+
+
+
+## ---------------- ##
+## 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, $4, 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: $5])
+
+# Make sure complex $n work.
+
+AT_DATA_GRAMMAR([[input.y]],
+[[$5
+%{
+#include <stdio.h>
+#include <stdlib.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 (yyoutput, "%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) ';' (%d@%d-%d)\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
+ $3, RANGE (@3), $4, RANGE (@4));
+ }
+| thing thing ';'
+ {
+ $$ = $1;
+ printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) ';' (%d@%d-%d)\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3));
+ }
+| thing ';'
+ {
+ $$ = $1;
+ printf ("line (%d@%d-%d): thing (%d@%d-%d) ';' (%d@%d-%d)\n",
+ $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
+ }
+| error ';'
+ {
+ $$ = -1;
+ printf ("line (%d@%d-%d): error (@%d-%d) ';' (%d@%d-%d)\n",
+ $$, RANGE (@$), RANGE (@1), $2, RANGE (@2));
+ }
+;
+
+thing:
+ 'x'
+ {
+ $$ = $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) ';' (6@60-69)
+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) ';' (9@90-99)
+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) ';' (11@110-119)
+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], $[4], [$1])
+])
+
+
+AT_CHECK_PRINTER_AND_DESTRUCTOR()
+
+# This test fails, but the test case is questionable.
+#AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])
projects / bison.git / blobdiff