@NotNull
private static Collection<CallableMemberDescriptor> extractMembersOverridableInBothWays(
@NotNull CallableMemberDescriptor overrider,
@NotNull Queue<CallableMemberDescriptor> extractFrom,
@NotNull DescriptorSink sink) {
Collection<CallableMemberDescriptor> overridable = new ArrayList<CallableMemberDescriptor>();
overridable.add(overrider);
for (Iterator<CallableMemberDescriptor> iterator = extractFrom.iterator();
iterator.hasNext(); ) {
CallableMemberDescriptor candidate = iterator.next();
if (overrider == candidate) {
iterator.remove();
continue;
}
OverrideCompatibilityInfo.Result result1 =
DEFAULT.isOverridableBy(candidate, overrider).getResult();
OverrideCompatibilityInfo.Result result2 =
DEFAULT.isOverridableBy(overrider, candidate).getResult();
if (result1 == OVERRIDABLE && result2 == OVERRIDABLE) {
overridable.add(candidate);
iterator.remove();
} else if (result1 == CONFLICT || result2 == CONFLICT) {
sink.conflict(overrider, candidate);
iterator.remove();
}
}
return overridable;
}
@Nullable
public static OverrideCompatibilityInfo.Result getBothWaysOverridability(
CallableDescriptor overriderDescriptor, CallableDescriptor candidateDescriptor) {
OverrideCompatibilityInfo.Result result1 =
DEFAULT.isOverridableBy(candidateDescriptor, overriderDescriptor, null).getResult();
OverrideCompatibilityInfo.Result result2 =
DEFAULT.isOverridableBy(overriderDescriptor, candidateDescriptor, null).getResult();
return result1 == OVERRIDABLE && result2 == OVERRIDABLE
? OVERRIDABLE
: ((result1 == CONFLICT || result2 == CONFLICT) ? CONFLICT : INCOMPATIBLE);
}
private static Collection<CallableMemberDescriptor> extractAndBindOverridesForMember(
@NotNull CallableMemberDescriptor fromCurrent,
@NotNull Collection<? extends CallableMemberDescriptor> descriptorsFromSuper,
@NotNull ClassDescriptor current,
@NotNull DescriptorSink sink) {
Collection<CallableMemberDescriptor> bound =
new ArrayList<CallableMemberDescriptor>(descriptorsFromSuper.size());
for (CallableMemberDescriptor fromSupertype : descriptorsFromSuper) {
OverrideCompatibilityInfo.Result result =
DEFAULT.isOverridableBy(fromSupertype, fromCurrent).getResult();
boolean isVisible =
Visibilities.isVisible(ReceiverValue.IRRELEVANT_RECEIVER, fromSupertype, current);
switch (result) {
case OVERRIDABLE:
if (isVisible) {
fromCurrent.addOverriddenDescriptor(fromSupertype);
}
bound.add(fromSupertype);
break;
case CONFLICT:
if (isVisible) {
sink.conflict(fromSupertype, fromCurrent);
}
bound.add(fromSupertype);
break;
case INCOMPATIBLE:
break;
}
}
return bound;
}
public static boolean isMoreSpecific(
@NotNull CallableDescriptor a, @NotNull CallableDescriptor b) {
KotlinType aReturnType = a.getReturnType();
KotlinType bReturnType = b.getReturnType();
assert aReturnType != null : "Return type of " + a + " is null";
assert bReturnType != null : "Return type of " + b + " is null";
if (!isVisibilityMoreSpecific(a, b)) return false;
if (a instanceof SimpleFunctionDescriptor) {
assert b instanceof SimpleFunctionDescriptor : "b is " + b.getClass();
return isReturnTypeMoreSpecific(a, aReturnType, b, bReturnType);
}
if (a instanceof PropertyDescriptor) {
assert b instanceof PropertyDescriptor : "b is " + b.getClass();
PropertyDescriptor pa = (PropertyDescriptor) a;
PropertyDescriptor pb = (PropertyDescriptor) b;
if (!isAccessorMoreSpecific(pa.getSetter(), pb.getSetter())) return false;
if (pa.isVar() && pb.isVar()) {
return DEFAULT
.createTypeChecker(a.getTypeParameters(), b.getTypeParameters())
.equalTypes(aReturnType, bReturnType);
} else {
// both vals or var vs val: val can't be more specific then var
return !(!pa.isVar() && pb.isVar())
&& isReturnTypeMoreSpecific(a, aReturnType, b, bReturnType);
}
}
throw new IllegalArgumentException("Unexpected callable: " + a.getClass());
}
private static boolean isReturnTypeMoreSpecific(
@NotNull CallableDescriptor a,
@NotNull KotlinType aReturnType,
@NotNull CallableDescriptor b,
@NotNull KotlinType bReturnType) {
KotlinTypeChecker typeChecker =
DEFAULT.createTypeChecker(a.getTypeParameters(), b.getTypeParameters());
return typeChecker.isSubtypeOf(aReturnType, bReturnType);
}
@NotNull
public static <D extends CallableMemberDescriptor> Collection<D> resolveOverrides(
@NotNull Name name,
@NotNull Collection<D> membersFromSupertypes,
@NotNull Collection<D> membersFromCurrent,
@NotNull ClassDescriptor classDescriptor,
@NotNull final ErrorReporter errorReporter) {
final Set<D> result = new HashSet<D>();
OverridingUtil.generateOverridesInFunctionGroup(
name,
membersFromSupertypes,
membersFromCurrent,
classDescriptor,
new OverridingUtil.DescriptorSink() {
@Override
@SuppressWarnings("unchecked")
public void addToScope(@NotNull CallableMemberDescriptor fakeOverride) {
OverridingUtil.resolveUnknownVisibilityForMember(
fakeOverride,
new Function1<CallableMemberDescriptor, Unit>() {
@Override
public Unit invoke(@NotNull CallableMemberDescriptor descriptor) {
errorReporter.reportCannotInferVisibility(descriptor);
return Unit.INSTANCE$;
}
});
result.add((D) fakeOverride);
}
@Override
public void conflict(
@NotNull CallableMemberDescriptor fromSuper,
@NotNull CallableMemberDescriptor fromCurrent) {
// nop
}
});
return result;
}
private static Collection<CallableMemberDescriptor> extractAndBindOverridesForMember(
@NotNull CallableMemberDescriptor fromCurrent,
@NotNull Collection<? extends CallableMemberDescriptor> descriptorsFromSuper,
@NotNull ClassDescriptor current,
@NotNull OverridingStrategy strategy) {
Collection<CallableMemberDescriptor> bound =
new ArrayList<CallableMemberDescriptor>(descriptorsFromSuper.size());
Collection<CallableMemberDescriptor> overridden = SmartSet.create();
for (CallableMemberDescriptor fromSupertype : descriptorsFromSuper) {
OverrideCompatibilityInfo.Result result =
DEFAULT.isOverridableBy(fromSupertype, fromCurrent, current).getResult();
boolean isVisibleForOverride = isVisibleForOverride(fromCurrent, fromSupertype);
switch (result) {
case OVERRIDABLE:
if (isVisibleForOverride) {
overridden.add(fromSupertype);
}
bound.add(fromSupertype);
break;
case CONFLICT:
if (isVisibleForOverride) {
strategy.overrideConflict(fromSupertype, fromCurrent);
}
bound.add(fromSupertype);
break;
case INCOMPATIBLE:
break;
}
}
strategy.setOverriddenDescriptors(fromCurrent, overridden);
return bound;
}