonzero if the definition of the type has already started. */
#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
and C_RID_YYCODE is the token number wanted by Yacc. */
#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
/* This function was declared inline. This flag controls the linkage
semantics of 'inline'; whether or not the function is inlined is
controlled by DECL_INLINE. */
#define DECL_DECLARED_INLINE_P(NODE) \
(DECL_LANG_SPECIFIC (NODE)->base.declared_inline)
/* In a RECORD_TYPE, a sorted array of the fields of the type. */
struct lang_type GTY(())
{
int len;
tree GTY((length ("%h.len"))) elts[1];
};
/* Record whether a type or decl was written with nonconstant size.
Note that TYPE_SIZE may have simplified to a constant. */
#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))
/* Record whether a typedef for type `int' was actually `signed int'. */
#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
/* For a FUNCTION_DECL, nonzero if it was defined without an explicit
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 FUNCTION_TYPE, a hidden list of types of arguments. The same as
TYPE_ARG_TYPES for functions with prototypes, but created for functions
without prototypes. */
#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
/* in c-lang.c and objc-act.c */
extern tree lookup_interface PARAMS ((tree));
extern tree is_class_name PARAMS ((tree));
extern tree objc_is_id PARAMS ((tree));
extern void objc_check_decl PARAMS ((tree));
extern void finish_file PARAMS ((void));
extern int objc_comptypes PARAMS ((tree, tree, int));
extern tree objc_message_selector PARAMS ((void));
extern tree lookup_objc_ivar PARAMS ((tree));
/* in c-parse.in */
extern void c_parse_init PARAMS ((void));
/* in c-aux-info.c */
extern void gen_aux_info_record PARAMS ((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 tree build_array_declarator PARAMS ((tree, tree, int, int));
extern tree build_enumerator PARAMS ((tree, tree));
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 c_push_function_context PARAMS ((struct function *));
extern void c_pop_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 tree make_pointer_declarator PARAMS ((tree, tree));
/* 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 bool c_warn_unused_global_decl PARAMS ((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_size_in_bytes PARAMS ((tree));
extern bool c_mark_addressable PARAMS ((tree));
extern void c_incomplete_type_error PARAMS ((tree, tree));
extern tree c_type_promotes_to 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 int c_tree_expr_nonnegative_p PARAMS ((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));
/* 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_value;
/* Set to 0 at beginning of a function definition, set to 1 if
a return statement with no argument is seen. */
extern int current_function_returns_null;
/* Set to 0 at beginning of a function definition, set to 1 if
a call to a noreturn function is seen. */
extern int current_function_returns_abnormally;
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
/* In c-decl.c */
extern void c_finish_incomplete_decl PARAMS ((tree));
extern GTY(()) tree static_ctors;
extern GTY(()) tree static_dtors;
#endif /* ! GCC_C_TREE_H */
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