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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
Download Patch File Download Diff File Expand all files Collapse all files

13
ChangeLog
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@@ -1,3 +1,16 @@
2008-07-16 Joel E. Denny <jdenny@ces.clemson.edu>
Fix untranslatable composition of sentences. 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.
2008-07-15 Joel E. Denny <jdenny@ces.clemson.edu>
Fix some .gitignore and .cvsignore problems.

1
THANKS
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@@ -33,6 +33,7 @@ Fabrice Bauzac noon@cote-dazur.com
Florian Krohm florian@edamail.fishkill.ibm.com
Frank Heckenbach frank@g-n-u.de
Frans Englich frans.englich@telia.com
Goran Uddeborg goeran@uddeborg.se
Guido Trentalancia trentalg@aston.ac.uk
H. Merijn Brand h.m.brand@hccnet.nl
Hans Aberg haberg@matematik.su.se

34
src/reduce.c
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@@ -382,26 +382,24 @@ reduce_output (FILE *out)
static void
reduce_print (void)
{
fprintf (stderr, "%s: %s: ", grammar_file, _("warning"));
if (nuseless_nonterminals > 0)
fprintf (stderr, ngettext ("%d nonterminal",
"%d nonterminals",
nuseless_nonterminals),
nuseless_nonterminals);
if (nuseless_nonterminals > 0 && nuseless_productions > 0)
fprintf (stderr, _(" and "));
{
fprintf (stderr, "%s: %s: ", grammar_file, _("warning"));
fprintf (stderr, ngettext ("%d nonterminal useless in grammar",
"%d nonterminals useless in grammar",
nuseless_nonterminals),
nuseless_nonterminals);
fprintf (stderr, "\n");
}
if (nuseless_productions > 0)
fprintf (stderr, ngettext ("%d rule",
"%d rules",
nuseless_productions),
nuseless_productions);
if (nuseless_nonterminals > 0 || nuseless_productions > 0)
fprintf (stderr, _(" useless in grammar"));
fprintf (stderr, "\n");
{
fprintf (stderr, "%s: %s: ", grammar_file, _("warning"));
fprintf (stderr, ngettext ("%d rule useless in grammar",
"%d rules useless in grammar",
nuseless_productions),
nuseless_productions);
fprintf (stderr, "\n");
}
}
void

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
]])