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doc: document carets

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* NEWS: Announce it.
* doc/bison.texi (Bison Options):  Here.
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Theophile Ranquet
2012-12-04 13:12:12 +01:00
parent 505ece5171
commit 7bada5355e
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13
NEWS
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@@ -7,6 +7,19 @@ GNU Bison NEWS
The introduction of this feature, in 2.4, was four years ago. The --language
option and the %language directive are no longer experimental.
** New format for error reports: carets
Caret errors have been added to Bison, for example (taken from the
documentation):
input.y:3.20-23: error: ambiguous reference: '$exp'
exp: exp '+' exp { $exp = $1 + $2; };
^^^^
The default behaviour for now is still not to display these unless explictly
asked with -fall of -fcaret. However, in a later release, it will be made the
default behavior (but may still be deactivated with -fno-caret).
** New value for %define variable: api.pure full
The %define variable api.pure requests a pure (reentrant) parser. However,