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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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17
spot/twa/twagraph.hh
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@ -268,6 +268,23 @@ namespace spot
set_init_state(state_number(s));
}
template<class I>
void set_univ_init_state(I dst_begin, I dst_end)
{
auto ns = num_states();
for (I i = dst_begin; i != dst_end; ++i)
if (SPOT_UNLIKELY(*i >= ns))
throw std::invalid_argument
("set_univ_init_state() called with nonexisiting state");
init_number_ = g_.new_univ_dests(dst_begin, dst_end);
}
template<class I>
void set_univ_init_state(const std::initializer_list<state_num>& il)
{
set_univ_init_state(il.begin(), il.end());
}
state_num get_init_state_number() const
{
// If the automaton has no state, it has no initial state.