private static IEnumerable <ITypeInfo> GetReferencedEnums(ITypeLib typeLib, ITypeInfo typeInfo, Dictionary <Guid, ITypeInfo> processedTypeInfo)
{
if (typeInfo == null)
{
yield break;
}
var guid = typeInfo.GetOrCreateGuid();
if (processedTypeInfo.ContainsKey(guid))
{
yield break;
}
processedTypeInfo.Add(guid, typeInfo);
if (typeInfo.IsEnum())
{
yield return(typeInfo);
yield break;
}
if (typeInfo.GetContainingTypeLib().GetGuid() != typeLib.GetGuid())
{
yield break;
}
using (var typeAttrScope = typeInfo.CreateAttrScope())
{
for (var funcIndex = 0; funcIndex < typeAttrScope.Value.cFuncs; funcIndex++)
{
using (var funcDescScope = typeInfo.CreateFuncDescScope(funcIndex))
{
foreach (var enumTypeInfo in GetReferencedEnums(typeLib, typeInfo, funcDescScope.Value, processedTypeInfo))
{
yield return(enumTypeInfo);
}
}
}
for (var varIndex = 0; varIndex < typeAttrScope.Value.cVars; varIndex++)
{
using (var varDescScope = typeInfo.CreateVarDescScope(varIndex))
{
foreach (var enumTypeInfo in GetReferencedEnums(typeLib, typeInfo, varDescScope.Value, processedTypeInfo))
{
yield return(enumTypeInfo);
}
}
}
for (var implTypeIndex = 0; implTypeIndex < typeAttrScope.Value.cImplTypes; implTypeIndex++)
{
typeInfo.GetRefTypeOfImplType(implTypeIndex, out var href);
typeInfo.GetRefTypeInfo(href, out var refTypeInfo);
var refGuid = refTypeInfo.GetGuid();
if ((refGuid == typeof(IDispatch).GUID) || (refGuid == typeof(IDispatchEx).GUID))
{
continue;
}
foreach (var enumTypeInfo in GetReferencedEnums(typeLib, refTypeInfo, processedTypeInfo))
{
yield return(enumTypeInfo);
}
}
}
}