# 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
e: 'e' | /* Nothing. */;
]])
-AT_CHECK([bison -o input.c input.y], 0, [],
+AT_BISON_CHECK([-o input.c input.y], 0, [],
[[input.y:4.9: warning: rule useless in parser due to conflicts: e: /* empty */
]])
]])
# 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'])
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
])
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], [],
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. ##
## -------------------------------- ##
%%
]])
-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 useless in parser due to conflicts: id: '0'
]])
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
])
exp: exp OP exp | NUM;
]])
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
AT_CLEANUP
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
])
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
])
;
]])
-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
;
]])
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
AT_CLEANUP
;
]])
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
AT_CLEANUP
]])
-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 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
]])
AT_CHECK([[cat input.y >> input-keep.y]])
-AT_CHECK([[bison input-keep.y]], 0, [],
+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 */
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
13 empty_c3: . ['c']
'b' shift, and go to state 1
-
+
'c' reduce using rule 13 (empty_c3)
$default reduce using rule 9 (empty_a)
empty_c3: %prec 'c' ;
]])
-AT_CHECK([[bison --report=all -o input.c input.y]], 0, [], [ignore])
+AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore])
AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0,
[[state 0