[bison.git] / tests / glr-regression.at

# Checking GLR Parsing: Regression Tests           -*- Autotest -*-
# Copyright (C) 2002, 2003, 2005 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
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

AT_BANNER([[GLR Regression Tests]])

## --------------------------- ##
## Badly Collapsed GLR States. ##
## --------------------------- ##

AT_SETUP([Badly Collapsed GLR States])

AT_DATA_GRAMMAR([glr-regr1.y],
[[/* Regression Test: Improper state compression */
/* Reported by Scott McPeak */

%{
#include <stdio.h>

#define YYSTYPE int
static YYSTYPE exprMerge (YYSTYPE x0, YYSTYPE x1);
int yylex (void);
void yyerror (char const *msg);
%}


%glr-parser


/* -------- productions ------ */
%%

StartSymbol: E  { $$=0; }                   %merge <exprMerge>
           ;

E: E 'P' E { $$=1; printf("E -> E 'P' E\n"); }  %merge <exprMerge>
 | 'B'     { $$=2; printf("E -> 'B'\n"); }      %merge <exprMerge>
 ;


/* ---------- C code ----------- */
%%

static YYSTYPE exprMerge (YYSTYPE x0, YYSTYPE x1)
{
  (void) x0;
  (void) x1;
  printf ("<OR>\n");
  return 0;
}

int
main (void)
{
  return yyparse ();
}

void
yyerror (char const *msg)
{
  fprintf (stderr, "%s\n", msg);
}


int
yylex (void)
{
  for (;;)
    {
      int ch = getchar ();
      if (ch == EOF)
	return 0;
      else if (ch == 'B' || ch == 'P')
	return ch;
    }
}
]])

AT_CHECK([[bison -o glr-regr1.c glr-regr1.y]], 0, [],
[glr-regr1.y: conflicts: 1 shift/reduce
])
AT_COMPILE([glr-regr1])
AT_CHECK([[echo BPBPB | ./glr-regr1]], 0,
[[E -> 'B'
E -> 'B'
E -> E 'P' E
E -> 'B'
E -> E 'P' E
E -> 'B'
E -> E 'P' E
E -> E 'P' E
<OR>
]], [])

AT_CLEANUP

## ------------------------------------------------------------ ##
## Improper handling of embedded actions and $-N in GLR parsers ##
## ------------------------------------------------------------ ##

AT_SETUP([Improper handling of embedded actions and dollar(-N) in GLR parsers])

AT_DATA_GRAMMAR([glr-regr2a.y],
[[/* Regression Test: Improper handling of embedded actions and $-N  */
/* Reported by S. Eken */

%{
  #define YYSTYPE char const *
  #define yyfalse 0
  #define yytrue 1

  #include <ctype.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  int yylex (void);
  void yyerror (char const *);
%}

%glr-parser

%%

command:
    's' var 't'
       { printf ("Variable: '%s'\n", $2); }
    'v' 'x' 'q'
  | 's' var_list 't' 'e'
       { printf ("Varlist: '%s'\n", $2); }
  | 's' var 't' var_printer 'x'
  ;

var:
  'V'
     { $$ = $1; }
  ;

var_list:
  var
    { $$ = $1; }
  | var ',' var_list
    {
      char *s = (char *) malloc (strlen ($1) + 1 + strlen ($3) + 1);
      strcpy (s, $1);
      strcat (s, ",");
      strcat (s, $3);
      $$ = s;
    }
  ;

var_printer: 'v'
   { printf ("Variable: '%s'\n", $-1); }

%%

FILE *yyin = NULL;

int
yylex (void)
{
  char buf[50];
  char *s;
  switch (fscanf (yyin, " %1[a-z,]", buf)) {
  case 1:
    return buf[0];
  case EOF:
    return 0;
  default:
    break;
  }
  if (fscanf (yyin, "%49s", buf) != 1)
    return 0;
  if (sizeof buf - 1 <= strlen (buf))
    abort ();
  s = (char *) malloc (strlen (buf) + 1);
  strcpy (s, buf);
  yylval = s;
  return 'V';
}

void
yyerror (char const *s)
{ printf ("%s\n", s);
}

int
main (int argc, char **argv)
{
  yyin = stdin;
  if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
  return yyparse ();
}
]])

AT_CHECK([[bison -o glr-regr2a.c glr-regr2a.y]], 0, [],
[glr-regr2a.y: conflicts: 2 shift/reduce
])
AT_COMPILE([glr-regr2a])

AT_CHECK([[echo s VARIABLE_1 t v x q | ./glr-regr2a]], 0,
[[Variable: 'VARIABLE_1'
]], [])
AT_CHECK([[echo s VARIABLE_1 , ANOTHER_VARIABLE_2 t e | ./glr-regr2a]], 0,
[[Varlist: 'VARIABLE_1,ANOTHER_VARIABLE_2'
]])
AT_CHECK([[echo s VARIABLE_3 t v x | ./glr-regr2a]], 0,
[[Variable: 'VARIABLE_3'
]], [])


AT_CLEANUP

## ------------------------------------------------------------ ##
## Improper merging of GLR delayed action sets                  ##
## ------------------------------------------------------------ ##

AT_SETUP([Improper merging of GLR delayed action sets])

AT_DATA_GRAMMAR([glr-regr3.y],
[[/* Regression Test: Improper merging of GLR delayed action sets.  */
/* Reported by M. Rosien */

%{
#include <stdio.h>
#include <stdarg.h>

static int MergeRule (int x0, int x1);
static void yyerror(char const * s);
int yylex (void);

#define RULE(x) (1 << (x))

%}

%glr-parser

%token BAD_CHAR
%token P1 P2 T1 T2 T3 T4 O1 O2

%%

S : P1 T4 O2 NT6 P2  { printf ("Result: %x\n", $4); }
;

NT1 : P1 T1 O1 T2 P2 { $$ = RULE(2); }  %merge<MergeRule>
;

NT2 : NT1             { $$ = RULE(3); } %merge<MergeRule>
    | P1 NT1 O1 T3 P2 { $$ = RULE(4); } %merge<MergeRule>
;

NT3 : T3              { $$ = RULE(5); } %merge<MergeRule>
    | P1 NT1 O1 T3 P2 { $$ = RULE(6); } %merge<MergeRule>
;

NT4 : NT3              { $$ = RULE(7); } %merge<MergeRule>
    | NT2              { $$ = RULE(8); } %merge<MergeRule>
    | P1 NT2 O1 NT3 P2 { $$ = RULE(9); } %merge<MergeRule>
;

NT5 : NT4              { $$ = RULE(10); } %merge<MergeRule>
;

NT6 : P1 NT1 O1 T3 P2  { $$ = RULE(11) | $2; } %merge<MergeRule>
    | NT5              { $$ = RULE(12) | $1; } %merge<MergeRule>
;

%%

static int MergeRule (int x0, int x1) {
  return x0 | x1;
}

static void yyerror(char const * s) {
  fprintf(stderr,"error: %s\n",s);
}

FILE *yyin = NULL;

int P[] = { P1, P2 };
int O[] = { O1, O2 };
int T[] = { T1, T2, T3, T4 };

int yylex (void)
{
  char inp[3];
  if (fscanf (yyin, "%2s", inp) == EOF)
    return 0;
  switch (inp[0])
    {
    case 'p': return P[inp[1] - '1'];
    case 't': return T[inp[1] - '1'];
    case 'o': return O[inp[1] - '1'];
    }
  return BAD_CHAR;
}

int main(int argc, char* argv[]) {
  yyin = stdin;
  if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
  return yyparse ();
}
]])

AT_CHECK([[bison -o glr-regr3.c glr-regr3.y]], 0, [],
[glr-regr3.y: conflicts: 1 shift/reduce, 1 reduce/reduce
])
AT_COMPILE([glr-regr3])

AT_CHECK([[echo p1 t4 o2 p1 p1 t1 o1 t2 p2 o1 t3 p2 p2 | ./glr-regr3]], 0,
[[Result: 1c04
]], [])

AT_CLEANUP


## ---------------------------------------------------------------------- ##
## Duplicate representation of merged trees                               ##
## Thanks to Joel E. Denny for this test; see                             ##
## <http://lists.gnu.org/archive/html/help-bison/2005-07/msg00013.html>.  ##
## ---------------------------------------------------------------------- ##

AT_SETUP([Duplicate representation of merged trees])

AT_DATA_GRAMMAR([glr-regr4.y],
[[%union { char *ptr; }
%type <ptr> S A A1 A2 B
%glr-parser

%{
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  static char *merge (YYSTYPE, YYSTYPE);
  static char *make_value (char *, char *);
  static void yyerror (char const *);
  static int yylex (void);
%}

%%

tree: S { printf ("%s\n", $1); } ;

S:
  A   %merge<merge> { $$ = make_value ("S", $1); }
  | B %merge<merge> { $$ = make_value ("S", $1); }
  ;

A:
  A1   %merge<merge> { $$ = make_value ("A", $1); }
  | A2 %merge<merge> { $$ = make_value ("A", $1); }
  ;

A1: 'a' { $$ = make_value ("A1", "'a'"); } ;
A2: 'a' { $$ = make_value ("A2", "'a'"); } ;
B:  'a' { $$ = make_value ("B", "'a'");  } ;

%%

static int
yylex (void)
{
  static char const *input = "a";
  return *input++;
}

int
main (void)
{
  return yyparse ();
}

static char *
make_value (char *parent, char *child)
{
  char const format[] = "%s <- %s";
  char *value = malloc (strlen (parent) + strlen (child) + sizeof format);
  sprintf (value, format, parent, child);
  return value;
}

static char *
merge (YYSTYPE s1, YYSTYPE s2)
{
  char const format[] = "merge{ %s and %s }";
  char *value = malloc (strlen (s1.ptr) + strlen (s2.ptr) + sizeof format);
  sprintf (value, format, s1.ptr, s2.ptr);
  return value;
}

static void
yyerror (char const *msg)
{
  fprintf (stderr, "%s\n", msg);
}
]])

AT_CHECK([[bison -o glr-regr4.c glr-regr4.y]], 0, [],
[glr-regr4.y: conflicts: 1 reduce/reduce
])
AT_COMPILE([glr-regr4])

AT_CHECK([[./glr-regr4]], 0,
[[merge{ S <- merge{ A <- A1 <- 'a' and A <- A2 <- 'a' } and S <- B <- 'a' }
]], [])

AT_CLEANUP


## ------------------------------------------------------------------------- ##
## User destructor for unresolved GLR semantic value                         ##
## Thanks to Joel E. Denny for this test; see                                ##
## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00016.html>.  ##
## ------------------------------------------------------------------------- ##

AT_SETUP([User destructor for unresolved GLR semantic value])

AT_DATA_GRAMMAR([glr-regr5.y],
[[%{
  #include <stdio.h>
  #include <stdlib.h>
  static void yyerror (char const *);
  static int yylex (void);
  enum { MAGIC_VALUE = -1057808125 }; /* originally chosen at random */
%}

%glr-parser
%union { int value; }
%type <value> start

%destructor {
  if ($$ != MAGIC_VALUE)
    {
      fprintf (stderr, "Bad destructor call.\n");
      exit (EXIT_FAILURE);
    }
} start

%%

start:
   'a' { $$ = MAGIC_VALUE; }
   | 'a' { $$ = MAGIC_VALUE; }
   ;

%%

static int
yylex (void)
{
  static char const *input = "a";
  return *input++;
}

static void
yyerror (char const *msg)
{
  fprintf (stderr, "%s\n", msg);
}

int
main (void)
{
  return yyparse () != 1;
}
]])

AT_CHECK([[bison -o glr-regr5.c glr-regr5.y]], 0, [],
[glr-regr5.y: conflicts: 1 reduce/reduce
])
AT_COMPILE([glr-regr5])

AT_CHECK([[./glr-regr5]], 0, [],
[syntax is ambiguous
])

AT_CLEANUP


## ------------------------------------------------------------------------- ##
## User destructor after an error during a split parse                       ##
## Thanks to Joel E. Denny for this test; see                                ##
## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00029.html>.  ##
## ------------------------------------------------------------------------- ##

AT_SETUP([User destructor after an error during a split parse])

AT_DATA_GRAMMAR([glr-regr6.y],
[[%{
  #include <stdio.h>
  #include <stdlib.h>
  static void yyerror (char const *);
  static int yylex (void);
%}

%glr-parser
%union { int value; }
%type <value> 'a'

%destructor {
  printf ("Destructor called.\n");
} 'a'

%%

start: 'a' | 'a' ;

%%

static int
yylex (void)
{
  static char const *input = "a";
  return *input++;
}

static void
yyerror (char const *msg)
{
  fprintf (stderr, "%s\n", msg);
}

int
main (void)
{
  return yyparse () != 1;
}
]])

AT_CHECK([[bison -o glr-regr6.c glr-regr6.y]], 0, [],
[glr-regr6.y: conflicts: 1 reduce/reduce
])
AT_COMPILE([glr-regr6])

AT_CHECK([[./glr-regr6]], 0,
[Destructor called.
],
[syntax is ambiguous
])

AT_CLEANUP
Commit	Line	Data
ede3d3bc	1	# Checking GLR Parsing: Regression Tests -- Autotest --
d6d67dbd	2	# Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
ede3d3bc PH	3
	4	# This program is free software; you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License as published by
	6	# the Free Software Foundation; either version 2, or (at your option)
	7	# any later version.
	8
	9	# This program is distributed in the hope that it will be useful,
	10	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	# GNU General Public License for more details.
	13
	14	# You should have received a copy of the GNU General Public License
	15	# along with this program; if not, write to the Free Software
0fb669f9 PE	16	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
0fb669f9 PE	17	# 02110-1301, USA.
ede3d3bc PH	18
	19	AT_BANNER([[GLR Regression Tests]])
	20
	21	## --------------------------- ##
	22	## Badly Collapsed GLR States. ##
	23	## --------------------------- ##
	24
	25	AT_SETUP([Badly Collapsed GLR States])
	26
	27	AT_DATA_GRAMMAR([glr-regr1.y],
	28	[[/* Regression Test: Improper state compression */
	29	/* Reported by Scott McPeak */
	30
	31	%{
	32	#include <stdio.h>
	33
	34	#define YYSTYPE int
	35	static YYSTYPE exprMerge (YYSTYPE x0, YYSTYPE x1);
	36	int yylex (void);
ac8c5689	37	void yyerror (char const *msg);
ede3d3bc PH	38	%}
	39
	40
	41	%glr-parser
	42
	43
	44	/* -------- productions ------ */
	45	%%
	46
	47	StartSymbol: E { $$=0; } %merge <exprMerge>
	48	;
	49
	50	E: E 'P' E { $$=1; printf("E -> E 'P' E\n"); } %merge <exprMerge>
	51	\| 'B' { $$=2; printf("E -> 'B'\n"); } %merge <exprMerge>
	52	;
	53
	54
	55
	56	/* ---------- C code ----------- */
	57	%%
	58
	59	static YYSTYPE exprMerge (YYSTYPE x0, YYSTYPE x1)
	60	{
	61	(void) x0;
	62	(void) x1;
	63	printf ("<OR>\n");
	64	return 0;
	65	}
	66
	67	int
	68	main (void)
	69	{
	70	return yyparse ();
	71	}
	72
ac8c5689	73	void
ede3d3bc PH	74	yyerror (char const *msg)
	75	{
	76	fprintf (stderr, "%s\n", msg);
ede3d3bc PH	77	}
	78
	79
	80	int
	81	yylex (void)
	82	{
	83	for (;;)
	84	{
	85	int ch = getchar ();
	86	if (ch == EOF)
	87	return 0;
	88	else if (ch == 'B' \|\| ch == 'P')
	89	return ch;
	90	}
	91	}
	92	]])
	93
	94	AT_CHECK([[bison -o glr-regr1.c glr-regr1.y]], 0, [],
	95	[glr-regr1.y: conflicts: 1 shift/reduce
	96	])
	97	AT_COMPILE([glr-regr1])
	98	AT_CHECK([[echo BPBPB \| ./glr-regr1]], 0,
	99	[[E -> 'B'
	100	E -> 'B'
	101	E -> E 'P' E
	102	E -> 'B'
	103	E -> E 'P' E
	104	E -> 'B'
	105	E -> E 'P' E
	106	E -> E 'P' E
	107	<OR>
	108	]], [])
	109
	110	AT_CLEANUP
	111
	112	## ------------------------------------------------------------ ##
	113	## Improper handling of embedded actions and $-N in GLR parsers ##
	114	## ------------------------------------------------------------ ##
	115
d6d67dbd	116	AT_SETUP([Improper handling of embedded actions and dollar(-N) in GLR parsers])
ede3d3bc PH	117
	118	AT_DATA_GRAMMAR([glr-regr2a.y],
	119	[[/* Regression Test: Improper handling of embedded actions and $-N */
	120	/* Reported by S. Eken */
	121
	122	%{
c70fdfcd	123	#define YYSTYPE char const *
ede3d3bc PH	124	#define yyfalse 0
	125	#define yytrue 1
	126
	127	#include <ctype.h>
	128	#include <stdio.h>
f508a6a0	129	#include <stdlib.h>
ede3d3bc PH	130	#include <string.h>
	131	int yylex (void);
	132	void yyerror (char const *);
	133	%}
	134
	135	%glr-parser
	136
	137	%%
	138
	139	command:
	140	's' var 't'
d6d67dbd	141	{ printf ("Variable: '%s'\n", $2); }
ede3d3bc PH	142	'v' 'x' 'q'
	143	\| 's' var_list 't' 'e'
	144	{ printf ("Varlist: '%s'\n", $2); }
	145	\| 's' var 't' var_printer 'x'
	146	;
	147
	148	var:
	149	'V'
	150	{ $$ = $1; }
	151	;
	152
	153	var_list:
	154	var
	155	{ $$ = $1; }
	156	\| var ',' var_list
	157	{
c70fdfcd PE	158	char s = (char ) malloc (strlen ($1) + 1 + strlen ($3) + 1);
	159	strcpy (s, $1);
	160	strcat (s, ",");
	161	strcat (s, $3);
	162	$$ = s;
d6d67dbd	163	}
ede3d3bc PH	164	;
	165
	166	var_printer: 'v'
	167	{ printf ("Variable: '%s'\n", $-1); }
	168
	169	%%
	170
	171	FILE *yyin = NULL;
	172
	173	int
	174	yylex (void)
d6d67dbd	175	{
ede3d3bc	176	char buf[50];
c70fdfcd	177	char *s;
ede3d3bc PH	178	switch (fscanf (yyin, " %1[a-z,]", buf)) {
	179	case 1:
	180	return buf[0];
	181	case EOF:
	182	return 0;
	183	default:
	184	break;
	185	}
f508a6a0	186	if (fscanf (yyin, "%49s", buf) != 1)
ac8c5689	187	return 0;
f508a6a0 PE	188	if (sizeof buf - 1 <= strlen (buf))
f508a6a0 PE	189	abort ();
c70fdfcd PE	190	s = (char *) malloc (strlen (buf) + 1);
	191	strcpy (s, buf);
	192	yylval = s;
ede3d3bc PH	193	return 'V';
	194	}
	195
	196	void
	197	yyerror (char const *s)
	198	{ printf ("%s\n", s);
	199	}
	200
	201	int
	202	main (int argc, char **argv)
d6d67dbd	203	{
ede3d3bc	204	yyin = stdin;
6100a9aa	205	if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
ede3d3bc PH	206	return yyparse ();
	207	}
	208	]])
	209
	210	AT_CHECK([[bison -o glr-regr2a.c glr-regr2a.y]], 0, [],
	211	[glr-regr2a.y: conflicts: 2 shift/reduce
	212	])
	213	AT_COMPILE([glr-regr2a])
	214
	215	AT_CHECK([[echo s VARIABLE_1 t v x q \| ./glr-regr2a]], 0,
	216	[[Variable: 'VARIABLE_1'
	217	]], [])
	218	AT_CHECK([[echo s VARIABLE_1 , ANOTHER_VARIABLE_2 t e \| ./glr-regr2a]], 0,
	219	[[Varlist: 'VARIABLE_1,ANOTHER_VARIABLE_2'
	220	]])
	221	AT_CHECK([[echo s VARIABLE_3 t v x \| ./glr-regr2a]], 0,
	222	[[Variable: 'VARIABLE_3'
	223	]], [])
	224
	225
5e6f62f2 PH	226	AT_CLEANUP
	227
	228	## ------------------------------------------------------------ ##
	229	## Improper merging of GLR delayed action sets ##
	230	## ------------------------------------------------------------ ##
	231
	232	AT_SETUP([Improper merging of GLR delayed action sets])
	233
	234	AT_DATA_GRAMMAR([glr-regr3.y],
	235	[[/* Regression Test: Improper merging of GLR delayed action sets. */
	236	/* Reported by M. Rosien */
	237
	238	%{
	239	#include <stdio.h>
	240	#include <stdarg.h>
	241
	242	static int MergeRule (int x0, int x1);
	243	static void yyerror(char const * s);
1beb0b24	244	int yylex (void);
5e6f62f2 PH	245
	246	#define RULE(x) (1 << (x))
	247
	248	%}
	249
	250	%glr-parser
	251
	252	%token BAD_CHAR
	253	%token P1 P2 T1 T2 T3 T4 O1 O2
	254
	255	%%
	256
	257	S : P1 T4 O2 NT6 P2 { printf ("Result: %x\n", $4); }
	258	;
	259
	260	NT1 : P1 T1 O1 T2 P2 { $$ = RULE(2); } %merge<MergeRule>
	261	;
	262
	263	NT2 : NT1 { $$ = RULE(3); } %merge<MergeRule>
	264	\| P1 NT1 O1 T3 P2 { $$ = RULE(4); } %merge<MergeRule>
	265	;
	266
	267	NT3 : T3 { $$ = RULE(5); } %merge<MergeRule>
	268	\| P1 NT1 O1 T3 P2 { $$ = RULE(6); } %merge<MergeRule>
	269	;
	270
	271	NT4 : NT3 { $$ = RULE(7); } %merge<MergeRule>
	272	\| NT2 { $$ = RULE(8); } %merge<MergeRule>
	273	\| P1 NT2 O1 NT3 P2 { $$ = RULE(9); } %merge<MergeRule>
	274	;
	275
	276	NT5 : NT4 { $$ = RULE(10); } %merge<MergeRule>
	277	;
	278
	279	NT6 : P1 NT1 O1 T3 P2 { $$ = RULE(11) \| $2; } %merge<MergeRule>
	280	\| NT5 { $$ = RULE(12) \| $1; } %merge<MergeRule>
	281	;
	282
	283	%%
	284
	285	static int MergeRule (int x0, int x1) {
	286	return x0 \| x1;
	287	}
	288
	289	static void yyerror(char const * s) {
	290	fprintf(stderr,"error: %s\n",s);
	291	}
	292
	293	FILE *yyin = NULL;
	294
	295	int P[] = { P1, P2 };
	296	int O[] = { O1, O2 };
	297	int T[] = { T1, T2, T3, T4 };
	298
	299	int yylex (void)
	300	{
	301	char inp[3];
	302	if (fscanf (yyin, "%2s", inp) == EOF)
	303	return 0;
1beb0b24	304	switch (inp[0])
5e6f62f2 PH	305	{
	306	case 'p': return P[inp[1] - '1'];
	307	case 't': return T[inp[1] - '1'];
	308	case 'o': return O[inp[1] - '1'];
	309	}
	310	return BAD_CHAR;
	311	}
	312
	313	int main(int argc, char* argv[]) {
	314	yyin = stdin;
6100a9aa	315	if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
5e6f62f2 PH	316	return yyparse ();
	317	}
	318	]])
	319
	320	AT_CHECK([[bison -o glr-regr3.c glr-regr3.y]], 0, [],
	321	[glr-regr3.y: conflicts: 1 shift/reduce, 1 reduce/reduce
	322	])
	323	AT_COMPILE([glr-regr3])
	324
	325	AT_CHECK([[echo p1 t4 o2 p1 p1 t1 o1 t2 p2 o1 t3 p2 p2 \| ./glr-regr3]], 0,
	326	[[Result: 1c04
	327	]], [])
	328
ede3d3bc	329	AT_CLEANUP
f9315de5 PE	330
	331
	332	## ---------------------------------------------------------------------- ##
	333	## Duplicate representation of merged trees ##
	334	## Thanks to Joel E. Denny for this test; see ##
	335	## <http://lists.gnu.org/archive/html/help-bison/2005-07/msg00013.html>. ##
	336	## ---------------------------------------------------------------------- ##
	337
	338	AT_SETUP([Duplicate representation of merged trees])
	339
	340	AT_DATA_GRAMMAR([glr-regr4.y],
	341	[[%union { char *ptr; }
	342	%type <ptr> S A A1 A2 B
	343	%glr-parser
	344
	345	%{
	346	#include <stdio.h>
	347	#include <stdlib.h>
	348	#include <string.h>
	349	static char *merge (YYSTYPE, YYSTYPE);
	350	static char make_value (char , char *);
	351	static void yyerror (char const *);
	352	static int yylex (void);
	353	%}
	354
	355	%%
	356
	357	tree: S { printf ("%s\n", $1); } ;
	358
	359	S:
	360	A %merge<merge> { $$ = make_value ("S", $1); }
	361	\| B %merge<merge> { $$ = make_value ("S", $1); }
	362	;
	363
	364	A:
	365	A1 %merge<merge> { $$ = make_value ("A", $1); }
	366	\| A2 %merge<merge> { $$ = make_value ("A", $1); }
	367	;
	368
	369	A1: 'a' { $$ = make_value ("A1", "'a'"); } ;
	370	A2: 'a' { $$ = make_value ("A2", "'a'"); } ;
	371	B: 'a' { $$ = make_value ("B", "'a'"); } ;
	372
	373	%%
	374
	375	static int
	376	yylex (void)
	377	{
	378	static char const *input = "a";
	379	return *input++;
	380	}
	381
	382	int
	383	main (void)
	384	{
	385	return yyparse ();
	386	}
	387
	388	static char *
	389	make_value (char parent, char child)
	390	{
	391	char const format[] = "%s <- %s";
	392	char *value = malloc (strlen (parent) + strlen (child) + sizeof format);
	393	sprintf (value, format, parent, child);
394	return value;
395	}
396
397	static char *
398	merge (YYSTYPE s1, YYSTYPE s2)
399	{
400	char const format[] = "merge{ %s and %s }";
401	char *value = malloc (strlen (s1.ptr) + strlen (s2.ptr) + sizeof format);
402	sprintf (value, format, s1.ptr, s2.ptr);
403	return value;
404	}
405
406	static void
407	yyerror (char const *msg)
408	{
42a6501d	409	fprintf (stderr, "%s\n", msg);
f9315de5 PE	410	}
	411	]])
	412
	413	AT_CHECK([[bison -o glr-regr4.c glr-regr4.y]], 0, [],
	414	[glr-regr4.y: conflicts: 1 reduce/reduce
	415	])
	416	AT_COMPILE([glr-regr4])
	417
	418	AT_CHECK([[./glr-regr4]], 0,
	419	[[merge{ S <- merge{ A <- A1 <- 'a' and A <- A2 <- 'a' } and S <- B <- 'a' }
	420	]], [])
	421
	422	AT_CLEANUP
adc90f13 PE	423
adc90f13 PE	424
42a6501d PE	425	## ------------------------------------------------------------------------- ##
	426	## User destructor for unresolved GLR semantic value ##
	427	## Thanks to Joel E. Denny for this test; see ##
	428	## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00016.html>. ##
	429	## ------------------------------------------------------------------------- ##
adc90f13 PE	430
	431	AT_SETUP([User destructor for unresolved GLR semantic value])
	432
	433	AT_DATA_GRAMMAR([glr-regr5.y],
	434	[[%{
	435	#include <stdio.h>
	436	#include <stdlib.h>
	437	static void yyerror (char const *);
	438	static int yylex (void);
	439	enum { MAGIC_VALUE = -1057808125 }; /* originally chosen at random */
	440	%}
	441
	442	%glr-parser
	443	%union { int value; }
	444	%type <value> start
	445
	446	%destructor {
	447	if ($$ != MAGIC_VALUE)
	448	{
	449	fprintf (stderr, "Bad destructor call.\n");
	450	exit (EXIT_FAILURE);
	451	}
	452	} start
	453
	454	%%
	455
	456	start:
	457	'a' { $$ = MAGIC_VALUE; }
	458	\| 'a' { $$ = MAGIC_VALUE; }
	459	;
	460
	461	%%
	462
	463	static int
	464	yylex (void)
	465	{
	466	static char const *input = "a";
	467	return *input++;
	468	}
	469
	470	static void
	471	yyerror (char const *msg)
	472	{
42a6501d	473	fprintf (stderr, "%s\n", msg);
adc90f13 PE	474	}
	475
	476	int
	477	main (void)
	478	{
	479	return yyparse () != 1;
	480	}
	481	]])
	482
	483	AT_CHECK([[bison -o glr-regr5.c glr-regr5.y]], 0, [],
	484	[glr-regr5.y: conflicts: 1 reduce/reduce
	485	])
	486	AT_COMPILE([glr-regr5])
	487
42a6501d PE	488	AT_CHECK([[./glr-regr5]], 0, [],
	489	[syntax is ambiguous
	490	])
	491
	492	AT_CLEANUP
	493
	494
	495	## ------------------------------------------------------------------------- ##
	496	## User destructor after an error during a split parse ##
	497	## Thanks to Joel E. Denny for this test; see ##
	498	## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00029.html>. ##
	499	## ------------------------------------------------------------------------- ##
	500
	501	AT_SETUP([User destructor after an error during a split parse])
	502
	503	AT_DATA_GRAMMAR([glr-regr6.y],
	504	[[%{
	505	#include <stdio.h>
	506	#include <stdlib.h>
	507	static void yyerror (char const *);
	508	static int yylex (void);
	509	%}
	510
	511	%glr-parser
	512	%union { int value; }
	513	%type <value> 'a'
	514
	515	%destructor {
	516	printf ("Destructor called.\n");
	517	} 'a'
	518
	519	%%
	520
	521	start: 'a' \| 'a' ;
	522
	523	%%
	524
	525	static int
	526	yylex (void)
	527	{
	528	static char const *input = "a";
	529	return *input++;
	530	}
	531
	532	static void
	533	yyerror (char const *msg)
	534	{
	535	fprintf (stderr, "%s\n", msg);
	536	}
	537
	538	int
	539	main (void)
	540	{
	541	return yyparse () != 1;
	542	}
	543	]])
	544
	545	AT_CHECK([[bison -o glr-regr6.c glr-regr6.y]], 0, [],
	546	[glr-regr6.y: conflicts: 1 reduce/reduce
	547	])
	548	AT_COMPILE([glr-regr6])
	549
	550	AT_CHECK([[./glr-regr6]], 0,
	551	[Destructor called.
552	],
adc90f13 PE	553	[syntax is ambiguous
	554	])
	555
	556	AT_CLEANUP