/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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 3, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-#ifndef _C_TREE_H
-#define _C_TREE_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. */
+/* 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 *))
-/* 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. */
+/* Language-specific declaration information. */
-struct lang_identifier
+struct lang_decl GTY(())
{
- struct tree_identifier ignore;
- tree global_value, local_value, label_value, implicit_decl;
- tree error_locus, limbo_value;
+ char dummy;
};
-/* 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. */
-
-/* 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 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. */
+#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
+struct lang_type GTY(())
{
- int len;
- tree elts[1];
+ /* In a RECORD_TYPE, a sorted array of the fields of the type. */
+ struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
+ /* In an ENUMERAL_TYPE, the min and max values. */
+ tree enum_min;
+ tree enum_max;
+ /* In a RECORD_TYPE, information specific to Objective-C, such
+ as a list of adopted protocols or a pointer to a corresponding
+ @interface. See objc/objc-act.h for details. */
+ tree objc_info;
};
-/* 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)
-
-#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
-
-/* Store a value in that field. */
-#define C_SET_EXP_ORIGINAL_CODE(exp, code) \
- (TREE_COMPLEXITY (exp) = (int) (code))
+#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
+#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
/* 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 label was defined in a statement expression which
+ has finished and so can no longer be jumped to. */
+#define C_DECL_UNJUMPABLE_STMT_EXPR(EXP) \
+ DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+ current level of statement expression nesting and so cannot be
+ defined right now. */
+#define C_DECL_UNDEFINABLE_STMT_EXPR(EXP) \
+ DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was defined in the scope of an identifier
+ with variably modified type which has finished and so can no longer
+ be jumped to. */
+#define C_DECL_UNJUMPABLE_VM(EXP) \
+ DECL_LANG_FLAG_3 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+ current level of scopes of identifiers with variably modified type
+ and so cannot be defined right now. */
+#define C_DECL_UNDEFINABLE_VM(EXP) \
+ DECL_LANG_FLAG_5 (LABEL_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. */
-#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE)
-
-/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
-#define DECL_C_BIT_FIELD(NODE) DECL_LANG_FLAG_4 (NODE)
-
-/* In a VAR_DECL, means the variable is really an iterator. */
-#define ITERATOR_P(D) (DECL_LANG_FLAG_4(D))
-
-/* In a VAR_DECL for an iterator, means we are within
- an explicit loop over that iterator. */
-#define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag)
-\f
-/* in c-lang.c and objc-act.c */
-extern tree lookup_interface PARAMS ((tree));
-extern tree is_class_name PARAMS ((tree));
-extern void maybe_objc_check_decl PARAMS ((tree));
-extern void finish_file PARAMS ((void));
-extern int maybe_objc_comptypes PARAMS ((tree, tree, int));
-extern tree maybe_building_objc_message_expr PARAMS ((void));
-extern tree maybe_objc_method_name PARAMS ((tree));
-extern int recognize_objc_keyword PARAMS ((void));
-extern tree build_objc_string PARAMS ((int, const char *));
-extern tree lookup_objc_ivar PARAMS ((tree));
-\f
-/* in c-parse.in */
-extern void c_parse_init PARAMS ((void));
-
-/* in c-aux-info.c */
-extern void gen_aux_info_record PARAMS ((tree, int, int, int));
-
-/* In c-common.c */
-extern unsigned int min_precision PARAMS ((tree, int));
-
-/* in c-convert.c */
-extern tree convert PARAMS ((tree, tree));
-
-/* in c-decl.c */
-extern tree build_enumerator PARAMS ((tree, tree));
-/* Add qualifiers to a type, in the fashion for C. */
-extern tree c_build_qualified_type PARAMS ((tree, int));
-#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
- c_build_qualified_type (TYPE, \
- ((CONST_P) ? TYPE_QUAL_CONST : 0) | \
- ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
-extern int c_decode_option PARAMS ((int, char **));
-extern void c_mark_varargs PARAMS ((void));
-extern tree check_identifier PARAMS ((tree, tree));
-extern void 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 getdecls PARAMS ((void));
-extern tree gettags PARAMS ((void));
-extern int global_bindings_p PARAMS ((void));
-extern tree grokfield PARAMS ((const char *, int, tree, tree, tree));
-extern tree groktypename PARAMS ((tree));
-extern tree groktypename_in_parm_context PARAMS ((tree));
-extern tree implicitly_declare PARAMS ((tree));
-extern int in_parm_level_p PARAMS ((void));
-extern void init_decl_processing PARAMS ((void));
-extern void insert_block PARAMS ((tree));
-extern void keep_next_level PARAMS ((void));
-extern int kept_level_p PARAMS ((void));
-extern tree lookup_label PARAMS ((tree));
-extern tree lookup_name PARAMS ((tree));
-extern tree lookup_name_current_level PARAMS ((tree));
-extern tree lookup_name_current_level_global PARAMS ((tree));
-extern tree maybe_build_cleanup PARAMS ((tree));
-extern void parmlist_tags_warning PARAMS ((void));
-extern void pending_xref_error PARAMS ((void));
-extern void mark_c_function_context PARAMS ((struct function *));
-extern void push_c_function_context PARAMS ((struct function *));
-extern void pop_c_function_context PARAMS ((struct function *));
-extern void pop_label_level PARAMS ((void));
-extern tree poplevel PARAMS ((int, int, int));
-extern void print_lang_decl PARAMS ((FILE *, tree, int));
-extern void print_lang_identifier PARAMS ((FILE *, tree, int));
-extern void print_lang_type PARAMS ((FILE *, tree, int));
-extern void push_label_level PARAMS ((void));
-extern void push_parm_decl PARAMS ((tree));
-extern tree pushdecl PARAMS ((tree));
-extern tree pushdecl_top_level PARAMS ((tree));
-extern void pushlevel PARAMS ((int));
-extern void pushtag PARAMS ((tree, tree));
-extern void set_block PARAMS ((tree));
-extern 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));
-
-/* in c-typeck.c */
-extern tree require_complete_type PARAMS ((tree));
-extern void incomplete_type_error PARAMS ((tree, tree));
-extern int comptypes PARAMS ((tree, tree));
-extern tree c_sizeof PARAMS ((tree));
-extern tree c_sizeof_nowarn PARAMS ((tree));
-extern tree c_size_in_bytes PARAMS ((tree));
-extern tree c_alignof PARAMS ((tree));
-extern tree c_alignof_expr PARAMS ((tree));
-extern tree build_component_ref PARAMS ((tree, tree));
-extern tree build_indirect_ref PARAMS ((tree, const char *));
-extern tree build_array_ref PARAMS ((tree, tree));
-extern tree build_external_ref PARAMS ((tree, int));
-extern tree build_function_call PARAMS ((tree, tree));
-extern tree parser_build_binary_op PARAMS ((enum tree_code,
- tree, tree));
-extern int lvalue_or_else PARAMS ((tree, const char *));
-extern void readonly_warning PARAMS ((tree, const char *));
-extern int mark_addressable PARAMS ((tree));
-extern tree build_conditional_expr PARAMS ((tree, tree, tree));
-extern tree build_compound_expr PARAMS ((tree));
-extern tree build_c_cast PARAMS ((tree, tree));
-extern tree 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;
-
-/* in c-iterate.c */
-extern void init_iterators PARAMS ((void));
-extern void iterator_expand PARAMS ((tree));
-extern void iterator_for_loop_start PARAMS ((tree));
-extern void iterator_for_loop_end PARAMS ((tree));
-extern void iterator_for_loop_record PARAMS ((tree));
-extern void push_iterator_stack PARAMS ((void));
-extern void pop_iterator_stack PARAMS ((void));
-
-/* 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. */
-
-extern int skip_evaluation;
-
-/* Nonzero means `$' can be in an identifier. */
-
-extern int dollars_in_ident;
-
-/* Nonzero means allow type mismatches in conditional expressions;
- just make their values `void'. */
-
-extern int flag_cond_mismatch;
-
-/* Nonzero means don't recognize the keyword `asm'. */
-
-extern int flag_no_asm;
-
-/* Nonzero means environment is hosted (i.e., not freestanding) */
+#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
-extern int flag_hosted;
-
-/* Nonzero means warn about implicit declarations. */
-
-extern int warn_implicit;
+/* 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 binary operator of an expression, which may
+ have been changed by fold, STRING_CST for unparenthesized string
+ constants, or ERROR_MARK for other expressions (including
+ parenthesized expressions). */
+ enum tree_code original_code;
+};
-/* Nonzero means warn about sizeof (function) or addition/subtraction
- of function pointers. */
+/* 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
+};
-extern int warn_pointer_arith;
+/* 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;
+ /* The specifier itself. */
+ tree spec;
+};
-/* Nonzero means warn for all old-style non-prototype function decls. */
+/* A storage class specifier. */
+enum c_storage_class {
+ csc_none,
+ csc_auto,
+ csc_extern,
+ csc_register,
+ csc_static,
+ csc_typedef
+};
-extern int warn_strict_prototypes;
+/* 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
+};
-/* Nonzero means warn about multiple (redundant) decls for the same single
- variable or function. */
+/* 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;
+ /* 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;
+ /* Any type specifier keyword used such as "int", not reflecting
+ modifiers such as "short", or cts_none if none. */
+ enum c_typespec_keyword typespec_word;
+ /* The storage class specifier, or csc_none if none. */
+ enum c_storage_class storage_class;
+ /* 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;
+ /* 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;
+};
-extern int warn_redundant_decls;
+/* 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
+};
-/* 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. */
+/* 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 list 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. */
+ tree pending_sizes;
+ /* True when these arguments had [*]. */
+ BOOL_BITFIELD had_vla_unspec : 1;
+};
-extern int warn_nested_externs;
+/* A declarator. */
+struct c_declarator {
+ /* The kind of declarator. */
+ enum c_declarator_kind kind;
+ /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
+ struct c_declarator *declarator;
+ location_t id_loc; /* Currently only set for cdk_id. */
+ 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;
+};
-/* Nonzero means warn about pointer casts that can drop a type qualifier
- from the pointer target type. */
+/* A type name. */
+struct c_type_name {
+ /* The declaration specifiers. */
+ struct c_declspecs *specs;
+ /* The declarator. */
+ struct c_declarator *declarator;
+};
-extern int warn_cast_qual;
+/* 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;
+};
-/* 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. */
+/* Save and restore the variables in this file and elsewhere
+ that keep track of the progress of compilation of the current function.
+ Used for nested functions. */
-extern int warn_bad_function_cast;
+struct language_function GTY(())
+{
+ struct c_language_function base;
+ tree x_break_label;
+ tree x_cont_label;
+ struct c_switch * GTY((skip)) x_switch_stack;
+ struct c_arg_info * GTY((skip)) arg_info;
+ int returns_value;
+ int returns_null;
+ int returns_abnormally;
+ int warn_about_return_type;
+};
-/* Warn about functions which might be candidates for attribute noreturn. */
+/* Save lists of labels used or defined in particular contexts.
+ Allocated on the parser obstack. */
-extern int warn_missing_noreturn;
+struct c_label_list
+{
+ /* The label at the head of the list. */
+ tree label;
+ /* The rest of the list. */
+ struct c_label_list *next;
+};
-/* Warn about traditional constructs whose meanings changed in ANSI C. */
+/* Statement expression context. */
-extern int warn_traditional;
+struct c_label_context_se
+{
+ /* The labels defined at this level of nesting. */
+ struct c_label_list *labels_def;
+ /* The labels used at this level of nesting. */
+ struct c_label_list *labels_used;
+ /* The next outermost context. */
+ struct c_label_context_se *next;
+};
-/* Warn about a subscript that has type char. */
+/* Context of variably modified declarations. */
-extern int warn_char_subscripts;
+struct c_label_context_vm
+{
+ /* The labels defined at this level of nesting. */
+ struct c_label_list *labels_def;
+ /* The labels used at this level of nesting. */
+ struct c_label_list *labels_used;
+ /* The scope of this context. Multiple contexts may be at the same
+ numbered scope, since each variably modified declaration starts a
+ new context. */
+ unsigned scope;
+ /* The next outermost context. */
+ struct c_label_context_vm *next;
+};
-/* Warn if main is suspicious. */
+/* 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;
-extern int warn_main;
+ /* Nonzero means that there was overflow computing enum_next_value. */
+ int enum_overflow;
+};
-/* Nonzero means to allow single precision math even if we're generally
- being traditional. */
-extern int flag_allow_single_precision;
+\f
+/* in c-parser.c */
+extern void c_parse_init (void);
-/* Warn if initializer is not completely bracketed. */
+/* in c-aux-info.c */
+extern void gen_aux_info_record (tree, int, int, int);
-extern int warn_missing_braces;
+/* in c-decl.c */
+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 insert_block (tree);
+
+extern void c_init_decl_processing (void);
+extern void c_dup_lang_specific_decl (tree);
+extern void c_print_identifier (FILE *, tree, int);
+extern int quals_from_declspecs (const struct c_declspecs *);
+extern struct c_declarator *build_array_declarator (tree, struct c_declspecs *,
+ bool, bool);
+extern tree build_enumerator (struct c_enum_contents *, tree, tree);
+extern tree check_for_loop_decls (void);
+extern void mark_forward_parm_decls (void);
+extern void declare_parm_level (void);
+extern void undeclared_variable (tree, location_t);
+extern tree declare_label (tree);
+extern tree define_label (location_t, tree);
+extern void c_maybe_initialize_eh (void);
+extern void finish_decl (tree, tree, tree);
+extern tree finish_enum (tree, tree, tree);
+extern void finish_function (void);
+extern tree finish_struct (tree, tree, tree);
+extern struct c_arg_info *get_parm_info (bool);
+extern tree grokfield (struct c_declarator *, struct c_declspecs *,
+ tree, tree *);
+extern tree groktypename (struct c_type_name *);
+extern tree grokparm (const struct c_parm *);
+extern tree implicitly_declare (tree);
+extern void keep_next_level (void);
+extern void pending_xref_error (void);
+extern void c_push_function_context (struct function *);
+extern void c_pop_function_context (struct function *);
+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 void shadow_tag (const struct c_declspecs *);
+extern void shadow_tag_warned (const struct c_declspecs *, int);
+extern tree start_enum (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 (enum tree_code, tree);
+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 (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 (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 *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 tree c_objc_common_truthvalue_conversion (tree expr);
+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 about comparison of signed and unsigned values. */
+#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_sign_compare;
+/* in c-typeck.c */
+extern int in_alignof;
+extern int in_sizeof;
+extern int in_typeof;
+
+extern struct c_switch *c_switch_stack;
+extern struct c_label_context_se *label_context_stack_se;
+extern struct c_label_context_vm *label_context_stack_vm;
+
+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 (struct c_expr);
+extern tree composite_type (tree, tree);
+extern tree build_component_ref (tree, tree);
+extern tree build_array_ref (tree, tree);
+extern tree build_external_ref (tree, int, location_t);
+extern void pop_maybe_used (bool);
+extern struct c_expr c_expr_sizeof_expr (struct c_expr);
+extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
+extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr);
+extern struct c_expr parser_build_binary_op (enum tree_code, struct c_expr,
+ struct c_expr);
+extern tree build_conditional_expr (tree, tree, tree);
+extern tree build_compound_expr (tree, tree);
+extern tree c_cast_expr (struct c_type_name *, tree);
+extern tree build_c_cast (tree, tree);
+extern void store_init_value (tree, tree);
+extern void error_init (const char *);
+extern void pedwarn_init (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);
+extern struct c_expr pop_init_level (int);
+extern void set_init_index (tree, tree);
+extern void set_init_label (tree);
+extern void process_init_element (struct c_expr);
+extern tree build_compound_literal (tree, tree);
+extern tree c_start_case (tree);
+extern void c_finish_case (tree);
+extern tree build_asm_expr (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 (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 (tree);
+extern tree c_process_expr_stmt (tree);
+extern tree c_finish_expr_stmt (tree);
+extern tree c_finish_return (tree);
+extern tree c_finish_bc_stmt (tree *, bool);
+extern tree c_finish_goto_label (tree);
+extern tree c_finish_goto_ptr (tree);
+extern void c_begin_vm_scope (unsigned int);
+extern void c_end_vm_scope (unsigned int);
+extern tree c_expr_to_decl (tree, bool *, bool *, bool *);
+extern tree c_begin_omp_parallel (void);
+extern tree c_finish_omp_parallel (tree, tree);
+extern tree c_finish_omp_clauses (tree);
-/* Warn about testing equality of floating point numbers. */
+/* 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_float_equal;
+extern int current_function_returns_value;
-/* Warn about multicharacter constants. */
+/* Set to 0 at beginning of a function definition, set to 1 if
+ a return statement with no argument is seen. */
-extern int warn_multichar;
+extern int current_function_returns_null;
-/* Warn about long long. */
+/* Set to 0 at beginning of a function definition, set to 1 if
+ a call to a noreturn function is seen. */
-extern int warn_long_long;
+extern int current_function_returns_abnormally;
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
-/* Nonzero enables objc features. */
+/* 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;
-#define doing_objc_thang \
- (c_language == clk_objective_c)
+/* True means we've initialized exception handling. */
+extern bool c_eh_initialized_p;
/* 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 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
+extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
-#endif /* not _C_TREE_H */
+#endif /* ! GCC_C_TREE_H */