tests: enable -Wsign-compare and fix corresponding warnings

[bison.git] / tests / regression.at

diff --git a/tests/regression.at b/tests/regression.at
index 03c4b80881808cac7794e8cd42201bfad5cd6b28..f101f2180f9205fb62a687d69536042fb65c72dd 100644 (file)
--- a/tests/regression.at
+++ b/tests/regression.at
@@ -1,6 +1,6 @@
 # Bison Regressions.                               -*- Autotest -*-
 
 # Bison Regressions.                               -*- Autotest -*-
 

-# Copyright (C) 2001-2012 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 Free Software Foundation, Inc.

 
 # 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
 
 # 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


@@ -130,7 +130,6 @@ AT_SETUP([Early token definitions without --yacc])
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%{
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%{

-#include <stdio.h>

 ]AT_YYERROR_DECLARE_EXTERN[
 ]AT_YYLEX_DECLARE_EXTERN[
 void print_my_token (void);
 ]AT_YYERROR_DECLARE_EXTERN[
 ]AT_YYLEX_DECLARE_EXTERN[
 void print_my_token (void);


@@ -141,6 +140,7 @@ void print_my_token (void);
   int val;
 };
 %{
   int val;
 };
 %{

+#include <stdio.h>

 void
 print_my_token (void)
 {
 void
 print_my_token (void)
 {


@@ -209,7 +209,7 @@ exp: '(' exp ')' | NUM ;
 AT_BISON_OPTION_POPDEFS
 
 AT_BISON_CHECK([-v -o input.c input.y], 0, [],
 AT_BISON_OPTION_POPDEFS
 
 AT_BISON_CHECK([-v -o input.c input.y], 0, [],

-[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string
+[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string [-Wother]

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP


@@ -263,11 +263,11 @@ AT_CHECK([cat input.output], [],
 
     0 $accept: expr $end
 
 
     0 $accept: expr $end
 

-    1 $@1: /* empty */
+    1 $@1: %empty

 
     2 expr: 'a' $@1 'b'
 
 
     2 expr: 'a' $@1 'b'
 

-    3 $@2: /* empty */
+    3 $@2: %empty

 
     4 expr: $@2 'c'
 
 
     4 expr: $@2 'c'
 


@@ -293,7 +293,7 @@ $@2 (9)
     on left: 3, on right: 4
 
 
     on left: 3, on right: 4
 
 

-state 0
+State 0

 
     0 $accept: . expr $end
 
 
     0 $accept: . expr $end
 


@@ -305,7 +305,7 @@ state 0
     $@2   go to state 3
 
 
     $@2   go to state 3
 
 

-state 1
+State 1

 
     2 expr: 'a' . $@1 'b'
 
 
     2 expr: 'a' . $@1 'b'
 


@@ -314,42 +314,42 @@ state 1
     $@1  go to state 4
 
 
     $@1  go to state 4
 
 

-state 2
+State 2

 
     0 $accept: expr . $end
 
     $end  shift, and go to state 5
 
 
 
     0 $accept: expr . $end
 
     $end  shift, and go to state 5
 
 

-state 3
+State 3

 
     4 expr: $@2 . 'c'
 
     'c'  shift, and go to state 6
 
 
 
     4 expr: $@2 . 'c'
 
     'c'  shift, and go to state 6
 
 

-state 4
+State 4

 
     2 expr: 'a' $@1 . 'b'
 
     'b'  shift, and go to state 7
 
 
 
     2 expr: 'a' $@1 . 'b'
 
     'b'  shift, and go to state 7
 
 

-state 5
+State 5

 
     0 $accept: expr $end .
 
     $default  accept
 
 
 
     0 $accept: expr $end .
 
     $default  accept
 
 

-state 6
+State 6

 
     4 expr: $@2 'c' .
 
     $default  reduce using rule 4 (expr)
 
 
 
     4 expr: $@2 'c' .
 
     $default  reduce using rule 4 (expr)
 
 

-state 7
+State 7

 
     2 expr: 'a' $@1 'b' .
 
 
     2 expr: 'a' $@1 'b' .
 


@@ -373,11 +373,66 @@ AT_DATA([input.y],
 %token  <operator>  LE 134  "<="
 %left  OR  "<="
 %%
 %token  <operator>  LE 134  "<="
 %left  OR  "<="
 %%

-exp: ;
+exp: %empty;

 %%
 ]])
 
 %%
 ]])
 

-AT_BISON_CHECK([-v -o input.c input.y])
+AT_BISON_CHECK([-v -Wall -o input.c input.y], 0, [],
+[[input.y:1.29-32: warning: useless precedence and associativity for "||" [-Wprecedence]
+input.y:2.29-32: warning: useless precedence and associativity for "<=" [-Wprecedence]
+]])
+
+AT_CLEANUP
+
+
+
+## ---------------- ##
+## Invalid inputs.  ##
+## ---------------- ##
+
+
+AT_SETUP([Invalid inputs])
+
+AT_DATA([input.y],
+[[%%
+?
+default: 'a' }
+%&
+%a-does-not-exist
+%-
+%{
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:2.1: error: invalid character: '?'
+input.y:3.14: error: invalid character: '}'
+input.y:4.1: error: invalid character: '%'
+input.y:4.2: error: invalid character: '&'
+input.y:5.1-17: error: invalid directive: '%a-does-not-exist'
+input.y:6.1: error: invalid character: '%'
+input.y:6.2: error: invalid character: '-'
+input.y:7.1-8.0: error: missing '%}' at end of file
+input.y:7.1-8.0: error: syntax error, unexpected %{...%}
+]])
+
+AT_CLEANUP
+
+
+AT_SETUP([Invalid inputs with {}])
+
+AT_DATA([input.y],
+[[
+%destructor
+%initial-action
+%lex-param
+%parse-param
+%printer
+%union
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:3.1-15: error: syntax error, unexpected %initial-action, expecting {...}
+]])

 
 AT_CLEANUP
 
 
 AT_CLEANUP
 


@@ -394,8 +449,6 @@ AT_BISON_OPTION_PUSHDEFS
 # Bison managed, when fed with '%token 'f' "f"' to #define 'f'!
 AT_DATA_GRAMMAR([input.y],
 [%{
 # Bison managed, when fed with '%token 'f' "f"' to #define 'f'!
 AT_DATA_GRAMMAR([input.y],
 [%{

-#include <stdlib.h>
-#include <stdio.h>

 ]AT_YYERROR_DECLARE[
 ]AT_YYLEX_DECLARE[
 %}
 ]AT_YYERROR_DECLARE[
 ]AT_YYLEX_DECLARE[
 %}


@@ -412,12 +465,7 @@ exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!";
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([{ SPECIAL }])[
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([{ SPECIAL }])[

-
-int
-main (void)
-{
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 AT_BISON_OPTION_POPDEFS
 
 ]])
 AT_BISON_OPTION_POPDEFS
 


@@ -426,8 +474,16 @@ AT_BISON_OPTION_POPDEFS
 # C-string literal.  Also notice that unnecessary escaping, such as "\?", from
 # the user specification is eliminated.
 AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],
 # C-string literal.  Also notice that unnecessary escaping, such as "\?", from
 # the user specification is eliminated.
 AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],

-[[input.y:22.8-14: warning: symbol SPECIAL redeclared
-input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string
+[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
+input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
+]])
+AT_BISON_CHECK([-fcaret -o input.c input.y], [[0]], [[]],
+[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
+ %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
+        ^^^^^^^
+input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
+ %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
+        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

 ]])
 AT_COMPILE([input])
 
 ]])
 AT_COMPILE([input])
 


@@ -486,7 +542,7 @@ AT_SETUP([Web2c Report])
 AT_KEYWORDS([report])
 
 AT_DATA([input.y],
 AT_KEYWORDS([report])
 
 AT_DATA([input.y],

-[[%token       undef_id_tok const_id_tok
+[[%token        undef_id_tok const_id_tok

 
 %start CONST_DEC_PART
 \f
 
 %start CONST_DEC_PART
 \f


@@ -496,12 +552,12 @@ CONST_DEC_PART:
         ;
 
 CONST_DEC_LIST:
         ;
 
 CONST_DEC_LIST:

-         CONST_DEC
+          CONST_DEC

         | CONST_DEC_LIST CONST_DEC
         ;
 
 CONST_DEC:
         | CONST_DEC_LIST CONST_DEC
         ;
 
 CONST_DEC:

-         { } undef_id_tok '=' const_id_tok ';'
+          { } undef_id_tok '=' const_id_tok ';'

         ;
 %%
 ]])
         ;
 %%
 ]])


@@ -517,7 +573,7 @@ AT_CHECK([cat input.output], 0,
     2 CONST_DEC_LIST: CONST_DEC
     3               | CONST_DEC_LIST CONST_DEC
 
     2 CONST_DEC_LIST: CONST_DEC
     3               | CONST_DEC_LIST CONST_DEC
 

-    4 $@1: /* empty */
+    4 $@1: %empty

 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';'
 
 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';'
 


@@ -546,7 +602,7 @@ $@1 (11)
     on left: 4, on right: 5
 
 
     on left: 4, on right: 5
 
 

-state 0
+State 0

 
     0 $accept: . CONST_DEC_PART $end
 
 
     0 $accept: . CONST_DEC_PART $end
 


@@ -558,14 +614,14 @@ state 0
     $@1             go to state 4
 
 
     $@1             go to state 4
 
 

-state 1
+State 1

 
     0 $accept: CONST_DEC_PART . $end
 
     $end  shift, and go to state 5
 
 
 
     0 $accept: CONST_DEC_PART . $end
 
     $end  shift, and go to state 5
 
 

-state 2
+State 2

 
     1 CONST_DEC_PART: CONST_DEC_LIST .
     3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC
 
     1 CONST_DEC_PART: CONST_DEC_LIST .
     3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC


@@ -577,56 +633,56 @@ state 2
     $@1        go to state 4
 
 
     $@1        go to state 4
 
 

-state 3
+State 3

 
     2 CONST_DEC_LIST: CONST_DEC .
 
     $default  reduce using rule 2 (CONST_DEC_LIST)
 
 
 
     2 CONST_DEC_LIST: CONST_DEC .
 
     $default  reduce using rule 2 (CONST_DEC_LIST)
 
 

-state 4
+State 4

 
     5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';'
 
     undef_id_tok  shift, and go to state 7
 
 
 
     5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';'
 
     undef_id_tok  shift, and go to state 7
 
 

-state 5
+State 5

 
     0 $accept: CONST_DEC_PART $end .
 
     $default  accept
 
 
 
     0 $accept: CONST_DEC_PART $end .
 
     $default  accept
 
 

-state 6
+State 6

 
     3 CONST_DEC_LIST: CONST_DEC_LIST CONST_DEC .
 
     $default  reduce using rule 3 (CONST_DEC_LIST)
 
 
 
     3 CONST_DEC_LIST: CONST_DEC_LIST CONST_DEC .
 
     $default  reduce using rule 3 (CONST_DEC_LIST)
 
 

-state 7
+State 7

 
     5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';'
 
     '='  shift, and go to state 8
 
 
 
     5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';'
 
     '='  shift, and go to state 8
 
 

-state 8
+State 8

 
     5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';'
 
     const_id_tok  shift, and go to state 9
 
 
 
     5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';'
 
     const_id_tok  shift, and go to state 9
 
 

-state 9
+State 9

 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';'
 
     ';'  shift, and go to state 10
 
 
 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';'
 
     ';'  shift, and go to state 10
 
 

-state 10
+State 10

 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' .
 
 
     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' .
 


@@ -665,7 +721,7 @@ AT_KEYWORDS([report])
 AT_DATA([input.y],
 [[%%
 statement:  struct_stat;
 AT_DATA([input.y],
 [[%%
 statement:  struct_stat;

-struct_stat:  /* empty. */ | if else;
+struct_stat:  %empty | if else;

 if: "if" "const" "then" statement;
 else: "else" statement;
 %%
 if: "if" "const" "then" statement;
 else: "else" statement;
 %%


@@ -707,15 +763,6 @@ AT_CHECK([[cat tables.c]], 0,
        2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
        5,     6
 };
        2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
        5,     6
 };

-static const yytype_uint8 yyprhs[] =
-{
-       0,     0,     3,     5,     6,     9,    14
-};
-static const yytype_int8 yyrhs[] =
-{
-       8,     0,    -1,     9,    -1,    -1,    10,    11,    -1,     3,
-       4,     5,     8,    -1,     6,     8,    -1
-};

 static const yytype_uint8 yyrline[] =
 {
        0,     2,     2,     3,     3,     4,     5
 static const yytype_uint8 yyrline[] =
 {
        0,     2,     2,     3,     3,     4,     5


@@ -729,32 +776,24 @@ static const yytype_uint16 yytoknum[] =
 {
        0,   256,   257,   258,   259,   260,   261
 };
 {
        0,   256,   257,   258,   259,   260,   261
 };

-static const yytype_uint8 yyr1[] =
-{
-       0,     7,     8,     9,     9,    10,    11
-};
-static const yytype_uint8 yyr2[] =
+static const yytype_int8 yypact[] =

 {
 {

-       0,     2,     1,     0,     2,     4,     2
+      -2,    -1,     4,    -8,     0,     2,    -8,    -2,    -8,    -2,
+      -8,    -8

 };
 static const yytype_uint8 yydefact[] =
 {
        3,     0,     0,     2,     0,     0,     1,     3,     4,     3,
        6,     5
 };
 };
 static const yytype_uint8 yydefact[] =
 {
        3,     0,     0,     2,     0,     0,     1,     3,     4,     3,
        6,     5
 };

-static const yytype_int8 yydefgoto[] =
-{
-      -1,     2,     3,     4,     8
-};
-static const yytype_int8 yypact[] =
-{
-      -2,    -1,     4,    -8,     0,     2,    -8,    -2,    -8,    -2,
-      -8,    -8
-};

 static const yytype_int8 yypgoto[] =
 {
       -8,    -7,    -8,    -8,    -8
 };
 static const yytype_int8 yypgoto[] =
 {
       -8,    -7,    -8,    -8,    -8
 };

+static const yytype_int8 yydefgoto[] =
+{
+      -1,     2,     3,     4,     8
+};

 static const yytype_uint8 yytable[] =
 {
       10,     1,    11,     5,     6,     0,     7,     9
 static const yytype_uint8 yytable[] =
 {
       10,     1,    11,     5,     6,     0,     7,     9


@@ -768,6 +807,14 @@ static const yytype_uint8 yystos[] =
        0,     3,     8,     9,    10,     4,     0,     6,    11,     5,
        8,     8
 };
        0,     3,     8,     9,    10,     4,     0,     6,    11,     5,
        8,     8
 };

+static const yytype_uint8 yyr1[] =
+{
+       0,     7,     8,     9,     9,    10,    11
+};
+static const yytype_uint8 yyr2[] =
+{
+       0,     2,     1,     0,     2,     4,     2
+};

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP


@@ -793,7 +840,6 @@ m4_define([_AT_DATA_DANCER_Y],
 }
 $1
 %token ARROW INVALID NUMBER STRING DATA
 }
 $1
 %token ARROW INVALID NUMBER STRING DATA

-%defines

 %verbose
 %error-verbose
 /* Grammar follows */
 %verbose
 %error-verbose
 /* Grammar follows */


@@ -823,7 +869,7 @@ type: DATA
    | INVALID
    ;
 
    | INVALID
    ;
 

-body: /* empty */
+body: %empty

    | body member
    ;
 
    | body member
    ;
 


@@ -837,23 +883,7 @@ member: STRING
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([":"])[
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([":"])[

-]AT_LALR1_CC_IF(
-[int
-yyparse ()
-{
-  yy::parser parser;
-#if YYDEBUG
-  parser.set_debug_level (YYDEBUG);
-#endif
-  return parser.parse ();
-}
-])[
-
-int
-main (void)
-{
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 ])# _AT_DATA_DANCER_Y
 
 ]])
 ])# _AT_DATA_DANCER_Y
 


@@ -887,21 +917,19 @@ AT_CHECK_DANCER([%skeleton "lalr1.cc"])
 # --------------------------------
 m4_define([_AT_DATA_EXPECT2_Y],
 [AT_DATA_GRAMMAR([expect2.y],
 # --------------------------------
 m4_define([_AT_DATA_EXPECT2_Y],
 [AT_DATA_GRAMMAR([expect2.y],

-[[%{
-static int yylex (]AT_LALR1_CC_IF([int *], [void]));
-AT_LALR1_CC_IF([],
-[[#include <stdio.h>
-#include <stdlib.h>
+[%{
+static int yylex (AT_LALR1_CC_IF([int *], [void]));
+AT_LALR1_CC_IF([[#include <cstdlib>]],
+[[

 ]AT_YYERROR_DECLARE])[
 %}
 $1
 ]AT_YYERROR_DECLARE])[
 %}
 $1

-%defines

 %error-verbose
 %token A 1000
 %token B
 
 %%
 %error-verbose
 %token A 1000
 %token B
 
 %%

-program: /* empty */
+program: %empty

  | program e ';'
  | program error ';';
 
  | program e ';'
  | program error ';';
 


@@ -932,12 +960,7 @@ yylex (]AT_LALR1_CC_IF([int *lval], [void])[)
   assert (toknum < sizeof tokens / sizeof *tokens);
   return tokens[toknum++];
 }
   assert (toknum < sizeof tokens / sizeof *tokens);
   return tokens[toknum++];
 }

-
-int
-main (void)
-{
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 ])# _AT_DATA_EXPECT2_Y
 
 ]])
 ])# _AT_DATA_EXPECT2_Y
 


@@ -971,22 +994,20 @@ AT_SETUP([Braced code in declaration in rules section])
 
 # Bison once mistook braced code in a declaration in the rules section to be a
 # rule action.
 
 # Bison once mistook braced code in a declaration in the rules section to be a
 # rule action.

-AT_BISON_OPTION_PUSHDEFS
+AT_BISON_OPTION_PUSHDEFS([%debug])

 AT_DATA_GRAMMAR([input.y],
 [[%{
 AT_DATA_GRAMMAR([input.y],
 [[%{

-#include <stdio.h>

 ]AT_YYERROR_DECLARE[
 ]AT_YYLEX_DECLARE[
 %}
 ]AT_YYERROR_DECLARE[
 ]AT_YYLEX_DECLARE[
 %}

-
+%debug

 %error-verbose
 %error-verbose

-

 %%
 
 start:
   {
     printf ("Bison would once convert this action to a midrule because of the"
 %%
 
 start:
   {
     printf ("Bison would once convert this action to a midrule because of the"

-           " subsequent braced code.\n");
+            " subsequent braced code.\n");

   }
   ;
 
   }
   ;
 


@@ -996,19 +1017,13 @@ start:
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE(["a"])[
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE(["a"])[

-
-int
-main (void)
-{
-  yydebug = 1;
-  return !yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 AT_BISON_OPTION_POPDEFS
 
 ]])
 AT_BISON_OPTION_POPDEFS
 

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

 AT_COMPILE([input])
 AT_COMPILE([input])

-AT_PARSER_CHECK([./input], 0,
+AT_PARSER_CHECK([./input --debug], 1,

 [[Bison would once convert this action to a midrule because of the subsequent braced code.
 ]],
 [[Starting parse
 [[Bison would once convert this action to a midrule because of the subsequent braced code.
 ]],
 [[Starting parse


@@ -1047,7 +1062,7 @@ start: 'a' "A" 'b';
 %token 'a' "A";
 ]])
 
 %token 'a' "A";
 ]])
 

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

 
 AT_CLEANUP
 
 
 AT_CLEANUP
 


@@ -1073,8 +1088,8 @@ a: 'a' ;
 ]])
 
 AT_BISON_CHECK([[--report=all input.y]])
 ]])
 
 AT_BISON_CHECK([[--report=all input.y]])

-AT_CHECK([[sed -n '/^state 1$/,/^state 2$/p' input.output]], [[0]],
-[[state 1
+AT_CHECK([[sed -n '/^State 1$/,/^State 2$/p' input.output]], [[0]],
+[[State 1

 
     2 start: 'a' . a 'a'
     3 a: . 'a'
 
     2 start: 'a' . a 'a'
     3 a: . 'a'


@@ -1087,7 +1102,7 @@ AT_CHECK([[sed -n '/^state 1$/,/^state 2$/p' input.output]], [[0]],
     a  go to state 5
 
 
     a  go to state 5
 
 

-state 2
+State 2

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP


@@ -1104,11 +1119,10 @@ AT_SETUP([[Token number in precedence declaration]])
 # we lost this in Bison 1.50.
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 # we lost this in Bison 1.50.
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],

-[[%{
-  #include <stdio.h>
+[[%code {

   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[

-%}
+}

 
 %error-verbose
 %right END 0
 
 %error-verbose
 %right END 0


@@ -1129,18 +1143,14 @@ sr_conflict:
 
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[
 
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[

-
-int
-main (void)
-{
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 AT_BISON_OPTION_POPDEFS
 
 ]])
 AT_BISON_OPTION_POPDEFS
 

-AT_BISON_CHECK([[-o input.c input.y]], [[0]],,
-[[input.y:23.5-19: warning: rule useless in parser due to conflicts: start: start
-input.y:27.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias"
+AT_BISON_CHECK([[-Wall -o input.c input.y]], [[0]],,
+[[input.y:24.5-19: warning: rule useless in parser due to conflicts [-Wother]
+input.y:28.5-19: warning: rule useless in parser due to conflicts [-Wother]
+input.y:18.7-9: warning: useless precedence and associativity for TK1 [-Wprecedence]

 ]])
 AT_COMPILE([[input]])
 AT_PARSER_CHECK([[./input]])
 ]])
 AT_COMPILE([[input]])
 AT_PARSER_CHECK([[./input]])


@@ -1158,8 +1168,9 @@ AT_CLEANUP
 
 AT_SETUP([[parse-gram.y: LALR = IELR]])
 
 
 AT_SETUP([[parse-gram.y: LALR = IELR]])
 

-# Avoid differences in synclines by telling bison that the output files
-# have the same name.
+# Avoid tests/bison's dark magic by processing a local copy of the
+# grammar.  Avoid differences in synclines by telling bison that the
+# output files have the same name.

 [cp $abs_top_srcdir/src/parse-gram.y input.y]
 AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]])
 [mv input.c lalr.c]
 [cp $abs_top_srcdir/src/parse-gram.y input.y]
 AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]])
 [mv input.c lalr.c]


@@ -1173,22 +1184,21 @@ AT_CLEANUP
 
 
 
 
 
 

-## --------------------------------------- ##
-## %error-verbose and YYSTACK_USE_ALLOCA.  ##
-## --------------------------------------- ##
+## -------------------------------------------- ##
+## parse.error=verbose and YYSTACK_USE_ALLOCA.  ##
+## -------------------------------------------- ##

 
 

-AT_SETUP([[%error-verbose and YYSTACK_USE_ALLOCA]])
+AT_SETUP([[parse.error=verbose and YYSTACK_USE_ALLOCA]])

 
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%code {
 
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%code {

-  #include <stdio.h>

   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
   #define YYSTACK_USE_ALLOCA 1
 }
 
   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
   #define YYSTACK_USE_ALLOCA 1
 }
 

-%error-verbose
+%define parse.error verbose

 
 %%
 
 
 %%
 


@@ -1221,15 +1231,11 @@ syntax_error:
 %%
 
 ]AT_YYERROR_DEFINE[
 %%
 
 ]AT_YYERROR_DEFINE[

-/* Induce two syntax error messages (which requires full error
-   recovery by shifting 3 tokens) in order to detect any loss of the
-   reallocated buffer.  */
+  /* Induce two syntax error messages (which requires full error
+     recovery by shifting 3 tokens) in order to detect any loss of the
+     reallocated buffer.  */

 ]AT_YYLEX_DEFINE(["abc"])[
 ]AT_YYLEX_DEFINE(["abc"])[

-int
-main (void)
-{
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 AT_BISON_OPTION_POPDEFS
 
 ]])
 AT_BISON_OPTION_POPDEFS
 


@@ -1244,9 +1250,9 @@ AT_CLEANUP
 
 
 
 
 
 

-## ------------------------- ##
-## %error-verbose overflow.  ##
-## ------------------------- ##
+## ------------------------------ ##
+## parse.error=verbose overflow.  ##
+## ------------------------------ ##

 
 # Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an
 # invocation of yysyntax_error has caused yymsg_alloc to grow to exactly
 
 # Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an
 # invocation of yysyntax_error has caused yymsg_alloc to grow to exactly


@@ -1256,11 +1262,11 @@ AT_CLEANUP
 # size calculation would return YYSIZE_MAXIMUM to yyparse.  Then,
 # yyparse would invoke yyerror using the old contents of yymsg.
 
 # size calculation would return YYSIZE_MAXIMUM to yyparse.  Then,
 # yyparse would invoke yyerror using the old contents of yymsg.
 

-AT_SETUP([[%error-verbose overflow]])
+AT_SETUP([[parse.error=verbose overflow]])
+

 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%code {
 AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[%code {

-  #include <stdio.h>

   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
 
   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
 


@@ -1281,7 +1287,7 @@ AT_DATA_GRAMMAR([input.y],
   #define YYMAXDEPTH 100
 }
 
   #define YYMAXDEPTH 100
 }
 

-%error-verbose
+%define parse.error verbose

 
 %%
 
 
 %%
 


@@ -1329,8 +1335,8 @@ syntax_error2:
 %%
 
 ]AT_YYERROR_DEFINE[
 %%
 
 ]AT_YYERROR_DEFINE[

-/* Induce two syntax error messages (which requires full error
-   recovery by shifting 3 tokens).  */
+  /* Induce two syntax error messages (which requires full error
+     recovery by shifting 3 tokens).  */

 ]AT_YYLEX_DEFINE(["abc"])[
 int
 main (void)
 ]AT_YYLEX_DEFINE(["abc"])[
 int
 main (void)


@@ -1370,17 +1376,16 @@ AT_SETUP([[LAC: Exploratory stack]])
 
 m4_pushdef([AT_LAC_CHECK], [
 
 
 m4_pushdef([AT_LAC_CHECK], [
 

-AT_BISON_OPTION_PUSHDEFS([$1])
+AT_BISON_OPTION_PUSHDEFS([%debug $1])

 
 AT_DATA_GRAMMAR([input.y],
 [[%code {
 
 AT_DATA_GRAMMAR([input.y],
 [[%code {

-  #include <stdio.h>

   ]AT_YYERROR_DECLARE[
   int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[);
 }
   ]AT_YYERROR_DECLARE[
   int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[);
 }

-
+%debug

 ]$1[
 ]$1[

-%error-verbose
+%define parse.error verbose

 %token 'c'
 
 %%
 %token 'c'
 
 %%


@@ -1405,21 +1410,16 @@ yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[)
   return *input++;
 }
 
   return *input++;
 }
 

-int
-main (void)
-{
-  yydebug = 1;
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 
 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
                  -Dparse.lac.memory-trace=full \
 ]])
 
 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
                  -Dparse.lac.memory-trace=full \

-                 -t -o input.c input.y]], [[0]], [],
-[[input.y: conflicts: 21 shift/reduce
+                 -o input.c input.y]], [[0]], [],
+[[input.y: warning: 21 shift/reduce conflicts [-Wconflicts-sr]

 ]])
 AT_COMPILE([[input]])
 ]])
 AT_COMPILE([[input]])

-AT_PARSER_CHECK([[./input > stdout.txt 2> stderr.txt]], [[1]])
+AT_PARSER_CHECK([[./input --debug > stdout.txt 2> stderr.txt]], [[1]])

 
 # Make sure syntax error doesn't forget that 'a' is expected.  It would
 # be forgotten without lookahead correction.
 
 # Make sure syntax error doesn't forget that 'a' is expected.  It would
 # be forgotten without lookahead correction.


@@ -1463,15 +1463,14 @@ AT_CLEANUP
 AT_SETUP([[LAC: Memory exhaustion]])
 
 m4_pushdef([AT_LAC_CHECK],
 AT_SETUP([[LAC: Memory exhaustion]])
 
 m4_pushdef([AT_LAC_CHECK],

-[AT_BISON_OPTION_PUSHDEFS
+[AT_BISON_OPTION_PUSHDEFS([%debug])

 AT_DATA_GRAMMAR([input.y],
 [[%code {
 AT_DATA_GRAMMAR([input.y],
 [[%code {

-  #include <stdio.h>

   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
   #define YYMAXDEPTH 8
 }
   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
   #define YYMAXDEPTH 8
 }

-
+%debug

 %error-verbose
 
 %%
 %error-verbose
 
 %%


@@ -1482,17 +1481,12 @@ A: /*empty*/ | 'a' ;
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE(["$1"])[
 %%
 ]AT_YYERROR_DEFINE[
 ]AT_YYLEX_DEFINE(["$1"])[

-int
-main (void)
-{
-  yydebug = 1;
-  return yyparse ();
-}
+]AT_MAIN_DEFINE[

 ]])
 
 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
 ]])
 
 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \

-                 -t -o input.c input.y]], [[0]], [],
-[[input.y: conflicts: 8 shift/reduce
+                 -o input.c input.y]], [[0]], [],
+[[input.y: warning: 8 shift/reduce conflicts [-Wconflicts-sr]

 ]])
 AT_COMPILE([[input]])
 AT_BISON_OPTION_POPDEFS
 ]])
 AT_COMPILE([[input]])
 AT_BISON_OPTION_POPDEFS


@@ -1500,7 +1494,7 @@ AT_BISON_OPTION_POPDEFS
 
 # Check for memory exhaustion during parsing.
 AT_LAC_CHECK([])
 
 # Check for memory exhaustion during parsing.
 AT_LAC_CHECK([])

-AT_PARSER_CHECK([[./input]], [[2]], [],
+AT_PARSER_CHECK([[./input --debug]], [[2]], [],

 [[Starting parse
 Entering state 0
 Reading a token: Now at end of input.
 [[Starting parse
 Entering state 0
 Reading a token: Now at end of input.


@@ -1514,7 +1508,7 @@ Stack now 0
 # Induce an immediate syntax error with an undefined token, and check
 # for memory exhaustion while building syntax error message.
 AT_LAC_CHECK([z], [[0]])
 # Induce an immediate syntax error with an undefined token, and check
 # for memory exhaustion while building syntax error message.
 AT_LAC_CHECK([z], [[0]])

-AT_PARSER_CHECK([[./input]], [[2]], [],
+AT_PARSER_CHECK([[./input --debug]], [[2]], [],

 [[Starting parse
 Entering state 0
 Reading a token: Next token is token $undefined ()
 [[Starting parse
 Entering state 0
 Reading a token: Next token is token $undefined ()


@@ -1545,27 +1539,22 @@ AT_CLEANUP
 m4_pushdef([AT_TEST],
 [AT_SETUP([[Lex and parse params: $1]])
 
 m4_pushdef([AT_TEST],
 [AT_SETUP([[Lex and parse params: $1]])
 

+## FIXME: Improve parsing of parse-param.

 AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" %parse-param { int x } %parse-param { int y }])
 
 AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" %parse-param { int x } %parse-param { int y }])
 

-## FIXME: Improve parsing of parse-param and use the generated
-## yyerror.

 AT_DATA_GRAMMAR([input.y],
 AT_DATA_GRAMMAR([input.y],

-[[%defines
-%locations
+[[%locations

 %skeleton "$1"
 %union { int ival; }
 %parse-param { int x }
 // Spaces, tabs, and new lines.
 %parse-param { @&t@
 %skeleton "$1"
 %union { int ival; }
 %parse-param { int x }
 // Spaces, tabs, and new lines.
 %parse-param { @&t@

-        int y   @&t@
+@tb@ int y@tb@ @&t@

          @&t@
  @&t@
 }
 
 %{
          @&t@
  @&t@
 }
 
 %{

-#include <stdio.h>
-#include <stdlib.h>
-

   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
 %}
   ]AT_YYERROR_DECLARE[
   ]AT_YYLEX_DECLARE[
 %}


@@ -1588,7 +1577,7 @@ yyparse (int x, int y)
 int
 main (void)
 {
 int
 main (void)
 {

-  return !!yyparse(1, 2);
+  return yyparse(1, 2);

 }
 ]])
 
 }
 ]])
 


@@ -1607,3 +1596,33 @@ AT_TEST([lalr1.cc])
 AT_TEST([glr.cc])
 
 m4_popdef([AT_TEST])
 AT_TEST([glr.cc])
 
 m4_popdef([AT_TEST])

+
+
+## ----------------------- ##
+## stdio.h is not needed.  ##
+## ----------------------- ##
+
+# At some point, by accident, yy_location_print_ was using fprintf and
+# FILE which are from stdio.h, which we do not require.
+AT_SETUP([[stdio.h is not needed]])
+
+AT_BISON_OPTION_PUSHDEFS
+
+AT_DATA_GRAMMAR([input.y],
+[[%locations
+%code
+{
+  static int yylex (void) { return 0; }
+  static void yyerror (const char* msg) { (void) msg; }
+}
+%%
+exp: {}
+%%
+]AT_MAIN_DEFINE[
+]])
+
+AT_FULL_COMPILE([input])
+
+AT_BISON_OPTION_POPDEFS
+
+AT_CLEANUP