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yacc.c: provide the Bison version as an integral macro

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Suggested by Balazs Scheidler.
https://github.com/akimd/bison/issues/55

* src/muscle-tab.c (muscle_init): Move/rename `b4_version` to/as...
* src/output.c (prepare): `b4_version_string`.
Also define `b4_version`.
* data/skeletons/bison.m4, data/skeletons/c.m4, data/skeletons/d.m4,
* data/skeletons/java.m4: Adjust.
* doc/bison.texi: Document it.
This commit is contained in:
Akim Demaille
2020-11-11 08:42:16 +01:00
parent d3c575a6c6
commit 21c147b6e5
9 changed files with 30 additions and 17 deletions
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6
doc/bison.texi
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@@ -15434,6 +15434,12 @@ Macro to discard a value from the parser stack and fake a lookahead
token. @xref{Action Features}.
@end deffn
@deffn {Macro} YYBISON
The version of Bison as an integer, for instance 30704 for version 3.7.4.
Defined in @file{yacc.c} only. Before version 3.7.4, @code{YYBISON} was
defined to 1.
@end deffn
@deffn {Variable} yychar
External integer variable that contains the integer value of the
lookahead token. (In a pure parser, it is a local variable within