ClassElement makeListElement() {
final TypeVariable typeVar = typeVar("E", itype(object));
final ClassElement element = element("List", itype(object), typeVar);
DartTypeNode returnTypeNode =
new DartTypeNode(
new DartIdentifier("Iterator"),
Arrays.asList(new DartTypeNode(new DartIdentifier("E"))));
DartMethodDefinition iteratorMethod =
DartMethodDefinition.create(
new DartIdentifier("iterator"),
new DartFunction(
Collections.<DartParameter>emptyList(),
new DartBlock(Collections.<DartStatement>emptyList()),
returnTypeNode),
Modifiers.NONE,
Collections.<DartInitializer>emptyList());
MethodNodeElement iteratorMethodElement =
Elements.methodFromMethodNode(iteratorMethod, element);
Type returnType = Types.interfaceType(iterElement, Arrays.<Type>asList(typeVar));
FunctionType functionType =
ftype(function, returnType, Collections.<String, Type>emptyMap(), null);
Elements.setType(iteratorMethodElement, functionType);
Elements.addMethod(element, iteratorMethodElement);
return element;
}
/** Add runtime type information to a "new" expression, if necessary. */
void mayAddRuntimeTypeToConstrutorOrFactoryCall(
ClassElement enclosingClass, DartNewExpression x, JsInvocation invoke) {
// TODO(johnlenz):in optimized mode, only add this where it is needed.
InterfaceType instanceType = Types.constructorType(x);
if (instanceType == null) {
// TODO(johnlenz): HackHack. Currently the "new FallThroughError" injected by the
// Normalizer does not have the instance type attached. But in this
// case we know it does not have any type parameters.
// reportError(x.getParent().getParent(), new AssertionError("missing type information"));
assert typeProvider
.getFallThroughError()
.getElement()
.lookupConstructor("")
.equals(x.getSymbol());
} else if (constructorHasTypeParameters(x)) {
ConstructorElement constructor = x.getSymbol();
ClassElement containingClassElement = enclosingClass;
if (constructor.getModifiers().isFactory()) {
// We are calling a factory, this is either in a class
FunctionType functionType = (FunctionType) constructor.getType();
JsExpression typeArgs =
generateTypeArgsArrayForFactory(functionType, instanceType, containingClassElement);
assert typeArgs != null;
invoke.getArguments().add(0, typeArgs);
} else {
ClassElement constructorClassElement = constructor.getConstructorType();
invoke
.getArguments()
.add(
0,
generateRTTLookup(constructorClassElement, instanceType, containingClassElement));
}
}
}
private boolean constructorHasTypeParameters(DartNewExpression x) {
ConstructorElement element = x.getSymbol();
if (element.getModifiers().isFactory()) {
return isParameterizedFactoryMethod((DartMethodDefinition) element.getNode());
} else {
InterfaceType instanceType = Types.constructorType(x);
return hasTypeParameters(instanceType.getElement());
}
}