Debug.getupvalue

Available since: Gideros 2011.6

Description

This function returns the name and the value of the upvalue with index up of the function func. The function returns nil if there is no upvalue with the given index.

(string) (varies), = debug.getupvalue(funcup,)

'func: (function) function to look for upvalue '
'up: (number) index of the upvalue '
Returns (string) the name of upvalue
Returns (varies) the value of upvalue