bench: More use of the verbosity level.

[bison.git] / tests / input.at

diff --git a/tests/input.at b/tests/input.at
index 8c952aa9d900d63fa20dc4e0127cf6b2c21f91dc..8bf61faa45af629017393911b05c68544474f225 100644 (file)
--- a/tests/input.at
+++ b/tests/input.at
@@ -1,106 +1,942 @@
-# Checking the output filenames.                    -*- Autotest -*-
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Checking the Bison scanner.                    -*- Autotest -*-
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
+# Inc.

 
 

-# This program is free software; you can redistribute it and/or modify
+# This program is free software: you can redistribute it and/or modify

 # it under the terms of the GNU General Public License as published by
 # it under the terms of the GNU General Public License as published by

-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#

 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.

-
+#

 # You should have received a copy of the GNU General Public License
 # You should have received a copy of the GNU General Public License

-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.

 
 AT_BANNER([[Input Processing.]])
 
 # Mostly test that we are robust to mistakes.
 
 
 
 AT_BANNER([[Input Processing.]])
 
 # Mostly test that we are robust to mistakes.
 
 

+## ------------ ##
+## Invalid $n.  ##
+## ------------ ##
+
+AT_SETUP([Invalid $n and @n])
+
+AT_DATA([input.y],
+[[%%
+exp: { $$ = $1 ; };
+exp: { @$ = @1 ; };
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:2.13-14: integer out of range: `$1'
+input.y:3.13-14: integer out of range: `@1'
+]])
+
+AT_CLEANUP
+
+
+## -------------- ##
+## Type Clashes.  ##
+## -------------- ##
+
+AT_SETUP([Type Clashes])
+
+AT_DATA([input.y],
+[[%union { int bar; }
+%token foo
+%type <bar> exp
+%%
+exp: foo { $$; } foo { $2; } foo
+   | foo
+   | /* Empty. */
+   ;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
+input.y:5.24-25: $2 of `exp' has no declared type
+input.y:5.6-32: warning: type clash on default action: <bar> != <>
+input.y:6.6-8: warning: type clash on default action: <bar> != <>
+input.y:7.5: warning: empty rule for typed nonterminal, and no action
+]])
+
+AT_CLEANUP
+
+
+# _AT_UNUSED_VALUES_DECLARATIONS()
+# --------------------------------------------
+# Generate the token, type, and destructor
+# declarations for the unused values tests.
+
+m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
+[[[%token <integer> INT;
+%type <integer> a b c d e f g h i j k l;
+%destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
+
+
+# AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
+# ------------------------------------------------------------------
+# Generate a grammar to test unused values,
+# compile it, run it.  If DECLARATIONS_AFTER
+# is set, then the token, type, and destructor
+# declarations are generated after the rules
+# rather than before.  If CHECK_MIDRULE_VALUES
+# is set, then --warnings=midrule-values is
+# set.
+
+m4_define([AT_CHECK_UNUSED_VALUES],
+[AT_DATA([input.y],
+m4_ifval($1, [
+
+
+], [_AT_UNUSED_VALUES_DECLARATIONS
+])[[%%
+start:
+  'a' a { $]2[ } | 'b' b { $]2[ } | 'c' c { $]2[ } | 'd' d { $]2[ } | 'e' e { $]2[ }
+| 'f' f { $]2[ } | 'g' g { $]2[ } | 'h' h { $]2[ } | 'i' i { $]2[ } | 'j' j { $]2[ }
+| 'k' k { $]2[ } | 'l' l { $]2[ }
+;
+
+a: INT | INT { } INT { } INT { };
+b: INT | /* empty */;
+c: INT | INT { $]1[ } INT { $<integer>2 } INT { $<integer>4 };
+d: INT | INT { } INT { $]1[ } INT { $<integer>2 };
+e: INT | INT { } INT {  } INT { $]1[ };
+f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
+g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
+h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
+i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
+j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
+k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
+l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
+_AT_UNUSED_VALUES_DECLARATIONS])
+)
+
+AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
+[[input.y:11.10-32: warning: unset value: $]$[
+input.y:11.10-32: warning: unused value: $]1[
+input.y:11.10-32: warning: unused value: $]3[
+input.y:11.10-32: warning: unused value: $]5[
+input.y:12.9: warning: empty rule for typed nonterminal, and no action
+]]m4_ifval($2, [[[input.y:13.14-19: warning: unset value: $$
+input.y:13.25-39: warning: unset value: $$
+]]])[[input.y:13.10-59: warning: unset value: $]$[
+input.y:13.10-59: warning: unused value: $]3[
+input.y:13.10-59: warning: unused value: $]5[
+]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
+]]])[[input.y:14.10-47: warning: unset value: $]$[
+input.y:14.10-47: warning: unused value: $]3[
+input.y:14.10-47: warning: unused value: $]5[
+input.y:15.10-36: warning: unset value: $]$[
+input.y:15.10-36: warning: unused value: $]3[
+input.y:15.10-36: warning: unused value: $]5[
+input.y:17.10-58: warning: unset value: $]$[
+input.y:17.10-58: warning: unused value: $]1[
+]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
+]]])[[input.y:17.10-58: warning: unused value: $]3[
+]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
+]]])[[input.y:17.10-58: warning: unused value: $]5[
+input.y:18.10-72: warning: unset value: $]$[
+input.y:18.10-72: warning: unused value: $]1[
+input.y:18.10-72: warning: unused value: $]3[
+]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
+]]])[[input.y:18.10-72: warning: unused value: $]5[
+]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
+]]])[[input.y:21.10-68: warning: unset value: $]$[
+input.y:21.10-68: warning: unused value: $]1[
+input.y:21.10-68: warning: unused value: $]2[
+]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
+]]]))])
+
+
+## --------------- ##
+## Unused values.  ##
+## --------------- ##
+
+AT_SETUP([Unused values])
+AT_CHECK_UNUSED_VALUES
+AT_CHECK_UNUSED_VALUES(, [1])
+AT_CLEANUP
+
+
+## ------------------------------------------ ##
+## Unused values before symbol declarations.  ##
+## ------------------------------------------ ##
+
+AT_SETUP([Unused values before symbol declarations])
+AT_CHECK_UNUSED_VALUES([1])
+AT_CHECK_UNUSED_VALUES([1], [1])
+AT_CLEANUP
+
+
+## --------------------------------------------- ##
+## Default %printer and %destructor redeclared.  ##
+## --------------------------------------------- ##
+
+AT_SETUP([Default %printer and %destructor redeclared])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <*> <*>
+%printer { destroy ($$); } <*> <*>
+
+%destructor { destroy ($$); } <*>
+%printer { destroy ($$); } <*>
+
+%destructor { destroy ($$); } <> <>
+%printer { destroy ($$); } <> <>
+
+%destructor { destroy ($$); } <>
+%printer { destroy ($$); } <>
+
+%%
+
+start: ;
+
+%destructor { destroy ($$); } <*>;
+%printer { destroy ($$); } <*>;
+
+%destructor { destroy ($$); } <>;
+%printer { destroy ($$); } <>;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.13-29: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:2.10-26: redeclaration for default tagged %printer
+input.y:2.10-26: previous declaration
+input.y:4.13-29: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:5.10-26: redeclaration for default tagged %printer
+input.y:2.10-26: previous declaration
+input.y:7.13-29: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:8.10-26: redeclaration for default tagless %printer
+input.y:8.10-26: previous declaration
+input.y:10.13-29: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:11.10-26: redeclaration for default tagless %printer
+input.y:8.10-26: previous declaration
+input.y:17.13-29: redeclaration for default tagged %destructor
+input.y:4.13-29: previous declaration
+input.y:18.10-26: redeclaration for default tagged %printer
+input.y:5.10-26: previous declaration
+input.y:20.13-29: redeclaration for default tagless %destructor
+input.y:10.13-29: previous declaration
+input.y:21.10-26: redeclaration for default tagless %printer
+input.y:11.10-26: previous declaration
+]])
+
+AT_CLEANUP
+
+
+## ---------------------------------------------- ##
+## Per-type %printer and %destructor redeclared.  ##
+## ---------------------------------------------- ##
+
+AT_SETUP([Per-type %printer and %destructor redeclared])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <field1> <field2>
+%printer { destroy ($$); } <field1> <field2>
+
+%destructor { destroy ($$); } <field1> <field1>
+%printer { destroy ($$); } <field2> <field2>
+
+%%
+
+start: ;
+
+%destructor { destroy ($$); } <field2> <field1>;
+%printer { destroy ($$); } <field2> <field1>;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:4.13-29: %destructor redeclaration for <field1>
+input.y:1.13-29: previous declaration
+input.y:4.13-29: %destructor redeclaration for <field1>
+input.y:4.13-29: previous declaration
+input.y:5.10-26: %printer redeclaration for <field2>
+input.y:2.10-26: previous declaration
+input.y:5.10-26: %printer redeclaration for <field2>
+input.y:5.10-26: previous declaration
+input.y:11.13-29: %destructor redeclaration for <field1>
+input.y:4.13-29: previous declaration
+input.y:11.13-29: %destructor redeclaration for <field2>
+input.y:1.13-29: previous declaration
+input.y:12.10-26: %printer redeclaration for <field1>
+input.y:2.10-26: previous declaration
+input.y:12.10-26: %printer redeclaration for <field2>
+input.y:5.10-26: previous declaration
+]])
+
+AT_CLEANUP
+
+
+## ---------------------------------------- ##
+## Unused values with default %destructor.  ##
+## ---------------------------------------- ##
+
+AT_SETUP([Unused values with default %destructor])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <>
+%type <tag> tagged
+
+%%
+
+start: end end tagged tagged { $<tag>1; $3; } ;
+end: { } ;
+tagged: { } ;
+]])
+
+AT_BISON_CHECK([input.y], [0], [],
+[[input.y:6.8-45: warning: unset value: $$
+input.y:6.8-45: warning: unused value: $2
+input.y:7.6-8: warning: unset value: $$
+]])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <*>
+%type <tag> tagged
+
+%%
+
+start: end end tagged tagged { $<tag>1; $3; } ;
+end: { } ;
+tagged: { } ;
+]])
+
+AT_BISON_CHECK([input.y], [0], [],
+[[input.y:6.8-45: warning: unused value: $4
+input.y:8.9-11: warning: unset value: $$
+]])
+
+AT_CLEANUP
+
+
+## ----------------------------------------- ##
+## Unused values with per-type %destructor.  ##
+## ----------------------------------------- ##
+
+AT_SETUP([Unused values with per-type %destructor])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <field1>
+%type <field1> start end
+
+%%
+
+start: end end { $1; } ;
+end: { }  ;
+]])
+
+AT_BISON_CHECK([input.y], [0], [],
+[[input.y:6.8-22: warning: unset value: $$
+input.y:6.8-22: warning: unused value: $2
+input.y:7.6-8: warning: unset value: $$
+]])
+
+AT_CLEANUP
+
+
+## ---------------------- ##
+## Incompatible Aliases.  ##
+## ---------------------- ##
+
+AT_SETUP([Incompatible Aliases])
+
+AT_DATA([input.y],
+[[%token foo "foo"
+
+%type <bar>       foo
+%printer {bar}    foo
+%destructor {bar} foo
+%left             foo
+
+%type <baz>       "foo"
+%printer {baz}    "foo"
+%destructor {baz} "foo"
+%left             "foo"
+
+%%
+exp: foo;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:8.7-11: %type redeclaration for foo
+input.y:3.7-11: previous declaration
+input.y:10.13-17: %destructor redeclaration for foo
+input.y:5.13-17: previous declaration
+input.y:9.10-14: %printer redeclaration for foo
+input.y:4.10-14: previous declaration
+input.y:11.1-5: %left redeclaration for foo
+input.y:6.1-5: previous declaration
+]])
+
+AT_CLEANUP
+
+
+

 ## ----------------------- ##
 ## Torturing the Scanner.  ##
 ## ----------------------- ##
 
 ## ----------------------- ##
 ## Torturing the Scanner.  ##
 ## ----------------------- ##
 

+# Be sure to compile and run, so that the C compiler checks what
+# we do.
+

 AT_SETUP([Torturing the Scanner])
 
 AT_SETUP([Torturing the Scanner])
 

+
+AT_DATA([input.y], [])
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.1: syntax error, unexpected end of file
+]])
+
+

 AT_DATA([input.y],
 AT_DATA([input.y],

+[{}
+])
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.1-2: syntax error, unexpected {...}
+]])
+
+
+AT_DATA_GRAMMAR([input.y],

 [[%{
 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 [[%{
 /* This is seen in GCC: a %{ and %} in middle of a comment. */

-const char *foo = "So %{ and %} can be here.";
+const char *foo = "So %{ and %} can be here too.";
+
+#if 0
+/* These examples test Bison while not stressing C compilers too much.
+   Many C compilers mishandle backslash-newlines, so this part of the
+   test is inside "#if 0".  The comment and string are written so that
+   the "#endif" will be seen regardless of the C compiler bugs that we
+   know about, namely:
+
+     HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
+     comment.
+
+     The Apple Darwin compiler (as of late 2002) mishandles
+     \\[newline]' within a character constant.
+
+   */
+
+/\
+* A comment with backslash-newlines in it. %} *\
+\
+/
+/* { Close the above comment, if the C compiler mishandled it.  */
+
+char str[] = "\\
+" A string with backslash-newlines in it %{ %} \\
+\
+"";
+
+char apostrophe = '\'';
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>

 %}
 /* %{ and %} can be here too. */
 
 %}
 /* %{ and %} can be here too. */
 

+%{
+/* Exercise pre-prologue dependency to %union.  */
+typedef int value;
+%}
+
+/* Exercise M4 quoting: '@:>@@:>@', 0.  */
+
+/* Also exercise %union. */
+%union
+{
+  value ival; /* A comment to exercise an old bug. */
+};
+
+
+/* Exercise post-prologue dependency to %union.  */
+%{
+static YYSTYPE value_as_yystype (value val);
+
+/* Exercise quotes in declarations.  */
+char quote[] = "@:>@@:>@,";
+%}
+
+%{
+static void yyerror (const char *s);
+static int yylex (void);
+%}
+
+%type <ival> '@<:@'
+
+/* Exercise quotes in strings.  */
+%token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
+
+%%
+/* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
+exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
+  {
+    /* Exercise quotes in braces.  */
+    char tmp[] = "@<:@%c@:>@,\n";
+    printf (tmp, $1);
+  }
+;
+
+two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
+oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
+output.or.oline.opt: ;|oline;;|output;;;
+output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
+%%
+/* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
+
+static YYSTYPE
+value_as_yystype (value val)
+{
+  YYSTYPE res;
+  res.ival = val;
+  return res;
+}
+
+static int
+yylex (void)
+{
+  static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
+#output "; /* "
+  */
+  static size_t toknum;
+  if (! (toknum < sizeof input))
+    abort ();
+  yylval = value_as_yystype (input[toknum]);
+  return input[toknum++];
+}
+
+static void
+yyerror (const char *msg)
+{
+  fprintf (stderr, "%s\n", msg);
+}
+]])
+
+# Pacify Emacs'font-lock-mode: "
+
+AT_DATA([main.c],
+[[typedef int value;
+#include "input.h"
+
+int yyparse (void);
+
+int
+main (void)
+{
+  return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([-d -v -o input.c input.y])
+AT_COMPILE([input.o], [-c input.c])
+AT_COMPILE([main.o], [-c main.c])
+AT_COMPILE([input], [input.o main.o])
+AT_PARSER_CHECK([./input], 0,
+[[[@<:@],
+]])
+
+AT_CLEANUP
+
+
+## ---------------------- ##
+## Typed symbol aliases.  ##
+## ---------------------- ##
+
+AT_SETUP([Typed symbol aliases])
+
+# Bison 2.0 broke typed symbol aliases - ensure they work.
+
+AT_DATA_GRAMMAR([input.y],
+[[%union
+{
+  int val;
+};
+%token <val> MY_TOKEN "MY TOKEN"
+%type <val> exp
+%%
+exp: "MY TOKEN";

 %%
 %%

-exp: 'a';

 ]])
 
 ]])
 

-AT_CHECK([bison input.y])
+AT_BISON_CHECK([-o input.c input.y])

 
 AT_CLEANUP
 
 
 
 AT_CLEANUP
 
 

+## --------- ##
+## Require.  ##
+## --------- ##

 
 

+m4_define([AT_CHECK_REQUIRE],
+[AT_SETUP([Require $1])
+AT_DATA_GRAMMAR([input.y],
+[[%require "$1";
+%%
+empty_file:;
+]])
+AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
+AT_CLEANUP
+])

 
 

-## ------------ ##
-## Invalid $n.  ##
-## ------------ ##
+AT_CHECK_REQUIRE(1.0, 0)
+AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
+## FIXME: Some day augment this version number.
+AT_CHECK_REQUIRE(100.0, 63)

 
 

-AT_SETUP([Invalid $n])
+
+## ------------------------------------- ##
+## String aliases for character tokens.  ##
+## ------------------------------------- ##
+
+AT_SETUP([String aliases for character tokens])
+
+# Bison once thought a character token and its alias were different symbols
+# with the same user token number.
+
+AT_DATA_GRAMMAR([input.y],
+[[%token 'a' "a"
+%%
+start: 'a';
+%%
+]])
+
+AT_BISON_CHECK([-o input.c input.y])
+
+AT_CLEANUP
+
+
+## --------------------- ##
+## Unclosed constructs.  ##
+## --------------------- ##
+
+AT_SETUP([Unclosed constructs])
+
+# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
+# they were prepended to whatever it STRING_GROW'ed next.  It also threw them
+# away rather than returning them to the parser.  The effect was confusing
+# subsequent error messages.

 
 AT_DATA([input.y],
 
 AT_DATA([input.y],

-[[%%
-exp: { $$ = $1 ; };
+[[%token A "a
+%token B "b"
+%token AB "ab" // Used to complain that "ab" was already used.
+%token C '1
+%token TWO "2"
+%token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
+
+%%
+
+start: ;
+
+// Used to report a syntax error because it didn't see any kind of symbol
+// identifier.
+%type <f> 'a
+;
+%type <f> "a
+;
+// Used to report a syntax error because it didn't see braced code.
+%destructor { free ($$)

 ]])
 
 ]])
 

-AT_CHECK([bison input.y], [1], [],
-[[input.y:2.6-14: invalid value: $1
+AT_BISON_CHECK([-o input.c input.y], 1, [],
+[[input.y:1.10-2.0: missing `"' at end of line
+input.y:4.10-5.0: missing `'' at end of line
+input.y:14.11-15.0: missing `'' at end of line
+input.y:16.11-17.0: missing `"' at end of line
+input.y:19.13-20.0: missing `}' at end of file
+input.y:20.1: syntax error, unexpected end of file

 ]])
 
 AT_CLEANUP
 
 
 ]])
 
 AT_CLEANUP
 
 

-## ------------ ##
-## Invalid @n.  ##
-## ------------ ##
+## ------------------------- ##
+## %start after first rule.  ##
+## ------------------------- ##

 
 

-AT_SETUP([Invalid @n])
+AT_SETUP([%start after first rule])
+
+# Bison once complained that a %start after the first rule was a redeclaration
+# of the start symbol.

 
 AT_DATA([input.y],
 [[%%
 
 AT_DATA([input.y],
 [[%%

-exp: { @$ = @1 ; };
+false_start: ;
+start: false_start ;
+%start start;
+]])
+
+AT_BISON_CHECK([-o input.c input.y])
+
+AT_CLEANUP
+
+
+## --------------------- ##
+## %prec takes a token.  ##
+## --------------------- ##
+
+AT_SETUP([%prec takes a token])
+
+# Bison once allowed %prec sym where sym was a nonterminal.
+
+AT_DATA([input.y],
+[[%%
+start: PREC %prec PREC ;
+PREC: ;

 ]])
 
 ]])
 

-AT_CHECK([bison input.y], [1], [],
-[[input.y:2: invalid value: @1
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:3.1-4: rule given for PREC, which is a token

 ]])
 
 AT_CLEANUP
 
 
 ]])
 
 AT_CLEANUP
 
 

-## -------------- ##
-## Type clashes.  ##
-## -------------- ##
+## -------------------------------- ##
+## Reject unused %code qualifiers.  ##
+## -------------------------------- ##
+
+AT_SETUP([Reject unused %code qualifiers])
+
+AT_DATA([input-c.y],
+[[%code q {}
+%code bad {}
+%code bad {}
+%code format {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[input-c.y]], [0], [],
+[[input-c.y:1.7: warning: %code qualifier `q' is not used
+input-c.y:2.7-9: warning: %code qualifier `bad' is not used
+input-c.y:3.7-9: warning: %code qualifier `bad' is not used
+input-c.y:4.7-12: warning: %code qualifier `format' is not used
+]])
+
+AT_DATA([input-c-glr.y],
+[[%code q {}
+%code bad {}
+ %code bad {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[input-c-glr.y]], [0], [],
+[[input-c-glr.y:1.7: warning: %code qualifier `q' is not used
+input-c-glr.y:2.7-9: warning: %code qualifier `bad' is not used
+input-c-glr.y:3.8-10: warning: %code qualifier `bad' is not used
+]])
+
+AT_DATA([input-c++.y],
+[[%code q {}
+%code bad {}
+ %code q {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[input-c++.y]], [0], [],
+[[input-c++.y:1.7: warning: %code qualifier `q' is not used
+input-c++.y:2.7-9: warning: %code qualifier `bad' is not used
+input-c++.y:3.8: warning: %code qualifier `q' is not used
+]])
+
+AT_DATA([input-c++-glr.y],
+[[%code bad {}
+%code q {}
+%code q {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[input-c++-glr.y]], [0], [],
+[[input-c++-glr.y:1.7-9: warning: %code qualifier `bad' is not used
+input-c++-glr.y:2.7: warning: %code qualifier `q' is not used
+input-c++-glr.y:3.7: warning: %code qualifier `q' is not used
+]])

 
 

-AT_SETUP([Type clashes])
+AT_DATA([special-char-@@.y],
+[[%code bad {}
+%code q {}
+%code q {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[special-char-@@.y]], [0], [],
+[[special-char-@@.y:1.7-9: warning: %code qualifier `bad' is not used
+special-char-@@.y:2.7: warning: %code qualifier `q' is not used
+special-char-@@.y:3.7: warning: %code qualifier `q' is not used
+]])
+
+AT_DATA([special-char-@:>@.y],
+[[%code bad {}
+%code q {}
+%code q {}
+%%
+start: ;
+]])
+AT_BISON_CHECK([[special-char-@:>@.y]], [0], [],
+[[special-char-@:>@.y:1.7-9: warning: %code qualifier `bad' is not used
+special-char-@:>@.y:2.7: warning: %code qualifier `q' is not used
+special-char-@:>@.y:3.7: warning: %code qualifier `q' is not used
+]])
+
+AT_CLEANUP
+
+
+## ---------------- ##
+## %define errors.  ##
+## ---------------- ##
+
+AT_SETUP([%define errors])

 
 AT_DATA([input.y],
 
 AT_DATA([input.y],

-[[%token foo
-%type <bar> exp
+[[%define var "value1"
+%define var "value1"
+ %define var "value2"
+%define special1 "@:>@"
+%define special2 "@<:@"

 %%
 %%

-exp: foo {} foo
-   | foo
-   | /* Empty. */
-   ;
+start: ;
+]])
+
+AT_BISON_CHECK([[input.y]], [0], [],
+[[input.y:2.9-11: warning: %define variable `var' redefined
+input.y:1.9-11: warning: previous definition
+input.y:3.10-12: warning: %define variable `var' redefined
+input.y:2.9-11: warning: previous definition
+input.y:1.9-11: warning: %define variable `var' is not used
+input.y:2.9-11: warning: %define variable `var' is not used
+input.y:3.10-12: warning: %define variable `var' is not used
+input.y:4.9-16: warning: %define variable `special1' is not used
+input.y:5.9-16: warning: %define variable `special2' is not used
+]])
+
+AT_CLEANUP
+
+## --------------------------- ##
+## %define Boolean variables.  ##
+## --------------------------- ##
+
+AT_SETUP([[%define Boolean variables]])
+
+AT_DATA([Input.y],
+[[%language "Java"
+%define public "maybe"
+%define parser_class_name "Input"
+%%
+start: ;
+]])
+
+AT_BISON_CHECK([[Input.y]], [1], [],
+[[Input.y:2.9-14: invalid value for %define Boolean variable `public'
+]])
+
+AT_CLEANUP
+
+## ------------------------ ##
+## %define enum variables.  ##
+## ------------------------ ##
+
+AT_SETUP([[%define enum variables]])
+
+AT_DATA([[input.y]],
+[[%define api.push_pull "neither"
+%%
+start: ;

 ]])
 
 ]])
 

-AT_CHECK([bison input.y], [1], [],
-[[input.y:5: type clash (`bar' `') on default action
-input.y:6: type clash (`bar' `') on default action
-input.y:7: empty rule for typed nonterminal, and no action
+AT_BISON_CHECK([[input.y]], [1], [],
+[[input.y:1.9-21: invalid value for %define variable `api.push_pull': `neither'

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP

+
+## ------------------------- ##
+## Unused %define api.pure.  ##
+## ------------------------- ##
+
+AT_SETUP([[Unused %define api.pure]])
+
+# AT_CHECK_API_PURE(DECLS, VALUE)
+# -------------------------------
+# Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
+# are specified.
+m4_define([AT_CHECK_API_PURE],
+[
+AT_DATA([[input.y]],
+[[%define api.pure ]$2[
+]$1[
+%%
+start: ;
+]])
+
+AT_BISON_CHECK([[input.y]], [0], [],
+[[input.y:1.9-16: warning: %define variable `api.pure' is not used
+]])
+])
+
+AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
+AT_CHECK_API_PURE([[%language "c++" %defines]], [["false"]])
+AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
+AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [["false"]])
+AT_CHECK_API_PURE([[%language "java"]], [["true"]])
+AT_CHECK_API_PURE([[%language "java"]], [["false"]])
+
+AT_CLEANUP
+
+## -------------------------------- ##
+## C++ namespace reference errors.  ##
+## -------------------------------- ##
+
+AT_SETUP([[C++ namespace reference errors]])
+
+# AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
+# -------------------------------------------------------------
+# Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
+m4_define([AT_CHECK_NAMESPACE_ERROR],
+[
+AT_DATA([[input.y]],
+[[%language "C++"
+%defines
+%define namespace "]$1["
+%%
+start: ;
+]])
+
+AT_BISON_CHECK([[input.y]], [1], [],
+[m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
+[[input.y:3.9-17: ]b4_arg[
+]])])
+])
+
+AT_CHECK_NAMESPACE_ERROR([[]],
+                         [[namespace reference is empty]])
+AT_CHECK_NAMESPACE_ERROR([[                            ]],
+                         [[namespace reference is empty]])
+AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
+                         [[namespace reference has consecutive "::"]])
+AT_CHECK_NAMESPACE_ERROR([[foo::       ::bar]],
+                         [[namespace reference has consecutive "::"]])
+AT_CHECK_NAMESPACE_ERROR([[::::bar]],
+                         [[namespace reference has consecutive "::"]])
+AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
+                         [[namespace reference has consecutive "::"]])
+AT_CHECK_NAMESPACE_ERROR([[foo::bar::  ::]],
+                         [[namespace reference has consecutive "::"]],
+                         [[namespace reference has a trailing "::"]])
+AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
+                         [[namespace reference has a trailing "::"]])
+AT_CHECK_NAMESPACE_ERROR([[foo::bar::  ]],
+                         [[namespace reference has a trailing "::"]])
+AT_CHECK_NAMESPACE_ERROR([[::]],
+                         [[namespace reference has a trailing "::"]])
+
+AT_CLEANUP