From b771393e714ff509297ac0d5e8fc5a0294c176a3 Mon Sep 17 00:00:00 2001 From: Arseny Kapoulkine Date: Thu, 11 Jun 2020 23:21:30 -0700 Subject: [PATCH] docs: Add Lua 5.1 to compatibility section --- docs/compatibility.md | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/docs/compatibility.md b/docs/compatibility.md index 4197708f..948ce209 100644 --- a/docs/compatibility.md +++ b/docs/compatibility.md @@ -28,6 +28,20 @@ Luau has certain limitations around the number of local variables, registers, up Note that Lua 5.3 has a larger upvalue limit (255) and a larger constant limit (2^26); existing Luau limits are likely sufficient for reasonable use cases. +Lua 5.1 +======= + +Since several features were removed from Lua 5.1 for sandboxing reasons, this table lists them for completeness. + +| feature | notes | +|---------|------| +| tail calls | removed to simplify implementation and make debugging and stack traces easier | +| `io`, `os`, `package` and `debug` library | note that some functions in `os`/`debug` are still present | +| `loadfile`, `dofile` | removed for sandboxing, no direct file access | +| `loadstring` bytecode and `string.dump` | exposing bytecode is dangerous for sandboxing reasons | + +Sandboxing challenges are [covered in the dedicated section](sandbox.md). + Lua 5.2 =======