is_unambiguous: fix detection of empty languages

* src/tests/unambig.test: New test case.  Reported by Ming-Hsien Tsai.
* src/twaalgos/sccfilter.cc: Always create an initial state.
* src/twaalgos/isunamb.cc: Speed up on empty languages.
* NEWS, THANKS: Update.
This commit is contained in:
Alexandre Duret-Lutz 2015-10-20 08:06:31 +02:00
parent 61bf5daab4
commit cd8e53de09
5 changed files with 29 additions and 5 deletions

1
THANKS
View file

@ -21,6 +21,7 @@ Kristin Y. Rozier
Martin Dieguez Lodeiro
Michael Tautschnig
Michael Weber
Ming-Hsien Tsai
Nikos Gorogiannis
Rüdiger Ehlers
Silien Hong