//
// Does extension methods look up to find a method which matches name and extensionType.
// Search starts from this namespace and continues hierarchically up to top level.
//
public IList <MethodSpec> LookupExtensionMethod(TypeSpec extensionType, string name, int arity, ref NamespaceContainer scope)
{
List <MethodSpec> candidates = null;
foreach (Namespace n in GetUsingTable())
{
var a = n.LookupExtensionMethod(this, extensionType, name, arity);
if (a == null)
{
continue;
}
if (candidates == null)
{
candidates = a;
}
else
{
candidates.AddRange(a);
}
}
scope = parent;
if (candidates != null)
{
return(candidates);
}
if (parent == null)
{
return(null);
}
//
// Inspect parent namespaces in namespace expression
//
Namespace parent_ns = ns.Parent;
do
{
candidates = parent_ns.LookupExtensionMethod(this, extensionType, name, arity);
if (candidates != null)
{
return(candidates);
}
parent_ns = parent_ns.Parent;
} while (parent_ns != null);
//
// Continue in parent scope
//
return(parent.LookupExtensionMethod(extensionType, name, arity, ref scope));
}
//
// Does extension methods look up to find a method which matches name and extensionType.
// Search starts from this namespace and continues hierarchically up to top level.
//
public ExtensionMethodCandidates LookupExtensionMethod(TypeSpec extensionType, string name, int arity)
{
List <MethodSpec> candidates = null;
foreach (Namespace n in GetUsingTable())
{
var a = n.LookupExtensionMethod(this, extensionType, name, arity);
if (a == null)
{
continue;
}
if (candidates == null)
{
candidates = a;
}
else
{
candidates.AddRange(a);
}
}
if (candidates != null)
{
return(new ExtensionMethodCandidates(candidates, this));
}
if (parent == null)
{
return(null);
}
Namespace ns_scope;
var ns_candidates = ns.Parent.LookupExtensionMethod(this, extensionType, name, arity, out ns_scope);
if (ns_candidates != null)
{
return(new ExtensionMethodCandidates(ns_candidates, this, ns_scope));
}
//
// Continue in parent container
//
return(parent.LookupExtensionMethod(extensionType, name, arity));
}
