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Fix untranslatable composition of sentences.

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Reported by Goran Uddeborg at
<http://lists.gnu.org/archive/html/bug-bison/2008-06/msg00000.html>.
* THANKS (Goran Uddeborg): Add.
* src/reduce.c (reduce_print): Report the number of nonterminals and
rules useless in the grammar in separate sentences.
* tests/reduce.at (Useless Rules): Update output.
(Reduced Automaton): Likewise.
(Underivable Rules): Likewise.
(Empty Language): Likewise.
This commit is contained in:
Joel E. Denny
2008-07-16 02:56:36 -04:00
parent 9aacab9ae9
commit bcf07cb707
4 changed files with 38 additions and 22 deletions
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12
tests/reduce.at
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@@ -142,7 +142,8 @@ useless9: '9';
]])
AT_BISON_CHECK([[input.y]], 0, [],
[[input.y: warning: 9 nonterminals and 9 rules useless in grammar
[[input.y: warning: 9 nonterminals useless in grammar
input.y: warning: 9 rules useless in grammar
input.y:6.1-8: warning: nonterminal useless in grammar: useless1
input.y:7.1-8: warning: nonterminal useless in grammar: useless2
input.y:8.1-8: warning: nonterminal useless in grammar: useless3
@@ -237,7 +238,8 @@ non_productive: non_productive useless_token
]])
AT_BISON_CHECK([[not-reduced.y]], 0, [],
[[not-reduced.y: warning: 2 nonterminals and 3 rules useless in grammar
[[not-reduced.y: warning: 2 nonterminals useless in grammar
not-reduced.y: warning: 3 rules useless in grammar
not-reduced.y:14.1-13: warning: nonterminal useless in grammar: not_reachable
not-reduced.y:11.6-19: warning: nonterminal useless in grammar: non_productive
not-reduced.y:11.6-57: warning: rule useless in grammar: exp: non_productive
@@ -311,7 +313,8 @@ indirection: underivable;
]])
AT_BISON_CHECK([[input.y]], 0, [],
[[input.y: warning: 2 nonterminals and 3 rules useless in grammar
[[input.y: warning: 2 nonterminals useless in grammar
input.y: warning: 3 rules useless in grammar
input.y:5.15-25: warning: nonterminal useless in grammar: underivable
input.y:6.14-24: warning: nonterminal useless in grammar: indirection
input.y:5.15-25: warning: rule useless in grammar: exp: underivable
@@ -346,7 +349,8 @@ exp: exp;
]])
AT_BISON_CHECK([[input.y]], 1, [],
[[input.y: warning: 2 nonterminals and 2 rules useless in grammar
[[input.y: warning: 2 nonterminals useless in grammar
input.y: warning: 2 rules useless in grammar
input.y:3.1-3: fatal error: start symbol exp does not derive any sentence
]])