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relations with no columns are not always non-empty.

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fix that in the udoc datalog backend

Signed-off-by: Nuno Lopes <a-nlopes@microsoft.com>
This commit is contained in:
Nuno Lopes 2014-09-25 16:27:20 +01:00
parent aaa931e0d5
commit b7397b6967
1 changed files with 1 additions and 1 deletions
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2
src/muz/rel/udoc_relation.cpp
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@ -63,7 +63,7 @@ namespace datalog {
m_elems.push_back(fact2doc(f));
}
bool udoc_relation::empty() const {
if (get_signature().empty()) return false;
if (m_elems.is_empty()) return true;
// TBD: make this a complete check
for (unsigned i = 0; i < m_elems.size(); ++i) {
if (!dm.is_empty(m_elems[i])) return false;