protected virtual IList <XamlType> LookupPositionalParameters(int parameterCount)
{
if (UnderlyingType == null /* || !IsMarkupExtension*/) // see nunit tests...
{
return(null);
}
// check if there is applicable ConstructorArgumentAttribute.
// If there is, then return its type.
if (parameterCount == 1)
{
foreach (var xm in GetAllMembers())
{
var ca = xm.GetCustomAttributeProvider().GetCustomAttribute <ConstructorArgumentAttribute> (false);
if (ca != null)
{
return new XamlType [] { xm.Type }
}
;
}
}
var methods = (from m in UnderlyingType.GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance) where m.GetParameters().Length == parameterCount select m).ToArray();
if (methods.Length == 1)
{
return((from p in methods [0].GetParameters() select SchemaContext.GetXamlType(p.ParameterType)).ToArray());
}
if (SchemaContext.SupportMarkupExtensionsWithDuplicateArity)
{
throw new NotSupportedException("The default LookupPositionalParameters implementation does not allow duplicate arity of markup extensions");
}
return(null);
}
BindingFlags flags_get_static = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;