File: [cvs.NetBSD.org] / src / usr.bin / xlint / lint1 / cgram.y (download)
Revision 1.160, Sun Jan 31 12:44:34 2021 UTC (3 years, 2 months ago) by rillig
Branch: MAIN
Changes since 1.159: +4 -4
lines
lint: don't warn about constant condition in 'do { } while (0)'
|
%{
/* $NetBSD: cgram.y,v 1.160 2021/01/31 12:44:34 rillig Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
* Copyright (c) 1994, 1995 Jochen Pohl
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jochen Pohl for
* The NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: cgram.y,v 1.160 2021/01/31 12:44:34 rillig Exp $");
#endif
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "lint1.h"
extern char *yytext;
/*
* Contains the level of current declaration, used for symbol table entries.
* 0 is the top-level, > 0 is inside a function body.
*/
int blklev;
/*
* level for memory allocation. Normally the same as blklev.
* An exception is the declaration of arguments in prototypes. Memory
* for these can't be freed after the declaration, but symbols must
* be removed from the symbol table after the declaration.
*/
int mblklev;
/*
* Save the no-warns state and restore it to avoid the problem where
* if (expr) { stmt } / * NOLINT * / stmt;
*/
static int olwarn = LWARN_BAD;
static int toicon(tnode_t *, int);
static void idecl(sym_t *, int, sbuf_t *);
static void ignore_up_to_rparen(void);
static sym_t *symbolrename(sym_t *, sbuf_t *);
#ifdef DEBUG
static void
CLEAR_WARN_FLAGS(const char *file, size_t line)
{
printf("%s, %d: clear flags %s %zu\n", curr_pos.p_file,
curr_pos.p_line, file, line);
clear_warn_flags();
olwarn = LWARN_BAD;
}
static void
SAVE_WARN_FLAGS(const char *file, size_t line)
{
lint_assert(olwarn == LWARN_BAD);
printf("%s, %d: save flags %s %zu = %d\n", curr_pos.p_file,
curr_pos.p_line, file, line, lwarn);
olwarn = lwarn;
}
static void
RESTORE_WARN_FLAGS(const char *file, size_t line)
{
if (olwarn != LWARN_BAD) {
lwarn = olwarn;
printf("%s, %d: restore flags %s %zu = %d\n", curr_pos.p_file,
curr_pos.p_line, file, line, lwarn);
olwarn = LWARN_BAD;
} else
CLEAR_WARN_FLAGS(file, line);
}
#define cgram_debug(fmt, args...) printf("cgram_debug: " fmt "\n", ##args)
#else
#define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD
#define SAVE_WARN_FLAGS(f, l) olwarn = lwarn
#define RESTORE_WARN_FLAGS(f, l) \
(void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn))
#define cgram_debug(fmt, args...) (void)0
#endif
/* unbind the anonymous struct members from the struct */
static void
anonymize(sym_t *s)
{
for ( ; s; s = s->s_next)
s->s_styp = NULL;
}
%}
%expect 138
%union {
int y_int;
val_t *y_val;
sbuf_t *y_sb;
sym_t *y_sym;
op_t y_op;
scl_t y_scl;
tspec_t y_tspec;
tqual_t y_tqual;
type_t *y_type;
tnode_t *y_tnode;
range_t y_range;
strg_t *y_string;
pqinf_t *y_pqinf;
};
%token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN
%token <y_op> T_MEMBACC
%token <y_op> T_UNARY
%token <y_op> T_INCDEC
%token T_SIZEOF
%token T_BUILTIN_OFFSETOF
%token T_TYPEOF
%token T_EXTENSION
%token T_ALIGNOF
%token <y_op> T_ASTERISK
%token <y_op> T_MULTIPLICATIVE
%token <y_op> T_ADDITIVE
%token <y_op> T_SHIFT
%token <y_op> T_RELATIONAL
%token <y_op> T_EQUALITY
%token <y_op> T_AMPER
%token <y_op> T_XOR
%token <y_op> T_BITOR
%token <y_op> T_LOGAND
%token <y_op> T_LOGOR
%token T_QUEST
%token T_COLON
%token <y_op> T_ASSIGN
%token <y_op> T_OPASSIGN
%token T_COMMA
%token T_SEMI
%token T_ELLIPSIS
%token T_REAL
%token T_IMAG
%token T_GENERIC
%token T_NORETURN
/* storage classes (extern, static, auto, register and typedef) */
%token <y_scl> T_SCLASS
/*
* predefined type keywords (char, int, short, long, unsigned, signed,
* float, double, void); see T_TYPENAME
*/
%token <y_tspec> T_TYPE
/* qualifiers (const, volatile, restrict, _Thread_local) */
%token <y_tqual> T_QUAL
/* struct or union */
%token <y_tspec> T_STRUCT_OR_UNION
/* remaining keywords */
%token T_ASM
%token T_BREAK
%token T_CASE
%token T_CONTINUE
%token T_DEFAULT
%token T_DO
%token T_ELSE
%token T_ENUM
%token T_FOR
%token T_GOTO
%token T_IF
%token T_PACKED
%token T_RETURN
%token T_SWITCH
%token T_SYMBOLRENAME
%token T_WHILE
/* Type Attributes */
%token <y_type> T_ATTRIBUTE
%token <y_type> T_AT_ALIAS
%token <y_type> T_AT_ALIGNED
%token <y_type> T_AT_ALLOC_SIZE
%token <y_type> T_AT_ALWAYS_INLINE
%token <y_type> T_AT_BOUNDED
%token <y_type> T_AT_BUFFER
%token <y_type> T_AT_COLD
%token <y_type> T_AT_CONSTRUCTOR
%token <y_type> T_AT_DEPRECATED
%token <y_type> T_AT_DESTRUCTOR
%token <y_type> T_AT_FORMAT
%token <y_type> T_AT_FORMAT_ARG
%token <y_type> T_AT_FORMAT_GNU_PRINTF
%token <y_type> T_AT_FORMAT_PRINTF
%token <y_type> T_AT_FORMAT_SCANF
%token <y_type> T_AT_FORMAT_STRFMON
%token <y_type> T_AT_FORMAT_STRFTIME
%token <y_type> T_AT_FORMAT_SYSLOG
%token <y_type> T_AT_GNU_INLINE
%token <y_type> T_AT_MALLOC
%token <y_type> T_AT_MAY_ALIAS
%token <y_type> T_AT_MINBYTES
%token <y_type> T_AT_MODE
%token <y_type> T_AT_NOINLINE
%token <y_type> T_AT_NONNULL
%token <y_type> T_AT_NORETURN
%token <y_type> T_AT_NOTHROW
%token <y_type> T_AT_NO_INSTRUMENT_FUNCTION
%token <y_type> T_AT_OPTIMIZE
%token <y_type> T_AT_PACKED
%token <y_type> T_AT_PCS
%token <y_type> T_AT_PURE
%token <y_type> T_AT_RETURNS_TWICE
%token <y_type> T_AT_SECTION
%token <y_type> T_AT_SENTINEL
%token <y_type> T_AT_STRING
%token <y_type> T_AT_TLS_MODEL
%token <y_type> T_AT_TUNION
%token <y_type> T_AT_UNUSED
%token <y_type> T_AT_USED
%token <y_type> T_AT_VISIBILITY
%token <y_type> T_AT_WARN_UNUSED_RESULT
%token <y_type> T_AT_WEAK
%left T_COMMA
%right T_ASSIGN T_OPASSIGN
%right T_QUEST T_COLON
%left T_LOGOR
%left T_LOGAND
%left T_BITOR
%left T_XOR
%left T_AMPER
%left T_EQUALITY
%left T_RELATIONAL
%left T_SHIFT
%left T_ADDITIVE
%left T_ASTERISK T_MULTIPLICATIVE
%right T_UNARY T_INCDEC T_SIZEOF T_BUILTIN_OFFSETOF T_ALIGNOF T_REAL T_IMAG
%left T_LPAREN T_LBRACK T_MEMBACC
%token <y_sb> T_NAME
%token <y_sb> T_TYPENAME
%token <y_val> T_CON
%token <y_string> T_STRING
%type <y_sym> func_decl
%type <y_sym> notype_decl
%type <y_sym> type_decl
%type <y_type> typespec
%type <y_type> clrtyp_typespec
%type <y_type> notype_typespec
%type <y_type> struct_spec
%type <y_type> enum_spec
%type <y_type> type_attribute
%type <y_sym> struct_tag
%type <y_sym> enum_tag
%type <y_tspec> struct
%type <y_sym> struct_declaration
%type <y_sb> identifier
%type <y_sym> member_declaration_list_with_rbrace
%type <y_sym> member_declaration_list
%type <y_sym> member_declaration
%type <y_sym> notype_member_decls
%type <y_sym> type_member_decls
%type <y_sym> notype_member_decl
%type <y_sym> type_member_decl
%type <y_tnode> constant
%type <y_sym> enum_declaration
%type <y_sym> enums_with_opt_comma
%type <y_sym> enums
%type <y_sym> enumerator
%type <y_sym> enumeration_constant
%type <y_sym> notype_direct_decl
%type <y_sym> type_direct_decl
%type <y_pqinf> pointer
%type <y_pqinf> asterisk
%type <y_sym> param_decl
%type <y_sym> param_list
%type <y_sym> abstract_decl_param_list
%type <y_sym> direct_param_decl
%type <y_sym> notype_param_decl
%type <y_sym> direct_notype_param_decl
%type <y_pqinf> type_qualifier_list
%type <y_pqinf> type_qualifier
%type <y_sym> identifier_list
%type <y_sym> abstract_decl
%type <y_sym> direct_abstract_decl
%type <y_sym> vararg_parameter_type_list
%type <y_sym> parameter_type_list
%type <y_sym> parameter_declaration
%type <y_tnode> expr
%type <y_tnode> expr_statement_val
%type <y_tnode> expr_statement_list
%type <y_tnode> term
%type <y_tnode> generic_expr
%type <y_tnode> func_arg_list
%type <y_op> point_or_arrow
%type <y_type> type_name
%type <y_sym> abstract_declaration
%type <y_tnode> do_while_expr
%type <y_tnode> opt_expr
%type <y_string> string
%type <y_string> string2
%type <y_sb> opt_asm_or_symbolrename
%type <y_range> range
%type <y_range> low_range
%%
program:
/* empty */ {
if (sflag) {
/* empty translation unit */
error(272);
} else if (!tflag) {
/* empty translation unit */
warning(272);
}
}
| translation_unit
;
translation_unit: /* C99 6.9 */
external_declaration
| translation_unit external_declaration
;
external_declaration: /* C99 6.9 */
asm_statement
| function_definition {
global_clean_up_decl(0);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
| data_def {
global_clean_up_decl(0);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
data_def:
T_SEMI {
if (sflag) {
/* empty declaration */
error(0);
} else if (!tflag) {
/* empty declaration */
warning(0);
}
}
| clrtyp deftyp notype_init_decls T_SEMI {
if (sflag) {
/* old style declaration; add 'int' */
error(1);
} else if (!tflag) {
/* old style declaration; add 'int' */
warning(1);
}
}
| declmods deftyp T_SEMI {
if (dcs->d_scl == TYPEDEF) {
/* typedef declares no type name */
warning(72);
} else {
/* empty declaration */
warning(2);
}
}
| declmods deftyp notype_init_decls T_SEMI
| declspecs deftyp T_SEMI {
if (dcs->d_scl == TYPEDEF) {
/* typedef declares no type name */
warning(72);
} else if (!dcs->d_nedecl) {
/* empty declaration */
warning(2);
}
}
| declspecs deftyp type_init_decls T_SEMI
| error T_SEMI {
global_clean_up();
}
| error T_RBRACE {
global_clean_up();
}
;
function_definition: /* C99 6.9.1 */
func_decl {
if ($1->s_type->t_tspec != FUNC) {
/* syntax error '%s' */
error(249, yytext);
YYERROR;
}
if ($1->s_type->t_typedef) {
/* ()-less function definition */
error(64);
YYERROR;
}
funcdef($1);
blklev++;
pushdecl(ARG);
if (lwarn == LWARN_NONE)
$1->s_used = true;
} arg_declaration_list_opt {
popdecl();
blklev--;
check_func_lint_directives();
check_func_old_style_arguments();
pushctrl(0);
} compound_statement {
funcend();
popctrl(0);
}
;
func_decl:
clrtyp deftyp notype_decl {
$$ = $3;
}
| declmods deftyp notype_decl {
$$ = $3;
}
| declspecs deftyp type_decl {
$$ = $3;
}
;
arg_declaration_list_opt:
/* empty */
| arg_declaration_list
;
arg_declaration_list:
arg_declaration
| arg_declaration_list arg_declaration
/* XXX or better "arg_declaration error" ? */
| error
;
/*
* "arg_declaration" is separated from "declaration" because it
* needs other error handling.
*/
arg_declaration:
declmods deftyp T_SEMI {
/* empty declaration */
warning(2);
}
| declmods deftyp notype_init_decls T_SEMI
| declspecs deftyp T_SEMI {
if (!dcs->d_nedecl) {
/* empty declaration */
warning(2);
} else {
/* '%s' declared in argument declaration list */
warning(3, type_name(dcs->d_type));
}
}
| declspecs deftyp type_init_decls T_SEMI {
if (dcs->d_nedecl) {
/* '%s' declared in argument declaration list */
warning(3, type_name(dcs->d_type));
}
}
| declmods error
| declspecs error
;
declaration:
declmods deftyp T_SEMI {
if (dcs->d_scl == TYPEDEF) {
/* typedef declares no type name */
warning(72);
} else {
/* empty declaration */
warning(2);
}
}
| declmods deftyp notype_init_decls T_SEMI
| declspecs deftyp T_SEMI {
if (dcs->d_scl == TYPEDEF) {
/* typedef declares no type name */
warning(72);
} else if (!dcs->d_nedecl) {
/* empty declaration */
warning(2);
}
}
| declspecs deftyp type_init_decls T_SEMI
| error T_SEMI
;
type_attribute_format_type:
T_AT_FORMAT_GNU_PRINTF
| T_AT_FORMAT_PRINTF
| T_AT_FORMAT_SCANF
| T_AT_FORMAT_STRFMON
| T_AT_FORMAT_STRFTIME
| T_AT_FORMAT_SYSLOG
;
type_attribute_bounded_type:
T_AT_MINBYTES
| T_AT_STRING
| T_AT_BUFFER
;
type_attribute_spec:
/* empty */
| T_AT_DEPRECATED T_LPAREN string T_RPAREN
| T_AT_DEPRECATED
| T_AT_ALIGNED T_LPAREN constant T_RPAREN
| T_AT_ALLOC_SIZE T_LPAREN constant T_COMMA constant T_RPAREN
| T_AT_ALLOC_SIZE T_LPAREN constant T_RPAREN
| T_AT_BOUNDED T_LPAREN type_attribute_bounded_type
T_COMMA constant T_COMMA constant T_RPAREN
| T_AT_SENTINEL T_LPAREN constant T_RPAREN
| T_AT_SENTINEL
| T_AT_FORMAT_ARG T_LPAREN constant T_RPAREN
| T_AT_NONNULL T_LPAREN constant T_RPAREN
| T_AT_MODE T_LPAREN T_NAME T_RPAREN
| T_AT_ALIAS T_LPAREN string T_RPAREN
| T_AT_OPTIMIZE T_LPAREN string T_RPAREN
| T_AT_PCS T_LPAREN string T_RPAREN
| T_AT_SECTION T_LPAREN string T_RPAREN
| T_AT_TLS_MODEL T_LPAREN string T_RPAREN
| T_AT_ALIGNED
| T_AT_CONSTRUCTOR
| T_AT_DESTRUCTOR
| T_AT_MALLOC
| T_AT_MAY_ALIAS
| T_AT_NO_INSTRUMENT_FUNCTION
| T_AT_NOINLINE
| T_AT_NORETURN
| T_AT_NOTHROW
| T_AT_COLD
| T_AT_RETURNS_TWICE
| T_AT_PACKED {
addpacked();
}
| T_AT_PURE
| T_AT_TUNION
| T_AT_GNU_INLINE
| T_AT_ALWAYS_INLINE
| T_AT_FORMAT T_LPAREN type_attribute_format_type T_COMMA
constant T_COMMA constant T_RPAREN
| T_AT_USED {
add_attr_used();
}
| T_AT_UNUSED {
add_attr_used();
}
| T_AT_WARN_UNUSED_RESULT
| T_AT_WEAK
| T_AT_VISIBILITY T_LPAREN constant T_RPAREN
| T_QUAL {
if ($1 != CONST)
yyerror("Bad attribute");
}
;
type_attribute_spec_list:
type_attribute_spec
| type_attribute_spec_list T_COMMA type_attribute_spec
;
type_attribute:
T_ATTRIBUTE T_LPAREN T_LPAREN {
attron = true;
} type_attribute_spec_list {
attron = false;
} T_RPAREN T_RPAREN
| T_PACKED {
addpacked();
}
| T_NORETURN {
}
;
type_attribute_list:
type_attribute
| type_attribute_list type_attribute
;
clrtyp:
/* empty */ {
clrtyp();
}
;
deftyp:
/* empty */ {
deftyp();
}
;
declspecs:
clrtyp_typespec {
add_type($1);
}
| declmods typespec {
add_type($2);
}
| type_attribute declspecs
| declspecs declmod
| declspecs notype_typespec {
add_type($2);
}
;
declmods:
clrtyp T_QUAL {
add_qualifier($2);
}
| clrtyp T_SCLASS {
add_storage_class($2);
}
| declmods declmod
;
declmod:
T_QUAL {
add_qualifier($1);
}
| T_SCLASS {
add_storage_class($1);
}
| type_attribute_list
;
clrtyp_typespec:
clrtyp notype_typespec {
$$ = $2;
}
| T_TYPENAME clrtyp {
$$ = getsym($1)->s_type;
}
;
typespec:
notype_typespec {
$$ = $1;
}
| T_TYPENAME {
$$ = getsym($1)->s_type;
}
;
notype_typespec:
T_TYPE {
$$ = gettyp($1);
}
| T_TYPEOF term {
$$ = $2->tn_type;
}
| struct_spec {
popdecl();
$$ = $1;
}
| enum_spec {
popdecl();
$$ = $1;
}
;
struct_spec:
struct struct_tag {
/*
* STDC requires that "struct a;" always introduces
* a new tag if "a" is not declared at current level
*
* yychar is valid because otherwise the parser would not
* have been able to decide if it must shift or reduce
*/
$$ = mktag($2, $1, 0, yychar == T_SEMI);
}
| struct struct_tag {
dcs->d_tagtyp = mktag($2, $1, 1, 0);
} struct_declaration {
$$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4);
}
| struct {
dcs->d_tagtyp = mktag(NULL, $1, 1, 0);
} struct_declaration {
$$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3);
}
| struct error {
symtyp = FVFT;
$$ = gettyp(INT);
}
;
struct:
struct type_attribute
| T_STRUCT_OR_UNION {
symtyp = FTAG;
pushdecl($1 == STRUCT ? MOS : MOU);
dcs->d_offset = 0;
dcs->d_stralign = CHAR_SIZE;
$$ = $1;
}
;
struct_tag:
identifier {
$$ = getsym($1);
}
;
struct_declaration:
struct_decl_lbrace member_declaration_list_with_rbrace {
$$ = $2;
}
;
struct_decl_lbrace:
T_LBRACE {
symtyp = FVFT;
}
;
member_declaration_list_with_rbrace:
member_declaration_list T_SEMI T_RBRACE {
$$ = $1;
}
| member_declaration_list T_RBRACE {
if (sflag) {
/* syntax req. ';' after last struct/union member */
error(66);
} else {
/* syntax req. ';' after last struct/union member */
warning(66);
}
$$ = $1;
}
| T_RBRACE {
$$ = NULL;
}
;
opt_type_attribute:
/* empty */
| type_attribute
;
member_declaration_list:
member_declaration {
$$ = $1;
}
| member_declaration_list T_SEMI member_declaration {
$$ = lnklst($1, $3);
}
;
member_declaration:
noclass_declmods deftyp {
/* too late, i know, but getsym() compensates it */
symtyp = FMEMBER;
} notype_member_decls opt_type_attribute {
symtyp = FVFT;
$$ = $4;
}
| noclass_declspecs deftyp {
symtyp = FMEMBER;
} type_member_decls opt_type_attribute {
symtyp = FVFT;
$$ = $4;
}
| noclass_declmods deftyp opt_type_attribute {
symtyp = FVFT;
/* struct or union member must be named */
if (!Sflag)
/* anonymous struct/union members is a C9X feature */
warning(49);
/* add all the members of the anonymous struct/union */
$$ = dcs->d_type->t_str->memb;
anonymize($$);
}
| noclass_declspecs deftyp opt_type_attribute {
symtyp = FVFT;
/* struct or union member must be named */
if (!Sflag)
/* anonymous struct/union members is a C9X feature */
warning(49);
$$ = dcs->d_type->t_str->memb;
/* add all the members of the anonymous struct/union */
anonymize($$);
}
| error {
symtyp = FVFT;
$$ = NULL;
}
;
noclass_declspecs:
clrtyp_typespec {
add_type($1);
}
| type_attribute noclass_declspecs
| noclass_declmods typespec {
add_type($2);
}
| noclass_declspecs T_QUAL {
add_qualifier($2);
}
| noclass_declspecs notype_typespec {
add_type($2);
}
| noclass_declspecs type_attribute
;
noclass_declmods:
clrtyp T_QUAL {
add_qualifier($2);
}
| noclass_declmods T_QUAL {
add_qualifier($2);
}
;
notype_member_decls:
notype_member_decl {
$$ = declarator_1_struct_union($1);
}
| notype_member_decls {
symtyp = FMEMBER;
} T_COMMA type_member_decl {
$$ = lnklst($1, declarator_1_struct_union($4));
}
;
type_member_decls:
type_member_decl {
$$ = declarator_1_struct_union($1);
}
| type_member_decls {
symtyp = FMEMBER;
} T_COMMA type_member_decl {
$$ = lnklst($1, declarator_1_struct_union($4));
}
;
notype_member_decl:
notype_decl {
$$ = $1;
}
| notype_decl T_COLON constant {
$$ = bitfield($1, toicon($3, 1));
}
| {
symtyp = FVFT;
} T_COLON constant {
$$ = bitfield(NULL, toicon($3, 1));
}
;
type_member_decl:
type_decl {
$$ = $1;
}
| type_decl T_COLON constant {
$$ = bitfield($1, toicon($3, 1));
}
| {
symtyp = FVFT;
} T_COLON constant {
$$ = bitfield(NULL, toicon($3, 1));
}
;
enum_spec:
enum enum_tag {
$$ = mktag($2, ENUM, 0, 0);
}
| enum enum_tag {
dcs->d_tagtyp = mktag($2, ENUM, 1, 0);
} enum_declaration {
$$ = complete_tag_enum(dcs->d_tagtyp, $4);
}
| enum {
dcs->d_tagtyp = mktag(NULL, ENUM, 1, 0);
} enum_declaration {
$$ = complete_tag_enum(dcs->d_tagtyp, $3);
}
| enum error {
symtyp = FVFT;
$$ = gettyp(INT);
}
;
enum:
T_ENUM {
symtyp = FTAG;
pushdecl(CTCONST);
}
;
enum_tag:
identifier {
$$ = getsym($1);
}
;
enum_declaration:
enum_decl_lbrace enums_with_opt_comma T_RBRACE {
$$ = $2;
}
;
enum_decl_lbrace:
T_LBRACE {
symtyp = FVFT;
enumval = 0;
}
;
enums_with_opt_comma:
enums {
$$ = $1;
}
| enums T_COMMA {
if (sflag) {
/* trailing ',' prohibited in enum declaration */
error(54);
} else {
/* trailing ',' prohibited in enum declaration */
c99ism(54);
}
$$ = $1;
}
;
enums:
enumerator {
$$ = $1;
}
| enums T_COMMA enumerator {
$$ = lnklst($1, $3);
}
| error {
$$ = NULL;
}
;
enumerator:
enumeration_constant {
$$ = enumeration_constant($1, enumval, 1);
}
| enumeration_constant T_ASSIGN constant {
$$ = enumeration_constant($1, toicon($3, 1), 0);
}
;
enumeration_constant: /* C99 6.4.4.3 */
identifier {
$$ = getsym($1);
}
;
notype_init_decls:
notype_init_decl
| notype_init_decls T_COMMA type_init_decl
;
type_init_decls:
type_init_decl
| type_init_decls T_COMMA type_init_decl
;
notype_init_decl:
notype_decl opt_asm_or_symbolrename {
idecl($1, 0, $2);
check_size($1);
}
| notype_decl opt_asm_or_symbolrename {
idecl($1, 1, $2);
} T_ASSIGN initializer {
check_size($1);
}
;
type_init_decl:
type_decl opt_asm_or_symbolrename {
idecl($1, 0, $2);
check_size($1);
}
| type_decl opt_asm_or_symbolrename {
idecl($1, 1, $2);
} T_ASSIGN initializer {
check_size($1);
}
;
notype_decl:
notype_direct_decl {
$$ = $1;
}
| pointer notype_direct_decl {
$$ = add_pointer($2, $1);
}
;
notype_direct_decl:
T_NAME {
$$ = declarator_name(getsym($1));
}
| T_LPAREN type_decl T_RPAREN {
$$ = $2;
}
| type_attribute notype_direct_decl {
$$ = $2;
}
| notype_direct_decl T_LBRACK T_RBRACK {
$$ = add_array($1, 0, 0);
}
| notype_direct_decl T_LBRACK constant T_RBRACK {
$$ = add_array($1, 1, toicon($3, 0));
}
| notype_direct_decl param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename($1, $3), $2);
popdecl();
blklev--;
}
| notype_direct_decl type_attribute_list
;
type_decl:
type_direct_decl {
$$ = $1;
}
| pointer type_direct_decl {
$$ = add_pointer($2, $1);
}
;
type_direct_decl:
identifier {
$$ = declarator_name(getsym($1));
}
| T_LPAREN type_decl T_RPAREN {
$$ = $2;
}
| type_attribute type_direct_decl {
$$ = $2;
}
| type_direct_decl T_LBRACK T_RBRACK {
$$ = add_array($1, 0, 0);
}
| type_direct_decl T_LBRACK constant T_RBRACK {
$$ = add_array($1, 1, toicon($3, 0));
}
| type_direct_decl param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename($1, $3), $2);
popdecl();
blklev--;
}
| type_direct_decl type_attribute_list
;
/*
* param_decl and notype_param_decl exist to avoid a conflict in
* argument lists. A typename enclosed in parens should always be
* treated as a typename, not an argument.
* "typedef int a; f(int (a));" is "typedef int a; f(int foo(a));"
* not "typedef int a; f(int a);"
*/
param_decl:
direct_param_decl {
$$ = $1;
}
| pointer direct_param_decl {
$$ = add_pointer($2, $1);
}
;
direct_param_decl:
identifier type_attribute_list {
$$ = declarator_name(getsym($1));
}
| identifier {
$$ = declarator_name(getsym($1));
}
| T_LPAREN notype_param_decl T_RPAREN {
$$ = $2;
}
| direct_param_decl T_LBRACK T_RBRACK {
$$ = add_array($1, 0, 0);
}
| direct_param_decl T_LBRACK constant T_RBRACK {
$$ = add_array($1, 1, toicon($3, 0));
}
| direct_param_decl param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename($1, $3), $2);
popdecl();
blklev--;
}
;
notype_param_decl:
direct_notype_param_decl {
$$ = $1;
}
| pointer direct_notype_param_decl {
$$ = add_pointer($2, $1);
}
;
direct_notype_param_decl:
identifier {
$$ = declarator_name(getsym($1));
}
| T_LPAREN notype_param_decl T_RPAREN {
$$ = $2;
}
| direct_notype_param_decl T_LBRACK T_RBRACK {
$$ = add_array($1, 0, 0);
}
| direct_notype_param_decl T_LBRACK constant T_RBRACK {
$$ = add_array($1, 1, toicon($3, 0));
}
| direct_notype_param_decl param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename($1, $3), $2);
popdecl();
blklev--;
}
;
pointer:
asterisk {
$$ = $1;
}
| asterisk type_qualifier_list {
$$ = merge_pointers_and_qualifiers($1, $2);
}
| asterisk pointer {
$$ = merge_pointers_and_qualifiers($1, $2);
}
| asterisk type_qualifier_list pointer {
$$ = merge_pointers_and_qualifiers($1, $2);
$$ = merge_pointers_and_qualifiers($$, $3);
}
;
asterisk:
T_ASTERISK {
$$ = xcalloc(1, sizeof (pqinf_t));
$$->p_pcnt = 1;
}
;
type_qualifier_list:
type_qualifier {
$$ = $1;
}
| type_qualifier_list type_qualifier {
$$ = merge_pointers_and_qualifiers($1, $2);
}
;
type_qualifier:
T_QUAL {
$$ = xcalloc(1, sizeof (pqinf_t));
if ($1 == CONST) {
$$->p_const = true;
} else if ($1 == VOLATILE) {
$$->p_volatile = true;
} else {
lint_assert($1 == RESTRICT || $1 == THREAD);
}
}
;
param_list:
id_list_lparn identifier_list T_RPAREN {
$$ = $2;
}
| abstract_decl_param_list {
$$ = $1;
}
;
id_list_lparn:
T_LPAREN {
blklev++;
pushdecl(PARG);
}
;
identifier_list:
T_NAME {
$$ = old_style_function_name(getsym($1));
}
| identifier_list T_COMMA T_NAME {
$$ = lnklst($1, old_style_function_name(getsym($3)));
}
| identifier_list error {
$$ = $1;
}
;
abstract_decl_param_list:
abstract_decl_lparn T_RPAREN {
$$ = NULL;
}
| abstract_decl_lparn vararg_parameter_type_list T_RPAREN {
dcs->d_proto = true;
$$ = $2;
}
| abstract_decl_lparn error T_RPAREN {
$$ = NULL;
}
;
abstract_decl_lparn:
T_LPAREN {
blklev++;
pushdecl(PARG);
}
;
vararg_parameter_type_list:
parameter_type_list {
$$ = $1;
}
| parameter_type_list T_COMMA T_ELLIPSIS {
dcs->d_vararg = true;
$$ = $1;
}
| T_ELLIPSIS {
if (sflag) {
/* ANSI C requires formal parameter before '...' */
error(84);
} else if (!tflag) {
/* ANSI C requires formal parameter before '...' */
warning(84);
}
dcs->d_vararg = true;
$$ = NULL;
}
;
parameter_type_list:
parameter_declaration {
$$ = $1;
}
| parameter_type_list T_COMMA parameter_declaration {
$$ = lnklst($1, $3);
}
;
parameter_declaration:
declmods deftyp {
$$ = declare_argument(abstract_name(), 0);
}
| declspecs deftyp {
$$ = declare_argument(abstract_name(), 0);
}
| declmods deftyp notype_param_decl {
$$ = declare_argument($3, 0);
}
/*
* param_decl is needed because of following conflict:
* "typedef int a; f(int (a));" could be parsed as
* "function with argument a of type int", or
* "function with an abstract argument of type function".
* This grammar realizes the second case.
*/
| declspecs deftyp param_decl {
$$ = declare_argument($3, 0);
}
| declmods deftyp abstract_decl {
$$ = declare_argument($3, 0);
}
| declspecs deftyp abstract_decl {
$$ = declare_argument($3, 0);
}
;
opt_asm_or_symbolrename: /* expect only one */
/* empty */ {
$$ = NULL;
}
| T_ASM T_LPAREN T_STRING T_RPAREN {
freeyyv(&$3, T_STRING);
$$ = NULL;
}
| T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN {
$$ = $3;
}
;
initializer:
{
cgram_debug("begin initializer");
} init_assign_expr {
cgram_debug("end initializer");
}
;
init_assign_expr:
| init_by_name init_base_expr %prec T_COMMA
| init_base_expr
init_base_expr:
expr %prec T_COMMA {
mkinit($1);
}
| init_lbrace init_rbrace
| init_lbrace init_expr_list init_rbrace
| init_lbrace init_expr_list T_COMMA init_rbrace
| error
;
init_expr_list:
init_assign_expr %prec T_COMMA
| init_expr_list T_COMMA init_assign_expr
;
low_range:
constant T_ELLIPSIS {
$$.lo = toicon($1, 1);
}
;
range:
constant {
$$.lo = toicon($1, 1);
$$.hi = $$.lo + 1;
}
| low_range constant {
$$.lo = $1.lo;
$$.hi = toicon($2, 1);
}
;
init_field:
T_LBRACK range T_RBRACK {
if (!Sflag)
/* array initializer with des.s is a C9X feature */
warning(321);
}
| point identifier {
if (!Sflag)
/* struct or union member name in initializer is ... */
warning(313);
push_member($2);
}
;
init_field_list:
init_field
| init_field_list init_field
;
init_by_name:
init_field_list T_ASSIGN
| identifier T_COLON {
/* GCC style struct or union member name in initializer */
gnuism(315);
push_member($1);
}
;
init_lbrace:
T_LBRACE {
init_lbrace();
}
;
init_rbrace:
T_RBRACE {
init_rbrace();
}
;
type_name:
{
pushdecl(ABSTRACT);
} abstract_declaration {
popdecl();
$$ = $2->s_type;
}
;
abstract_declaration:
noclass_declmods deftyp {
$$ = declare_1_abstract(abstract_name());
}
| noclass_declspecs deftyp {
$$ = declare_1_abstract(abstract_name());
}
| noclass_declmods deftyp abstract_decl {
$$ = declare_1_abstract($3);
}
| noclass_declspecs deftyp abstract_decl {
$$ = declare_1_abstract($3);
}
;
abstract_decl:
pointer {
$$ = add_pointer(abstract_name(), $1);
}
| direct_abstract_decl {
$$ = $1;
}
| pointer direct_abstract_decl {
$$ = add_pointer($2, $1);
}
| T_TYPEOF term {
$$ = mktempsym($2->tn_type);
}
;
direct_abstract_decl:
T_LPAREN abstract_decl T_RPAREN {
$$ = $2;
}
| T_LBRACK T_RBRACK {
$$ = add_array(abstract_name(), 0, 0);
}
| T_LBRACK constant T_RBRACK {
$$ = add_array(abstract_name(), 1, toicon($2, 0));
}
| type_attribute direct_abstract_decl {
$$ = $2;
}
| direct_abstract_decl T_LBRACK T_RBRACK {
$$ = add_array($1, 0, 0);
}
| direct_abstract_decl T_LBRACK constant T_RBRACK {
$$ = add_array($1, 1, toicon($3, 0));
}
| abstract_decl_param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename(abstract_name(), $2), $1);
popdecl();
blklev--;
}
| direct_abstract_decl abstract_decl_param_list opt_asm_or_symbolrename {
$$ = add_function(symbolrename($1, $3), $2);
popdecl();
blklev--;
}
| direct_abstract_decl type_attribute_list
;
non_expr_statement:
labeled_statement
| compound_statement
| selection_statement
| iteration_statement
| jump_statement {
ftflg = false;
}
| asm_statement
statement: /* C99 6.8 */
expr_statement
| non_expr_statement
;
labeled_statement: /* C99 6.8.1 */
label statement
;
label:
T_NAME T_COLON {
symtyp = FLABEL;
named_label(getsym($1));
}
| T_CASE constant T_COLON {
case_label($2);
ftflg = true;
}
| T_CASE constant T_ELLIPSIS constant T_COLON {
/* XXX: We don't fill all cases */
case_label($2);
ftflg = true;
}
| T_DEFAULT T_COLON {
default_label();
ftflg = true;
}
;
statement_d_list:
statement_list
| statement_d_list declaration_list statement_list {
if (!Sflag)
/* declarations after statements is a C9X feature */
c99ism(327);
}
;
compound_statement: /* C99 6.8.2 */
compound_statement_lbrace compound_statement_rbrace
| compound_statement_lbrace statement_d_list compound_statement_rbrace
| compound_statement_lbrace declaration_list compound_statement_rbrace
| compound_statement_lbrace declaration_list statement_d_list
compound_statement_rbrace
;
compound_statement_lbrace:
T_LBRACE {
blklev++;
mblklev++;
pushdecl(AUTO);
}
;
compound_statement_rbrace:
T_RBRACE {
popdecl();
freeblk();
mblklev--;
blklev--;
ftflg = false;
}
;
statement_list:
statement
| statement_list statement {
RESTORE_WARN_FLAGS(__FILE__, __LINE__);
}
| statement_list error T_SEMI
;
expr_statement:
expr T_SEMI {
expr($1, false, false, false, false);
ftflg = false;
}
| T_SEMI {
ftflg = false;
}
;
/*
* The following two productions are used to implement
* ({ [[decl-list] stmt-list] }).
* XXX: This is not well tested.
*/
expr_statement_val:
expr T_SEMI {
/* XXX: We should really do that only on the last name */
if ($1->tn_op == NAME)
$1->tn_sym->s_used = true;
$$ = $1;
expr($1, false, false, false, false);
ftflg = false;
}
| non_expr_statement {
$$ = getnode();
$$->tn_type = gettyp(VOID);
}
;
expr_statement_list:
expr_statement_val
| expr_statement_list expr_statement_val {
$$ = $2;
}
;
selection_statement: /* C99 6.8.4 */
if_without_else {
SAVE_WARN_FLAGS(__FILE__, __LINE__);
if2();
if3(0);
}
| if_without_else T_ELSE {
SAVE_WARN_FLAGS(__FILE__, __LINE__);
if2();
} statement {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
if3(1);
}
| if_without_else T_ELSE error {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
if3(0);
}
| switch_expr statement {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
switch2();
}
| switch_expr error {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
switch2();
}
;
if_without_else:
if_expr statement
| if_expr error
;
if_expr:
T_IF T_LPAREN expr T_RPAREN {
if1($3);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
switch_expr:
T_SWITCH T_LPAREN expr T_RPAREN {
switch1($3);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
association:
type_name T_COLON expr
| T_DEFAULT T_COLON expr
;
association_list:
association
| association_list T_COMMA association
;
generic_expr:
T_GENERIC T_LPAREN expr T_COMMA association_list T_RPAREN {
$$ = $3;
}
;
do_statement:
do statement {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
iteration_statement: /* C99 6.8.5 */
while_expr statement {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
while2();
}
| while_expr error {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
while2();
}
| do_statement do_while_expr {
do2($2);
ftflg = false;
}
| do error {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
do2(NULL);
}
| for_exprs statement {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
for2();
popdecl();
blklev--;
}
| for_exprs error {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
for2();
popdecl();
blklev--;
}
;
while_expr:
T_WHILE T_LPAREN expr T_RPAREN {
while1($3);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
do:
T_DO {
do1();
}
;
do_while_expr:
T_WHILE T_LPAREN expr T_RPAREN T_SEMI {
$$ = $3;
}
;
for_start:
T_FOR T_LPAREN {
pushdecl(AUTO);
blklev++;
}
;
for_exprs:
for_start declspecs deftyp notype_init_decls T_SEMI opt_expr
T_SEMI opt_expr T_RPAREN {
/* variable declaration in for loop */
c99ism(325);
for1(NULL, $6, $8);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
| for_start opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPAREN {
for1($2, $4, $6);
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
opt_expr:
/* empty */ {
$$ = NULL;
}
| expr {
$$ = $1;
}
;
jump_statement: /* C99 6.8.6 */
goto identifier T_SEMI {
dogoto(getsym($2));
}
| goto error T_SEMI {
symtyp = FVFT;
}
| T_CONTINUE T_SEMI {
docont();
}
| T_BREAK T_SEMI {
dobreak();
}
| T_RETURN T_SEMI {
doreturn(NULL);
}
| T_RETURN expr T_SEMI {
doreturn($2);
}
;
goto:
T_GOTO {
symtyp = FLABEL;
}
;
asm_statement:
T_ASM T_LPAREN read_until_rparn T_SEMI {
setasm();
}
| T_ASM T_QUAL T_LPAREN read_until_rparn T_SEMI {
setasm();
}
| T_ASM error
;
read_until_rparn:
/* empty */ {
ignore_up_to_rparen();
}
;
declaration_list:
declaration {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
| declaration_list declaration {
CLEAR_WARN_FLAGS(__FILE__, __LINE__);
}
;
constant:
expr %prec T_COMMA {
$$ = $1;
}
;
expr:
expr T_ASTERISK expr {
$$ = build(MULT, $1, $3);
}
| expr T_MULTIPLICATIVE expr {
$$ = build($2, $1, $3);
}
| expr T_ADDITIVE expr {
$$ = build($2, $1, $3);
}
| expr T_SHIFT expr {
$$ = build($2, $1, $3);
}
| expr T_RELATIONAL expr {
$$ = build($2, $1, $3);
}
| expr T_EQUALITY expr {
$$ = build($2, $1, $3);
}
| expr T_AMPER expr {
$$ = build(BITAND, $1, $3);
}
| expr T_XOR expr {
$$ = build(BITXOR, $1, $3);
}
| expr T_BITOR expr {
$$ = build(BITOR, $1, $3);
}
| expr T_LOGAND expr {
$$ = build(LOGAND, $1, $3);
}
| expr T_LOGOR expr {
$$ = build(LOGOR, $1, $3);
}
| expr T_QUEST expr T_COLON expr {
$$ = build(QUEST, $1, build(COLON, $3, $5));
}
| expr T_ASSIGN expr {
$$ = build(ASSIGN, $1, $3);
}
| expr T_OPASSIGN expr {
$$ = build($2, $1, $3);
}
| expr T_COMMA expr {
$$ = build(COMMA, $1, $3);
}
| term {
$$ = $1;
}
| generic_expr {
$$ = $1;
}
;
term:
T_NAME {
/* XXX really necessary? */
if (yychar < 0)
yychar = yylex();
$$ = new_name_node(getsym($1), yychar);
}
| string {
$$ = new_string_node($1);
}
| T_CON {
$$ = new_constant_node(gettyp($1->v_tspec), $1);
}
| T_LPAREN expr T_RPAREN {
if ($2 != NULL)
$2->tn_parenthesized = true;
$$ = $2;
}
| T_LPAREN compound_statement_lbrace declaration_list
expr_statement_list {
blklev--;
mblklev--;
initsym = mktempsym(duptyp($4->tn_type));
mblklev++;
blklev++;
/* ({ }) is a GCC extension */
gnuism(320);
} compound_statement_rbrace T_RPAREN {
$$ = new_name_node(initsym, 0);
}
| T_LPAREN compound_statement_lbrace expr_statement_list {
blklev--;
mblklev--;
initsym = mktempsym($3->tn_type);
mblklev++;
blklev++;
/* ({ }) is a GCC extension */
gnuism(320);
} compound_statement_rbrace T_RPAREN {
$$ = new_name_node(initsym, 0);
}
| term T_INCDEC {
$$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL);
}
| T_INCDEC term {
$$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL);
}
| T_ASTERISK term {
$$ = build(INDIR, $2, NULL);
}
| T_AMPER term {
$$ = build(ADDR, $2, NULL);
}
| T_UNARY term {
$$ = build($1, $2, NULL);
}
| T_ADDITIVE term {
if (tflag && $1 == PLUS) {
/* unary + is illegal in traditional C */
warning(100);
}
$$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL);
}
| term T_LBRACK expr T_RBRACK {
$$ = build(INDIR, build(PLUS, $1, $3), NULL);
}
| term T_LPAREN T_RPAREN {
$$ = new_function_call_node($1, NULL);
}
| term T_LPAREN func_arg_list T_RPAREN {
$$ = new_function_call_node($1, $3);
}
| term point_or_arrow T_NAME {
if ($1 != NULL) {
sym_t *msym;
/*
* XXX struct_or_union_member should be integrated
* in build()
*/
if ($2 == ARROW) {
/*
* must do this before struct_or_union_member
* is called
*/
$1 = cconv($1);
}
msym = struct_or_union_member($1, $2, getsym($3));
$$ = build($2, $1, new_name_node(msym, 0));
} else {
$$ = NULL;
}
}
| T_REAL term {
$$ = build(REAL, $2, NULL);
}
| T_IMAG term {
$$ = build(IMAG, $2, NULL);
}
| T_EXTENSION term {
$$ = $2;
}
| T_REAL T_LPAREN term T_RPAREN {
$$ = build(REAL, $3, NULL);
}
| T_IMAG T_LPAREN term T_RPAREN {
$$ = build(IMAG, $3, NULL);
}
| T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN
%prec T_BUILTIN_OFFSETOF {
symtyp = FMEMBER;
$$ = build_offsetof($3, getsym($5));
}
| T_SIZEOF term %prec T_SIZEOF {
$$ = $2 == NULL ? NULL : build_sizeof($2->tn_type);
if ($$ != NULL)
check_expr_misc($2, 0, 0, 0, 0, 0, 1);
}
| T_SIZEOF T_LPAREN type_name T_RPAREN %prec T_SIZEOF {
$$ = build_sizeof($3);
}
| T_ALIGNOF T_LPAREN type_name T_RPAREN %prec T_ALIGNOF {
$$ = build_alignof($3);
}
| T_LPAREN type_name T_RPAREN term %prec T_UNARY {
$$ = cast($4, $2);
}
| T_LPAREN type_name T_RPAREN %prec T_UNARY {
sym_t *tmp = mktempsym($2);
idecl(tmp, 1, NULL);
} init_lbrace init_expr_list init_rbrace {
if (!Sflag)
/* compound literals are a C9X/GCC extension */
gnuism(319);
$$ = new_name_node(initsym, 0);
}
;
string:
T_STRING {
$$ = $1;
}
| T_STRING string2 {
$$ = cat_strings($1, $2);
}
;
string2:
T_STRING {
if (tflag) {
/* concatenated strings are illegal in traditional C */
warning(219);
}
$$ = $1;
}
| string2 T_STRING {
$$ = cat_strings($1, $2);
}
;
func_arg_list:
expr %prec T_COMMA {
$$ = new_function_argument_node(NULL, $1);
}
| func_arg_list T_COMMA expr {
$$ = new_function_argument_node($1, $3);
}
;
point_or_arrow:
T_MEMBACC {
symtyp = FMEMBER;
$$ = $1;
}
;
point:
T_MEMBACC {
if ($1 != POINT) {
/* syntax error '%s' */
error(249, yytext);
}
}
;
identifier:
T_NAME {
$$ = $1;
cgram_debug("name '%s'", $$->sb_name);
}
| T_TYPENAME {
$$ = $1;
cgram_debug("typename '%s'", $$->sb_name);
}
;
%%
/* ARGSUSED */
int
yyerror(const char *msg)
{
/* syntax error '%s' */
error(249, yytext);
if (++sytxerr >= 5)
norecover();
return 0;
}
static __inline int uq_gt(uint64_t, uint64_t);
static __inline int q_gt(int64_t, int64_t);
static __inline int
uq_gt(uint64_t a, uint64_t b)
{
return a > b;
}
static __inline int
q_gt(int64_t a, int64_t b)
{
return a > b;
}
#define q_lt(a, b) q_gt(b, a)
/*
* Gets a node for a constant and returns the value of this constant
* as integer.
*
* If the node is not constant or too large for int or of type float,
* a warning will be printed.
*
* toicon() should be used only inside declarations. If it is used in
* expressions, it frees the memory used for the expression.
*/
static int
toicon(tnode_t *tn, int required)
{
int i;
tspec_t t;
val_t *v;
v = constant(tn, required);
if (tn == NULL) {
i = 1;
goto done;
}
/*
* Abstract declarations are used inside expression. To free
* the memory would be a fatal error.
* We don't free blocks that are inside casts because these
* will be used later to match types.
*/
if (tn->tn_op != CON && dcs->d_ctx != ABSTRACT)
tfreeblk();
if ((t = v->v_tspec) == FLOAT || t == DOUBLE || t == LDOUBLE) {
i = (int)v->v_ldbl;
/* integral constant expression expected */
error(55);
} else {
i = (int)v->v_quad;
if (is_uinteger(t)) {
if (uq_gt((uint64_t)v->v_quad,
(uint64_t)TARG_INT_MAX)) {
/* integral constant too large */
warning(56);
}
} else {
if (q_gt(v->v_quad, (int64_t)TARG_INT_MAX) ||
q_lt(v->v_quad, (int64_t)TARG_INT_MIN)) {
/* integral constant too large */
warning(56);
}
}
}
done:
free(v);
return i;
}
static void
idecl(sym_t *decl, int initflg, sbuf_t *renaming)
{
char *s;
initerr = false;
initsym = decl;
switch (dcs->d_ctx) {
case EXTERN:
if (renaming != NULL) {
lint_assert(decl->s_rename == NULL);
s = getlblk(1, renaming->sb_len + 1);
(void)memcpy(s, renaming->sb_name, renaming->sb_len + 1);
decl->s_rename = s;
freeyyv(&renaming, T_NAME);
}
decl1ext(decl, initflg);
break;
case ARG:
if (renaming != NULL) {
/* symbol renaming can't be used on function arguments */
error(310);
freeyyv(&renaming, T_NAME);
break;
}
(void)declare_argument(decl, initflg);
break;
case AUTO:
if (renaming != NULL) {
/* symbol renaming can't be used on automatic variables */
error(311);
freeyyv(&renaming, T_NAME);
break;
}
declare_local(decl, initflg);
break;
default:
LERROR("idecl(%d)", dcs->d_ctx);
}
if (initflg && !initerr)
initstack_init();
}
/*
* Discard all input tokens up to and including the next
* unmatched right paren
*/
static void
ignore_up_to_rparen(void)
{
int level;
if (yychar < 0)
yychar = yylex();
freeyyv(&yylval, yychar);
level = 1;
while (yychar != T_RPAREN || --level > 0) {
if (yychar == T_LPAREN) {
level++;
} else if (yychar <= 0) {
break;
}
freeyyv(&yylval, yychar = yylex());
}
yyclearin;
}
static sym_t *
symbolrename(sym_t *s, sbuf_t *sb)
{
if (sb)
s->s_rename = sb->sb_name;
return s;
}
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