#define YYSTYPE int
static YYSTYPE exprMerge (YYSTYPE x0, YYSTYPE x1);
int yylex (void);
-int yyerror (char const *msg);
+void yyerror (char const *msg);
%}
return yyparse ();
}
-int
+void
yyerror (char const *msg)
{
fprintf (stderr, "%s\n", msg);
- exit (4);
}
/* Reported by S. Eken */
%{
- #define YYSTYPE char *
+ #define YYSTYPE char const *
#define yyfalse 0
#define yytrue 1
{ $$ = $1; }
| var ',' var_list
{
- $$ = malloc (strlen ($1) + 1 + strlen ($3) + 1);
- strcpy ($$, $1);
- strcat ($$, ",");
- strcat ($$, $3);
+ char *s = (char *) malloc (strlen ($1) + 1 + strlen ($3) + 1);
+ strcpy (s, $1);
+ strcat (s, ",");
+ strcat (s, $3);
+ $$ = s;
}
;
yylex (void)
{
char buf[50];
+ char *s;
switch (fscanf (yyin, " %1[a-z,]", buf)) {
case 1:
return buf[0];
break;
}
if (fscanf (yyin, "%49s", buf) != 1)
- abort ();
+ return 0;
if (sizeof buf - 1 <= strlen (buf))
abort ();
- yylval = malloc (strlen (buf) + 1);
- strcpy (yylval, buf);
+ s = (char *) malloc (strlen (buf) + 1);
+ strcpy (s, buf);
+ yylval = s;
return 'V';
}
main (int argc, char **argv)
{
yyin = stdin;
- if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 1;
+ if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
return yyparse ();
}
]])
int main(int argc, char* argv[]) {
yyin = stdin;
- if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 1;
+ if (argc == 2 && !(yyin = fopen (argv[1], "r"))) return 3;
return yyparse ();
}
]])
]], [])
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 const *, char const *);
+ 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' { $$ = make_value ("B", "'a'"); } ;
+
+%%
+
+static int
+yylex (void)
+{
+ static char const *input = "a";
+ return *input++;
+}
+
+int
+main (void)
+{
+ return yyparse ();
+}
+
+static char *
+make_value (char const *parent, char const *child)
+{
+ char const format[] = "%s <- %s";
+ char *value =
+ (char *) malloc (strlen (parent) + strlen (child) + sizeof format);
+ sprintf (value, format, parent, child);
+ return value;
+}
+
+static char *
+merge (YYSTYPE s1, YYSTYPE s2)
+{
+ char const format[] = "merge{ %s and %s }";
+ char *value =
+ (char *) malloc (strlen (s1.ptr) + strlen (s2.ptr) + sizeof format);
+ sprintf (value, format, s1.ptr, s2.ptr);
+ return value;
+}
+
+static void
+yyerror (char const *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+]])
+
+AT_CHECK([[bison -o glr-regr4.c glr-regr4.y]], 0, [],
+[glr-regr4.y: conflicts: 1 reduce/reduce
+])
+AT_COMPILE([glr-regr4])
+
+AT_CHECK([[./glr-regr4]], 0,
+[[merge{ S <- merge{ A <- A1 <- 'a' and A <- A2 <- 'a' } and S <- B <- 'a' }
+]], [])
+
+AT_CLEANUP
+
+
+## ------------------------------------------------------------------------- ##
+## User destructor for unresolved GLR semantic value ##
+## Thanks to Joel E. Denny for this test; see ##
+## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00016.html>. ##
+## ------------------------------------------------------------------------- ##
+
+AT_SETUP([User destructor for unresolved GLR semantic value])
+
+AT_DATA_GRAMMAR([glr-regr5.y],
+[[
+%{
+ #include <stdio.h>
+ #include <stdlib.h>
+ static void yyerror (char const *);
+ static int yylex (void);
+ enum { MAGIC_VALUE = -1057808125 }; /* originally chosen at random */
+%}
+
+%glr-parser
+%union { int value; }
+%type <value> start
+
+%destructor {
+ if ($$ != 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
+
+
+## ------------------------------------------------------------------------- ##
+## Duplicated user destructor for lookahead ##
+## Thanks to Joel E. Denny for this test; see ##
+## <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00035.html>. ##
+## ------------------------------------------------------------------------- ##
+
+AT_SETUP([Duplicated user destructor for lookahead])
+
+AT_DATA_GRAMMAR([glr-regr7.y],
+[[
+%{
+ #include <stdio.h>
+ #include <stdlib.h>
+ static void yyerror (char const *);
+ static int yylex (void);
+ #define YYSTACKEXPANDABLE 0
+%}
+
+%glr-parser
+%union { int *count; }
+%type <count> 'a'
+
+%destructor {
+ if ((*$$)++)
+ fprintf (stderr, "Destructor called on same value twice.\n");
+} 'a'
+
+%%
+
+start:
+ stack1 start
+ | stack2 start
+ | /* empty */
+ ;
+stack1: 'a' ;
+stack2: 'a' ;
+
+%%
+
+static int
+yylex (void)
+{
+ yylval.count = malloc (sizeof (int));
+ if (!yylval.count)
+ {
+ fprintf (stderr, "Test inconclusive.\n");
+ exit (EXIT_FAILURE);
+ }
+ *yylval.count = 0;
+ return 'a';
+}
+
+static void
+yyerror (char const *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+int
+main (void)
+{
+ return yyparse ();
+}
+]])
+
+AT_CHECK([[bison -o glr-regr7.c glr-regr7.y]], 0, [],
+[glr-regr7.y: conflicts: 2 reduce/reduce
+])
+AT_COMPILE([glr-regr7])
+
+AT_CHECK([[exit 77; ./glr-regr7]], 2, [],
+[memory exhausted
+])
+
+AT_CLEANUP
projects / bison.git / blobdiff