@Override
public void addSupertypeConstraint(
@NotNull NapileType subjectType,
@Nullable NapileType constrainingType,
@NotNull ConstraintPosition constraintPosition) {
addConstraint(subjectType, constrainingType, constraintPosition);
}
private void addConstraint(
@NotNull NapileType subjectType,
@Nullable NapileType constrainingType,
@NotNull ConstraintPosition constraintPosition) {
if (constrainingType == null
|| (ErrorUtils.isErrorType(constrainingType) && constrainingType != DONT_CARE)) {
hasErrorInConstrainingTypes = true;
return;
}
assert subjectType != TypeUtils.NO_EXPECTED_TYPE
: "Subject type shouldn't be NO_EXPECTED_TYPE (in position " + constraintPosition + " )";
if (constrainingType == DONT_CARE
|| ErrorUtils.isErrorType(subjectType)
|| constrainingType == TypeUtils.NO_EXPECTED_TYPE) return;
DeclarationDescriptor subjectTypeDescriptor =
subjectType.getConstructor().getDeclarationDescriptor();
if (subjectTypeDescriptor instanceof TypeParameterDescriptor) {
TypeParameterDescriptor typeParameter = (TypeParameterDescriptor) subjectTypeDescriptor;
TypeConstraintsImpl typeConstraints = typeParameterConstraints.get(typeParameter);
if (typeConstraints != null) {
if (TypeUtils.dependsOnTypeParameterConstructors(
constrainingType, Collections.singleton(DONT_CARE.getConstructor()))) return;
if (subjectType.isNullable() && constrainingType.isNullable())
constrainingType = TypeUtils.makeNotNullable(constrainingType);
typeConstraints.addBound(constrainingType);
return;
}
}
NapileType correspondingSupertype =
TypeCheckingProcedure.findCorrespondingSupertype(subjectType, constrainingType);
if (correspondingSupertype != null) subjectType = correspondingSupertype;
List<NapileType> subjectArguments = subjectType.getArguments();
List<NapileType> constrainingArguments = constrainingType.getArguments();
if (subjectArguments.size() != constrainingArguments.size()) return;
for (int i = 0; i < subjectArguments.size(); i++)
addConstraint(subjectArguments.get(i), constrainingArguments.get(i), constraintPosition);
}