/* Definitions for C parsing and type checking.
- Copyright (C) 1987 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1993 Free Software Foundation, Inc.
This file is part of GNU CC.
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+#ifndef _C_TREE_H
+#define _C_TREE_H
+
+#ifndef STDIO_PROTO
+#ifdef BUFSIZ
+#define STDIO_PROTO(ARGS) PROTO(ARGS)
+#else
+#define STDIO_PROTO(ARGS) ()
+#endif
+#endif
+
/* 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. */
+
struct lang_identifier
{
struct tree_identifier ignore;
tree global_value, local_value, label_value, implicit_decl;
- tree error_locus;
+ tree error_locus, limbo_value;
};
/* 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)
/* Record whether a typedef for type `int' was actually `signed int'. */
#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))
+
/* 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 ();
-
-/* Functions in c-common.c: */
-/* 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 ();
+/* 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
+/* in c-lang.c and objc-act.c */
+extern tree lookup_interface PROTO((tree));
+extern tree is_class_name PROTO((tree));
+extern void maybe_objc_check_decl PROTO((tree));
+extern int maybe_objc_comptypes PROTO((tree, tree, int));
+extern tree maybe_building_objc_message_expr PROTO((void));
+extern tree maybe_objc_method_name PROTO((tree));
+extern int recognize_objc_keyword PROTO((void));
+extern tree build_objc_string PROTO((int, char *));
+\f
+/* 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 ();
-
+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 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));
-extern tree shorten_compare ();
+/* in c-convert.c */
+extern tree convert PROTO((tree, tree));
-/* Read the rest of the current #-directive line. */
-extern char *get_directive_line ();
-
-extern int maybe_objc_comptypes ();
-extern tree maybe_building_objc_message_expr ();
-\f
+/* in c-decl.c */
/* 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 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, 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;
+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 lookup_name_current_level 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));
+
+/* 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 tree require_complete_type PROTO((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));
/* 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 warn_parentheses;
+/* Warn if initializer is not completely bracketed. */
+
+extern int warn_missing_braces;
+
/* Nonzero means this is a function to call to perform comptypes
on two record types. */
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
+
+/* Nonzero enables objc features. */
+
+extern int doing_objc_thang;
+
+#endif /* not _C_TREE_H */
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