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twa_graph: add support for universal initial states

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The only missing point is that the HOA parser cannot deal with multiple
universal initial states, as seen in parseaut.test.

* spot/graph/graph.hh (new_univ_dests): New function, extracted from...
(new_univ_edge): ... this one.
* spot/twa/twagraph.hh (set_univ_init_state): Implement using
new_univ_dests.
* spot/twaalgos/dot.cc, spot/twaalgos/hoa.cc, python/spot/impl.i:
Add support for universal initial states.
* spot/parseaut/parseaut.yy: Add preliminary support for
universal initial states.  Multiple universal initial states
are still not supported.
* tests/core/alternating.test, tests/core/parseaut.test,
tests/python/alternating.py: Adjust tests and exercise this new feature.
This commit is contained in:
Alexandre Duret-Lutz 2016-11-30 14:22:44 +01:00
parent d5c9c34514
commit 48c812a595
9 changed files with 193 additions and 88 deletions
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3
tests/core/parseaut.test
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@ -1921,8 +1921,7 @@ State: 11 "t"
EOF
expecterr input <<EOF
input:4.8-12: alternation is not yet supported for initial states
autfilt: failed to read automaton from input
input:4.1-12: alternating automata only support a single initial state
EOF
# Some alternation errors