Constexpr Attribute

Pluto adds the <constexpr> attribute which is a strengthened version of the <const> attribute.

So, both of these lines of code are valid and mean the same thing:

local a <const> = 123
local a <constexpr> = 123

However, <constexpr> also enforces that the assigned variable is a compile-time constant:

local a <const> = {}
local a <constexpr> = {} -- <constexpr> variable was not assigned a compile-time constant value