# instead of being attached to the empty rule dedicated to this
# action.
-AT_DATA([[input.y]],
+AT_DATA_GRAMMAR([[input.y]],
[[%{
# include <stdio.h>
# include <stdlib.h>
}
]])
-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_CHECK([bison -d -v -o input.c input.y])
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
[[0123456789
]])
AT_CLEANUP
+
+
+
+## ---------------------- ##
+## Actions after errors. ##
+## ---------------------- ##
+
+AT_SETUP([Actions after errors])
+
+
+
+AT_DATA_GRAMMAR([[input.y]],
+[[%{
+#include <stdio.h>
+#include <stdlib.h>
+
+static int yylex (void);
+static void yyerror (char const *);
+
+#define YYDEBUG 1
+%}
+%union { int ival; }
+%type <ival> 'x' ';' thing line input
+
+%%
+input:
+ /* Nothing. */
+ {
+ $$ = 0;
+ printf ("input(%d): /* Nothing */\n", $$);
+ }
+| 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 ';'
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) thing(%d) thing(%d) ';'(%d)\n",
+ $$, $1, $2, $3, $4);
+ }
+| thing thing ';'
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) thing(%d) ';'(%d)\n", $$, $1, $2, $3);
+ }
+| thing ';'
+ {
+ $$ = $1;
+ printf ("line(%d): thing(%d) ';'(%d)\n", $$, $1, $2);
+ }
+| error ';'
+ {
+ $$ = -1;
+ printf ("line(%d): error ';'(%d)\n", $$, $2);
+ }
+;
+
+thing:
+ 'x'
+ {
+ $$ = $1;
+ printf ("thing(%d): 'x'(%d)\n", $$, $1);
+ }
+;
+%%
+static size_t counter;
+
+static int
+yylex (void)
+{
+ static char const 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', ';',
+ 'y'
+ };
+
+ if (counter < sizeof input)
+ {
+ yylval.ival = counter;
+ printf ("sending: '%c' (value = %d)\n", input[counter], yylval.ival);
+ return input[counter++];
+ }
+ else
+ {
+ printf ("sending: EOF\n");
+ return EOF;
+ }
+}
+
+static void
+yyerror (char const *msg)
+{
+ printf ("%lu: %s\n", (unsigned long int) counter, msg);
+}
+
+int
+main (void)
+{
+ yydebug = !!getenv ("YYDEBUG");
+ return yyparse ();
+}
+]])
+
+AT_CHECK([bison -o input.c input.y])
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 1,
+[[sending: 'x' (value = 0)
+thing(0): 'x'(0)
+sending: 'x' (value = 1)
+thing(1): 'x'(1)
+sending: 'x' (value = 2)
+thing(2): 'x'(2)
+sending: 'x' (value = 3)
+4: syntax error
+sending: 'x' (value = 4)
+sending: 'x' (value = 5)
+sending: ';' (value = 6)
+line(-1): error ';'(6)
+sending: 'x' (value = 7)
+thing(7): 'x'(7)
+sending: 'x' (value = 8)
+thing(8): 'x'(8)
+sending: ';' (value = 9)
+line(7): thing(7) thing(8) ';'(9)
+sending: 'x' (value = 10)
+thing(10): 'x'(10)
+sending: ';' (value = 11)
+line(10): thing(10) ';'(11)
+sending: 'y' (value = 12)
+13: syntax error
+sending: EOF
+]])
+
+AT_CLEANUP
+
+
+
+## ---------------- ##
+## Exotic Dollars. ##
+## ---------------- ##
+
+AT_SETUP([Exotic Dollars])
+
+AT_DATA_GRAMMAR([[input.y]],
+[[%{
+# include <stdio.h>
+# include <stdlib.h>
+ static void yyerror (const char *msg);
+ static int yylex (void);
+# define YYDEBUG 1
+# define YYERROR_VERBOSE 1
+%}
+
+%union
+{
+ int val;
+};
+
+%type <val> a_1 a_2 a_5
+ sum_of_the_five_previous_values
+
+%%
+exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5
+ sum_of_the_five_previous_values
+ {
+ printf ("%d\n", $6);
+ }
+;
+a_1: { $$ = 1; };
+a_2: { $$ = 2; };
+a_5: { $$ = 5; };
+
+sum_of_the_five_previous_values:
+ {
+ $$ = $<val>0 + $<val>-1 + $<val>-2 + $<val>-3 + $<val>-4;
+ }
+;
+
+%%
+static int
+yylex (void)
+{
+ return EOF;
+}
+
+static void
+yyerror (const char *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+int
+main (void)
+{
+ return yyparse ();
+}
+]])
+
+AT_CHECK([bison -d -v -o input.c input.y])
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
+[[15
+]])
+
+AT_CLEANUP
+
+
+
+## -------------------------- ##
+## Printers and Destructors. ##
+## -------------------------- ##
+
+# _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, BISON-DIRECTIVE)
+# -------------------------------------------------------------
+m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],
+[m4_if([$1$2$3], $[1]$[2]$[3], [],
+ [m4_fatal([$0: Invalid arguments: $@])])dnl
+
+AT_SETUP([Printers and Destructors: $4])
+
+# Make sure complex $n work.
+
+AT_DATA_GRAMMAR([[input.y]],
+[[$4
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#define RANGE(Location) (Location).first_line, (Location).last_line
+static int yylex (void);
+static void yyerror (const char *msg);
+%}
+%error-verbose
+%debug
+%verbose
+%locations
+%union
+{
+ int ival;
+}
+%type <ival> 'x' thing line input
+
+%printer { fprintf (yyout, "%d@%d-%d", $$, RANGE (@$)); }
+ input line thing 'x'
+
+%destructor
+ { printf ("Freeing nterm input (%d@%d-%d)\n", $$, RANGE (@$)); }
+ input
+
+%destructor
+ { printf ("Freeing nterm line (%d@%d-%d)\n", $$, RANGE (@$)); }
+ line
+
+%destructor
+ { printf ("Freeing nterm thing (%d@%d-%d)\n", $$, RANGE (@$)); }
+ thing
+
+%destructor
+ { printf ("Freeing token 'x' (%d@%d-%d)\n", $$, RANGE (@$)); }
+ 'x'
+
+%%
+input:
+ /* Nothing. */
+ {
+ $$ = 0;
+ printf ("input (%d@%d-%d): /* Nothing */';'\n", $$, RANGE (@$));
+ }
+| line input /* Right recursive to load the stack so that popping at
+ EOF can be exercised. */
+ {
+ $$ = 2;
+ printf ("input (%d@%d-%d): line (%d@%d-%d) input (%d@%d-%d)';'\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
+ }
+;
+
+line:
+ thing thing thing ';'
+ {
+ $$ = $1;
+ printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ';'\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
+ $3, RANGE (@3));
+ }
+| thing thing ';'
+ {
+ $$ = $1;
+ printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) ';'\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
+ }
+| thing ';'
+ {
+ $$ = $1;
+ printf ("line (%d@%d-%d): thing (%d@%d-%d) ';'\n",
+ $$, RANGE (@$), $1, RANGE (@1));
+ }
+| error ';'
+ {
+ $$ = -1;
+ printf ("line (%d@%d-%d): error (@%d-%d) ';'\n",
+ $$, RANGE (@$), RANGE (@1));
+ }
+;
+
+thing:
+ 'x'
+ {
+ $$ = $1;
+ printf ("thing (%d@%d-%d): 'x' (%d@%d-%d)\n",
+ $$, RANGE (@$), $1, RANGE (@1));
+ }
+;
+%%
+static int
+yylex (void)
+{
+ static const unsigned int input[] =
+ {
+ /* Exercise 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', ';',
+ 'y'
+ };
+ static unsigned int counter = 0;
+
+ if (counter < (sizeof(input) / sizeof (input[0])))
+ {
+ yylval.ival = counter;
+ /* As in BASIC, line numbers go from 10 to 10. */
+ yylloc.first_line = yylloc.first_column = 10 * counter;
+ yylloc.last_line = yylloc.last_column = yylloc.first_line + 9;
+ printf ("sending: '%c' (%d@%d-%d)\n",
+ input[counter], yylval.ival, RANGE (yylloc));
+ return (int) input[counter++];
+ }
+ else
+ {
+ printf ("sending: EOF\n");
+ return EOF;
+ }
+}
+
+static void
+yyerror (const char *msg)
+{
+ printf ("%d-%d: %s\n", RANGE (yylloc), msg);
+}
+
+int
+main (void)
+{
+ yydebug = !!getenv ("YYDEBUG");
+ if (yyparse ())
+ {
+ printf ("Parsing FAILED.\n");
+ exit (1);
+ }
+ printf ("Successful parse.\n");
+ return 0;
+}
+]])
+
+AT_CHECK([bison -o input.c input.y])
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 1,
+[[sending: 'x' (0@0-9)
+thing (0@0-9): 'x' (0@0-9)
+sending: 'x' (1@10-19)
+thing (1@10-19): 'x' (1@10-19)
+sending: 'x' (2@20-29)
+thing (2@20-29): 'x' (2@20-29)
+sending: 'x' (3@30-39)
+30-39: syntax error, unexpected 'x', expecting ';'
+Freeing nterm thing (2@20-29)
+Freeing nterm thing (1@10-19)
+Freeing nterm thing (0@0-9)
+Freeing token 'x' (3@30-39)
+sending: 'x' (4@40-49)
+Freeing token 'x' (4@40-49)
+sending: 'x' (5@50-59)
+Freeing token 'x' (5@50-59)
+sending: ';' (6@60-69)
+line (-1@50-69): error (@50-59) ';'
+sending: 'x' (7@70-79)
+thing (7@70-79): 'x' (7@70-79)
+sending: 'x' (8@80-89)
+thing (8@80-89): 'x' (8@80-89)
+sending: ';' (9@90-99)
+line (7@70-99): thing (7@70-79) thing (8@80-89) ';'
+sending: 'x' (10@100-109)
+thing (10@100-109): 'x' (10@100-109)
+sending: ';' (11@110-119)
+line (10@100-119): thing (10@100-109) ';'
+sending: 'y' (12@120-129)
+120-129: syntax error, unexpected $undefined, expecting $end or 'x'
+sending: EOF
+Freeing nterm line (10@100-119)
+Freeing nterm line (7@70-99)
+Freeing nterm line (-1@50-69)
+Parsing FAILED.
+]])
+
+AT_CLEANUP
+])
+
+
+# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS])
+# ------------------------------------------------
+# Produce `calc.y'.
+m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
+[_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], [$1])
+])
+
+
+AT_CHECK_PRINTER_AND_DESTRUCTOR()
+AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])
projects / bison.git / blobdiff