public void ImportOpenGenericType()
{
// class C<T, U> { void M<X>() {} }
var c = new DefaultUnresolvedTypeDefinition(string.Empty, "C");
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 0, "T"));
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 1, "U"));
var m = new DefaultUnresolvedMethod(c, "M");
m.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.Method, 0, "X"));
c.Members.Add(m);
var resolvedC1 = TypeSystemHelper.CreateCompilationAndResolve(c);
var resolvedM1 = resolvedC1.Methods.Single(method => method.Name == "M");
var resolvedC2 = TypeSystemHelper.CreateCompilationAndResolve(c);
var resolvedM2 = resolvedC2.Methods.Single(method => method.Name == "M");
// the types, methods and type parameters differ in the two compilations:
Assert.AreNotEqual(resolvedC1, resolvedC2);
Assert.AreNotEqual(resolvedM1, resolvedM2);
Assert.AreNotEqual(resolvedC1.TypeParameters[1], resolvedC2.TypeParameters[1]);
Assert.AreNotEqual(resolvedM1.TypeParameters[0], resolvedM2.TypeParameters[0]);
// C<U, X>
var pt1 = new ParameterizedType(resolvedC1, new[] { resolvedC1.TypeParameters[1], resolvedM1.TypeParameters[0] });
var pt2 = (ParameterizedType)resolvedC2.Compilation.Import(pt1);
// importing resulted in C<U, X> in the new compilation:
Assert.AreEqual(resolvedC2, pt2.GetDefinition());
Assert.AreEqual(resolvedC2.TypeParameters[1], pt2.TypeArguments[0]);
Assert.AreEqual(resolvedM2.TypeParameters[0], pt2.TypeArguments[1]);
}
public void EmptyClassHasToString()
{
DefaultUnresolvedTypeDefinition c = new DefaultUnresolvedTypeDefinition(string.Empty, "C");
var resolvedC = TypeSystemHelper.CreateCompilationAndResolve(c);
Assert.AreEqual("System.Object.ToString", resolvedC.GetMethods(m => m.Name == "ToString").Single().FullName);
}
public void ClassDerivingFromItself()
{
// class C : C {}
var c = new DefaultUnresolvedTypeDefinition(string.Empty, "C");
c.BaseTypes.Add(c);
ITypeDefinition resolvedC = TypeSystemHelper.CreateCompilationAndResolve(c);
Assert.AreEqual(new [] { resolvedC }, resolvedC.GetAllBaseTypes().ToArray());
}
public void TypeParameterDerivingFromOtherTypeParameterInheritsEffectiveBaseClass()
{
// class C<T, U> where T : List<string> where U : T
var c = new DefaultUnresolvedTypeDefinition(string.Empty, "C");
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 0, "T")
{
Constraints = { typeof(List <string>).ToTypeReference() }
});
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 1, "U")
{
Constraints = { new TypeParameterReference(SymbolKind.TypeDefinition, 0) }
});
ITypeDefinition resolvedC = TypeSystemHelper.CreateCompilationAndResolve(c);
Assert.AreEqual(true, resolvedC.TypeParameters[0].IsReferenceType);
Assert.AreEqual(true, resolvedC.TypeParameters[1].IsReferenceType);
Assert.AreEqual("System.Collections.Generic.List`1[[System.String]]", resolvedC.TypeParameters[0].EffectiveBaseClass.ReflectionName);
Assert.AreEqual("System.Collections.Generic.List`1[[System.String]]", resolvedC.TypeParameters[1].EffectiveBaseClass.ReflectionName);
}
public void TypeParameterDerivingFromOtherTypeParameterDoesNotInheritReferenceConstraint()
{
// class C<T, U> where T : class where U : T
var c = new DefaultUnresolvedTypeDefinition(string.Empty, "C");
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 0, "T")
{
HasReferenceTypeConstraint = true
});
c.TypeParameters.Add(new DefaultUnresolvedTypeParameter(SymbolKind.TypeDefinition, 1, "U")
{
Constraints = { new TypeParameterReference(SymbolKind.TypeDefinition, 0) }
});
ITypeDefinition resolvedC = TypeSystemHelper.CreateCompilationAndResolve(c);
// At runtime, we might have T=System.ValueType and U=int, so C# can't inherit the 'class' constraint
// from one type parameter to another.
Assert.AreEqual(true, resolvedC.TypeParameters[0].IsReferenceType);
Assert.IsNull(resolvedC.TypeParameters[1].IsReferenceType);
}