/* Definitions for C parsing and type checking.
- Copyright (C) 1987, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
+ 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
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. */
+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
-#ifndef STDIO_PROTO
-#ifdef BUFSIZ
-#define STDIO_PROTO(ARGS) PROTO(ARGS)
-#else
-#define STDIO_PROTO(ARGS) ()
-#endif
-#endif
+#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. */
+ 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, limbo_value;
};
+/* Wrapping c_lang_decl in another struct is an unfortunate
+ necessity. */
+
+struct lang_decl
+{
+ struct c_lang_decl base;
+};
+
/* 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)
+ (((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)
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)
+
/* 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))
-
#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
/* Store a value in that field. */
#define C_SET_EXP_ORIGINAL_CODE(exp, code) \
- (TREE_COMPLEXITY (exp) = (int)(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))
without prototypes. */
#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE)
-/* Nonzero if the type T promotes to itself.
- ANSI C states explicitly the list of types that promote;
- in particular, short promotes to int even if they have the same width. */
-#define C_PROMOTING_INTEGER_TYPE_P(t) \
- (TREE_CODE ((t)) == INTEGER_TYPE \
- && (TYPE_MAIN_VARIANT (t) == char_type_node \
- || TYPE_MAIN_VARIANT (t) == signed_char_type_node \
- || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \
- || TYPE_MAIN_VARIANT (t) == short_integer_type_node \
- || TYPE_MAIN_VARIANT (t) == short_unsigned_type_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
-extern int maybe_objc_comptypes PROTO((tree, tree));
-extern tree maybe_building_objc_message_expr PROTO((void));
+/* 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));
\f
+/* in c-parse.in */
+extern void c_parse_init PARAMS ((void));
+extern int yyparse_1 PARAMS ((void));
+
/* in c-aux-info.c */
-extern void gen_aux_info_record PROTO((tree, int, int, int));
-
-/* in c-common.c */
-/* 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 PROTO((enum tree_code));
-extern void c_expand_expr_stmt PROTO((tree));
-/* Validate the expression after `case' and apply default promotions. */
-extern tree check_case_value PROTO((tree));
-/* Concatenate a list of STRING_CST nodes into one STRING_CST. */
-extern tree combine_strings PROTO((tree));
-extern void constant_expression_warning PROTO((tree));
-extern void decl_attributes PROTO((tree, tree));
-extern void declare_function_name PROTO((void));
-extern tree convert_and_check PROTO((tree, tree));
-extern void constant_expression_warning PROTO((tree));
-extern void overflow_warning PROTO((tree));
-extern void unsigned_conversion_warning PROTO((tree, tree));
-/* Read the rest of the current #-directive line. */
-extern char *get_directive_line STDIO_PROTO((FILE *));
-/* 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 PROTO((tree *, tree *, tree *, enum tree_code *));
-/* 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 PROTO((tree));
-extern tree type_for_mode PROTO((enum machine_mode, int));
-extern tree type_for_size PROTO((unsigned, int));
-
-/* in c-convert.c */
-extern tree convert PROTO((tree, tree));
+extern void gen_aux_info_record PARAMS ((tree, int, int, int));
/* in c-decl.c */
-/* Standard named or nameless data types of the C compiler. */
-extern tree char_array_type_node;
-extern tree char_type_node;
-extern tree const_ptr_type_node;
-extern tree const_string_type_node;
-extern tree default_function_type;
-extern tree double_ftype_double;
-extern tree double_ftype_double_double;
-extern tree double_type_node;
-extern tree float_type_node;
-extern tree intDI_type_node;
-extern tree intHI_type_node;
-extern tree intQI_type_node;
-extern tree intSI_type_node;
-extern tree int_array_type_node;
-extern tree int_ftype_cptr_cptr_sizet;
-extern tree int_ftype_int;
-extern tree int_ftype_ptr_ptr_int;
-extern tree int_ftype_string_string;
-extern tree integer_type_node;
-extern tree long_double_type_node;
-extern tree long_ftype_long;
-extern tree long_integer_type_node;
-extern tree long_long_integer_type_node;
-extern tree long_long_unsigned_type_node;
-extern tree long_unsigned_type_node;
-extern tree complex_integer_type_node;
-extern tree complex_float_type_node;
-extern tree complex_double_type_node;
-extern tree complex_long_double_type_node;
-extern tree ptr_type_node;
-extern tree ptrdiff_type_node;
-extern tree short_integer_type_node;
-extern tree short_unsigned_type_node;
-extern tree signed_char_type_node;
-extern tree signed_wchar_type_node;
-extern tree string_ftype_ptr_ptr;
-extern tree string_type_node;
-extern tree unsigned_char_type_node;
-extern tree unsigned_intDI_type_node;
-extern tree unsigned_intHI_type_node;
-extern tree unsigned_intQI_type_node;
-extern tree unsigned_intSI_type_node;
-extern tree unsigned_type_node;
-extern tree unsigned_wchar_type_node;
-extern tree void_ftype_ptr_int_int;
-extern tree void_ftype_ptr_ptr_int;
-extern tree void_type_node;
-extern tree wchar_array_type_node;
-extern tree wchar_type_node;
-
-extern tree build_enumerator PROTO((tree, tree));
-/* Declare a predefined function. Return the declaration. */
-extern tree builtin_function PROTO((char *, tree, enum built_in_function function_, char *));
-/* Add qualifiers to a type, in the fashion for C. */
-extern tree c_build_type_variant PROTO((tree, int, int));
-extern int c_decode_option PROTO((char *));
-extern void c_mark_varargs PROTO((void));
-extern tree check_identifier PROTO((tree, tree));
-extern void clear_parm_order PROTO((void));
-extern tree combine_parm_decls PROTO((tree, tree, int));
-extern int complete_array_type PROTO((tree, tree, int));
-extern void declare_parm_level PROTO((int));
-extern tree define_label PROTO((char *, int, tree));
-extern void delete_block PROTO((tree));
-extern void finish_decl PROTO((tree, tree, tree));
-extern tree finish_enum PROTO((tree, tree));
-extern void finish_function PROTO((int));
-extern tree finish_struct PROTO((tree, tree));
-extern tree get_parm_info PROTO((int));
-extern tree getdecls PROTO((void));
-extern tree gettags PROTO((void));
-extern int global_bindings_p PROTO((void));
-extern tree grokfield PROTO((char *, int, tree, tree, tree));
-extern tree groktypename PROTO((tree));
-extern tree groktypename_in_parm_context PROTO((tree));
-extern tree implicitly_declare PROTO((tree));
-extern int in_parm_level_p PROTO((void));
-extern void init_decl_processing PROTO((void));
-extern void insert_block PROTO((tree));
-extern void keep_next_level PROTO((void));
-extern int kept_level_p PROTO((void));
-extern tree lookup_label PROTO((tree));
-extern tree lookup_name PROTO((tree));
-extern tree maybe_build_cleanup PROTO((tree));
-extern void parmlist_tags_warning PROTO((void));
-extern void pending_xref_error PROTO((void));
-extern void pop_c_function_context PROTO((void));
-extern void pop_label_level PROTO((void));
-extern tree poplevel PROTO((int, int, int));
-extern void print_lang_decl PROTO((void));
-extern void print_lang_identifier STDIO_PROTO((FILE *, tree,
- int));
-extern void print_lang_type PROTO((void));
-extern void push_c_function_context PROTO((void));
-extern void push_label_level PROTO((void));
-extern void push_parm_decl PROTO((tree));
-extern tree pushdecl PROTO((tree));
-extern tree pushdecl_top_level PROTO((tree));
-extern void pushlevel PROTO((int));
-extern void pushtag PROTO((tree, tree));
-extern void set_block PROTO((tree));
-extern tree shadow_label PROTO((tree));
-extern void shadow_record_fields PROTO((tree));
-extern void shadow_tag PROTO((tree));
-extern void shadow_tag_warned PROTO((tree, int));
-extern tree start_enum PROTO((tree));
-extern int start_function PROTO((tree, tree, int));
-extern tree start_decl PROTO((tree, tree, int));
-extern tree start_struct PROTO((enum tree_code, tree));
-extern void store_parm_decls PROTO((void));
-extern tree xref_tag PROTO((enum tree_code, tree));
+extern tree build_array_declarator PARAMS ((tree, tree, int, int));
+extern tree build_enumerator PARAMS ((tree, 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))
+extern int c_decode_option PARAMS ((int, char **));
+extern void c_mark_varargs PARAMS ((void));
+extern void check_for_loop_decls PARAMS ((void));
+extern tree check_identifier PARAMS ((tree, tree));
+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 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 tree lookup_name_current_level_global 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_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 tree start_decl PARAMS ((tree, tree, int,
+ 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_decl_stmt PARAMS ((tree));
/* in c-typeck.c */
-extern tree build_array_ref PROTO((tree, tree));
-extern tree build_binary_op PROTO((enum tree_code, tree, tree, int));
-extern tree build_c_cast PROTO((tree, tree));
-extern tree build_component_ref PROTO((tree, tree));
-extern tree build_compound_expr PROTO((tree));
-extern tree build_conditional_expr PROTO((tree, tree, tree));
-extern tree build_function_call PROTO((tree, tree));
-extern tree build_indirect_ref PROTO((tree, char *));
-extern tree build_modify_expr PROTO((tree, enum tree_code, tree));
-extern tree build_unary_op PROTO((enum tree_code, tree, int));
-extern tree c_alignof PROTO((tree));
-extern tree c_alignof_expr PROTO((tree));
-extern tree c_sizeof PROTO((tree));
-extern tree c_expand_start_case PROTO((tree));
-/* 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 PROTO((tree, tree));
-extern tree default_conversion PROTO((tree));
-extern tree digest_init PROTO((tree, tree, tree *, int, int, char *));
-extern tree parser_build_binary_op PROTO((enum tree_code, tree, tree));
-extern void store_init_value PROTO((tree, tree));
-
-/* in c-iterate.c */
-extern void iterator_expand PROTO((tree));
-extern void iterator_for_loop_start PROTO((tree));
-extern void iterator_for_loop_end PROTO((tree));
-extern void iterator_for_loop_record PROTO((tree));
-extern void push_iterator_stack PROTO((void));
-extern void pop_iterator_stack PROTO((void));
+extern tree require_complete_type PARAMS ((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 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 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;
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_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. */
-/* Warn if initializer is not completely bracketed. */
+extern int warn_sign_compare;
-extern int warn_missing_braces;
+/* Warn about testing equality of floating point numbers. */
-/* Nonzero means this is a function to call to perform comptypes
- on two record types. */
+extern int warn_float_equal;
-extern int (*comptypes_record_hook) ();
+/* 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;
-#endif /* not _C_TREE_H */
+/* 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));
+
+#endif /* ! GCC_C_TREE_H */
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