private static PsiType getIteratedType(PsiElement parent, PsiType collection) {
if (parent instanceof GrReferenceExpression) {
final GrExpression qualifier = ((GrReferenceExpression) parent).getQualifier();
if (qualifier != null) {
return ClosureParameterEnhancer.findTypeForIteration(qualifier, parent);
}
}
final PsiType iterable = PsiUtil.extractIterableTypeParameter(collection, true);
if (iterable != null && parent instanceof GrExpression) {
return PsiImplUtil.normalizeWildcardTypeByPosition(iterable, (GrExpression) parent);
} else {
return iterable;
}
}
private void getVariantsFromQualifierForSpreadOperator(@NotNull GrExpression qualifier) {
final PsiType spreadType = ClosureParameterEnhancer.findTypeForIteration(qualifier, myRefExpr);
if (spreadType != null) {
getVariantsFromQualifierType(spreadType, myRefExpr.getProject());
}
}
public static boolean isAssignable(
@Nullable PsiType lType, @Nullable PsiType rType, @NotNull PsiElement context) {
if (lType == null || rType == null) {
return false;
}
if (rType instanceof PsiIntersectionType) {
for (PsiType child : ((PsiIntersectionType) rType).getConjuncts()) {
if (isAssignable(lType, child, context)) {
return true;
}
}
return false;
}
if (lType instanceof PsiIntersectionType) {
for (PsiType child : ((PsiIntersectionType) lType).getConjuncts()) {
if (!isAssignable(child, rType, context)) {
return false;
}
}
return true;
}
if (rType == PsiType.NULL) {
return !(lType instanceof PsiPrimitiveType);
}
if (isNumericType(lType) && isNumericType(rType)) {
return true;
}
if (isClassType(lType, JAVA_LANG_STRING)) {
return true;
}
final PsiManager manager = context.getManager();
final GlobalSearchScope scope = context.getResolveScope();
if (lType instanceof PsiArrayType) {
PsiType lComponentType = ((PsiArrayType) lType).getComponentType();
PsiType rComponentType = ClosureParameterEnhancer.findTypeForIteration(rType, context);
if (rComponentType != null && isAssignable(lComponentType, rComponentType, context)) {
return true;
}
}
if (unboxPrimitiveTypeWrapper(lType) == PsiType.CHAR
&& (isClassType(rType, JAVA_LANG_STRING) || isClassType(rType, GROOVY_LANG_GSTRING))) {
return true;
}
if (isAssignableByMethodCallConversion(lType, rType, context)) return true;
lType = boxPrimitiveType(lType, manager, scope);
rType = boxPrimitiveType(rType, manager, scope);
if (lType.isAssignableFrom(rType)) {
return true;
}
if (context instanceof GroovyPsiElement) {
for (GrTypeConverter converter : GrTypeConverter.EP_NAME.getExtensions()) {
if (!converter.isAllowedInMethodCall()) {
Boolean result = converter.isConvertible(lType, rType, (GroovyPsiElement) context);
if (result != null) {
return result;
}
}
}
}
return false;
}