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remove iff

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-05-16 18:35:38 -07:00 • committed by Arie Gurfinkel
parent ecf15ab07d
commit ff0f257102
47 changed files with 199 additions and 264 deletions
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5
src/ast/normal_forms/nnf.cpp
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@ -582,7 +582,7 @@ struct nnf::imp {
return true;
}
bool is_eq(app * t) const { return m().is_eq(t) || m().is_iff(t); }
bool is_eq(app * t) const { return m().is_eq(t); }
bool process_iff_xor(app * t, frame & fr) {
SASSERT(t->get_num_args() == 2);
@ -630,7 +630,7 @@ struct nnf::imp {
}
bool process_eq(app * t, frame & fr) {
if (m().is_bool(t->get_arg(0)))
if (m().is_iff(t))
return process_iff_xor(t, fr);
else
return process_default(t, fr);
@ -725,7 +725,6 @@ struct nnf::imp {
return process_implies(t, fr);
case OP_ITE:
return process_ite(t, fr);
case OP_IFF:
case OP_XOR:
return process_iff_xor(t, fr);
case OP_EQ: