public static AbstractType[] FilterFromMostToLeastSpecialized(
IEnumerable <AbstractType> templateOverloads,
ResolutionContext ctxt)
{
if (templateOverloads == null)
{
return(null);
}
var so = new SpecializationOrdering {
ctxt = ctxt
};
/*
* Note: If there are functions that are specialized equally, like
* void foo(T) (T t) {} and
* void foo(T) (T t, int a) {},
* both functions have to be returned - because foo!string matches both overloads.
* Later on, in the parameter-argument-comparison, these overloads will be filtered a second time - only then,
* two overloads would be illegal.
*/
var lastEquallySpecializedOverloads = new List <AbstractType>();
var en = templateOverloads.GetEnumerator();
if (!en.MoveNext())
{
return(null);
}
var currentlyMostSpecialized = en.Current;
lastEquallySpecializedOverloads.Add(currentlyMostSpecialized);
while (en.MoveNext())
{
var evenMoreSpecialized = so.GetTheMoreSpecialized(currentlyMostSpecialized, en.Current);
if (evenMoreSpecialized == null)
{
lastEquallySpecializedOverloads.Add(en.Current);
}
else
{
currentlyMostSpecialized = evenMoreSpecialized;
lastEquallySpecializedOverloads.Clear();
lastEquallySpecializedOverloads.Add(currentlyMostSpecialized);
}
}
return(lastEquallySpecializedOverloads.ToArray());
}
public static AbstractType[] FilterFromMostToLeastSpecialized(
IEnumerable<AbstractType> templateOverloads,
ResolutionContext ctxt)
{
if (templateOverloads == null)
return null;
var so = new SpecializationOrdering { ctxt = ctxt };
/*
* Note: If there are functions that are specialized equally, like
* void foo(T) (T t) {} and
* void foo(T) (T t, int a) {},
* both functions have to be returned - because foo!string matches both overloads.
* Later on, in the parameter-argument-comparison, these overloads will be filtered a second time - only then,
* two overloads would be illegal.
*/
var lastEquallySpecializedOverloads = new List<AbstractType>();
var en = templateOverloads.GetEnumerator();
if (!en.MoveNext())
return null;
var currentlyMostSpecialized = en.Current;
lastEquallySpecializedOverloads.Add(currentlyMostSpecialized);
while(en.MoveNext())
{
var evenMoreSpecialized = so.GetTheMoreSpecialized(currentlyMostSpecialized, en.Current);
if (evenMoreSpecialized == null)
lastEquallySpecializedOverloads.Add(en.Current);
else
{
currentlyMostSpecialized = evenMoreSpecialized;
lastEquallySpecializedOverloads.Clear();
lastEquallySpecializedOverloads.Add(currentlyMostSpecialized);
}
}
return lastEquallySpecializedOverloads.ToArray();
}