private static void BoxIfGeneric(XTypeReference type, AstExpression node)
{
// TODO: CLR allows return-by-reference, though C# does not. Do we need to handle this here?
if (type.IsGenericParameter)
{
var resultType = node.GetResultType();
if (resultType.IsPrimitive)
{
var clone = new AstExpression(node);
node.SetCode(AstCode.BoxToGeneric)
.SetArguments(clone)
.Operand = type;
}
}
else if (type.IsGenericParameterArray())
{
var resultType = node.GetResultType().ElementType;
if (resultType.IsPrimitive)
{
var clone = new AstExpression(node);
node.SetCode(AstCode.BoxToGeneric).SetArguments(clone).Operand = type;
}
}
}
private static void UnboxIfGeneric(XTypeReference type, AstExpression node, XTypeSystem typeSystem)
{
if (type.IsGenericParameter || type.IsGenericParameterArray())
{
var resultType = node.GetResultType();
if (resultType.IsByReference && !type.IsByReference)
{
var elementType = resultType.ElementType;
var clone = new AstExpression(node);
node.SetCode(AstCode.SimpleCastclass).SetArguments(clone).Operand = elementType;
}
else
{
if (TreatAsStruct(type, resultType))
{
ConvertUnboxStruct(node, resultType, typeSystem);
}
else
{
var clone = new AstExpression(node);
node.SetCode(AstCode.UnboxFromGeneric).SetArguments(clone).Operand = type;
}
}
}
}
