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twa: call unregister_all_my_variables()

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Fixes #129.

* spot/twa/twa.cc (~twa): call unregister_all_my_variables()
* spot/twa/twagraph.hh, spot/twa/twaproduct.cc,
spot/twaalgos/stutter.cc: Simplify.
* NEWS: Mention the change.
This commit is contained in:
Alexandre Duret-Lutz 2016-01-10 21:02:31 +01:00
parent d0b38156f3
commit d22ecba9b6
5 changed files with 6 additions and 8 deletions
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6
NEWS
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@ -2,7 +2,7 @@ New in spot 1.99.6a (not yet released)
Command-line tools:
* BACKWARD INCOMPATIBILE CHANGE: All tools that output automata now
* BACKWARD INCOMPATIBLE CHANGE: All tools that output automata now
use the HOA format by default instead of the GraphViz output.
This makes it easier to pipe several commands.
@ -41,6 +41,10 @@ New in spot 1.99.6a (not yet released)
renamed to spot/ltsmin/, so that installed and non-installed
directories can be used similarly.
* twa::~twa() is now calling
get_dict()->unregister_all_my_variable(this);
so this does not need to be done in any subclass.
* is_inherently_weak_automaton() is a new function, and
check_strength() has been modified to also check inherently weak
automata.