* src/state.h, src/state.c (state_new): New, extracted from...

[bison.git] / tests / actions.at

diff --git a/tests/actions.at b/tests/actions.at
index ed56174bccf787021a74f9764a6f7e01cbbd009b..5331bfc61cb14b85a3e38468663eaf796d39898d 100644 (file)
--- a/tests/actions.at
+++ b/tests/actions.at
@@ -88,8 +88,6 @@ AT_CLEANUP
 
 AT_SETUP([Exotic Dollars])
 
-# Make sure complex $n work.
-
 AT_DATA([[input.y]],
 [[%{
 # include <stdio.h>
@@ -152,3 +150,189 @@ AT_CHECK([./input], 0,
 ]])
 
 AT_CLEANUP
+
+
+
+## -------------------------- ##
+## Printers and Destructors.  ##
+## -------------------------- ##
+
+AT_SETUP([Printers and Destructors])
+
+# Make sure complex $n work.
+
+AT_DATA([[input.y]],
+[[%{
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#define YYERROR_VERBOSE 1
+#define YYDEBUG 1
+%}
+%verbose
+%union
+{
+  int ival;
+}
+%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. */
+    {
+      $$ = 0;
+      printf ("input(%d): /* Nothing */';'\n", $$);
+    }
+| 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 ';'
+    {
+      $$ = $1;
+      printf ("line(%d): thing(%d) thing(%d) thing(%d) ';'\n", $$, $1, $2, $3);
+    }
+| thing thing ';'
+    {
+      $$ = $1;
+      printf ("line(%d): thing(%d) thing(%d) ';'\n", $$, $1, $2);
+    }
+| thing ';'
+    {
+      $$ = $1;
+      printf ("line(%d): thing(%d) ';'\n", $$, $1);
+    }
+| error ';'
+    {
+      $$ = -1;
+      printf ("line(%d): error ';'\n", $$);
+    }
+;
+
+thing:
+  'x'
+    {
+      $$ = $1;
+      printf ("thing(%d): 'x'(%d)\n", $$, $1);
+    }
+;
+%%
+static int
+yylex (void)
+{
+  static const unsigned int input[] =
+    {
+      /* Exericise the discarding of stack top and input until `error'
+         can be reduced.  */
+      'x', 'x', 'x', 'x', 'x', 'x', ';',
+
+      /* Load the stack and provoke an error that cannot be caught by
+         the grammar, to check that the stack is cleared. */
+      'x', 'x', ';',
+      'x', ';',
+      'y'
+    };
+  static unsigned int counter = 0;
+
+  if (counter < (sizeof(input) / sizeof (input[0])))
+    {
+       yylval.ival = counter;
+       /* As in BASIC, line numbers go from 10 to 10.  */
+       yylloc.first_line = 10 * counter;
+       printf ("sending: '%c' (value = %d, line %d)\n",
+               input[counter], yylval.ival, yylloc.first_line);
+       return (int) input[counter++];
+    }
+  else
+    {
+      printf ("sending: EOF\n");
+      return EOF;
+    }
+}
+
+static void
+yyerror (const char *msg)
+{
+  fprintf (stdout, "%d: %s\n", yylloc.first_line, msg);
+}
+
+int
+main (void)
+{
+  yydebug = !!getenv ("YYDEBUG");
+  if (yyparse ())
+    {
+      fprintf (stdout, "Parsing FAILED.\n");
+      exit (1);
+    }
+  fprintf (stdout, "Successful parse.\n");
+  return 0;
+}
+]])
+
+AT_CHECK([bison input.y --location -d -v -o input.c])
+AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
+AT_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 $ or error 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