Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-12 13:53:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Warn about unset midrule $$ if the corresponding $n is used.

Browse Source 
* src/reader.c (symbol_should_be_used): Check midrule parent rule for
$n usage.
(packgram): Before invoking grammar_rule_check on any rule, make sure
all actions have already been scanned in order to set `used' flags.
Otherwise, checking that a midrule's $$ is set will not always work
properly because the midrule check must forward-reference the midrule's
parent rule.
* tests/input.at (AT_CHECK_UNUSED_VALUES): Extend to check the new
warning.
This commit is contained in:
Joel E. Denny
2006-10-21 02:31:50 +00:00
parent a501eca911
commit 519d000408
3 changed files with 43 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
tests/input.at
View File

@@ -103,8 +103,8 @@ start:
a: INT | INT { } INT { } INT { };
b: INT | /* empty */;
c: INT | INT { $]1[ } INT { } INT { };
d: INT | INT { } INT { $]1[ } INT { };
c: INT | INT { $]1[ } INT { $<integer>2 } INT { $<integer>4 };
d: INT | INT { } INT { $]1[ } INT { $<integer>2 };
e: INT | INT { } INT { } INT { $]1[ };
f: INT | INT { } INT { } INT { $]$[ = $]1[ + $]3[ + $]5[; };
g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
@@ -122,12 +122,15 @@ input.y:11.10-32: warning: unused value: $]1[
input.y:11.10-32: warning: unused value: $]3[
input.y:11.10-32: warning: unused value: $]5[
input.y:12.9: warning: empty rule for typed nonterminal, and no action
input.y:13.10-35: warning: unset value: $]$[
input.y:13.10-35: warning: unused value: $]3[
input.y:13.10-35: warning: unused value: $]5[
input.y:14.10-35: warning: unset value: $]$[
input.y:14.10-35: warning: unused value: $]3[
input.y:14.10-35: warning: unused value: $]5[
input.y:13.14-19: warning: unset value: $$
input.y:13.25-39: warning: unset value: $$
input.y:13.10-59: warning: unset value: $]$[
input.y:13.10-59: warning: unused value: $]3[
input.y:13.10-59: warning: unused value: $]5[
input.y:14.14-16: warning: unset value: $$
input.y:14.10-47: warning: unset value: $]$[
input.y:14.10-47: warning: unused value: $]3[
input.y:14.10-47: warning: unused value: $]5[
input.y:15.10-36: warning: unset value: $]$[
input.y:15.10-36: warning: unused value: $]3[
input.y:15.10-36: warning: unused value: $]5[