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fixed bug in standard unify

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This commit is contained in:
Florian Steurer 2016-04-12 15:17:12 +02:00
parent 1b9a9c0841
commit ba636e1da0
1 changed files with 10 additions and 9 deletions
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5
src/de/dhbwstuttgart/typeinference/unify/MartelliMontanariUnify.java
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@ -57,8 +57,7 @@ public class MartelliMontanariUnify implements IUnify {
} }
// REDUCE - Rule // REDUCE - Rule
if(!(rhsType instanceof PlaceholderType) && !(lhsType instanceof PlaceholderType) if(!(rhsType instanceof PlaceholderType) && !(lhsType instanceof PlaceholderType)) {
&& (rhsTypeParams.size() != 0 || lhsTypeParams.size() != 0)) {
Set<UnifyPair> result = new HashSet<>(); Set<UnifyPair> result = new HashSet<>();
// f<...> = g<...> with f != g are not unifiable // f<...> = g<...> with f != g are not unifiable
@ -68,6 +67,7 @@ public class MartelliMontanariUnify implements IUnify {
if(rhsTypeParams.size() != lhsTypeParams.size()) if(rhsTypeParams.size() != lhsTypeParams.size())
return Optional.empty(); // conflict return Optional.empty(); // conflict
if(rhsTypeParams.size() != 0) {
// Unpack the arguments // Unpack the arguments
for(int i = 0; i < rhsTypeParams.size(); i++) for(int i = 0; i < rhsTypeParams.size(); i++)
result.add(new UnifyPair(rhsTypeParams.get(i), lhsTypeParams.get(i), PairOperator.EQUALSDOT)); result.add(new UnifyPair(rhsTypeParams.get(i), lhsTypeParams.get(i), PairOperator.EQUALSDOT));
@ -76,6 +76,7 @@ public class MartelliMontanariUnify implements IUnify {
termsList.addAll(result); termsList.addAll(result);
continue; continue;
} }
}
// SWAP - Rule // SWAP - Rule
if(!(lhsType instanceof PlaceholderType) && (rhsType instanceof PlaceholderType)) { if(!(lhsType instanceof PlaceholderType) && (rhsType instanceof PlaceholderType)) {