toplevel:

[pf3gnuchains/gcc-fork.git] / gcc / c-tree.h

diff --git a/gcc/c-tree.h b/gcc/c-tree.h
index 19e5b03..3090a67 100644 (file)
--- a/gcc/c-tree.h
+++ b/gcc/c-tree.h
@@ -1,12 +1,13 @@
 /* Definitions for C parsing and type checking.
    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
 /* Definitions for C parsing and type checking.
    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,

-   1999, 2000, 2001 Free Software Foundation, Inc.
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+   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
 
 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
+Software Foundation; either version 3, or (at your option) any later

 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY


@@ -15,352 +16,603 @@ 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
 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.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */

 
 #ifndef GCC_C_TREE_H
 #define GCC_C_TREE_H
 
 #include "c-common.h"
 
 #ifndef GCC_C_TREE_H
 #define GCC_C_TREE_H
 
 #include "c-common.h"

+#include "toplev.h"
+#include "diagnostic.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 c_common_identifier ignore;
-  tree global_value, local_value, label_value, implicit_decl;
-  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)
-/* 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.  */
+/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
+   know how big it is.  This is sanity-checked in c-decl.c.  */
+#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
+  (sizeof (struct c_common_identifier) + 3 * sizeof (void *))

 
 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only.  */
 
 /* 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.  */
 
 /* 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.  */
 
 /* 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 incomplete RECORD_TYPE or UNION_TYPE, a list of variable
+   declarations whose type would be completed by completing that type.  */
+#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (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.  */
 
 /* 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
-{
-  int len;
-  tree elts[1];
-};
+#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)

 
 /* Record whether a type or decl was written with nonconstant size.
    Note that TYPE_SIZE may have simplified to a constant.  */
 
 /* 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
+#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
+#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)

 
 

-/* Store a value in that field.  */
-#define C_SET_EXP_ORIGINAL_CODE(exp, code) \
-  (TREE_COMPLEXITY (exp) = (int) (code))
+/* Record whether a type is defined inside a struct or union type.
+   This is used for -Wc++-compat. */
+#define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE)

 
 /* Record whether a typedef for type `int' was actually `signed int'.  */
 
 /* 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))
+#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)
+
+/* For a FUNCTION_DECL, nonzero if it was an implicit declaration.  */
+#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
+
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
+   been declared.  */
+#define C_DECL_DECLARED_BUILTIN(EXP)           \
+  DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
+
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
+   built-in prototype and does not have a non-built-in prototype.  */
+#define C_DECL_BUILTIN_PROTOTYPE(EXP)          \
+  DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
+
+/* Record whether a decl was declared register.  This is strictly a
+   front-end flag, whereas DECL_REGISTER is used for code generation;
+   they may differ for structures with volatile fields.  */
+#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
+
+/* Record whether a decl was used in an expression anywhere except an
+   unevaluated operand of sizeof / typeof / alignof.  This is only
+   used for functions declared static but not defined, though outside
+   sizeof and typeof it is set for other function decls as well.  */
+#define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
+
+/* Record whether a variable has been declared threadprivate by
+   #pragma omp threadprivate.  */
+#define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
+
+/* Nonzero for a decl which either doesn't exist or isn't a prototype.
+   N.B. Could be simplified if all built-in decls had complete prototypes
+   (but this is presently difficult because some of them need FILE*).  */
+#define C_DECL_ISNT_PROTOTYPE(EXP)                     \
+       (EXP == 0                                       \
+       || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0       \
+           && !DECL_BUILT_IN (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.  */
 
 /* 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)
-
-\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));
-/* in c-lang.c and objc/objc-act.c */
-extern int defer_fn                            PARAMS ((tree));
-\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));
-
-/* in c-aux-info.c */
-extern void gen_aux_info_record                 PARAMS ((tree, int, int, int));
-
-/* in c-decl.c */
-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));
-
-#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 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 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));
-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-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 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_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;
-
-/* Nonzero means the expression being parsed will never be evaluated.
-   This is a count, since unevaluated expressions can nest.  */
+#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)

 
 

-extern int skip_evaluation;
+/* For a CONSTRUCTOR, whether some initializer contains a
+   subexpression meaning it is not a constant expression.  */
+#define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))

 
 

-/* 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 warn about implicit declarations.  */
-
-extern int warn_implicit;
-
-/* Nonzero means warn for all old-style non-prototype function decls.  */
+/* Record parser information about an expression that is irrelevant
+   for code generation alongside a tree representing its value.  */
+struct c_expr
+{
+  /* The value of the expression.  */
+  tree value;
+  /* Record the original unary/binary operator of an expression, which may
+     have been changed by fold, STRING_CST for unparenthesized string
+     constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
+     (even if parenthesized), for subexpressions, and for non-constant
+     initializers, or ERROR_MARK for other expressions (including
+     parenthesized expressions).  */
+  enum tree_code original_code;
+  /* If not NULL, the original type of an expression.  This will
+     differ from the type of the value field for an enum constant.
+     The type of an enum constant is a plain integer type, but this
+     field will be the enum type.  */
+  tree original_type;
+};

 
 

-extern int warn_strict_prototypes;
+/* A kind of type specifier.  Note that this information is currently
+   only used to distinguish tag definitions, tag references and typeof
+   uses.  */
+enum c_typespec_kind {
+  /* A reserved keyword type specifier.  */
+  ctsk_resword,
+  /* A reference to a tag, previously declared, such as "struct foo".
+     This includes where the previous declaration was as a different
+     kind of tag, in which case this is only valid if shadowing that
+     tag in an inner scope.  */
+  ctsk_tagref,
+  /* A reference to a tag, not previously declared in a visible
+     scope.  */
+  ctsk_tagfirstref,
+  /* A definition of a tag such as "struct foo { int a; }".  */
+  ctsk_tagdef,
+  /* A typedef name.  */
+  ctsk_typedef,
+  /* An ObjC-specific kind of type specifier.  */
+  ctsk_objc,
+  /* A typeof specifier.  */
+  ctsk_typeof
+};

 
 

-/* Nonzero means warn about multiple (redundant) decls for the same single
-   variable or function.  */
+/* A type specifier: this structure is created in the parser and
+   passed to declspecs_add_type only.  */
+struct c_typespec {
+  /* What kind of type specifier this is.  */
+  enum c_typespec_kind kind;
+  /* Whether the expression has operands suitable for use in constant
+     expressions.  */
+  bool expr_const_operands;
+  /* The specifier itself.  */
+  tree spec;
+  /* An expression to be evaluated before the type specifier, in the
+     case of typeof specifiers, or NULL otherwise or if no such
+     expression is required for a particular typeof specifier.  In
+     particular, when typeof is applied to an expression of variably
+     modified type, that expression must be evaluated in order to
+     determine array sizes that form part of the type, but the
+     expression itself (as opposed to the array sizes) forms no part
+     of the type and so needs to be recorded separately.  */
+  tree expr;
+};

 
 

-extern int warn_redundant_decls;
+/* A storage class specifier.  */
+enum c_storage_class {
+  csc_none,
+  csc_auto,
+  csc_extern,
+  csc_register,
+  csc_static,
+  csc_typedef
+};

 
 

-/* 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.  */
+/* A type specifier keyword "void", "_Bool", "char", "int", "float",
+   "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
+   or none of these.  */
+enum c_typespec_keyword {
+  cts_none,
+  cts_void,
+  cts_bool,
+  cts_char,
+  cts_int,
+  cts_float,
+  cts_double,
+  cts_dfloat32,
+  cts_dfloat64,
+  cts_dfloat128,
+  cts_fract,
+  cts_accum
+};

 
 

-extern int warn_nested_externs;
+/* A sequence of declaration specifiers in C.  */
+struct c_declspecs {
+  /* The type specified, if a single type specifier such as a struct,
+     union or enum specifier, typedef name or typeof specifies the
+     whole type, or NULL_TREE if none or a keyword such as "void" or
+     "char" is used.  Does not include qualifiers.  */
+  tree type;
+  /* Any expression to be evaluated before the type, from a typeof
+     specifier.  */
+  tree expr;
+  /* The attributes from a typedef decl.  */
+  tree decl_attr;
+  /* When parsing, the attributes.  Outside the parser, this will be
+     NULL; attributes (possibly from multiple lists) will be passed
+     separately.  */
+  tree attrs;
+  /* The storage class specifier, or csc_none if none.  */
+  enum c_storage_class storage_class;
+  /* Any type specifier keyword used such as "int", not reflecting
+     modifiers such as "short", or cts_none if none.  */
+  ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8;
+  /* Whether any expressions in typeof specifiers may appear in
+     constant expressions.  */
+  BOOL_BITFIELD expr_const_operands : 1;
+  /* Whether any declaration specifiers have been seen at all.  */
+  BOOL_BITFIELD declspecs_seen_p : 1;
+  /* Whether a type specifier has been seen.  */
+  BOOL_BITFIELD type_seen_p : 1;
+  /* Whether something other than a storage class specifier or
+     attribute has been seen.  This is used to warn for the
+     obsolescent usage of storage class specifiers other than at the
+     start of the list.  (Doing this properly would require function
+     specifiers to be handled separately from storage class
+     specifiers.)  */
+  BOOL_BITFIELD non_sc_seen_p : 1;
+  /* Whether the type is specified by a typedef or typeof name.  */
+  BOOL_BITFIELD typedef_p : 1;
+  /* Whether a struct, union or enum type either had its content
+     defined by a type specifier in the list or was the first visible
+     declaration of its tag.  */
+  BOOL_BITFIELD tag_defined_p : 1;
+  /* Whether the type is explicitly "signed" or specified by a typedef
+     whose type is explicitly "signed".  */
+  BOOL_BITFIELD explicit_signed_p : 1;
+  /* Whether the specifiers include a deprecated typedef.  */
+  BOOL_BITFIELD deprecated_p : 1;
+  /* Whether the type defaulted to "int" because there were no type
+     specifiers.  */
+  BOOL_BITFIELD default_int_p : 1;
+  /* Whether "long" was specified.  */
+  BOOL_BITFIELD long_p : 1;
+  /* Whether "long" was specified more than once.  */
+  BOOL_BITFIELD long_long_p : 1;
+  /* Whether "short" was specified.  */
+  BOOL_BITFIELD short_p : 1;
+  /* Whether "signed" was specified.  */
+  BOOL_BITFIELD signed_p : 1;
+  /* Whether "unsigned" was specified.  */
+  BOOL_BITFIELD unsigned_p : 1;
+  /* Whether "complex" was specified.  */
+  BOOL_BITFIELD complex_p : 1;
+  /* Whether "inline" was specified.  */
+  BOOL_BITFIELD inline_p : 1;
+  /* Whether "__thread" was specified.  */
+  BOOL_BITFIELD thread_p : 1;
+  /* Whether "const" was specified.  */
+  BOOL_BITFIELD const_p : 1;
+  /* Whether "volatile" was specified.  */
+  BOOL_BITFIELD volatile_p : 1;
+  /* Whether "restrict" was specified.  */
+  BOOL_BITFIELD restrict_p : 1;
+  /* Whether "_Sat" was specified.  */
+  BOOL_BITFIELD saturating_p : 1;
+  /* The address space that the declaration belongs to.  */
+  addr_space_t address_space;
+};

 
 

-/* Nonzero means warn about pointer casts that can drop a type qualifier
-   from the pointer target type.  */
+/* The various kinds of declarators in C.  */
+enum c_declarator_kind {
+  /* An identifier.  */
+  cdk_id,
+  /* A function.  */
+  cdk_function,
+  /* An array.  */
+  cdk_array,
+  /* A pointer.  */
+  cdk_pointer,
+  /* Parenthesized declarator with nested attributes.  */
+  cdk_attrs
+};

 
 

-extern int warn_cast_qual;
+/* Information about the parameters in a function declarator.  */
+struct c_arg_info {
+  /* A list of parameter decls.  */
+  tree parms;
+  /* A list of structure, union and enum tags defined.  */
+  tree tags;
+  /* A list of argument types to go in the FUNCTION_TYPE.  */
+  tree types;
+  /* A list of non-parameter decls (notably enumeration constants)
+     defined with the parameters.  */
+  tree others;
+  /* A VEC of VLA sizes from the parameters.  In a function
+     definition, these are used to ensure that side-effects in sizes
+     of arrays converted to pointers (such as a parameter int i[n++])
+     take place; otherwise, they are ignored.  */
+  VEC(tree,gc) *pending_sizes;
+  /* True when these arguments had [*].  */
+  BOOL_BITFIELD had_vla_unspec : 1;
+};

 
 

-/* 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.  */
+/* A declarator.  */
+struct c_declarator {
+  /* The kind of declarator.  */
+  enum c_declarator_kind kind;
+  location_t id_loc; /* Currently only set for cdk_id, cdk_array. */
+  /* Except for cdk_id, the contained declarator.  For cdk_id, NULL.  */
+  struct c_declarator *declarator;
+  union {
+    /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
+       declarator.  */
+    tree id;
+    /* For functions.  */
+    struct c_arg_info *arg_info;
+    /* For arrays.  */
+    struct {
+      /* The array dimension, or NULL for [] and [*].  */
+      tree dimen;
+      /* The qualifiers inside [].  */
+      int quals;
+      /* The attributes (currently ignored) inside [].  */
+      tree attrs;
+      /* Whether [static] was used.  */
+      BOOL_BITFIELD static_p : 1;
+      /* Whether [*] was used.  */
+      BOOL_BITFIELD vla_unspec_p : 1;
+    } array;
+    /* For pointers, the qualifiers on the pointer type.  */
+    int pointer_quals;
+    /* For attributes.  */
+    tree attrs;
+  } u;
+};

 
 

-extern int warn_bad_function_cast;
+/* A type name.  */
+struct c_type_name {
+  /* The declaration specifiers.  */
+  struct c_declspecs *specs;
+  /* The declarator.  */
+  struct c_declarator *declarator;
+};

 
 

-/* Warn about traditional constructs whose meanings changed in ANSI C.  */
+/* A parameter.  */
+struct c_parm {
+  /* The declaration specifiers, minus any prefix attributes.  */
+  struct c_declspecs *specs;
+  /* The attributes.  */
+  tree attrs;
+  /* The declarator.  */
+  struct c_declarator *declarator;
+};

 
 

-extern int warn_traditional;
+/* Used when parsing an enum.  Initialized by start_enum.  */
+struct c_enum_contents
+{
+  /* While defining an enum type, this is 1 plus the last enumerator
+     constant value.  */
+  tree enum_next_value;

 
 

-/* Warn about a subscript that has type char.  */
+  /* Nonzero means that there was overflow computing enum_next_value.  */
+  int enum_overflow;
+};

 
 

-extern int warn_char_subscripts;
+/* A type of reference to a static identifier in an inline
+   function.  */
+enum c_inline_static_type {
+  /* Identifier with internal linkage used in function that may be an
+     inline definition (i.e., file-scope static).  */
+  csi_internal,
+  /* Modifiable object with static storage duration defined in
+     function that may be an inline definition (i.e., local
+     static).  */
+  csi_modifiable
+};

 
 

-/* Warn if main is suspicious.  */
+\f
+/* in c-parser.c */
+extern void c_parse_init (void);

 
 

-extern int warn_main;
+/* in c-aux-info.c */
+extern void gen_aux_info_record (tree, int, int, int);

 
 

-/* Nonzero means to allow single precision math even if we're generally
-   being traditional.  */
-extern int flag_allow_single_precision;
+/* in c-decl.c */
+struct c_spot_bindings;
+struct c_struct_parse_info;
+extern struct obstack parser_obstack;
+extern tree c_break_label;
+extern tree c_cont_label;
+
+extern int global_bindings_p (void);
+extern void push_scope (void);
+extern tree pop_scope (void);
+extern void c_bindings_start_stmt_expr (struct c_spot_bindings *);
+extern void c_bindings_end_stmt_expr (struct c_spot_bindings *);
+
+extern void record_inline_static (location_t, tree, tree,
+                                 enum c_inline_static_type);
+extern void c_init_decl_processing (void);
+extern void c_print_identifier (FILE *, tree, int);
+extern int quals_from_declspecs (const struct c_declspecs *);
+extern struct c_declarator *build_array_declarator (location_t, tree,
+                                                   struct c_declspecs *,
+                                                   bool, bool);
+extern tree build_enumerator (location_t, struct c_enum_contents *, tree, tree);
+extern tree check_for_loop_decls (location_t);
+extern void mark_forward_parm_decls (void);
+extern void declare_parm_level (void);
+extern void undeclared_variable (location_t, tree);
+extern tree lookup_label_for_goto (location_t, tree);
+extern tree declare_label (tree);
+extern tree define_label (location_t, tree);
+extern struct c_spot_bindings *c_get_switch_bindings (void);
+extern void c_release_switch_bindings (struct c_spot_bindings *);
+extern bool c_check_switch_jump_warnings (struct c_spot_bindings *,
+                                         location_t, location_t);
+extern void finish_decl (tree, location_t, tree, tree, tree);
+extern tree finish_enum (tree, tree, tree);
+extern void finish_function (void);
+extern tree finish_struct (location_t, tree, tree, tree,
+                          struct c_struct_parse_info *);
+extern struct c_arg_info *get_parm_info (bool);
+extern tree grokfield (location_t, struct c_declarator *,
+                      struct c_declspecs *, tree, tree *);
+extern tree groktypename (struct c_type_name *, tree *, bool *);
+extern tree grokparm (const struct c_parm *);
+extern tree implicitly_declare (location_t, tree);
+extern void keep_next_level (void);
+extern void pending_xref_error (void);
+extern void c_push_function_context (void);
+extern void c_pop_function_context (void);
+extern void push_parm_decl (const struct c_parm *);
+extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
+                                                       struct c_declarator *);
+extern tree c_builtin_function (tree);
+extern tree c_builtin_function_ext_scope (tree);
+extern void shadow_tag (const struct c_declspecs *);
+extern void shadow_tag_warned (const struct c_declspecs *, int);
+extern tree start_enum (location_t, struct c_enum_contents *, tree);
+extern int  start_function (struct c_declspecs *, struct c_declarator *, tree);
+extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
+                       tree);
+extern tree start_struct (location_t, enum tree_code, tree,
+                         struct c_struct_parse_info **);
+extern void store_parm_decls (void);
+extern void store_parm_decls_from (struct c_arg_info *);
+extern tree xref_tag (enum tree_code, tree);
+extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree);
+extern int c_expand_decl (tree);
+extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
+                                   struct c_declarator *);
+extern struct c_declarator *build_attrs_declarator (tree,
+                                                   struct c_declarator *);
+extern struct c_declarator *build_function_declarator (struct c_arg_info *,
+                                                      struct c_declarator *);
+extern struct c_declarator *build_id_declarator (tree);
+extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
+                                                    struct c_declarator *);
+extern struct c_declspecs *build_null_declspecs (void);
+extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_type (location_t,
+                                              struct c_declspecs *,
+                                              struct c_typespec);
+extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_addrspace (struct c_declspecs *,
+                                                   addr_space_t);
+extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
+
+/* in c-objc-common.c */
+extern bool c_objc_common_init (void);
+extern bool c_missing_noreturn_ok_p (tree);
+extern bool c_warn_unused_global_decl (const_tree);
+extern void c_initialize_diagnostics (diagnostic_context *);
+extern bool c_vla_unspec_p (tree x, tree fn);

 
 

-/* Warn if initializer is not completely bracketed.  */
+#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 warn_missing_braces;
+/* in c-typeck.c */
+extern bool in_late_binary_op;
+extern int in_alignof;
+extern int in_sizeof;
+extern int in_typeof;
+
+extern struct c_switch *c_switch_stack;
+
+extern tree c_objc_common_truthvalue_conversion (location_t, tree);
+extern tree require_complete_type (tree);
+extern int same_translation_unit_p (const_tree, const_tree);
+extern int comptypes (tree, tree);
+extern bool c_vla_type_p (const_tree);
+extern bool c_mark_addressable (tree);
+extern void c_incomplete_type_error (const_tree, const_tree);
+extern tree c_type_promotes_to (tree);
+extern struct c_expr default_function_array_conversion (location_t,
+                                                       struct c_expr);
+extern struct c_expr default_function_array_read_conversion (location_t,
+                                                            struct c_expr);
+extern void mark_exp_read (tree);
+extern tree composite_type (tree, tree);
+extern tree build_component_ref (location_t, tree, tree);
+extern tree build_array_ref (location_t, tree, tree);
+extern tree build_external_ref (location_t, tree, int, tree *);
+extern void pop_maybe_used (bool);
+extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr);
+extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *);
+extern struct c_expr parser_build_unary_op (location_t, enum tree_code,
+                                           struct c_expr);
+extern struct c_expr parser_build_binary_op (location_t,
+                                            enum tree_code, struct c_expr,
+                                            struct c_expr);
+extern tree build_conditional_expr (location_t, tree, bool, tree, tree,
+                                   tree, tree);
+extern tree build_compound_expr (location_t, tree, tree);
+extern tree c_cast_expr (location_t, struct c_type_name *, tree);
+extern tree build_c_cast (location_t, tree, tree);
+extern void store_init_value (location_t, tree, tree, tree);
+extern void error_init (const char *);
+extern void pedwarn_init (location_t, int opt, const char *);
+extern void maybe_warn_string_init (tree, struct c_expr);
+extern void start_init (tree, tree, int);
+extern void finish_init (void);
+extern void really_start_incremental_init (tree);
+extern void push_init_level (int, struct obstack *);
+extern struct c_expr pop_init_level (int, struct obstack *);
+extern void set_init_index (tree, tree, struct obstack *);
+extern void set_init_label (tree, struct obstack *);
+extern void process_init_element (struct c_expr, bool, struct obstack *);
+extern tree build_compound_literal (location_t, tree, tree, bool);
+extern void check_compound_literal_type (location_t, struct c_type_name *);
+extern tree c_start_case (location_t, location_t, tree);
+extern void c_finish_case (tree);
+extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool);
+extern tree build_asm_stmt (tree, tree);
+extern int c_types_compatible_p (tree, tree);
+extern tree c_begin_compound_stmt (bool);
+extern tree c_end_compound_stmt (location_t, tree, bool);
+extern void c_finish_if_stmt (location_t, tree, tree, tree, bool);
+extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
+extern tree c_begin_stmt_expr (void);
+extern tree c_finish_stmt_expr (location_t, tree);
+extern tree c_process_expr_stmt (location_t, tree);
+extern tree c_finish_expr_stmt (location_t, tree);
+extern tree c_finish_return (location_t, tree, tree);
+extern tree c_finish_bc_stmt (location_t, tree *, bool);
+extern tree c_finish_goto_label (location_t, tree);
+extern tree c_finish_goto_ptr (location_t, tree);
+extern tree c_expr_to_decl (tree, bool *, bool *);
+extern tree c_begin_omp_parallel (void);
+extern tree c_finish_omp_parallel (location_t, tree, tree);
+extern tree c_begin_omp_task (void);
+extern tree c_finish_omp_task (location_t, tree, tree);
+extern tree c_finish_omp_clauses (tree);
+extern tree c_build_va_arg (location_t, tree, tree);

 
 

-/* Warn about comparison of signed and unsigned values.  */
+/* 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_sign_compare;
+extern int current_function_returns_value;

 
 

-/* Warn about testing equality of floating point numbers.  */
+/* Set to 0 at beginning of a function definition, set to 1 if
+   a return statement with no argument is seen.  */

 
 

-extern int warn_float_equal;
+extern int current_function_returns_null;

 
 

-/* Warn about multicharacter constants.  */
+/* Set to 0 at beginning of a function definition, set to 1 if
+   a call to a noreturn function is seen.  */

 
 

-extern int warn_multichar;
+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 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;
+/* True means global_bindings_p should return false even if the scope stack
+   says we are in file scope.  */
+
+extern bool c_override_global_bindings_to_false;

 
 /* In c-decl.c */
 
 /* In c-decl.c */

-extern void finish_incomplete_decl PARAMS ((tree));
+extern void c_finish_incomplete_decl (tree);
+extern void c_write_global_declarations (void);
+
+/* In order for the format checking to accept the C frontend
+   diagnostic framework extensions, you must include this file before
+   toplev.h, not after.  */
+#if GCC_VERSION >= 4001
+#define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
+#else
+#define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
+#endif
+
+extern void pedwarn_c90 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
+extern void pedwarn_c99 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
+
+extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
+                        const char *, va_list *)
+     ATTRIBUTE_GCC_CDIAG(6,0);

 
 #endif /* ! GCC_C_TREE_H */
 
 #endif /* ! GCC_C_TREE_H */