public PartialExpression TryResolveTypeExtension(Expression obj, AstIdentifier id, int?typeParamCount)
{
var name = id.Symbol;
var usings = NameResolver.TryGetUsings(Namescope, id.Source);
var staticClasses = new HashSet <DataType>();
for (var scope = Namescope; scope != null; scope = scope.Parent)
{
var ns = scope as Namespace;
if (ns != null)
{
foreach (var dt in ns.Types)
{
if (dt.IsStatic && !dt.IsGenericDefinition &&
dt.IsAccessibleFrom(id.Source))
{
staticClasses.Add(dt);
}
}
}
}
if (usings != null)
{
foreach (var ns in usings.Namespaces)
{
foreach (var dt in ns.Types)
{
if (dt.IsStatic && !dt.IsGenericDefinition &&
dt.IsAccessibleFrom(id.Source))
{
staticClasses.Add(dt);
}
}
}
foreach (var dt in usings.Types)
{
if (dt.IsStatic && !dt.IsGenericDefinition &&
dt.IsAccessibleFrom(id.Source))
{
staticClasses.Add(dt);
}
}
}
if (staticClasses.Count == 0)
{
return(null);
}
var extensionMethods = new List <Method>();
foreach (var dt in staticClasses)
{
foreach (var m in dt.Methods)
{
if (m.IsStatic &&
m.Parameters.Length > 0 && m.Parameters[0].Modifier == ParameterModifier.This &&
(typeParamCount == null || m.IsGenericDefinition && m.GenericParameters.Length == typeParamCount) &&
m.Name == name)
{
extensionMethods.Add(m);
}
}
}
if (extensionMethods.Count == 0)
{
return(null);
}
return(new PartialExtensionGroup(id.Source, obj.ActualValue, extensionMethods));
}