# Bison Regressions. -*- Autotest -*-
-# Copyright (C) 2001-2010 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
AT_SETUP([Trivial grammars])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%{
-void yyerror (char const *);
-int yylex (void);
+]AT_YYERROR_DECLARE_EXTERN[
+]AT_YYLEX_DECLARE_EXTERN[
#define YYSTYPE int *
%}
program: 'x';
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-o input.c input.y])
-AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([input.o])
AT_COMPILE([input.o], [-DYYDEBUG -c input.c])
AT_CLEANUP
AT_SETUP([YYSTYPE typedef])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%{
-void yyerror (char const *);
-int yylex (void);
+]AT_YYERROR_DECLARE_EXTERN[
+]AT_YYLEX_DECLARE_EXTERN[
typedef union { char const *val; } YYSTYPE;
%}
program: { $$ = ""; };
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-o input.c input.y])
-AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([input.o])
AT_CLEANUP
# Found in GCJ: they expect the tokens to be defined before the user
# prologue, so that they can use the token definitions in it.
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%{
-void yyerror (const char *s);
-int yylex (void);
+]AT_YYERROR_DECLARE_EXTERN[
+]AT_YYLEX_DECLARE_EXTERN[
%}
%union
exp: MY_TOKEN;
%%
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-y -o input.c input.y])
-AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([input.o])
AT_CLEANUP
# Found in GCJ: they expect the tokens to be defined before the user
# prologue, so that they can use the token definitions in it.
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%{
-#include <stdio.h>
-void yyerror (const char *s);
-int yylex (void);
+]AT_YYERROR_DECLARE_EXTERN[
+]AT_YYLEX_DECLARE_EXTERN[
void print_my_token (void);
%}
int val;
};
%{
+#include <stdio.h>
void
print_my_token (void)
{
exp: MY_TOKEN;
%%
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-o input.c input.y])
-AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([input.o])
AT_CLEANUP
AT_SETUP([Braces parsing])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA([input.y],
-[[/* Bison used to swallow the character after `}'. */
+[[/* Bison used to swallow the character after '}'. */
%%
exp: { tests = {{{{{{{{{{}}}}}}}}}}; };
%%
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-v -o input.c input.y])
AT_SETUP([Duplicate string])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA([input.y],
-[[/* `Bison -v' used to dump core when two tokens are defined with the same
+[[/* 'Bison -v' used to dump core when two tokens are defined with the same
string, as LE and GE below. */
%token NUM
exp: '(' exp ')' | NUM ;
%%
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-v -o input.c input.y], 0, [],
-[[input.y:6.8-14: warning: symbol `"<="' used more than once as a literal string
+[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string [-Wother]
]])
AT_CLEANUP
AT_KEYWORDS([report])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA([input.y],
[[%%
expr:
};
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-o input.c -v input.y])
on left: 3, on right: 4
-state 0
+State 0
0 $accept: . expr $end
$@2 go to state 3
-state 1
+State 1
2 expr: 'a' . $@1 'b'
$@1 go to state 4
-state 2
+State 2
0 $accept: expr . $end
$end shift, and go to state 5
-state 3
+State 3
4 expr: $@2 . 'c'
'c' shift, and go to state 6
-state 4
+State 4
2 expr: 'a' $@1 . 'b'
'b' shift, and go to state 7
-state 5
+State 5
0 $accept: expr $end .
$default accept
-state 6
+State 6
4 expr: $@2 'c' .
$default reduce using rule 4 (expr)
-state 7
+State 7
2 expr: 'a' $@1 'b' .
]])
AT_BISON_CHECK([input.y], [1], [],
-[[input.y:2.1: invalid character: `?'
-input.y:3.14: invalid character: `}'
-input.y:4.1: invalid character: `%'
-input.y:4.2: invalid character: `&'
-input.y:5.1-17: invalid directive: `%a-does-not-exist'
-input.y:6.1-2: invalid directive: `%-'
-input.y:7.1-8.0: missing `%}' at end of file
-input.y:7.1-8.0: syntax error, unexpected %{...%}
+[[input.y:2.1: error: invalid character: '?'
+input.y:3.14: error: invalid character: '}'
+input.y:4.1: error: invalid character: '%'
+input.y:4.2: error: invalid character: '&'
+input.y:5.1-17: error: invalid directive: '%a-does-not-exist'
+input.y:6.1: error: invalid character: '%'
+input.y:6.2: error: invalid character: '-'
+input.y:7.1-8.0: error: missing '%}' at end of file
+input.y:7.1-8.0: error: syntax error, unexpected %{...%}
]])
AT_CLEANUP
]])
AT_BISON_CHECK([input.y], [1], [],
-[[input.y:3.1-15: syntax error, unexpected %initial-action, expecting {...}
+[[input.y:3.1-15: error: syntax error, unexpected %initial-action, expecting {...}
]])
AT_CLEANUP
AT_SETUP([Token definitions])
-# Bison managed, when fed with `%token 'f' "f"' to #define 'f'!
+AT_BISON_OPTION_PUSHDEFS
+# Bison managed, when fed with '%token 'f' "f"' to #define 'f'!
AT_DATA_GRAMMAR([input.y],
[%{
-#include <stdlib.h>
-#include <stdio.h>
-void yyerror (const char *s);
-int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
%}
[%error-verbose
%token MYEOF 0 "end of file"
%%
exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!";
%%
-void
-yyerror (char const *s)
-{
- fprintf (stderr, "%s\n", s);
-}
-
-int
-yylex (void)
-{
- static int called;
- if (called++)
- abort ();
- return SPECIAL;
-}
-
-int
-main (void)
-{
- return yyparse ();
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([{ SPECIAL }])[
+]AT_MAIN_DEFINE[
]])
+AT_BISON_OPTION_POPDEFS
# Checking the warning message guarantees that the trigraph "??!" isn't
# unnecessarily escaped here even though it would need to be if encoded in a
# C-string literal. Also notice that unnecessary escaping, such as "\?", from
# the user specification is eliminated.
AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],
-[[input.y:22.8-14: warning: symbol SPECIAL redeclared
-input.y:22.8-63: warning: symbol `"\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!"' used more than once as a literal string
+[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
+input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
+]])
+AT_BISON_CHECK([-fcaret -o input.c input.y], [[0]], [[]],
+[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
+ %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
+ ^^^^^^^
+input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
+ %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
+ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
]])
AT_COMPILE([input])
AT_SETUP([Characters Escapes])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[%{
-void yyerror (const char *s);
-int yylex (void);
+]AT_YYERROR_DECLARE_EXTERN[
+]AT_YYLEX_DECLARE_EXTERN[
%}
[%%
exp:
'\'' "\'"
| '\"' "\""
-| '"' "'"
+| '"' "'" /* Pacify font-lock-mode: ". */
;
]])
-# Pacify font-lock-mode: "
+
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([-o input.c input.y])
-AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([input.o])
AT_CLEANUP
# The generation of the reduction was once wrong in Bison, and made it
# miss some reductions. In the following test case, the reduction on
-# `undef_id_tok' in state 1 was missing. This is stripped down from
+# 'undef_id_tok' in state 1 was missing. This is stripped down from
# the actual web2c.y.
AT_SETUP([Web2c Report])
AT_KEYWORDS([report])
AT_DATA([input.y],
-[[%token undef_id_tok const_id_tok
+[[%token undef_id_tok const_id_tok
%start CONST_DEC_PART
\f
;
CONST_DEC_LIST:
- CONST_DEC
+ CONST_DEC
| CONST_DEC_LIST CONST_DEC
;
CONST_DEC:
- { } undef_id_tok '=' const_id_tok ';'
+ { } undef_id_tok '=' const_id_tok ';'
;
%%
]])
on left: 4, on right: 5
-state 0
+State 0
0 $accept: . CONST_DEC_PART $end
$@1 go to state 4
-state 1
+State 1
0 $accept: CONST_DEC_PART . $end
$end shift, and go to state 5
-state 2
+State 2
1 CONST_DEC_PART: CONST_DEC_LIST .
3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC
$@1 go to state 4
-state 3
+State 3
2 CONST_DEC_LIST: CONST_DEC .
$default reduce using rule 2 (CONST_DEC_LIST)
-state 4
+State 4
5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';'
undef_id_tok shift, and go to state 7
-state 5
+State 5
0 $accept: CONST_DEC_PART $end .
$default accept
-state 6
+State 6
3 CONST_DEC_LIST: CONST_DEC_LIST CONST_DEC .
$default reduce using rule 3 (CONST_DEC_LIST)
-state 7
+State 7
5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';'
'=' shift, and go to state 8
-state 8
+State 8
5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';'
const_id_tok shift, and go to state 9
-state 9
+State 9
5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';'
';' shift, and go to state 10
-state 10
+State 10
5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' .
## Web2c Actions. ##
## --------------- ##
-# The generation of the mapping `state -> action' was once wrong in
+# The generation of the mapping 'state -> action' was once wrong in
# extremely specific situations. web2c.y exhibits this situation.
# Below is a stripped version of the grammar. It looks like one can
# simplify it further, but just don't: it is tuned to exhibit a bug,
static const char *const yytname[] =
{
"$end", "error", "$undefined", "\"if\"", "\"const\"", "\"then\"",
- "\"else\"", "$accept", "statement", "struct_stat", "if", "else", 0
+ "\"else\"", "$accept", "statement", "struct_stat", "if", "else", YY_NULL
};
static const yytype_uint16 yytoknum[] =
{
# so that possible bound checking compilers could check all the skeletons.
m4_define([_AT_DATA_DANCER_Y],
[AT_DATA_GRAMMAR([dancer.y],
-[%{
-static int yylex (AT_LALR1_CC_IF([int *], [void]));
-AT_LALR1_CC_IF([],
-[#include <stdlib.h>
-#include <stdio.h>
-static void yyerror (const char *);])
-%}
+[[%code provides
+{
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+}
$1
%token ARROW INVALID NUMBER STRING DATA
-%defines
%verbose
%error-verbose
/* Grammar follows */
| INVALID
;
%%
-AT_LALR1_CC_IF(
-[/* A C++ error reporting function. */
-void
-yy::parser::error (const std::string& m)
-{
- std::cerr << m << std::endl;
-}
-
-int
-yyparse ()
-{
- yy::parser parser;
-#if YYDEBUG
- parser.set_debug_level (YYDEBUG);
-#endif
- return parser.parse ();
-}
-],
-[static void
-yyerror (const char *s)
-{
- fprintf (stderr, "%s\n", s);
-}])
-
-static int
-yylex (AT_LALR1_CC_IF([int *lval], [void]))
-[{
- static int const tokens[] =
- {
- ':', -1
- };
- static size_t toknum;
- ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC. */])[
- if (! (toknum < sizeof tokens / sizeof *tokens))
- abort ();
- return tokens[toknum++];
-}]
-
-int
-main (void)
-{
- return yyparse ();
-}
-])
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([":"])[
+]AT_MAIN_DEFINE[
+]])
])# _AT_DATA_DANCER_Y
[AT_SETUP([Dancer $1])
AT_BISON_OPTION_PUSHDEFS([$1])
_AT_DATA_DANCER_Y([$1])
-AT_BISON_CHECK([-o dancer.c dancer.y])
AT_FULL_COMPILE([dancer])
AT_PARSER_CHECK([./dancer], 1, [],
[syntax error, unexpected ':'
[AT_DATA_GRAMMAR([expect2.y],
[%{
static int yylex (AT_LALR1_CC_IF([int *], [void]));
-AT_LALR1_CC_IF([],
-[#include <stdio.h>
-#include <stdlib.h>
-static void yyerror (const char *);])
+AT_LALR1_CC_IF([[#include <cstdlib>]],
+[[
+]AT_YYERROR_DECLARE])[
%}
$1
-%defines
%error-verbose
%token A 1000
%token B
t: A | B;
%%
-AT_LALR1_CC_IF(
-[/* A C++ error reporting function. */
-void
-yy::parser::error (const std::string& m)
-{
- std::cerr << m << std::endl;
-}
-
-int
+]AT_YYERROR_DEFINE[
+]AT_LALR1_CC_IF(
+[int
yyparse ()
{
yy::parser parser;
return parser.parse ();
}
-],
-[static void
-yyerror (const char *s)
-{
- fprintf (stderr, "%s\n", s);
-}])
+])[
+#include <assert.h>
static int
-yylex (AT_LALR1_CC_IF([int *lval], [void]))
-[{
+yylex (]AT_LALR1_CC_IF([int *lval], [void])[)
+{
static int const tokens[] =
{
1000, '+', '+', -1
};
static size_t toknum;
]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC. */])[
- if (! (toknum < sizeof tokens / sizeof *tokens))
- abort ();
+ assert (toknum < sizeof tokens / sizeof *tokens);
return tokens[toknum++];
-}]
-
-int
-main (void)
-{
- return yyparse ();
}
-])
+]AT_MAIN_DEFINE[
+]])
])# _AT_DATA_EXPECT2_Y
# AT_CHECK_EXPECT2(BISON-OPTIONS)
-# ------------------------------
+# -------------------------------
# Generate the grammar, compile it, run it.
m4_define([AT_CHECK_EXPECT2],
[AT_SETUP([Expecting two tokens $1])
AT_BISON_OPTION_PUSHDEFS([$1])
_AT_DATA_EXPECT2_Y([$1])
-AT_BISON_CHECK([-o expect2.c expect2.y])
AT_FULL_COMPILE([expect2])
AT_PARSER_CHECK([./expect2], 1, [],
[syntax error, unexpected '+', expecting A or B
# Bison once mistook braced code in a declaration in the rules section to be a
# rule action.
-
+AT_BISON_OPTION_PUSHDEFS([%debug])
AT_DATA_GRAMMAR([input.y],
[[%{
-#include <stdio.h>
-static void yyerror (char const *msg);
-static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
%}
-
+%debug
%error-verbose
-
%%
start:
{
printf ("Bison would once convert this action to a midrule because of the"
- " subsequent braced code.\n");
+ " subsequent braced code.\n");
}
;
%printer { fprintf (yyoutput, "PRINTER"); } 'a';
%%
-
-static void
-yyerror (char const *msg)
-{
- fprintf (stderr, "%s\n", msg);
-}
-
-static int
-yylex (void)
-{
- return 'a';
-}
-
-int
-main (void)
-{
- yydebug = 1;
- return !yyparse ();
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE(["a"])[
+]AT_MAIN_DEFINE[
]])
+AT_BISON_OPTION_POPDEFS
-AT_BISON_CHECK([-t -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
AT_COMPILE([input])
-AT_PARSER_CHECK([./input], 0,
+AT_PARSER_CHECK([./input --debug], 1,
[[Bison would once convert this action to a midrule because of the subsequent braced code.
]],
[[Starting parse
%token 'a' "A";
]])
-AT_BISON_CHECK([-t -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
AT_CLEANUP
# state's one item that (1) is associated with the same rule as the reduction
# and (2) has its dot at the end of its RHS. Previously, Bison also
# erroneously printed the lookahead set next to all of the state's other items
-# associated with the same rule. This bug affected only the `.output' file and
+# associated with the same rule. This bug affected only the '.output' file and
# not the generated parser source code.
AT_DATA([[input.y]],
]])
AT_BISON_CHECK([[--report=all input.y]])
-AT_CHECK([[sed -n '/^state 1$/,/^state 2$/p' input.output]], [[0]],
-[[state 1
+AT_CHECK([[sed -n '/^State 1$/,/^State 2$/p' input.output]], [[0]],
+[[State 1
2 start: 'a' . a 'a'
3 a: . 'a'
a go to state 5
-state 2
+State 2
]])
AT_CLEANUP
# POSIX says token numbers can be declared in %left, %right, and %nonassoc, but
# we lost this in Bison 1.50.
-
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
-[[%{
- #include <stdio.h>
- void yyerror (char const *);
- int yylex (void);
-%}
+[[%code {
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+}
%error-verbose
+%right END 0
%left TK1 1 TK2 2 "tok alias" 3
%%
-start: TK1 sr_conflict "tok alias" ;
-
+start:
+ TK1 sr_conflict "tok alias"
+ | start %prec END
+ ;
sr_conflict:
TK2
| TK2 "tok alias"
%%
-void
-yyerror (char const *msg)
-{
- fprintf (stderr, "%s\n", msg);
-}
-
-int
-yylex (void)
-{
- static int const input[] = { 1, 2, 3, 0 };
- static int const *inputp = input;
- return *inputp++;
-}
-
-int
-main (void)
-{
- return yyparse ();
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[
+]AT_MAIN_DEFINE[
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([[-o input.c input.y]], [[0]],,
-[[input.y:24.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias"
+[[input.y:24.5-19: warning: rule useless in parser due to conflicts: start: start [-Wother]
+input.y:28.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias" [-Wother]
]])
AT_COMPILE([[input]])
AT_PARSER_CHECK([[./input]])
[cp $abs_top_srcdir/src/parse-gram.y input.y]
AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]])
[mv input.c lalr.c]
+AT_CAPTURE_FILE([lalr.c])
AT_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]])
[mv input.c ielr.c]
-AT_CHECK([[diff -u lalr.c ielr.c]])
+AT_CAPTURE_FILE([ielr.c])
+AT_CHECK([[diff lalr.c ielr.c]], [[0]])
AT_CLEANUP
AT_SETUP([[parse.error=verbose and YYSTACK_USE_ALLOCA]])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%code {
- #include <stdio.h>
- void yyerror (char const *);
- int yylex (void);
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
#define YYSTACK_USE_ALLOCA 1
}
%%
-void
-yyerror (char const *msg)
-{
- fprintf (stderr, "%s\n", msg);
-}
-
-int
-yylex (void)
-{
+]AT_YYERROR_DEFINE[
/* Induce two syntax error messages (which requires full error
recovery by shifting 3 tokens) in order to detect any loss of the
reallocated buffer. */
- static char const *input = "abc";
- return *input++;
-}
-
-int
-main (void)
-{
- return yyparse ();
-}
+]AT_YYLEX_DEFINE(["abc"])[
+]AT_MAIN_DEFINE[
]])
+AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([[-o input.c input.y]])
AT_COMPILE([[input]])
AT_SETUP([[parse.error=verbose overflow]])
+AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
[[%code {
- #include <stdio.h>
- void yyerror (char const *);
- int yylex (void);
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
/* This prevents this test case from having to induce error messages
large enough to overflow size_t. */
#define YYSIZE_T unsigned char
- /* Bring in malloc so yacc.c doesn't try to provide a malloc prototype
- using our YYSIZE_T. */
+ /* Bring in malloc and set EXIT_SUCCESS so yacc.c doesn't try to
+ provide a malloc prototype using our YYSIZE_T. */
#include <stdlib.h>
+ #ifndef EXIT_SUCCESS
+ # define EXIT_SUCCESS 0
+ #endif
/* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and
we don't want gcc to warn everywhere this constant would be too big
%%
-void
-yyerror (char const *msg)
-{
- fprintf (stderr, "%s\n", msg);
-}
-
-int
-yylex (void)
-{
+]AT_YYERROR_DEFINE[
/* Induce two syntax error messages (which requires full error
recovery by shifting 3 tokens). */
- static char const *input = "abc";
- return *input++;
-}
-
+]AT_YYLEX_DEFINE(["abc"])[
int
main (void)
{
syntax error
memory exhausted
]])
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP
+
+
+
+## ------------------------ ##
+## LAC: Exploratory stack. ##
+## ------------------------ ##
+
+AT_SETUP([[LAC: Exploratory stack]])
+
+m4_pushdef([AT_LAC_CHECK], [
+
+AT_BISON_OPTION_PUSHDEFS([%debug $1])
+
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+ ]AT_YYERROR_DECLARE[
+ int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[);
+}
+%debug
+]$1[
+%define parse.error verbose
+%token 'c'
+
+%%
+
+// default reductions in inconsistent states
+// v v v v v v v v v v v v v v
+S: A B A A B A A A A B A A A A A A A B C C A A A A A A A A A A A A B ;
+// ^ ^ ^
+// LAC reallocs
+
+A: 'a' | /*empty*/ { printf ("inconsistent default reduction\n"); } ;
+B: 'b' ;
+C: /*empty*/ { printf ("consistent default reduction\n"); } ;
+
+%%
+]AT_YYERROR_DEFINE[
+int
+yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[)
+{
+ static char const *input = "bbbbc";]AT_PURE_IF([[
+ *v = 0;]])[
+ return *input++;
+}
+
+]AT_MAIN_DEFINE[
+]])
+
+AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
+ -Dparse.lac.memory-trace=full \
+ -o input.c input.y]], [[0]], [],
+[[input.y: warning: 21 shift/reduce conflicts [-Wconflicts-sr]
+]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input --debug > stdout.txt 2> stderr.txt]], [[1]])
+
+# Make sure syntax error doesn't forget that 'a' is expected. It would
+# be forgotten without lookahead correction.
+AT_CHECK([[grep 'syntax error,' stderr.txt]], [[0]],
+[[syntax error, unexpected 'c', expecting 'a' or 'b'
+]])
+
+# Check number of default reductions in inconsistent states to be sure
+# syntax error is detected before unnecessary reductions are performed.
+AT_CHECK([[$PERL -0777 -ne 'print s/inconsistent default reduction//g;' \
+ < stdout.txt || exit 77]], [[0]], [[14]])
+
+# Check number of default reductions in consistent states to be sure
+# it is performed before the syntax error is detected.
+AT_CHECK([[$PERL -0777 -ne 'print s/\bconsistent default reduction//g;' \
+ < stdout.txt || exit 77]], [[0]], [[2]])
+
+# Check number of reallocs to be sure reallocated memory isn't somehow
+# lost between LAC invocations.
+AT_CHECK([[$PERL -0777 -ne 'print s/\(realloc//g;' < stderr.txt \
+ || exit 77]], [[0]], [[3]])
+
+AT_BISON_OPTION_POPDEFS
+])
+
+AT_LAC_CHECK([[%define api.push-pull pull]])
+AT_LAC_CHECK([[%define api.push-pull pull %define api.pure]])
+AT_LAC_CHECK([[%define api.push-pull both]])
+AT_LAC_CHECK([[%define api.push-pull both %define api.pure]])
+
+m4_popdef([AT_LAC_CHECK])
+
+AT_CLEANUP
+
+
+
+## ------------------------ ##
+## LAC: Memory exhaustion. ##
+## ------------------------ ##
+
+AT_SETUP([[LAC: Memory exhaustion]])
+
+m4_pushdef([AT_LAC_CHECK],
+[AT_BISON_OPTION_PUSHDEFS([%debug])
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+ #define YYMAXDEPTH 8
+}
+%debug
+%error-verbose
+
+%%
+
+S: A A A A A A A A A ;
+A: /*empty*/ | 'a' ;
+
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE(["$1"])[
+]AT_MAIN_DEFINE[
+]])
+
+AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
+ -o input.c input.y]], [[0]], [],
+[[input.y: warning: 8 shift/reduce conflicts [-Wconflicts-sr]
+]])
+AT_COMPILE([[input]])
+AT_BISON_OPTION_POPDEFS
+])
+
+# Check for memory exhaustion during parsing.
+AT_LAC_CHECK([])
+AT_PARSER_CHECK([[./input --debug]], [[2]], [],
+[[Starting parse
+Entering state 0
+Reading a token: Now at end of input.
+LAC: initial context established for $end
+LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
+memory exhausted
+Cleanup: discarding lookahead token $end ()
+Stack now 0
+]])
+
+# Induce an immediate syntax error with an undefined token, and check
+# for memory exhaustion while building syntax error message.
+AT_LAC_CHECK([z], [[0]])
+AT_PARSER_CHECK([[./input --debug]], [[2]], [],
+[[Starting parse
+Entering state 0
+Reading a token: Next token is token $undefined ()
+LAC: initial context established for $undefined
+LAC: checking lookahead $undefined: Always Err
+Constructing syntax error message
+LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
+syntax error
+memory exhausted
+Cleanup: discarding lookahead token $undefined ()
+Stack now 0
+]])
+
+m4_popdef([AT_LAC_CHECK])
+
+AT_CLEANUP
+
+
+## ---------------------- ##
+## Lex and parse params. ##
+## ---------------------- ##
+
+# AT_TEST(SKELETON)
+# -----------------
+# Check that the identifier of the params is properly fetched
+# even when there are trailing blanks.
+
+m4_pushdef([AT_TEST],
+[AT_SETUP([[Lex and parse params: $1]])
+
+## FIXME: Improve parsing of parse-param.
+AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" %parse-param { int x } %parse-param { int y }])
+
+AT_DATA_GRAMMAR([input.y],
+[[%locations
+%skeleton "$1"
+%union { int ival; }
+%parse-param { int x }
+// Spaces, tabs, and new lines.
+%parse-param { @&t@
+ int y @&t@
+ @&t@
+ @&t@
+}
+
+%{
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+%}
+
+%%
+exp: 'a' { fprintf (stdout, "x: %d, y: %d\n", x, y); };
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE(["a"])[
+
+]AT_SKEL_CC_IF(
+[int
+yyparse (int x, int y)
+{
+ yy::parser parser(x, y);
+ return parser.parse ();
+}
+])[
+
+int
+main (void)
+{
+ return !!yyparse(1, 2);
+}
+]])
+
+AT_FULL_COMPILE([input])
+AT_PARSER_CHECK([./input], 0, [[x: 1, y: 2
+]])
+AT_BISON_OPTION_POPDEFS
+
+AT_CLEANUP
+])
+
+## FIXME: test Java, and iterate over skeletons.
+AT_TEST([yacc.c])
+AT_TEST([glr.c])
+AT_TEST([lalr1.cc])
+AT_TEST([glr.cc])
+
+m4_popdef([AT_TEST])
+
+
+## ----------------------- ##
+## stdio.h is not needed. ##
+## ----------------------- ##
+
+# At some point, by accident, yy_location_print_ was using fprintf and
+# FILE which are from stdio.h, which we do not require.
+AT_SETUP([[stdio.h is not needed]])
+
+AT_BISON_OPTION_PUSHDEFS
+
+AT_DATA_GRAMMAR([input.y],
+[[%locations
+%code
+{
+ static int yylex (void) { return 0; }
+ static void yyerror (const char* msg) { (void) msg; }
+}
+%%
+exp: {}
+%%
+]AT_MAIN_DEFINE[
+]])
+
+AT_FULL_COMPILE([input])
+
+AT_BISON_OPTION_POPDEFS
AT_CLEANUP
projects / bison.git / blobdiff