Java Code Examples for org.eclipse.xtext.xbase.typesystem.references.LightweightBoundTypeArgument#getDeclaredVariance()
The following examples show how to use
org.eclipse.xtext.xbase.typesystem.references.LightweightBoundTypeArgument#getDeclaredVariance() .
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Example 1
| Source File: ResolvedTypes.java From xtext-extras with Eclipse Public License 2.0 | 5 votes |
|
protected void addNonRecursiveHints(LightweightBoundTypeArgument original, List<LightweightBoundTypeArgument> hints, Set<Object> seenHandles,
List<LightweightBoundTypeArgument> result) {
for(LightweightBoundTypeArgument hint: hints) {
LightweightTypeReference reference = hint.getTypeReference();
if (reference instanceof UnboundTypeReference) {
addNonRecursiveHints(original, (UnboundTypeReference)reference, seenHandles, result);
} else {
if (original.getDeclaredVariance() == VarianceInfo.IN && hint.getTypeReference() instanceof WildcardTypeReference) {
LightweightTypeReference upperBound = hint.getTypeReference().getUpperBoundSubstitute();
if (upperBound instanceof UnboundTypeReference) {
addNonRecursiveHints(original, (UnboundTypeReference)upperBound, seenHandles, result);
} else {
LightweightBoundTypeArgument delegateHint = new LightweightBoundTypeArgument(
upperBound, original.getSource(), hint.getOrigin(), hint.getDeclaredVariance(), original.getActualVariance());
result.add(delegateHint);
}
} else {
if (!result.isEmpty()) {
if (original.getDeclaredVariance() == VarianceInfo.OUT && original.getActualVariance() == VarianceInfo.INVARIANT) {
if (hint.getDeclaredVariance() == VarianceInfo.OUT && hint.getActualVariance() == VarianceInfo.INVARIANT) {
continue;
}
}
if (!result.contains(hint))
result.add(hint);
} else {
result.add(hint);
}
}
}
}
}
Example 2
| Source File: BoundTypeArgumentMerger.java From xtext-extras with Eclipse Public License 2.0 | 5 votes |
|
protected LightweightMergedBoundTypeArgument getSingleArgumentAsMergedArgument(LightweightBoundTypeArgument argument) {
LightweightTypeReference typeReference = argument.getTypeReference();
VarianceInfo varianceInfo = argument.getDeclaredVariance().mergeDeclaredWithActual(argument.getActualVariance());
if (argument.getDeclaredVariance() == VarianceInfo.IN && varianceInfo == VarianceInfo.INVARIANT) {
if (typeReference.getKind() == LightweightTypeReference.KIND_WILDCARD_TYPE_REFERENCE) {
typeReference = typeReference.getInvariantBoundSubstitute();
}
}
return new LightweightMergedBoundTypeArgument(typeReference, varianceInfo);
}
Example 3
| Source File: StackedResolvedTypes.java From xtext-extras with Eclipse Public License 2.0 | 4 votes |
|
protected void mergeTypeParametersIntoParent(ResolvedTypes parent) {
for(UnboundTypeReference unbound: basicGetTypeParameters().values()) {
LightweightTypeReference resolvedTo = unbound.getResolvedTo();
if (resolvedTo == null) {
List<JvmTypeParameter> typeParameters = basicGetDeclardTypeParameters();
if (typeParameters != null && typeParameters.contains(unbound.getTypeParameter())) {
unbound.tryResolve();
if (!unbound.internalIsResolved()) {
if (unbound.getExpression() instanceof XConstructorCall) {
unbound.resolve(); // resolve against constraints
} else {
unbound.acceptHint(unbound.getOwner().newParameterizedTypeReference(unbound.getTypeParameter()),
BoundTypeArgumentSource.RESOLVED, unbound, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
}
}
} else {
LightweightTypeReference reference = unbound.copyInto(parent.getReferenceOwner());
if (reference instanceof UnboundTypeReference) {
parent.acceptUnboundTypeReference(unbound.getHandle(), (UnboundTypeReference) reference);
}
}
}
}
Map<Object, List<LightweightBoundTypeArgument>> typeParameterHints = basicGetTypeParameterHints();
for(Map.Entry<Object, List<LightweightBoundTypeArgument>> hint: typeParameterHints.entrySet()) {
if (!parent.isResolved(hint.getKey())) {
List<LightweightBoundTypeArgument> boundTypeArguments = hint.getValue();
for(LightweightBoundTypeArgument boundTypeArgument: boundTypeArguments) {
if (boundTypeArgument.getOrigin() instanceof VarianceInfo) {
parent.acceptHint(hint.getKey(), boundTypeArgument);
} else {
LightweightBoundTypeArgument copy = new LightweightBoundTypeArgument(
boundTypeArgument.getTypeReference().copyInto(parent.getReferenceOwner()),
boundTypeArgument.getSource(), boundTypeArgument.getOrigin(),
boundTypeArgument.getDeclaredVariance(),
boundTypeArgument.getActualVariance());
parent.acceptHint(hint.getKey(), copy);
}
}
}
}
}
Example 4
| Source File: ResolvedTypes.java From xtext-extras with Eclipse Public License 2.0 | 4 votes |
|
public void acceptHint(Object handle, LightweightBoundTypeArgument boundTypeArgument) {
if (boundTypeArgument.getSource() == BoundTypeArgumentSource.RESOLVED) {
if (resolvedTypeParameters == null) {
resolvedTypeParameters = new SharedKeysAwareSet<Object>(shared.allResolvedTypeParameters);
}
if (resolvedTypeParameters.add(handle)) {
if (boundTypeArgument.getDeclaredVariance().mergeDeclaredWithActual(boundTypeArgument.getActualVariance()) == VarianceInfo.INVARIANT) {
resolveDependentTypeArguments(handle, boundTypeArgument);
}
LightweightBoundTypeArgument boundWithoutRecursion = removeRecursiveTypeArguments(handle, boundTypeArgument);
ensureTypeParameterHintsMapExists().put(handle, Collections.singletonList(boundWithoutRecursion));
}
} else {
if (!isResolved(handle)) {
if (boundTypeArgument.getTypeReference() instanceof UnboundTypeReference && boundTypeArgument.getSource() != BoundTypeArgumentSource.CONSTRAINT) {
UnboundTypeReference other = (UnboundTypeReference) boundTypeArgument.getTypeReference();
Object otherHandle = other.getHandle();
if (ensureTypeParameterHintsMapExists().containsKey(handle)) {
// don't add fully redundant hints
List<LightweightBoundTypeArgument> existingValues = ensureTypeParameterHintsMapExists().get(handle);
for(LightweightBoundTypeArgument existingValue: existingValues) {
if (existingValue.getTypeReference() instanceof UnboundTypeReference) {
if (((UnboundTypeReference) existingValue.getTypeReference()).getHandle() == otherHandle) {
if (existingValue.getActualVariance() == boundTypeArgument.getActualVariance()
&& existingValue.getDeclaredVariance() == boundTypeArgument.getDeclaredVariance()
&& existingValue.getSource() == boundTypeArgument.getSource()) {
return;
}
}
}
}
}
UnboundTypeReference currentUnbound = getUnboundTypeReference(handle);
Maps2.putIntoListMap(otherHandle, copyBoundTypeArgument(currentUnbound, boundTypeArgument), ensureTypeParameterHintsMapExists());
}
Maps2.putIntoListMap(handle, boundTypeArgument, ensureTypeParameterHintsMapExists());
} else {
throw new IllegalStateException("Cannot add hints if the reference was already resolved");
}
}
}
Example 5
| Source File: ResolvedTypes.java From xtext-extras with Eclipse Public License 2.0 | 4 votes |
|
protected LightweightBoundTypeArgument copyBoundTypeArgument(LightweightTypeReference typeReference,
LightweightBoundTypeArgument boundTypeArgument) {
return new LightweightBoundTypeArgument(typeReference, boundTypeArgument.getSource(),
boundTypeArgument.getOrigin(), boundTypeArgument.getDeclaredVariance(),
boundTypeArgument.getActualVariance());
}
Example 6
| Source File: ExpectationTypeParameterHintCollector.java From xtext-extras with Eclipse Public License 2.0 | 4 votes |
|
@Override
public void doVisitUnboundTypeReference(UnboundTypeReference reference,
ParameterizedTypeReference declaration) {
boolean constraintSeen = false;
boolean constraintsMatch = true;
boolean othersSeen = false;
boolean declarationMatches = getExpectedVariance() != VarianceInfo.OUT;
if (reference.getTypeParameter() != declaration.getType()) {
List<LightweightBoundTypeArgument> hints = reference.getAllHints();
for(int i = 0; i < hints.size(); i++) {
LightweightBoundTypeArgument hint = hints.get(i);
if (hint.getSource() == BoundTypeArgumentSource.CONSTRAINT) {
constraintSeen = true;
outerVisit(hint.getTypeReference(), declaration, hint.getSource(), hint.getDeclaredVariance(), hint.getActualVariance());
if (constraintsMatch && !hint.getTypeReference().isAssignableFrom(declaration)) {
constraintsMatch = false;
}
} else {
othersSeen = true;
// we don't break the list traversal here since we want to do the paired outerVisit for all constraints
if (declarationMatches) {
if (hint.getActualVariance() == VarianceInfo.OUT && hint.getDeclaredVariance() == VarianceInfo.OUT &&
(hint.getSource() == BoundTypeArgumentSource.INFERRED || hint.getSource() == BoundTypeArgumentSource.INFERRED_EXPECTATION || hint.getSource() == BoundTypeArgumentSource.INFERRED_LATER)) {
if (!declaration.isAssignableFrom(hint.getTypeReference())) {
declarationMatches = false;
}
} else {
declarationMatches = false;
}
}
}
}
} else {
if (getOwner().getDeclaredTypeParameters().contains(reference.getTypeParameter())) {
reference.acceptHint(declaration, BoundTypeArgumentSource.RESOLVED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
return;
}
}
if (constraintSeen && constraintsMatch && !othersSeen) {
reference.acceptHint(declaration, BoundTypeArgumentSource.RESOLVED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else if (!constraintSeen && !reference.internalIsResolved() && declaration.isResolved() && !getOwner().isResolved(reference.getHandle()) && reference.canResolveTo(declaration)) {
reference.acceptHint(declaration, BoundTypeArgumentSource.RESOLVED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else if (othersSeen && declarationMatches) {
reference.acceptHint(declaration, BoundTypeArgumentSource.INFERRED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else {
reference.tryResolve();
if (reference.internalIsResolved()) {
outerVisit(reference, declaration);
} else {
addHint(reference, declaration);
}
}
}
Example 7
| Source File: ExpectationTypeParameterHintCollector.java From xtext-extras with Eclipse Public License 2.0 | 4 votes |
|
@Override
public void doVisitUnboundTypeReference(UnboundTypeReference reference, ArrayTypeReference declaration) {
boolean constraintSeen = false;
boolean constraintsMatch = true;
boolean othersSeen = false;
boolean declarationMatches = getExpectedVariance() != VarianceInfo.OUT;
List<LightweightBoundTypeArgument> hints = reference.getAllHints();
for(int i = 0; i < hints.size(); i++) {
LightweightBoundTypeArgument hint = hints.get(i);
if (hint.getSource() == BoundTypeArgumentSource.CONSTRAINT) {
constraintSeen = true;
outerVisit(hint.getTypeReference(), declaration, hint.getSource(), hint.getDeclaredVariance(), hint.getActualVariance());
if (constraintsMatch && !hint.getTypeReference().isAssignableFrom(declaration)) {
constraintsMatch = false;
}
} else {
othersSeen = true;
// we don't break the list traversal here since we want to do the paired outerVisit for all constraints
if (declarationMatches) {
if (hint.getActualVariance() == VarianceInfo.OUT && hint.getDeclaredVariance() == VarianceInfo.OUT &&
(hint.getSource() == BoundTypeArgumentSource.INFERRED || hint.getSource() == BoundTypeArgumentSource.INFERRED_LATER || hint.getSource() == BoundTypeArgumentSource.INFERRED_EXPECTATION)) {
if (!declaration.isAssignableFrom(hint.getTypeReference())) {
declarationMatches = false;
}
} else {
declarationMatches = false;
}
}
}
}
if (constraintSeen && constraintsMatch && !othersSeen) {
reference.acceptHint(declaration, BoundTypeArgumentSource.RESOLVED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else if (!constraintSeen && !reference.internalIsResolved() && declaration.isResolved() && !getOwner().isResolved(reference.getHandle()) && reference.canResolveTo(declaration)) {
reference.acceptHint(declaration, BoundTypeArgumentSource.RESOLVED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else if (othersSeen && declarationMatches) {
reference.acceptHint(declaration, BoundTypeArgumentSource.INFERRED, this, VarianceInfo.INVARIANT, VarianceInfo.INVARIANT);
} else {
reference.tryResolve();
if (reference.internalIsResolved()) {
outerVisit(reference, declaration);
} else {
addHint(reference, declaration);
}
}
}
