public IType Resolve(ITypeResolveContext context)
{
if (ownerType == SymbolKind.Method)
{
IMethod method = context.CurrentMember as IMethod;
if (method != null && index < method.TypeParameters.Count)
{
return(method.TypeParameters[index]);
}
return(DummyTypeParameter.GetMethodTypeParameter(index));
}
else if (ownerType == SymbolKind.TypeDefinition)
{
ITypeDefinition typeDef = context.CurrentTypeDefinition;
if (typeDef != null && index < typeDef.TypeParameters.Count)
{
return(typeDef.TypeParameters[index]);
}
return(DummyTypeParameter.GetClassTypeParameter(index));
}
else
{
return(SpecialType.UnknownType);
}
}
static ITypeParameter GetTypeParameter(ref ITypeParameter[] typeParameters, SymbolKind symbolKind, int index)
{
ITypeParameter[] tps = typeParameters;
while (index >= tps.Length)
{
// We don't have a normal type parameter for this index, so we need to extend our array.
// Because the array can be used concurrently from multiple threads, we have to use
// Interlocked.CompareExchange.
ITypeParameter[] newTps = new ITypeParameter[index + 1];
tps.CopyTo(newTps, 0);
for (int i = tps.Length; i < newTps.Length; i++)
{
newTps[i] = new DummyTypeParameter(symbolKind, i);
}
ITypeParameter[] oldTps = Interlocked.CompareExchange(ref typeParameters, newTps, tps);
if (oldTps == tps)
{
// exchange successful
tps = newTps;
}
else
{
// exchange not successful
tps = oldTps;
}
}
return(tps[index]);
}
