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graph: prefer *.gv to *.dot

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Reported by Hans Åberg.
https://lists.gnu.org/archive/html/help-bison/2019-02/msg00064.html

* src/files.c (spec_graph_file): Use `*.gv` when 3.4 or better,
otherwise `*.dot`.
* src/parse-gram.y (handle_require): Pretend we are already 3.4.
* doc/bison.texi: Adjust.
* tests/local.at, tests/output.at: Exercise this.
This commit is contained in:
Akim Demaille
2019-02-19 18:16:02 +01:00
parent 98020cedf7
commit bd55d43333
8 changed files with 42 additions and 28 deletions
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tests/output.at
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@@ -76,6 +76,8 @@ AT_CHECK_OUTPUT([foo.y], [], [-dv -o foo.tab.c],
AT_CHECK_OUTPUT([foo.y], [], [-dv -g --xml -y],
[y.dot y.output y.tab.c y.tab.h y.xml])
AT_CHECK_OUTPUT([foo.y], [%require "3.4"], [-dv -g --xml -y],
[y.gv y.output y.tab.c y.tab.h y.xml])
# With '-o y.tab.c', we expect 'y.output' etc. (for compatibility with Yacc).
AT_CHECK_OUTPUT([foo.y], [], [-dv -g --xml -o y.tab.c],
[y.dot y.output y.tab.c y.tab.h y.xml])