/* Definitions for C parsing and type checking.
- Copyright (C) 1987 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
+ 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, 675 Mass Ave, Cambridge, MA 02139, 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 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
{
- struct tree_identifier ignore;
+ struct c_common_identifier ignore;
tree global_value, local_value, label_value, implicit_decl;
- tree error_locus;
+ tree error_locus, limbo_value;
+};
+
+/* Language-specific declaration information. */
+
+struct lang_decl
+{
+ 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)
+ (((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)
+ (((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)
+ (((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)
+ (((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)
+ (((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
tree 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)
-
-/* Record in each node resulting from a binary operator
- what operator was specified for it. */
-#define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
+#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)
/* 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)
-\f
-/* in c-typecheck.c */
-extern tree build_component_ref (), build_conditional_expr (), build_compound_expr ();
-extern tree build_unary_op (), build_binary_op (), build_function_call ();
-extern tree parser_build_binary_op ();
-extern tree build_indirect_ref (), build_array_ref (), build_c_cast ();
-extern tree build_modify_expr ();
-extern tree c_sizeof (), c_alignof (), c_alignof_expr ();
-extern void store_init_value ();
-extern tree digest_init ();
-extern tree c_expand_start_case ();
-extern tree default_conversion ();
-
-/* Given two integer or real types, return the type for their sum.
- Given two compatible ANSI C types, returns the merged type. */
-
-extern tree common_type ();
-
-/* in c-decl.c */
-extern tree build_label ();
-
-extern int start_function ();
-extern void finish_function ();
-extern void store_parm_decls ();
-extern tree get_parm_info ();
-extern tree combine_parm_decls ();
-
-extern void pushlevel ();
-extern tree poplevel ();
-
-extern tree groktypename (), lookup_name ();
-
-extern tree lookup_label (), define_label (), shadow_label ();
-
-extern tree implicitly_declare (), getdecls (), gettags ();
-
-extern tree start_decl ();
-extern void finish_decl ();
-
-extern tree start_struct (), finish_struct (), xref_tag ();
-extern tree grokfield ();
-
-extern tree start_enum (), finish_enum ();
-extern tree build_enumerator ();
-
-extern tree make_index_type ();
-
-/* Add qualifiers to a type, in the fashion for C. */
-extern tree c_build_type_variant ();
-
-/* Declare a predefined function. Return the declaration. */
-extern tree builtin_function ();
-
-/* Functions in c-common.c: */
+#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
-/* Concatenate a list of STRING_CST nodes into one STRING_CST. */
-extern tree combine_strings ();
-
-/* Validate the expression after `case' and apply default promotions. */
-extern tree check_case_value ();
-
-/* Print an error message for invalid operands to arith operation CODE.
- NOP_EXPR is used as a special case (see truthvalue_conversion). */
-
-extern void binary_op_error ();
-
-/* Subroutine of build_binary_op, used for comparison operations.
- See if the operands have both been converted from subword integer types
- and, if so, perhaps change them both back to their original type. */
-
-extern tree shorten_compare ();
+\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));
-/* Read the rest of the current #-directive line. */
-extern char *get_directive_line ();
+\f
+/* in c-parse.in */
+extern void c_parse_init PARAMS ((void));
+extern void c_set_yydebug PARAMS ((int));
+extern int yyparse_1 PARAMS ((void));
-/* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
- or validate its data type for an `if' or `while' statement or ?..: exp. */
-extern tree truthvalue_conversion ();
+/* in c-aux-info.c */
+extern void gen_aux_info_record PARAMS ((tree, int, int, int));
-extern int maybe_objc_comptypes ();
-extern tree maybe_building_objc_message_expr ();
-\f
-/* Standard named or nameless data types of the C compiler. */
-
-extern tree short_integer_type_node, integer_type_node;
-extern tree long_integer_type_node, long_long_integer_type_node;
-extern tree short_unsigned_type_node, unsigned_type_node;
-extern tree long_unsigned_type_node, long_long_unsigned_type_node;
-extern tree ptrdiff_type_node;
-extern tree unsigned_char_type_node, signed_char_type_node, char_type_node;
-extern tree wchar_type_node, signed_wchar_type_node, unsigned_wchar_type_node;
-extern tree float_type_node, double_type_node, long_double_type_node;
-extern tree void_type_node, ptr_type_node, const_ptr_type_node;
-extern tree string_type_node, const_string_type_node;
-extern tree char_array_type_node, int_array_type_node, wchar_array_type_node;
-extern tree default_function_type;
-extern tree double_ftype_double, double_ftype_double_double;
-extern tree int_ftype_int, long_ftype_long;
-extern tree void_ftype_ptr_ptr_int, int_ftype_ptr_ptr_int;
-extern tree void_ftype_ptr_int_int, string_ftype_ptr_ptr;
-extern tree int_ftype_string_string, int_ftype_cptr_cptr_sizet;
+/* in c-decl.c */
+extern void c_init_decl_processing PARAMS ((void));
+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 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));
+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 int kept_level_p 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));
+
+
+/* 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));
+
+#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))
+
+/* 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));
/* 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'. */
+ just make their values `void'. */
extern int flag_cond_mismatch;
extern int flag_no_asm;
-/* Nonzero means ignore `#ident' directives. */
-
-extern int flag_no_ident;
-
/* Nonzero means warn about implicit declarations. */
extern int warn_implicit;
-/* Nonzero means give string constants the type `const char *'
- to get extra warnings from them. These warnings will be too numerous
- to be useful, except in thoroughly ANSIfied programs. */
-
-extern int warn_write_strings;
-
-/* 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;
extern int warn_cast_qual;
-/* Warn about traditional constructs whose meanings changed in ANSI C. */
+/* 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_traditional;
+extern int warn_bad_function_cast;
-/* Warn about *printf or *scanf format/argument anomalies. */
+/* Warn about traditional constructs whose meanings changed in ANSI C. */
-extern int warn_format;
+extern int warn_traditional;
/* Warn about a subscript that has type char. */
extern int warn_char_subscripts;
-/* Warn if a type conversion is done that might have confusing results. */
+/* Warn if main is suspicious. */
-extern int warn_conversion;
+extern int warn_main;
-/* Nonzero means do some things the same way PCC does. */
+/* Nonzero means to allow single precision math even if we're generally
+ being traditional. */
+extern int flag_allow_single_precision;
-extern int flag_traditional;
+/* Warn if initializer is not completely bracketed. */
-/* Nonzero means warn about suggesting putting in ()'s. */
+extern int warn_missing_braces;
-extern int warn_parentheses;
+/* Warn about comparison of signed and unsigned values. */
-/* Nonzero means this is a function to call to perform comptypes
- on two record types. */
+extern int warn_sign_compare;
-extern int (*comptypes_record_hook) ();
+/* 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 finish_incomplete_decl PARAMS ((tree));
+
+extern tree static_ctors;
+extern tree static_dtors;
+
+#endif /* ! GCC_C_TREE_H */
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