Fix last warning from --enable-gcc-warnings.

[bison.git] / tests / conflicts.at

diff --git a/tests/conflicts.at b/tests/conflicts.at
index 2db956ee67ac1244d0607829489f0adb4bfeaa4b..28a1c82c0fababee47c0e16ad8a1f5ddc361660c 100644 (file)
--- a/tests/conflicts.at
+++ b/tests/conflicts.at
@@ -1,6 +1,6 @@
 # Exercising Bison on conflicts.                         -*- Autotest -*-
 
-# Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008 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
@@ -36,8 +36,8 @@ exp: e 'e';
 e: 'e' | /* Nothing. */;
 ]])
 
-AT_CHECK([bison -o input.c input.y], 0, [],
-[[input.y:4.9: warning: rule never reduced because of conflicts: e: /* empty */
+AT_BISON_CHECK([-o input.c input.y], 0, [],
+[[input.y:4.9: warning: rule useless in parser due to conflicts: e: /* empty */
 ]])
 
 AT_CLEANUP
@@ -94,7 +94,7 @@ main (int argc, const char *argv[])
 ]])
 
 # Specify the output files to avoid problems on different file systems.
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_COMPILE([input])
 
 AT_PARSER_CHECK([./input '0<0'])
@@ -132,7 +132,7 @@ AT_DATA([input.y],
 exp: exp OP exp | NUM;
 ]])
 
-AT_CHECK([bison -o input.c --report=all input.y], 0, [],
+AT_BISON_CHECK([-o input.c --report=all input.y], 0, [],
 [input.y: conflicts: 1 shift/reduce
 ])
 
@@ -240,7 +240,7 @@ AT_DATA([input.y],
 exp: exp OP exp | NUM;
 ]])
 
-AT_CHECK([bison -o input.c --report=all input.y])
+AT_BISON_CHECK([-o input.c --report=all input.y])
 
 # Check the contents of the report.
 AT_CHECK([cat input.output], [],
@@ -326,6 +326,62 @@ 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.  ##
 ## -------------------------------- ##
@@ -362,14 +418,14 @@ id : '0';
 %%
 ]])
 
-AT_CHECK([bison -o input.c --report=all input.y], 0, [],
+AT_BISON_CHECK([-o input.c --report=all input.y], 0, [],
 [[input.y: conflicts: 1 reduce/reduce
-input.y:4.6-8: warning: rule never reduced because of conflicts: id: '0'
+input.y:4.6-8: warning: rule useless in parser due to conflicts: id: '0'
 ]])
 
 # Check the contents of the report.
 AT_CHECK([cat input.output], [],
-[[Rules never reduced
+[[Rules useless in parser due to conflicts
 
     4 id: '0'
 
@@ -479,7 +535,7 @@ AT_DATA([input.y],
 exp: exp OP exp | NUM;
 ]])
 
-AT_CHECK([bison -o input.c input.y], 1, [],
+AT_BISON_CHECK([-o input.c input.y], 1, [],
 [input.y: conflicts: 1 shift/reduce
 input.y: expected 0 shift/reduce conflicts
 ])
@@ -499,7 +555,7 @@ AT_DATA([input.y],
 exp: exp OP exp | NUM;
 ]])
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_CLEANUP
 
 
@@ -516,7 +572,7 @@ AT_DATA([input.y],
 exp: exp OP exp | NUM;
 ]])
 
-AT_CHECK([bison -o input.c input.y], 1, [],
+AT_BISON_CHECK([-o input.c input.y], 1, [],
 [input.y: conflicts: 1 shift/reduce
 input.y: expected 2 shift/reduce conflicts
 ])
@@ -536,7 +592,7 @@ program: a 'a' | a a;
 a: 'a';
 ]])
 
-AT_CHECK([bison -o input.c input.y], 1, [],
+AT_BISON_CHECK([-o input.c input.y], 1, [],
 [input.y: conflicts: 1 reduce/reduce
 input.y: expected 0 reduce/reduce conflicts
 ])
@@ -563,7 +619,7 @@ e:   e '+' e
    ;
 ]])
 
-AT_CHECK([bison -o input.c input.y], 0, [],
+AT_BISON_CHECK([-o input.c input.y], 0, [],
 [[input.y: conflicts: 4 shift/reduce
 ]])
 AT_CLEANUP
@@ -589,7 +645,7 @@ e:   e '+' e %prec '+'
    ;
 ]])
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_CLEANUP
 
 
@@ -613,7 +669,7 @@ e:   e '+' e
    ;
 ]])
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_CLEANUP
 
 
@@ -636,7 +692,7 @@ AT_DATA([[input.y]],
 
 start: resolved_conflict 'a' reported_conflicts 'a' ;
 
-/* S/R conflict resolved as shift, so the state with item
+/* S/R conflict resolved as reduce, so the state with item
  * (resolved_conflict: 'a' . unreachable1) and all it transition successors are
  * unreachable, and the associated production is useless.  */
 resolved_conflict:
@@ -665,19 +721,19 @@ reported_conflicts:
 
 ]])
 
-AT_CHECK([[bison --report=all input.y]], 0, [],
+AT_BISON_CHECK([[--report=all input.y]], 0, [],
 [[input.y: conflicts: 1 shift/reduce, 1 reduce/reduce
-input.y:12.5-20: warning: rule never reduced because of conflicts: resolved_conflict: 'a' unreachable1
-input.y:20.5-20: warning: rule never reduced because of conflicts: unreachable1: 'a' unreachable2
-input.y:21.4: warning: rule never reduced because of conflicts: unreachable1: /* empty */
-input.y:25.13: warning: rule never reduced because of conflicts: unreachable2: /* empty */
-input.y:25.16: warning: rule never reduced because of conflicts: unreachable2: /* empty */
-input.y:31.5-7: warning: rule never reduced because of conflicts: reported_conflicts: 'a'
-input.y:32.4: warning: rule never reduced because of conflicts: reported_conflicts: /* empty */
+input.y:12.5-20: warning: rule useless in parser due to conflicts: resolved_conflict: 'a' unreachable1
+input.y:20.5-20: warning: rule useless in parser due to conflicts: unreachable1: 'a' unreachable2
+input.y:21.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */
+input.y:25.13: warning: rule useless in parser due to conflicts: unreachable2: /* empty */
+input.y:25.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */
+input.y:31.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a'
+input.y:32.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */
 ]])
 
 AT_CHECK([[cat input.output]], 0,
-[[Rules never reduced
+[[Rules useless in parser due to conflicts
 
     2 resolved_conflict: 'a' unreachable1
 
@@ -812,6 +868,19 @@ state 7
     $default  reduce using rule 1 (start)
 ]])
 
+AT_DATA([[input-keep.y]],
+[[%define lr.keep_unreachable_states
+]])
+AT_CHECK([[cat input.y >> input-keep.y]])
+
+AT_BISON_CHECK([[input-keep.y]], 0, [],
+[[input-keep.y: conflicts: 2 shift/reduce, 2 reduce/reduce
+input-keep.y:22.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */
+input-keep.y:26.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */
+input-keep.y:32.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a'
+input-keep.y:33.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */
+]])
+
 AT_CLEANUP
 
 
@@ -845,7 +914,7 @@ empty_c1: %prec 'c' ;
 empty_c2: %prec 'c' ;
 empty_c3: %prec 'd' ;
 ]])
-AT_CHECK([[bison --report=all -o input.c input.y]], 0, [], [ignore])
+AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore])
 AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0,
 [[state 0
 
@@ -865,7 +934,7 @@ 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)
 
@@ -921,7 +990,7 @@ empty_c2: %prec 'c' ;
 empty_c3: %prec 'c' ;
 ]])
 
-AT_CHECK([[bison --report=all -o input.c input.y]], 0, [], [ignore])
+AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore])
 AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0,
 [[state 0