private RppMethodInfo FindGenericConstructor(RType targetType, out RType inferredType)
{
inferredType = null;
IReadOnlyList<RppMethodInfo> constructors = targetType.Constructors;
foreach (RppMethodInfo constructor in constructors)
{
if (NeedToInferGenericArguments(targetType))
{
var genericParameters = targetType.GenericParameters;
List<RType> argTypes = ArgsTypes.ToList();
var inferredTypeArguments = InferGenericArguments(genericParameters, argTypes, constructor.Parameters.Select(p => p.Type));
if (inferredTypeArguments.Any(t => t.IsUndefined()))
{
continue;
}
RType inflatedType = targetType.MakeGenericType(inferredTypeArguments);
var matchingConstructors = FindConstructors(inflatedType);
if (matchingConstructors.Count > 1)
{
throw SemanticExceptionFactory.AmbiguousReferenceToOverloadedDefinition(Token, matchingConstructors, argTypes);
}
if (matchingConstructors.Count == 1)
{
inferredType = inflatedType;
return matchingConstructors.First();
}
}
}
throw SemanticExceptionFactory.SomethingWentWrong(Token);
}
public void TestSpecializedGenericTypesEquality()
{
// class Foo[T](val id: T)
// class SecondFoo[A](id: Int, val name: A) extends Foo[Int](id)
RType fooTy = new RType("Foo");
fooTy.DefineGenericParameters("T");
RType intFooTy = fooTy.MakeGenericType(IntTy);
RType secondTy = new RType("SecondFoo");
secondTy.DefineGenericParameters("A");
secondTy.BaseType = intFooTy;
Assert.IsTrue(secondTy.IsGenericType);
Assert.IsTrue(secondTy.IsGenericTypeDefinition);
Assert.IsTrue(intFooTy.IsAssignable(secondTy));
}
public void TestOneGenericContainerWith2DistinctClasses()
{
// class List[A]
// class Apple
// class Orange
// listOfApples = new List[Apple]()
// listOfOranges = new List[Orange]()
RType listTy = new RType("List");
listTy.DefineGenericParameters("A");
RType appleTy = new RType("Apple");
RType listOfApplesTy = listTy.MakeGenericType(appleTy);
RType orangeTy = new RType("Orange");
RType listOfOrangesTy = listTy.MakeGenericType(orangeTy);
Assert.IsFalse(listOfOrangesTy.IsAssignable(listOfApplesTy));
Assert.IsFalse(listOfApplesTy.IsAssignable(listOfOrangesTy));
Assert.IsTrue(listOfOrangesTy.IsAssignable(listOfOrangesTy));
}
public void TestAssigningNothing()
{
RType optionTy = new RType("Option");
RppGenericParameter[] genericParameters = optionTy.DefineGenericParameters("A");
genericParameters[0].Variance = RppGenericParameterVariance.Covariant;
RType nothingOptionTy = optionTy.MakeGenericType(NothingTy);
RType stringOptionTy = optionTy.MakeGenericType(StringTy);
Assert.IsTrue(stringOptionTy.IsAssignable(nothingOptionTy));
}
public void ExtendingSpecializedGenericAndDefineOneMoreGenericParameter()
{
// class Foo[T]
// class SecondFoo[A] extends Foo[Int]
// Foo[Int] = SecondFoo[String]
RType fooTy = new RType("Foo");
fooTy.DefineGenericParameters("T");
RType intFooTy = fooTy.MakeGenericType(IntTy);
RType secondFooTy = new RType("SecondFoo", RTypeAttributes.Class, intFooTy);
Assert.IsTrue(intFooTy.IsAssignable(secondFooTy));
}
/// <summary>
/// Creates 2 types, List[Fruit] and List[Apple], where:
/// <code>
/// class List[A]
/// class Fruit
/// class Apple extends Fruit
/// </code>
/// </summary>
/// <param name="variance">variance type for type argument <code>'A'</code></param>
/// <param name="listOfFruits"></param>
/// <param name="listOfApples"></param>
private static void CreateTypes(RppGenericParameterVariance variance, out RType listOfFruits, out RType listOfApples)
{
RType listTy = new RType("List");
RppGenericParameter[] genericParameters = listTy.DefineGenericParameters("A");
genericParameters[0].Variance = variance;
RType fruitTy = new RType("Fruit");
RType listOfFruitsTy = listTy.MakeGenericType(fruitTy);
RType appleTy = new RType("Apple", RTypeAttributes.Class, fruitTy);
listOfApples = listTy.MakeGenericType(appleTy);
listOfFruits = listOfFruitsTy;
}
public void InflateSimpleGeneric()
{
/*
class Foo[A,B]{
def get(x: A, y: B): B
}
*/
RType fooTy = new RType("Foo");
RppGenericParameter[] gp = fooTy.DefineGenericParameters("A", "B");
fooTy.DefineMethod("get", RMethodAttributes.Public, gp[0].Type, new[] {new RppParameterInfo(gp[0].Type), new RppParameterInfo(gp[1].Type)});
// Foo[Int, Float]
RType specializedFooTy = fooTy.MakeGenericType(IntTy, FloatTy);
// get(x: Int) : Float
RppMethodInfo getMethod = specializedFooTy.Methods[0];
Assert.AreEqual(IntTy, getMethod.ReturnType);
Assert.AreEqual(IntTy, getMethod.Parameters[0].Type);
Assert.AreEqual(FloatTy, getMethod.Parameters[1].Type);
}
public void InflateClassWithGenericBaseType()
{
/*
class Foo[A, B] {
def get(x: A) : B
}
class Bar[A, B, C] extends Foo[A, B]
{
def map(x: A, y: B) : C
}
*/
RType fooTy = new RType("Foo");
{
RppGenericParameter[] gp = fooTy.DefineGenericParameters("X", "Y");
fooTy.DefineMethod("get", RMethodAttributes.Public, gp[1].Type, new[] {new RppParameterInfo(gp[0].Type)});
}
RType barTy = new RType("Bar");
RppGenericParameter[] barGp = barTy.DefineGenericParameters("A", "B", "C");
barTy.DefineMethod("map", RMethodAttributes.Public, barGp[2].Type, new[]
{
new RppParameterInfo(barGp[0].Type),
new RppParameterInfo(barGp[1].Type)
});
barTy.BaseType = fooTy.MakeGenericType(barGp[0].Type, barGp[1].Type);
RType specilizedBarTy = barTy.MakeGenericType(IntTy, FloatTy, StringTy);
Assert.IsNotNull(specilizedBarTy.BaseType);
IReadOnlyCollection<RType> barGenericArguments = specilizedBarTy.GenericArguments;
CollectionAssert.AreEqual(new[] {IntTy, FloatTy, StringTy}, barGenericArguments.ToList());
var fooGenericArguments = specilizedBarTy.BaseType.GenericArguments;
CollectionAssert.AreEqual(new[] {IntTy, FloatTy}, fooGenericArguments.ToList());
RppMethodInfo getMethod = specilizedBarTy.BaseType.Methods[0];
Assert.AreEqual(FloatTy, getMethod.ReturnType);
Assert.AreEqual(IntTy, getMethod.Parameters[0].Type);
}
private RType SubstitutedType(RType type)
{
if (type.IsGenericParameter)
{
return GetGenericArgument(type);
}
if (type.IsGenericType)
{
RType[] mappedGenericArguments;
// Generictype definition is an RType which contains generic params
// Inflated type doesn't contain generic params but contains generic arguments
// So for RType we should use GenericParameters and for RInflatedType - GenericArguments
if (type.IsGenericTypeDefinition)
{
mappedGenericArguments = type.GenericParameters.Select(ga => _genericArguments[ga.Position]).ToArray();
}
else
{
mappedGenericArguments = type.GenericArguments.Select(ga => _genericArguments[ga.GenericParameterPosition]).ToArray();
}
var substitutedType = type.MakeGenericType(mappedGenericArguments);
return substitutedType;
}
return type;
}