public ResolveResult ResolveIndexer(ResolveResult target, ResolveResult[] arguments, string[] argumentNames = null)
{
switch (target.Type.Kind) {
case TypeKind.Dynamic:
return new DynamicInvocationResolveResult(target, DynamicInvocationType.Indexing, AddArgumentNamesIfNecessary(arguments, argumentNames));
case TypeKind.Array:
case TypeKind.Pointer:
// §7.6.6.1 Array access / §18.5.3 Pointer element access
AdjustArrayAccessArguments(arguments);
return new ArrayAccessResolveResult(((TypeWithElementType)target.Type).ElementType, target, arguments);
}
// §7.6.6.2 Indexer access
MemberLookup lookup = CreateMemberLookup();
var indexers = lookup.LookupIndexers(target);
if (arguments.Any(a => a.Type.Kind == TypeKind.Dynamic)) {
// If we have dynamic arguments, we need to represent the invocation as a dynamic invocation if there is more than one applicable indexer.
var or2 = CreateOverloadResolution(arguments, argumentNames, null);
var applicableIndexers = indexers.SelectMany(x => x).Where(m => OverloadResolution.IsApplicable(or2.AddCandidate(m))).ToList();
if (applicableIndexers.Count > 1) {
return new DynamicInvocationResolveResult(target, DynamicInvocationType.Indexing, AddArgumentNamesIfNecessary(arguments, argumentNames));
}
}
OverloadResolution or = CreateOverloadResolution(arguments, argumentNames);
or.AddMethodLists(indexers);
if (or.BestCandidate != null) {
return or.CreateResolveResult(target);
} else {
return ErrorResult;
}
}