public void SetGenericParameterConstraints(IEnumerable <Type> constraints)
{
ArgumentUtility.CheckNotNull("constraints", constraints);
var cons = constraints.ToList().AsReadOnly();
if (cons.Any(c => c.IsValueType || c == typeof(ValueType)))
{
throw new ArgumentException("A generic parameter cannot be constrained by a value type.", "constraints");
}
var baseTypes = cons.Where(c => c.IsClass && !c.IsGenericParameter).ToList();
if (baseTypes.Count > 1)
{
throw new ArgumentException("A generic parameter cannot have multiple base constraints.", "constraints");
}
var baseType = baseTypes.SingleOrDefault();
if (baseType != null)
{
if (_genericParameterAttributes.IsSet(GenericParameterAttributes.NotNullableValueTypeConstraint))
{
throw new ArgumentException("A generic parameter cannot have a base constraint if the NotNullableValueTypeConstraint flag is set.", "constraints");
}
SetBaseType(baseType);
}
_constraints = cons;
}
public MutableGenericParameter(
int position,
string name,
string @namespace,
GenericParameterAttributes genericParameterAttributes)
: base(name, @namespace, attributes: TypeAttributes.Public, genericTypeDefinition: null, typeArguments: EmptyTypes)
{
Assertion.IsTrue(position >= 0);
_position = position;
_genericParameterAttributes = genericParameterAttributes;
var baseType = genericParameterAttributes.IsSet(GenericParameterAttributes.NotNullableValueTypeConstraint) ? typeof(ValueType) : typeof(object);
SetBaseType(baseType);
}