public override void ValidateConstraintForType(TypeVariableReference type, ITypeUnificationResult unificationResult)
{
if (!type.Lifetime.DoesOutlastLifetimeGraph(_lifetimeGraph))
{
unificationResult.AddFailedTypeConstraint(this);
}
}
public override void ValidateConstraintForType(TypeVariableReference type, ITypeUnificationResult unificationResult)
{
if (!type.RenderNIType().TypeHasDisplayTrait())
{
unificationResult.AddFailedTypeConstraint(this);
}
}
public override void ValidateConstraintForType(TypeVariableReference type, ITypeUnificationResult unificationResult)
{
NIType implementedIteratorInterface;
// TODO: using NITypes here to destructure the iterator interface and reconstruct a TypeReference for the item type
// is an incomplete solution; it will not work for item types that have bounded lifetimes. Also, currently there's
// no way to create TypeReferences for non-reference types that have bounded lifetimes, as an iterator implementation
// whose items are references will necessarily have.
//
// What is needed is a way of defining a generic parameterized TypeVariableReference, and then a reference to a specialization of that type.
// Then, as long as the parameterized type can include an interface implementation, we should be able to get the specialized
// interface implementation from the specialization.
if (type.RenderNIType().TryGetImplementedIteratorInterface(out implementedIteratorInterface))
{
NIType itemType;
implementedIteratorInterface.TryDestructureIteratorType(out itemType);
TypeVariableReference itemTypeReference = type.TypeVariableSet.CreateTypeVariableReferenceFromNIType(
itemType,
new Dictionary <NIType, TypeVariableReference>());
type.TypeVariableSet.Unify(_itemTypeVariable, itemTypeReference, unificationResult);
}
else
{
unificationResult.AddFailedTypeConstraint(this);
}
}
public override void ValidateConstraintForType(TypeVariableReference type, ITypeUnificationResult unificationResult)
{
// TODO: probably not great to render an NIType at this stage
if (!type.RenderNIType().WireTypeMayFork())
{
unificationResult.AddFailedTypeConstraint(this);
}
}