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twagraph: fix highlight-edges in defrag_states

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Fixes #555 reported by Dávid Smolka.

* spot/twa/twagraph.cc (defrag_states): Update highlight-edge.
* spot/graph/graph.hh (defrag_states): Just point to
twa_graph::defrag_states in a comment, because the latter relies
on the implementation detail of graph::defrag_state.
* tests/python/parsetgba.py: Add test case.
* NEWS: Mention the bug.
This commit is contained in:
Alexandre Duret-Lutz 2023-11-23 20:27:05 +01:00
parent 193fdd6f95
commit 55575a11e3
4 changed files with 66 additions and 0 deletions
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5
spot/graph/graph.hh
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@ -1485,6 +1485,11 @@ namespace spot
// Shift all edges in edges_. The algorithm is
// similar to remove_if, but it also keeps the correspondence
// between the old and new index as newidx[old] = new.
//
// If you change anything to this logic, you might want to
// double check twa_graph::defrag_states where we need to
// predict the new edges indices in order to update
// highlight-edges.
unsigned tend = edges_.size();
std::vector<edge> newidx(tend);
unsigned dest = 1;