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* src/tgbaalgos/ltl2tgba.cc (ltl_trad_visitor::visit(multop)):

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Forward root_ to children of And.
(ltl_trad_visitor::recurse): Take a root argument.
This commit is contained in:
Alexandre Duret-Lutz 2003-07-10 14:27:19 +00:00
parent b963af66f1
commit 9a4da5ffd4
2 changed files with 13 additions and 3 deletions
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12
src/tgbaalgos/ltl2tgba.cc
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@ -191,11 +191,17 @@ namespace spot
visit(const multop* node)
{
int op = -1;
bool root = false;
switch (node->op())
{
case multop::And:
op = bddop_and;
res_ = bddtrue;
// When the root formula is a conjunction it's ok to
// consider all children as root formulae. This allows the
// root-G trick to save many more variable. (See the
// translation of G.)
root = root_;
break;
case multop::Or:
op = bddop_or;
@ -206,14 +212,14 @@ namespace spot
unsigned s = node->size();
for (unsigned n = 0; n < s; ++n)
{
res_ = bdd_apply(res_, recurse(node->nth(n)), op);
res_ = bdd_apply(res_, recurse(node->nth(n), root), op);
}
}
bdd
recurse(const formula* f)
recurse(const formula* f, bool root = false)
{
ltl_trad_visitor v(fact_);
ltl_trad_visitor v(fact_, root);
f->accept(v);
return v.result();
}