The luau branch has a working version of LÖVR that uses Luau instead of LuaJIT. You can run stuff like this:

function lovr.load()
  local a: number = 1_000
  a += 1
  print(`a is {a}`)
end

This issue is meant to track/discuss the status of Luau in LÖVR. Luau has many differences from both Lua and LuaJIT, and some things are missing and/or broken. There are also interesting things about Luau that remain to be explored, like experimenting with its vectors and integrating with tooling for typechecking.

Known issues:

• require doesn't exist
• os.getenv doesn't exist (decided to leave as-is)
• collectgarbage doesn't exist (should polyfill, see this, remove hack from test/conf.lua once finished)
• Plugins don't work (lovr-http and lua-enet fork could be updated to support luau?)

Pending investigations:

• Vectors (integrating into lovr.math's vector API, performance, 3 vs. 4 component vectors)
• Does it work on WebAssembly?
• Test on Android
• Should LÖVR also support .luau file extensions? (Added)
• Native code generation
• Imports/sandboxing
• __namecall optimization
• Should we be using lua_newuserdatadtor and/or tagged userdata?