Re: Lua 5.4 Tuples FTW!

[Thomas Jericke <tjericke@...>]

On 16.03.2018 00:37, Duane Leslie wrote:

Hi,

A quick and dirty tuple implementation using the new multi-uservalue
userdata implementation.

The problem I see, is that you don't get raw equality with any userdata implementation of tuples. So I cannot use them as table keys.
For example I cannot use tuples to index a matrix.

t = {}
t[tuple(2,2)] = 42
print(tuple(2,2)) -- prints nil

Also they are passed by reference and not by value. That can be confusing once you edit a value in that tuple.
--
Thomas