/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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 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.
-GNU CC 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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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 _C_TREE_H
-#define _C_TREE_H
+#ifndef GCC_C_TREE_H
+#define GCC_C_TREE_H
#include "c-common.h"
/* 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. */
+ be referenced after they fall out of scope, so they can't be global.
-struct lang_identifier
+ 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 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)")))
{
- struct tree_identifier ignore;
- tree global_value, local_value, label_value, implicit_decl;
- tree error_locus, limbo_value;
+ 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. */
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. */
-/* Nonzero means reject anything that ANSI standard C forbids. */
-extern int pedantic;
-
/* 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)
+#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)
+#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)
+#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
+struct lang_type GTY(())
{
int len;
- tree elts[1];
+ tree GTY((length ("%h.len"))) elts[1];
};
-/* Mark which labels are explicitly declared.
- These may be shadowed, and may be referenced from nested functions. */
-#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
-
/* 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)
+#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)
+#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))
+#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))
+#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))
+#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_NONCOPIED_PARTS (NODE)
-
-/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
-#define DECL_C_BIT_FIELD(NODE) DECL_LANG_FLAG_4 (NODE)
+#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
-/* In a VAR_DECL, means the variable is really an iterator. */
-#define ITERATOR_P(D) (DECL_LANG_FLAG_4(D))
-
-/* In a VAR_DECL for an iterator, means we are within
- an explicit loop over that iterator. */
-#define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag)
\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 tree objc_is_id PARAMS ((tree));
+extern void 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 tree maybe_objc_method_name PARAMS ((tree));
-extern int recognize_objc_keyword PARAMS ((void));
-extern tree build_objc_string PARAMS ((int, const char *));
+extern int objc_comptypes PARAMS ((tree, tree, int));
+extern tree objc_message_selector PARAMS ((void));
extern tree lookup_objc_ivar PARAMS ((tree));
+extern void c_expand_body PARAMS ((tree));
+
\f
/* 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-common.c */
-extern unsigned int min_precision PARAMS ((tree, int));
-
-/* in c-convert.c */
-extern tree convert PARAMS ((tree, tree));
-
/* 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));
-/* Add qualifiers to a type, in the fashion for C. */
-extern tree c_build_qualified_type PARAMS ((tree, int));
-#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))
-extern int c_decode_option PARAMS ((int, char **));
-extern void c_mark_varargs PARAMS ((void));
-extern tree check_identifier PARAMS ((tree, tree));
+extern void check_for_loop_decls PARAMS ((void));
extern void clear_parm_order PARAMS ((void));
-extern tree combine_parm_decls PARAMS ((tree, tree, int));
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 delete_block PARAMS ((tree));
extern void finish_decl PARAMS ((tree, tree, tree));
-extern void finish_decl_top_level PARAMS ((tree, tree, tree));
extern tree finish_enum PARAMS ((tree, tree, tree));
-extern void finish_function PARAMS ((int));
+extern void finish_function PARAMS ((int, int));
extern tree finish_struct PARAMS ((tree, tree, tree));
extern tree get_parm_info PARAMS ((int));
-extern tree getdecls PARAMS ((void));
-extern tree gettags PARAMS ((void));
-extern int global_bindings_p PARAMS ((void));
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 init_decl_processing PARAMS ((void));
-extern void insert_block PARAMS ((tree));
extern void keep_next_level PARAMS ((void));
-extern int kept_level_p PARAMS ((void));
-extern tree lookup_label PARAMS ((tree));
extern tree lookup_name PARAMS ((tree));
extern tree lookup_name_current_level PARAMS ((tree));
-extern tree lookup_name_current_level_global PARAMS ((tree));
-extern tree maybe_build_cleanup 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 c_push_function_context PARAMS ((struct function *));
+extern void c_pop_function_context PARAMS ((struct function *));
extern void pop_label_level PARAMS ((void));
-extern tree poplevel PARAMS ((int, int, int));
-extern void print_lang_decl PARAMS ((FILE *, tree, int));
-extern void print_lang_identifier PARAMS ((FILE *, tree, int));
-extern void print_lang_type PARAMS ((FILE *, tree, int));
extern void push_label_level PARAMS ((void));
extern void push_parm_decl PARAMS ((tree));
-extern tree pushdecl PARAMS ((tree));
extern tree pushdecl_top_level PARAMS ((tree));
-extern void pushlevel PARAMS ((int));
extern void pushtag PARAMS ((tree, tree));
-extern void set_block PARAMS ((tree));
+extern void record_function_scope_shadow PARAMS ((tree));
+extern tree set_array_declarator_type PARAMS ((tree, tree, int));
extern tree shadow_label PARAMS ((tree));
-extern void shadow_record_fields 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,
- tree));
+extern int start_function PARAMS ((tree, tree, tree));
extern tree start_decl PARAMS ((tree, tree, int,
- tree, tree));
+ 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 bool c_objc_common_init PARAMS ((void));
+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 void incomplete_type_error PARAMS ((tree, tree));
extern int comptypes PARAMS ((tree, tree));
-extern tree c_sizeof PARAMS ((tree));
-extern tree c_sizeof_nowarn PARAMS ((tree));
extern tree c_size_in_bytes PARAMS ((tree));
-extern tree c_alignof PARAMS ((tree));
-extern tree c_alignof_expr 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 build_function_call PARAMS ((tree, tree));
extern tree parser_build_binary_op PARAMS ((enum tree_code,
tree, tree));
-extern int lvalue_or_else PARAMS ((tree, const char *));
+extern int c_tree_expr_nonnegative_p PARAMS ((tree));
extern void readonly_warning PARAMS ((tree, const char *));
-extern int mark_addressable PARAMS ((tree));
extern tree build_conditional_expr PARAMS ((tree, tree, tree));
extern tree build_compound_expr PARAMS ((tree));
-extern tree build_c_cast PARAMS ((tree, 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 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;
-
-/* in c-iterate.c */
-extern void init_iterators PARAMS ((void));
-extern void iterator_expand PARAMS ((tree));
-extern void iterator_for_loop_start PARAMS ((tree));
-extern void iterator_for_loop_end PARAMS ((tree));
-extern void iterator_for_loop_record PARAMS ((tree));
-extern void push_iterator_stack PARAMS ((void));
-extern void pop_iterator_stack PARAMS ((void));
+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_null;
-/* 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 environment is hosted (i.e., not freestanding) */
-
-extern int flag_hosted;
-
-/* Nonzero means warn about implicit declarations. */
-
-extern int warn_implicit;
-
-/* Nonzero means warn about sizeof (function) or addition/subtraction
- of function pointers. */
-
-extern int warn_pointer_arith;
-
-/* 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 functions which might be candidates for attribute noreturn. */
-
-extern int warn_missing_noreturn;
-
-/* 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;
-
-/* Nonzero means to allow single precision math even if we're generally
- being traditional. */
-extern int flag_allow_single_precision;
-
-/* 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;
-
-/* Warn about long long. */
+/* Set to 0 at beginning of a function definition, set to 1 if
+ a call to a noreturn function is seen. */
-extern int warn_long_long;
+extern int current_function_returns_abnormally;
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
-/* Nonzero enables objc features. */
-
-#define doing_objc_thang \
- (c_language == clk_objective_c)
-
/* In c-decl.c */
-extern void finish_incomplete_decl PARAMS ((tree));
+extern void c_finish_incomplete_decl PARAMS ((tree));
+
+extern GTY(()) tree static_ctors;
+extern GTY(()) tree static_dtors;
-#endif /* not _C_TREE_H */
+#endif /* ! GCC_C_TREE_H */
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