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modified: ../../src/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java

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F-Bounded Problematik durche neues greater ggf. geloest.
Es werden Falle ausgeschlossen. Diese Faelle muessen noch ergaenzt werden.
This commit is contained in:
Martin Plümicke 2018-05-24 17:45:10 +02:00
parent 704415ae3b
commit 87dede5d5f
1 changed files with 79 additions and 2 deletions
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79
src/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java
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@ -193,7 +193,83 @@ public class FiniteClosure extends Ordering<UnifyType> implements IFiniteClosure
* @return The set of supertypes of the argument.
*/
@Override
//Eingefuegt PL 2018-05-24 F-Bounded Problematik
public Set<UnifyType> greater(UnifyType type, Set<UnifyType> fBounded) {
Set<UnifyType> result = new HashSet<>();
Set<Pair<UnifyType,Set<UnifyType>>> PairResultFBounded = new HashSet<>();
Match match = new Match();
// if T = T' then T <=* T'
result.add(type);
if(!strInheritanceGraph.containsKey(type.getName()))
return result;
// if T <* T' then sigma(T) <* sigma(T')
Set<Node<UnifyType>> candidates = strInheritanceGraph.get(type.getName());
for(Node<UnifyType> candidate : candidates) {
UnifyType theta1 = candidate.getContent();
//PL 18-04-05 Unifier durch Matcher ersetzt ANFANG
ArrayList<UnifyPair> termList= new ArrayList<UnifyPair>();
termList.add(new UnifyPair(theta1,type, PairOperator.EQUALSDOT));
Optional<Unifier> optSigma = match.match(termList);
//PL 18-04-05 Unifier durch Matcher ersetzt ENDE
if(!optSigma.isPresent())
continue;
Unifier sigma = optSigma.get();
sigma.swapPlaceholderSubstitutionsReverse(theta1.getTypeParams());
Set<UnifyType> fBoundedNew = new HashSet<>(fBounded);
fBoundedNew.add(theta1);
Set<UnifyType> theta2Set = candidate.getContentOfPredecessors();
for(UnifyType theta2 : theta2Set) {
result.add(theta2.apply(sigma));
PairResultFBounded.add(new Pair<>(theta2.apply(sigma), fBoundedNew));
}
}
for(Pair<UnifyType,Set<UnifyType>> pt : PairResultFBounded) {
UnifyType t = pt.getKey();
Set<UnifyType> lfBounded = pt.getValue().get();
// if C<...> <* C<...> then ... (third case in definition of <*)
//TypeParams typeparams = t.getTypeParams();
if(t.getTypeParams().size() > 0) {
ArrayList<Set<UnifyType>> paramCandidates = new ArrayList<>();
for (int i = 0; i < t.getTypeParams().size(); i++) {
//UnifyType parai = t.getTypeParams().get(i);
int i_ef = i;
BiFunction<Boolean,UnifyType,Boolean> f = (x,y) ->
{
ArrayList<UnifyPair> termList = new ArrayList<UnifyPair>();
termList.add(new UnifyPair(y,t.getTypeParams().get(i_ef), PairOperator.EQUALSDOT));
return ((match.match(termList).isPresent()) || x);
};
//if (parai.getName().equals("java.lang.Integer")) {
// System.out.println("");
//}
BinaryOperator<Boolean> bo = (a,b) -> (a || b);
if (lfBounded.stream().reduce(false,f,bo)) continue; //F-Bounded Endlosrekursion
paramCandidates.add(grArg(t.getTypeParams().get(i), new HashSet<>(fBounded) ));
}
permuteParams(paramCandidates).forEach(x -> result.add(t.setTypeParams(x)));
}
}
return result;
}
/* auskommentiert PL 2018-05-24
/**
* Returns all types of the finite closure that are supertypes of the argument.
* @return The set of supertypes of the argument.
*
//@Override
public Set<UnifyType> oldgreater(UnifyType type, Set<UnifyType> fBounded) {
if(type instanceof FunNType)
return computeGreaterFunN((FunNType) type, fBounded);
@ -204,7 +280,7 @@ public class FiniteClosure extends Ordering<UnifyType> implements IFiniteClosure
/**
* Computes the greater function for all types except function types.
*/
*
protected Set<UnifyType> computeGreater(Set<Pair<UnifyType,Set<UnifyType>>> types) {
Set<Pair<UnifyType,Set<UnifyType>>> result = new HashSet<>();
@ -275,6 +351,7 @@ public class FiniteClosure extends Ordering<UnifyType> implements IFiniteClosure
return resut;
return computeGreater(result);
}
*/
/**
* Computes the greater function for FunN-Types