Really? I was under the impression it wanted an _expression_ list
(of which it uses only the first three items). In which case I don't
see the ambiguity between __call and __in (or whatever it could
At the syntax level (dare I call it the language lawyer level?)
you are right, of course. But what Lua does to the first of those
expressions is to try to call it.
Lua 5.2.2 Copyright (C) 1994-2013 Lua.org, PUC-Rio
for k in 3 do print(k) endstdin:1: attempt to call a number value
Urgh .. what a mess. That's certainly not what the Lua Ref manual says, and is not consistent with other places that _expression_ lists are used.