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fix indexing bug on anonvars.

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This commit is contained in:
Mark Thom
2017-09-16 15:25:11 -06:00
parent e1644dcbb6
commit e4e9b09175
2 changed files with 11 additions and 8 deletions
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15
src/prolog/codegen.rs
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@@ -462,13 +462,16 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
let mut left_index = 0;
for (right_index, clause) in clauses.iter().enumerate() {
if let Some(&Term::Var(_, _)) = clause.first_arg() {
if left_index < right_index {
subseqs.push((left_index, right_index));
}
match clause.first_arg() {
Some(&Term::Var(_, _)) | Some(&Term::AnonVar) => {
if left_index < right_index {
subseqs.push((left_index, right_index));
}
subseqs.push((right_index, right_index + 1));
left_index = right_index + 1;
subseqs.push((right_index, right_index + 1));
left_index = right_index + 1;
},
_ => {}
}
}