Simple implementation of "Switch-Case" and "Try-Catch" statements for Lua. For usage, see screenshot: https://i.imgur.com/SFC4wGj.png

switch-case_statement.lua

local setmetatable = setmetatable

Default, Nil = {}, function() end
switch = function(i)
    return setmetatable({ i }, {
        __call = function(t, cases)
            local item = #t < 1 and Nil or t[1]
            return (cases[item] or cases[Default] or Nil)(item)
        end
    })
end

try-catch_statement.lua

local pcall = pcall
local type = type

catch = function(exception_handler) return exception_handler[1] end

try = function(what)
    local status, result = pcall(what[1])
    if status then return result end
    return type(what[2]) == "function" and what[2](result) or nil
end