]])
AT_CHECK([bison input.y -d -v -o input.c])
-AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
-AT_CHECK([./input], 0,
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
[[0123456789
]])
]])
AT_CHECK([bison input.y -d -v -o input.c])
-AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
-AT_CHECK([./input], 0,
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
[[15
]])
-## ------------- ##
-## Destructors. ##
-## ------------- ##
+## -------------------------- ##
+## Printers and Destructors. ##
+## -------------------------- ##
-AT_SETUP([Destructors])
+AT_SETUP([Printers and Destructors])
# Make sure complex $n work.
#define YYERROR_VERBOSE 1
#define YYDEBUG 1
-/* #define YYPRINT yyprint */
-
-static int yylex (void);
-static void yyerror (const char *msg);
-static void yyprint (FILE *out, int toknum, int tokval);
%}
-
+%verbose
%union
{
int ival;
}
-%type <ival> thing 'x'
-%destructor { printf ("Freeing thing %d\n", $$); } thing
-%destructor { printf ("Freeing 'x' %d\n", $$); } 'x'
+%type <ival> 'x' thing line input
+
+%printer { fprintf (yyout, "%d from %d", $$, @$.first_line); }
+ input line thing 'x'
+
+%destructor
+ {
+ fprintf (stdout, "Freeing ");
+ /* FIXME: Ouch: INTERNAL DETAILS EXPOSED HERE. */
+ /* Cannot use $$ which is the union member, not the union itself. */
+ yysymprint (stdout, yytype, yyvalue, @$);
+ fprintf (stdout, "\n");
+ }
+ input line thing 'x'
+
+%{
+static int yylex (void);
+static void yyerror (const char *msg);
+%}
+
%%
input:
/* Nothing. */
-| input line
+ {
+ $$ = 0;
+ printf ("input(%d): /* Nothing */';'\n", $$);
+ }
+| line input /* Right recursive to load the stack so that popping at
+ EOF can be exercised. */
+ {
+ $$ = 2;
+ printf ("input(%d): line(%d) input(%d)';'\n", $$, $1, $2);
+ }
;
line:
thing thing thing ';'
- { printf ("input: thing(%d) thing(%d) thing(%d) ';'\n", $1, $2, $3); }
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) thing(%d) thing(%d) ';'\n", $$, $1, $2, $3);
+ }
| thing thing ';'
- { printf ("input: thing(%d) thing(%d) ';'\n", $1, $2); }
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) thing(%d) ';'\n", $$, $1, $2);
+ }
| thing ';'
- { printf ("input: thing(%d) ';'\n", $1); }
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) ';'\n", $$, $1);
+ }
| error ';'
- { printf ("input: error ';'\n"); }
+ {
+ $$ = -1;
+ printf ("line(%d): error ';'\n", $$);
+ }
;
thing:
- 'x' { printf ("thing: 'x' (%d)\n", $1); $$ = $1; }
+ 'x'
+ {
+ $$ = $1;
+ printf ("thing(%d): 'x'(%d)\n", $$, $1);
+ }
;
%%
static int
yylex (void)
{
- static const int input[] =
+ static const unsigned int input[] =
{
+ /* Exericise the discarding of stack top and input until `error'
+ can be reduced. */
'x', 'x', 'x', 'x', 'x', 'x', ';',
+
+ /* Load the stack and provoke an error that cannot be caught by
+ the grammar, to check that the stack is cleared. */
'x', 'x', ';',
'x', ';',
- 'x', 'y', ';'
+ 'y'
};
- static int counter = 0;
+ static unsigned int counter = 0;
if (counter < (sizeof(input) / sizeof (input[0])))
{
yylval.ival = counter;
- return input[counter++];
+ /* As in BASIC, line numbers go from 10 to 10. */
+ yylloc.first_line = 10 * counter;
+ printf ("sending: '%c' (value = %d, line %d)\n",
+ input[counter], yylval.ival, yylloc.first_line);
+ return (int) input[counter++];
}
else
- return EOF;
+ {
+ printf ("sending: EOF\n");
+ return EOF;
+ }
}
static void
yyerror (const char *msg)
{
- fprintf (stdout, "%s\n", msg);
-}
-
-static void
-yyprint (FILE *out, int toknum, int tokval)
-{
- if (0 < toknum && toknum < 256)
- fprintf (out, " = %d", tokval);
+ fprintf (stdout, "%d: %s\n", yylloc.first_line, msg);
}
int
}
]])
-AT_CHECK([bison input.y -d -v -o input.c])
-AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
-AT_CHECK([./input], 0,
-[[thing: 'x' (0)
-thing: 'x' (1)
-thing: 'x' (2)
-parse error, unexpected 'x', expecting ';'
-Freeing thing 2
-Freeing thing 1
-Freeing thing 0
-Freeing 'x' 3
-Freeing 'x' 4
-Freeing 'x' 5
-input: error ';'
-thing: 'x' (7)
-thing: 'x' (8)
-input: thing(7) thing(8) ';'
-thing: 'x' (10)
-input: thing(10) ';'
-thing: 'x' (12)
-parse error, unexpected $undefined., expecting 'x' or ';'
-Freeing thing 12
-input: error ';'
-Successful parse.
+AT_CHECK([bison input.y --location -d -v -o input.c])
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 1,
+[[sending: 'x' (value = 0, line 0)
+thing(0): 'x'(0)
+sending: 'x' (value = 1, line 10)
+thing(1): 'x'(1)
+sending: 'x' (value = 2, line 20)
+thing(2): 'x'(2)
+sending: 'x' (value = 3, line 30)
+30: parse error, unexpected 'x', expecting ';'
+Freeing nterm thing (2 from 20)
+Freeing nterm thing (1 from 10)
+Freeing nterm thing (0 from 0)
+Freeing token 'x' (3 from 30)
+sending: 'x' (value = 4, line 40)
+Freeing token 'x' (4 from 40)
+sending: 'x' (value = 5, line 50)
+Freeing token 'x' (5 from 50)
+sending: ';' (value = 6, line 60)
+line(-1): error ';'
+sending: 'x' (value = 7, line 70)
+thing(7): 'x'(7)
+sending: 'x' (value = 8, line 80)
+thing(8): 'x'(8)
+sending: ';' (value = 9, line 90)
+line(7): thing(7) thing(8) ';'
+sending: 'x' (value = 10, line 100)
+thing(10): 'x'(10)
+sending: ';' (value = 11, line 110)
+line(10): thing(10) ';'
+sending: 'y' (value = 12, line 120)
+120: parse error, unexpected $undefined, expecting $end or 'x'
+sending: EOF
+Freeing nterm line (10 from 100)
+Freeing nterm line (7 from 70)
+Freeing nterm line (-1 from 50)
+Parsing FAILED.
]])
AT_CLEANUP
projects / bison.git / blobdiff