rishi/scryer-prolog
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add provisional module support.

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This commit is contained in:
Mark Thom
2018-03-02 22:28:12 -07:00
parent 33834609c3
commit 8a63623516
21 changed files with 839 additions and 426 deletions
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4
src/prolog/iterators.rs
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@@ -34,7 +34,7 @@ impl<'a> QueryIterator<'a> {
&Term::Constant(_, _) =>
return QueryIterator { state_stack: vec![] },
&Term::Var(ref cell, ref var) =>
TermIterState::Var(Level::Root, cell, var)
TermIterState::Var(Level::Root, cell, (*var).clone())
};
QueryIterator { state_stack: vec![state] }
@@ -138,7 +138,7 @@ impl<'a> FactIterator<'a> {
&Term::Constant(ref cell, ref constant) =>
vec![TermIterState::Constant(Level::Root, cell, constant)],
&Term::Var(ref cell, ref var) =>
vec![TermIterState::Var(Level::Root, cell, var)]
vec![TermIterState::Var(Level::Root, cell, var.clone())]
};
FactIterator { state_queue: VecDeque::from(states) }