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c-parser.c
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c-parser.c
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/* Parser for C and Objective-C.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
Free Software Foundation, Inc.
Parser actions based on the old Bison parser; structure somewhat
influenced by and fragments based on the C++ parser.
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 3, or (at your option) any later
version.
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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* TODO:
Make sure all relevant comments, and all relevant code from all
actions, brought over from old parser. Verify exact correspondence
of syntax accepted.
Add testcases covering every input symbol in every state in old and
new parsers.
Include full syntax for GNU C, including erroneous cases accepted
with error messages, in syntax productions in comments.
Make more diagnostics in the front end generally take an explicit
location rather than implicitly using input_location. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "langhooks.h"
#include "input.h"
#include "cpplib.h"
#include "timevar.h"
#include "c-pragma.h"
#include "c-tree.h"
#include "flags.h"
#include "output.h"
#include "toplev.h"
#include "ggc.h"
#include "c-common.h"
#include "vec.h"
#include "target.h"
#include "cgraph.h"
#include "plugin.h"
#include "except.h"
/* Initialization routine for this file. */
void
c_parse_init (void)
{
/* The only initialization required is of the reserved word
identifiers. */
unsigned int i;
tree id;
int mask = 0;
/* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in
the c_token structure. */
gcc_assert (RID_MAX <= 255);
mask |= D_CXXONLY;
if (!flag_isoc99)
mask |= D_C99;
if (flag_no_asm)
{
mask |= D_ASM | D_EXT;
if (!flag_isoc99)
mask |= D_EXT89;
}
if (!c_dialect_objc ())
mask |= D_OBJC | D_CXX_OBJC;
ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
for (i = 0; i < num_c_common_reswords; i++)
{
/* If a keyword is disabled, do not enter it into the table
and so create a canonical spelling that isn't a keyword. */
if (c_common_reswords[i].disable & mask)
{
if (warn_cxx_compat
&& (c_common_reswords[i].disable & D_CXXWARN))
{
id = get_identifier (c_common_reswords[i].word);
C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN);
C_IS_RESERVED_WORD (id) = 1;
}
continue;
}
id = get_identifier (c_common_reswords[i].word);
C_SET_RID_CODE (id, c_common_reswords[i].rid);
C_IS_RESERVED_WORD (id) = 1;
ridpointers [(int) c_common_reswords[i].rid] = id;
}
}
/* The C lexer intermediates between the lexer in cpplib and c-lex.c
and the C parser. Unlike the C++ lexer, the parser structure
stores the lexer information instead of using a separate structure.
Identifiers are separated into ordinary identifiers, type names,
keywords and some other Objective-C types of identifiers, and some
look-ahead is maintained.
??? It might be a good idea to lex the whole file up front (as for
C++). It would then be possible to share more of the C and C++
lexer code, if desired. */
/* The following local token type is used. */
/* A keyword. */
#define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
/* More information about the type of a CPP_NAME token. */
typedef enum c_id_kind {
/* An ordinary identifier. */
C_ID_ID,
/* An identifier declared as a typedef name. */
C_ID_TYPENAME,
/* An identifier declared as an Objective-C class name. */
C_ID_CLASSNAME,
/* An address space identifier. */
C_ID_ADDRSPACE,
/* Not an identifier. */
C_ID_NONE
} c_id_kind;
/* A single C token after string literal concatenation and conversion
of preprocessing tokens to tokens. */
typedef struct GTY (()) c_token {
/* The kind of token. */
ENUM_BITFIELD (cpp_ttype) type : 8;
/* If this token is a CPP_NAME, this value indicates whether also
declared as some kind of type. Otherwise, it is C_ID_NONE. */
ENUM_BITFIELD (c_id_kind) id_kind : 8;
/* If this token is a keyword, this value indicates which keyword.
Otherwise, this value is RID_MAX. */
ENUM_BITFIELD (rid) keyword : 8;
/* If this token is a CPP_PRAGMA, this indicates the pragma that
was seen. Otherwise it is PRAGMA_NONE. */
ENUM_BITFIELD (pragma_kind) pragma_kind : 8;
/* The value associated with this token, if any. */
tree value;
/* The location at which this token was found. */
location_t location;
} c_token;
/* A parser structure recording information about the state and
context of parsing. Includes lexer information with up to two
tokens of look-ahead; more are not needed for C. */
typedef struct GTY(()) c_parser {
/* The look-ahead tokens. */
c_token tokens[2];
/* How many look-ahead tokens are available (0, 1 or 2). */
short tokens_avail;
/* True if a syntax error is being recovered from; false otherwise.
c_parser_error sets this flag. It should clear this flag when
enough tokens have been consumed to recover from the error. */
BOOL_BITFIELD error : 1;
/* True if we're processing a pragma, and shouldn't automatically
consume CPP_PRAGMA_EOL. */
BOOL_BITFIELD in_pragma : 1;
/* True if we're parsing the outermost block of an if statement. */
BOOL_BITFIELD in_if_block : 1;
/* True if we want to lex an untranslated string. */
BOOL_BITFIELD lex_untranslated_string : 1;
/* Objective-C specific parser/lexer information. */
BOOL_BITFIELD objc_pq_context : 1;
/* The following flag is needed to contextualize Objective-C lexical
analysis. In some cases (e.g., 'int NSObject;'), it is
undesirable to bind an identifier to an Objective-C class, even
if a class with that name exists. */
BOOL_BITFIELD objc_need_raw_identifier : 1;
} c_parser;
/* The actual parser and external interface. ??? Does this need to be
garbage-collected? */
static GTY (()) c_parser *the_parser;
/* Read in and lex a single token, storing it in *TOKEN. */
static void
c_lex_one_token (c_parser *parser, c_token *token)
{
timevar_push (TV_LEX);
token->type = c_lex_with_flags (&token->value, &token->location, NULL,
(parser->lex_untranslated_string
? C_LEX_STRING_NO_TRANSLATE : 0));
token->id_kind = C_ID_NONE;
token->keyword = RID_MAX;
token->pragma_kind = PRAGMA_NONE;
switch (token->type)
{
case CPP_NAME:
{
tree decl;
bool objc_force_identifier = parser->objc_need_raw_identifier;
if (c_dialect_objc ())
parser->objc_need_raw_identifier = false;
if (C_IS_RESERVED_WORD (token->value))
{
enum rid rid_code = C_RID_CODE (token->value);
if (rid_code == RID_CXX_COMPAT_WARN)
{
warning_at (token->location,
OPT_Wc___compat,
"identifier %qE conflicts with C++ keyword",
token->value);
}
else if (rid_code >= RID_FIRST_ADDR_SPACE
&& rid_code <= RID_LAST_ADDR_SPACE)
{
token->id_kind = C_ID_ADDRSPACE;
token->keyword = rid_code;
break;
}
else if (c_dialect_objc ())
{
if (!objc_is_reserved_word (token->value)
&& (!OBJC_IS_PQ_KEYWORD (rid_code)
|| parser->objc_pq_context))
{
/* Return the canonical spelling for this keyword. */
token->value = ridpointers[(int) rid_code];
token->type = CPP_KEYWORD;
token->keyword = rid_code;
break;
}
}
else
{
token->type = CPP_KEYWORD;
token->keyword = rid_code;
break;
}
}
decl = lookup_name (token->value);
if (decl)
{
if (TREE_CODE (decl) == TYPE_DECL)
{
token->id_kind = C_ID_TYPENAME;
break;
}
}
else if (c_dialect_objc ())
{
tree objc_interface_decl = objc_is_class_name (token->value);
/* Objective-C class names are in the same namespace as
variables and typedefs, and hence are shadowed by local
declarations. */
if (objc_interface_decl
&& (global_bindings_p ()
|| (!objc_force_identifier && !decl)))
{
token->value = objc_interface_decl;
token->id_kind = C_ID_CLASSNAME;
break;
}
}
token->id_kind = C_ID_ID;
}
break;
case CPP_AT_NAME:
/* This only happens in Objective-C; it must be a keyword. */
token->type = CPP_KEYWORD;
token->keyword = C_RID_CODE (token->value);
break;
case CPP_COLON:
case CPP_COMMA:
case CPP_CLOSE_PAREN:
case CPP_SEMICOLON:
/* These tokens may affect the interpretation of any identifiers
following, if doing Objective-C. */
if (c_dialect_objc ())
parser->objc_need_raw_identifier = false;
break;
case CPP_PRAGMA:
/* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value);
token->value = NULL;
break;
default:
break;
}
timevar_pop (TV_LEX);
}
/* Return a pointer to the next token from PARSER, reading it in if
necessary. */
static inline c_token *
c_parser_peek_token (c_parser *parser)
{
if (parser->tokens_avail == 0)
{
c_lex_one_token (parser, &parser->tokens[0]);
parser->tokens_avail = 1;
}
return &parser->tokens[0];
}
/* Return true if the next token from PARSER has the indicated
TYPE. */
static inline bool
c_parser_next_token_is (c_parser *parser, enum cpp_ttype type)
{
return c_parser_peek_token (parser)->type == type;
}
/* Return true if the next token from PARSER does not have the
indicated TYPE. */
static inline bool
c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type)
{
return !c_parser_next_token_is (parser, type);
}
/* Return true if the next token from PARSER is the indicated
KEYWORD. */
static inline bool
c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword)
{
return c_parser_peek_token (parser)->keyword == keyword;
}
/* Return true if TOKEN can start a type name,
false otherwise. */
static bool
c_token_starts_typename (c_token *token)
{
switch (token->type)
{
case CPP_NAME:
switch (token->id_kind)
{
case C_ID_ID:
return false;
case C_ID_ADDRSPACE:
return true;
case C_ID_TYPENAME:
return true;
case C_ID_CLASSNAME:
gcc_assert (c_dialect_objc ());
return true;
default:
gcc_unreachable ();
}
case CPP_KEYWORD:
switch (token->keyword)
{
case RID_UNSIGNED:
case RID_LONG:
case RID_SHORT:
case RID_SIGNED:
case RID_COMPLEX:
case RID_INT:
case RID_CHAR:
case RID_FLOAT:
case RID_DOUBLE:
case RID_VOID:
case RID_DFLOAT32:
case RID_DFLOAT64:
case RID_DFLOAT128:
case RID_BOOL:
case RID_ENUM:
case RID_STRUCT:
case RID_UNION:
case RID_TYPEOF:
case RID_CONST:
case RID_VOLATILE:
case RID_RESTRICT:
case RID_ATTRIBUTE:
case RID_FRACT:
case RID_ACCUM:
case RID_SAT:
return true;
default:
return false;
}
case CPP_LESS:
if (c_dialect_objc ())
return true;
return false;
default:
return false;
}
}
/* Return true if the next token from PARSER can start a type name,
false otherwise. */
static inline bool
c_parser_next_token_starts_typename (c_parser *parser)
{
c_token *token = c_parser_peek_token (parser);
return c_token_starts_typename (token);
}
/* Return true if TOKEN can start declaration specifiers, false
otherwise. */
static bool
c_token_starts_declspecs (c_token *token)
{
switch (token->type)
{
case CPP_NAME:
switch (token->id_kind)
{
case C_ID_ID:
return false;
case C_ID_ADDRSPACE:
return true;
case C_ID_TYPENAME:
return true;
case C_ID_CLASSNAME:
gcc_assert (c_dialect_objc ());
return true;
default:
gcc_unreachable ();
}
case CPP_KEYWORD:
switch (token->keyword)
{
case RID_STATIC:
case RID_EXTERN:
case RID_REGISTER:
case RID_TYPEDEF:
case RID_INLINE:
case RID_AUTO:
case RID_THREAD:
case RID_UNSIGNED:
case RID_LONG:
case RID_SHORT:
case RID_SIGNED:
case RID_COMPLEX:
case RID_INT:
case RID_CHAR:
case RID_FLOAT:
case RID_DOUBLE:
case RID_VOID:
case RID_DFLOAT32:
case RID_DFLOAT64:
case RID_DFLOAT128:
case RID_BOOL:
case RID_ENUM:
case RID_STRUCT:
case RID_UNION:
case RID_TYPEOF:
case RID_CONST:
case RID_VOLATILE:
case RID_RESTRICT:
case RID_ATTRIBUTE:
case RID_FRACT:
case RID_ACCUM:
case RID_SAT:
return true;
default:
return false;
}
case CPP_LESS:
if (c_dialect_objc ())
return true;
return false;
default:
return false;
}
}
/* Return true if the next token from PARSER can start declaration
specifiers, false otherwise. */
static inline bool
c_parser_next_token_starts_declspecs (c_parser *parser)
{
c_token *token = c_parser_peek_token (parser);
return c_token_starts_declspecs (token);
}
/* Return a pointer to the next-but-one token from PARSER, reading it
in if necessary. The next token is already read in. */
static c_token *
c_parser_peek_2nd_token (c_parser *parser)
{
if (parser->tokens_avail >= 2)
return &parser->tokens[1];
gcc_assert (parser->tokens_avail == 1);
gcc_assert (parser->tokens[0].type != CPP_EOF);
gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
c_lex_one_token (parser, &parser->tokens[1]);
parser->tokens_avail = 2;
return &parser->tokens[1];
}
/* Consume the next token from PARSER. */
static void
c_parser_consume_token (c_parser *parser)
{
gcc_assert (parser->tokens_avail >= 1);
gcc_assert (parser->tokens[0].type != CPP_EOF);
gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL);
gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA);
if (parser->tokens_avail == 2)
parser->tokens[0] = parser->tokens[1];
parser->tokens_avail--;
}
/* Expect the current token to be a #pragma. Consume it and remember
that we've begun parsing a pragma. */
static void
c_parser_consume_pragma (c_parser *parser)
{
gcc_assert (!parser->in_pragma);
gcc_assert (parser->tokens_avail >= 1);
gcc_assert (parser->tokens[0].type == CPP_PRAGMA);
if (parser->tokens_avail == 2)
parser->tokens[0] = parser->tokens[1];
parser->tokens_avail--;
parser->in_pragma = true;
}
/* Update the globals input_location and in_system_header from
TOKEN. */
static inline void
c_parser_set_source_position_from_token (c_token *token)
{
if (token->type != CPP_EOF)
{
input_location = token->location;
}
}
/* Issue a diagnostic of the form
FILE:LINE: MESSAGE before TOKEN
where TOKEN is the next token in the input stream of PARSER.
MESSAGE (specified by the caller) is usually of the form "expected
OTHER-TOKEN".
Do not issue a diagnostic if still recovering from an error.
??? This is taken from the C++ parser, but building up messages in
this way is not i18n-friendly and some other approach should be
used. */
static void
c_parser_error (c_parser *parser, const char *gmsgid)
{
c_token *token = c_parser_peek_token (parser);
if (parser->error)
return;
parser->error = true;
if (!gmsgid)
return;
/* This diagnostic makes more sense if it is tagged to the line of
the token we just peeked at. */
c_parser_set_source_position_from_token (token);
c_parse_error (gmsgid,
/* Because c_parse_error does not understand
CPP_KEYWORD, keywords are treated like
identifiers. */
(token->type == CPP_KEYWORD ? CPP_NAME : token->type),
/* ??? The C parser does not save the cpp flags of a
token, we need to pass 0 here and we will not get
the source spelling of some tokens but rather the
canonical spelling. */
token->value, /*flags=*/0);
}
/* If the next token is of the indicated TYPE, consume it. Otherwise,
issue the error MSGID. If MSGID is NULL then a message has already
been produced and no message will be produced this time. Returns
true if found, false otherwise. */
static bool
c_parser_require (c_parser *parser,
enum cpp_ttype type,
const char *msgid)
{
if (c_parser_next_token_is (parser, type))
{
c_parser_consume_token (parser);
return true;
}
else
{
c_parser_error (parser, msgid);
return false;
}
}
/* If the next token is the indicated keyword, consume it. Otherwise,
issue the error MSGID. Returns true if found, false otherwise. */
static bool
c_parser_require_keyword (c_parser *parser,
enum rid keyword,
const char *msgid)
{
if (c_parser_next_token_is_keyword (parser, keyword))
{
c_parser_consume_token (parser);
return true;
}
else
{
c_parser_error (parser, msgid);
return false;
}
}
/* Like c_parser_require, except that tokens will be skipped until the
desired token is found. An error message is still produced if the
next token is not as expected. If MSGID is NULL then a message has
already been produced and no message will be produced this
time. */
static void
c_parser_skip_until_found (c_parser *parser,
enum cpp_ttype type,
const char *msgid)
{
unsigned nesting_depth = 0;
if (c_parser_require (parser, type, msgid))
return;
/* Skip tokens until the desired token is found. */
while (true)
{
/* Peek at the next token. */
c_token *token = c_parser_peek_token (parser);
/* If we've reached the token we want, consume it and stop. */
if (token->type == type && !nesting_depth)
{
c_parser_consume_token (parser);
break;
}
/* If we've run out of tokens, stop. */
if (token->type == CPP_EOF)
return;
if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
return;
if (token->type == CPP_OPEN_BRACE
|| token->type == CPP_OPEN_PAREN
|| token->type == CPP_OPEN_SQUARE)
++nesting_depth;
else if (token->type == CPP_CLOSE_BRACE
|| token->type == CPP_CLOSE_PAREN
|| token->type == CPP_CLOSE_SQUARE)
{
if (nesting_depth-- == 0)
break;
}
/* Consume this token. */
c_parser_consume_token (parser);
}
parser->error = false;
}
/* Skip tokens until the end of a parameter is found, but do not
consume the comma, semicolon or closing delimiter. */
static void
c_parser_skip_to_end_of_parameter (c_parser *parser)
{
unsigned nesting_depth = 0;
while (true)
{
c_token *token = c_parser_peek_token (parser);
if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON)
&& !nesting_depth)
break;
/* If we've run out of tokens, stop. */
if (token->type == CPP_EOF)
return;
if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
return;
if (token->type == CPP_OPEN_BRACE
|| token->type == CPP_OPEN_PAREN
|| token->type == CPP_OPEN_SQUARE)
++nesting_depth;
else if (token->type == CPP_CLOSE_BRACE
|| token->type == CPP_CLOSE_PAREN
|| token->type == CPP_CLOSE_SQUARE)
{
if (nesting_depth-- == 0)
break;
}
/* Consume this token. */
c_parser_consume_token (parser);
}
parser->error = false;
}
/* Expect to be at the end of the pragma directive and consume an
end of line marker. */
static void
c_parser_skip_to_pragma_eol (c_parser *parser)
{
gcc_assert (parser->in_pragma);
parser->in_pragma = false;
if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line"))
while (true)
{
c_token *token = c_parser_peek_token (parser);
if (token->type == CPP_EOF)
break;
if (token->type == CPP_PRAGMA_EOL)
{
c_parser_consume_token (parser);
break;
}
c_parser_consume_token (parser);
}
parser->error = false;
}
/* Skip tokens until we have consumed an entire block, or until we
have consumed a non-nested ';'. */
static void
c_parser_skip_to_end_of_block_or_statement (c_parser *parser)
{
unsigned nesting_depth = 0;
bool save_error = parser->error;
while (true)
{
c_token *token;
/* Peek at the next token. */
token = c_parser_peek_token (parser);
switch (token->type)
{
case CPP_EOF:
return;
case CPP_PRAGMA_EOL:
if (parser->in_pragma)
return;
break;
case CPP_SEMICOLON:
/* If the next token is a ';', we have reached the
end of the statement. */
if (!nesting_depth)
{
/* Consume the ';'. */
c_parser_consume_token (parser);
goto finished;
}
break;
case CPP_CLOSE_BRACE:
/* If the next token is a non-nested '}', then we have
reached the end of the current block. */
if (nesting_depth == 0 || --nesting_depth == 0)
{
c_parser_consume_token (parser);
goto finished;
}
break;
case CPP_OPEN_BRACE:
/* If it the next token is a '{', then we are entering a new
block. Consume the entire block. */
++nesting_depth;
break;
case CPP_PRAGMA:
/* If we see a pragma, consume the whole thing at once. We
have some safeguards against consuming pragmas willy-nilly.
Normally, we'd expect to be here with parser->error set,
which disables these safeguards. But it's possible to get
here for secondary error recovery, after parser->error has
been cleared. */
c_parser_consume_pragma (parser);
c_parser_skip_to_pragma_eol (parser);
parser->error = save_error;
continue;
default:
break;
}
c_parser_consume_token (parser);
}
finished:
parser->error = false;
}
/* CPP's options (initialized by c-opts.c). */
extern cpp_options *cpp_opts;
/* Save the warning flags which are controlled by __extension__. */
static inline int
disable_extension_diagnostics (void)
{
int ret = (pedantic
| (warn_pointer_arith << 1)
| (warn_traditional << 2)
| (flag_iso << 3)
| (warn_long_long << 4)
| (warn_cxx_compat << 5));
cpp_opts->pedantic = pedantic = 0;
warn_pointer_arith = 0;
cpp_opts->warn_traditional = warn_traditional = 0;
flag_iso = 0;
cpp_opts->warn_long_long = warn_long_long = 0;
warn_cxx_compat = 0;
return ret;
}
/* Restore the warning flags which are controlled by __extension__.
FLAGS is the return value from disable_extension_diagnostics. */
static inline void
restore_extension_diagnostics (int flags)
{
cpp_opts->pedantic = pedantic = flags & 1;
warn_pointer_arith = (flags >> 1) & 1;
cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1;
flag_iso = (flags >> 3) & 1;
cpp_opts->warn_long_long = warn_long_long = (flags >> 4) & 1;
warn_cxx_compat = (flags >> 5) & 1;
}
/* Possibly kinds of declarator to parse. */
typedef enum c_dtr_syn {
/* A normal declarator with an identifier. */
C_DTR_NORMAL,
/* An abstract declarator (maybe empty). */
C_DTR_ABSTRACT,
/* A parameter declarator: may be either, but after a type name does
not redeclare a typedef name as an identifier if it can
alternatively be interpreted as a typedef name; see DR#009,
applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
following DR#249. For example, given a typedef T, "int T" and
"int *T" are valid parameter declarations redeclaring T, while
"int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
abstract declarators rather than involving redundant parentheses;
the same applies with attributes inside the parentheses before
"T". */
C_DTR_PARM
} c_dtr_syn;
static void c_parser_external_declaration (c_parser *);
static void c_parser_asm_definition (c_parser *);
static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, bool);
static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool,
bool);
static struct c_typespec c_parser_enum_specifier (c_parser *);
static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
static tree c_parser_struct_declaration (c_parser *);
static struct c_typespec c_parser_typeof_specifier (c_parser *);
static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn,
bool *);
static struct c_declarator *c_parser_direct_declarator (c_parser *, bool,
c_dtr_syn, bool *);
static struct c_declarator *c_parser_direct_declarator_inner (c_parser *,
bool,
struct c_declarator *);
static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree);
static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree);
static struct c_parm *c_parser_parameter_declaration (c_parser *, tree);
static tree c_parser_simple_asm_expr (c_parser *);
static tree c_parser_attributes (c_parser *);
static struct c_type_name *c_parser_type_name (c_parser *);
static struct c_expr c_parser_initializer (c_parser *);
static struct c_expr c_parser_braced_init (c_parser *, tree, bool);
static void c_parser_initelt (c_parser *);
static void c_parser_initval (c_parser *, struct c_expr *);
static tree c_parser_compound_statement (c_parser *);
static void c_parser_compound_statement_nostart (c_parser *);
static void c_parser_label (c_parser *);
static void c_parser_statement (c_parser *);
static void c_parser_statement_after_labels (c_parser *);
static void c_parser_if_statement (c_parser *);
static void c_parser_switch_statement (c_parser *);
static void c_parser_while_statement (c_parser *);
static void c_parser_do_statement (c_parser *);
static void c_parser_for_statement (c_parser *);
static tree c_parser_asm_statement (c_parser *);
static tree c_parser_asm_operands (c_parser *, bool);
static tree c_parser_asm_goto_operands (c_parser *);
static tree c_parser_asm_clobbers (c_parser *);
static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *);
static struct c_expr c_parser_conditional_expression (c_parser *,
struct c_expr *);
static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *);
static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *);
static struct c_expr c_parser_unary_expression (c_parser *);
static struct c_expr c_parser_sizeof_expression (c_parser *);
static struct c_expr c_parser_alignof_expression (c_parser *);
static struct c_expr c_parser_postfix_expression (c_parser *);
static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *,
struct c_type_name *,
location_t);
static struct c_expr c_parser_postfix_expression_after_primary (c_parser *,
location_t loc,
struct c_expr);
static struct c_expr c_parser_expression (c_parser *);
static struct c_expr c_parser_expression_conv (c_parser *);
static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool,
VEC(tree,gc) **);
static void c_parser_omp_construct (c_parser *);
static void c_parser_omp_threadprivate (c_parser *);
static void c_parser_omp_barrier (c_parser *);
static void c_parser_omp_flush (c_parser *);
static void c_parser_omp_taskwait (c_parser *);
enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
static bool c_parser_pragma (c_parser *, enum pragma_context);
/* These Objective-C parser functions are only ever called when
compiling Objective-C. */
static void c_parser_objc_class_definition (c_parser *);
static void c_parser_objc_class_instance_variables (c_parser *);
static void c_parser_objc_class_declaration (c_parser *);
static void c_parser_objc_alias_declaration (c_parser *);
static void c_parser_objc_protocol_definition (c_parser *);
static enum tree_code c_parser_objc_method_type (c_parser *);
static void c_parser_objc_method_definition (c_parser *);
static void c_parser_objc_methodprotolist (c_parser *);
static void c_parser_objc_methodproto (c_parser *);
static tree c_parser_objc_method_decl (c_parser *);
static tree c_parser_objc_type_name (c_parser *);
static tree c_parser_objc_protocol_refs (c_parser *);
static void c_parser_objc_try_catch_statement (c_parser *);
static void c_parser_objc_synchronized_statement (c_parser *);
static tree c_parser_objc_selector (c_parser *);
static tree c_parser_objc_selector_arg (c_parser *);
static tree c_parser_objc_receiver (c_parser *);
static tree c_parser_objc_message_args (c_parser *);
static tree c_parser_objc_keywordexpr (c_parser *);
/* Parse a translation unit (C90 6.7, C99 6.9).
translation-unit:
external-declarations
external-declarations:
external-declaration
external-declarations external-declaration
GNU extensions:
translation-unit:
empty
*/
static void
c_parser_translation_unit (c_parser *parser)
{
if (c_parser_next_token_is (parser, CPP_EOF))
{
pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
"ISO C forbids an empty translation unit");
}
else
{
void *obstack_position = obstack_alloc (&parser_obstack, 0);