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Automata with no state are no longer allowed.

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* NEWS, spot/twa/twa.hh: Document the change.
* spot/twa/twagraph.hh, spot/kripke/kripkegraph.hh:
  Add an exception in get_init_state_number().
  get_init_state() now calls get_init_state_number().
* spot/twa/twagraph.cc, spot/twaalgos/simulation.cc,
  spot/twaalgos/powerset.cc, spot/twaalgos/complete.cc,
  spot/twaalgos/sccfilter.cc: Remove now useless tests.
* spot/twaalgos/hoa.cc: Remove now useless comment.
* spot/twaalgos/minimize.cc: Never return an automaton with no state.
This commit is contained in:
Maximilien Colange 2016-11-25 13:42:13 +01:00
parent da6fc955a3
commit b3ee68310f
11 changed files with 24 additions and 38 deletions
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5
spot/twaalgos/simulation.cc
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@ -161,14 +161,11 @@ namespace spot
throw std::runtime_error
("direct_simulation() requires separate Inf and Fin sets");
// Call get_init_state_number() before anything else as it
// might add a state.
unsigned init_state_number = in->get_init_state_number();
scc_info_.reset(new scc_info(in));
unsigned ns = in->num_states();
assert(ns > 0);
size_a_ = ns;
unsigned init_state_number = in->get_init_state_number();
auto all_inf = in->get_acceptance().used_inf_fin_sets().first;
all_inf_ = all_inf;