Language Reference

tokimun toki mun its lua, but like, doesn’t make you want to pull your hair out.

tokimun compiles to plain lua. that means you can use it anywhere lua runs: LuaJIT, Lua 5.1–5.4, Roblox Luau, LÖVE, whatever. write tokimun, get lua out the other end.

file extension: .tkm

Indexing

0-based. like a normal language.

arr = {"a", "b", "c"}
print(arr[0])  -- "a"
print(arr[1])  -- "b"
print(arr[2])  -- "c"

this applies everywhere: array access, ipairs, string functions, all of it.

Variables & Scoping

variables are local by default.

x = 10        -- this is local
global y = 20 -- this is global

if you forget global, it’s local. this is the opposite of lua. you’re welcome.

Operators

not equal

!= works. ~= also still works if you’re a lua purist for some reason.

if x != 5 then
  print("not five")
end

compound assignment

x += 1
x -= 1
x *= 2
x /= 2
x %= 3
s ..= "more text"

these compile to x = x + 1, etc. nothing fancy.

null coalescing

?? returns the right side if the left is nil.

name = input ?? "anonymous"

compiles to something like local name = input ~= nil and input or "anonymous" but handles the falsy edge cases properly.

optional chaining

?. short-circuits if anything in the chain is nil.

zip = user?.address?.zipcode

if user is nil, or user.address is nil, you get nil back instead of an error.

Numbers

all of these work:

dec = 42
hex = 0x2A
bin = 0b101010
oct = 0o52

they all equal 42. hex is already in lua, we’re just adding binary and octal because it’s already [insert year here].

Strings & Templates

backtick strings with ${} interpolation:

name = "mun"
greeting = `hello ${name}!`
print(greeting)  -- "hello mun!"

expressions work too:

print(`2 + 2 = ${2 + 2}`)  -- "2 + 2 = 4"

regular "strings" and 'strings' and [[multiline strings]] still work the same as lua.

Control Flow

continue

wow, it exists now.

for i = 0, 9 do
  if i % 2 == 0 then
    continue
  end
  print(i)  -- prints 1, 3, 5, 7, 9
end

switch statements

these are made with implicit fallthrough prevention by default. which you can just use ‘countinue’ to get fallthrough if you want it.

switch status
  case "ok":
    print("all good")
  case "error", "fail":
    print("something went wrong")
  default:
    print("unknown status")
end

compiles to an if/elseif chain under the hood.

Tables

same as lua, but 0-indexed.

t = {
  "first",   -- t[0]
  "second",  -- t[1]
  name = "tokimun",  -- t.name (string keys unchanged)
}

trailing commas are allowed everywhere:

t = {
  "a",
  "b",
  "c",  -- no angry compiler
}

Functions

same as lua, nothing changed here.

function greet(name)
  return `hello ${name}`
end

-- or
greet = function(name)
  return `hello ${name}`
end

Lua Interop

tokimun compiles to standard lua. array indices are automatically offset by 1 during compilation, so lua libraries just work.

you write arr[0], it compiles to arr[1]. you never have to think about it.

That’s It

tokimun toki mun is small on purpose. its still lua. but with the bullshit removed.