Merge remote-tracking branch 'origin/maint'

[bison.git] / tests / conflicts.at

diff --git a/tests/conflicts.at b/tests/conflicts.at
index cf89981b0330cc958e267d34c58448c92dac30f1..3cced5d7652d255a54f8b94cfcb6093a036f3842 100644 (file)
--- a/tests/conflicts.at
+++ b/tests/conflicts.at
@@ -1,7 +1,6 @@
 # Exercising Bison on conflicts.                         -*- Autotest -*-
 
-# Copyright (C) 2002-2005, 2007, 2009-2012 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002-2005, 2007-2012 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
@@ -50,20 +49,17 @@ AT_CLEANUP
 
 AT_SETUP([%nonassoc and eof])
 
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([input.y],
 [[
 %{
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
 
 #define YYERROR_VERBOSE 1
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[
 /* The current argument. */
 static const char *input;
 
@@ -71,8 +67,7 @@ static int
 yylex (void)
 {
   static size_t toknum;
-  if (! (toknum <= strlen (input)))
-    abort ();
+  assert (toknum <= strlen (input));
   return input[toknum++];
 }
 
@@ -93,6 +88,7 @@ main (int argc, const char *argv[])
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
 m4_pushdef([AT_NONASSOC_AND_EOF_CHECK],
 [AT_BISON_CHECK([$1[ -o input.c input.y]])
@@ -145,11 +141,11 @@ AT_CLEANUP
 
 
 
-## -------------------------------------- ##
-## %error-verbose and consistent errors.  ##
-## -------------------------------------- ##
+## ------------------------------------------- ##
+## parse.error=verbose and consistent errors.  ##
+## ------------------------------------------- ##
 
-AT_SETUP([[%error-verbose and consistent errors]])
+AT_SETUP([[parse.error=verbose and consistent errors]])
 
 m4_pushdef([AT_CONSISTENT_ERRORS_CHECK], [
 
@@ -167,11 +163,10 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y],
 }]], [[
 
 %code {]AT_SKEL_CC_IF([[
-  #include <cassert>
   #include <string>]], [[
   #include <assert.h>
   #include <stdio.h>
-  void yyerror (char const *msg);]])[
+  ]AT_YYERROR_DECLARE])[
   ]AT_YYLEX_PROTOTYPE[;
   #define USE(Var)
 }
@@ -180,7 +175,7 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y],
 
 ]$1[
 
-%error-verbose
+%define parse.error verbose
 
 %%
 
@@ -212,31 +207,11 @@ public Object getLVal ()
   *lvalp = 1;
   return *input++;
 }]])[
-
-/*----------.
-| yyerror.  |
-`----------*/]AT_SKEL_JAVA_IF([[
-
-public void yyerror (String msg)
-{
-  System.err.println (msg);
-}
-
+]AT_YYERROR_DEFINE[
+]AT_SKEL_JAVA_IF([[
 };
 
-%%]], [AT_SKEL_CC_IF([[
-
-void
-yy::parser::error (const yy::location &, std::string const &msg)
-{
-  std::cerr << msg << std::endl;
-}]], [[
-
-void
-yyerror (char const *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}]])])[
+%%]])[
 
 /*-------.
 | main.  |
@@ -395,7 +370,7 @@ error-reduce:
 ;
 
 consistent-reduction: /*empty*/ {
-  assert (yychar == ]AT_SKEL_CC_IF([[yyempty_]], [[YYEMPTY]])[);
+  assert (yychar == YYEMPTY);
   yylval = 0;
   yychar = 'b';
 } ;
@@ -419,11 +394,7 @@ AT_CONSISTENT_ERRORS_CHECK([[%glr-parser]],
                            [AT_USER_ACTION_GRAMMAR],
                            [AT_USER_ACTION_INPUT],
                            [['b']], [[none]])
-AT_CONSISTENT_ERRORS_CHECK([[%language "c++"]],
-                           [AT_USER_ACTION_GRAMMAR],
-                           [AT_USER_ACTION_INPUT],
-                           [['b']], [[none]])
-# No Java test because yychar cannot be manipulated by users.
+# No C++ or Java test because yychar cannot be manipulated by users.
 
 AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reductions consistent]],
                            [AT_USER_ACTION_GRAMMAR],
@@ -471,12 +442,12 @@ AT_CLEANUP
 # with minimal LR parser tables.
 
 AT_SETUP([[LAC: %nonassoc requires splitting canonical LR states]])
-
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
 [[%code {
   #include <stdio.h>
-  void yyerror (char const *);
-  int yylex (void);
+  ]AT_YYERROR_DECLARE[
+  ]AT_YYLEX_DECLARE[
 }
 
 %error-verbose
@@ -513,19 +484,8 @@ look:
 reduce-nonassoc: %prec 'a';
 
 %%
-
-void
-yyerror (char const *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
-int
-yylex (void)
-{
-  char const *input = "aaa";
-  return *input++;
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([aaa])[
 
 int
 main (void)
@@ -533,6 +493,7 @@ main (void)
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
 # Show canonical LR's failure.
 AT_BISON_CHECK([[-Dlr.type=canonical-lr -o input.c input.y]],
@@ -774,6 +735,62 @@ state 5
 AT_CLEANUP
 
 
+## ---------------------- ##
+## %precedence suffices.  ##
+## ---------------------- ##
+
+AT_SETUP([%precedence suffices])
+
+AT_DATA([input.y],
+[[%precedence "then"
+%precedence "else"
+%%
+stmt:
+  "if" cond "then" stmt
+| "if" cond "then" stmt "else" stmt
+| "stmt"
+;
+
+cond:
+  "exp"
+;
+]])
+
+AT_BISON_CHECK([-o input.c input.y])
+
+AT_CLEANUP
+
+
+## ------------------------------ ##
+## %precedence does not suffice.  ##
+## ------------------------------ ##
+
+AT_SETUP([%precedence does not suffice])
+
+AT_DATA([input.y],
+[[%precedence "then"
+%precedence "else"
+%%
+stmt:
+  "if" cond "then" stmt
+| "if" cond "then" stmt "else" stmt
+| "stmt"
+;
+
+cond:
+  "exp"
+| cond "then" cond
+;
+]])
+
+AT_BISON_CHECK([-o input.c input.y], 0, [],
+[[input.y: conflicts: 1 shift/reduce
+input.y:12.3-18: warning: rule useless in parser due to conflicts: cond: cond "then" cond
+]])
+
+AT_CLEANUP
+
+
 ## -------------------------------- ##
 ## Defaulted Conflicted Reduction.  ##
 ## -------------------------------- ##
@@ -1343,7 +1360,7 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0,
    13 empty_c3: .  ['c']
 
     'b'  shift, and go to state 1
- 
+
     'c'       reduce using rule 13 (empty_c3)
     $default  reduce using rule 9 (empty_a)