A_RailWait

Warning: The feature described on this page has been deprecated, and will no longer be supported or updated by the ZDoom developers. While some functionality may be retained for the purposes of backwards-compatibility, authors are strongly discouraged from utilizing this feature in future maps. Compatibility with future ZDoom versions is not guaranteed.

A_RailWait

(no parameters)

Does nothing. The full sourcecode for this codepointer is merely a comment:

DEFINE_ACTION_FUNCTION(AActor, A_RailWait)
{
   // Okay, this was stupid. Just use a NULL function instead of this.
}

Therefore, do not use. It does nothing and has no reason to exist other than the possibility some old mod may have used it (in order to do nothing).