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docs: Add Lua 5.1 to compatibility section

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Arseny Kapoulkine 2020-06-11 23:21:30 -07:00
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docs/compatibility.md
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@ -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
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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
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