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Update function-newproxy-table-support

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Brad Sharp 2023-01-09 13:32:55 -08:00 • committed by GitHub
parent 2b63d682d4
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1 changed files with 5 additions and 3 deletions
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rfcs/function-newproxy-table-support
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@ -2,7 +2,7 @@
## Summary
Introduce a new way of creating `userdata` objects from Luau with an existing metatable.
Allow `newproxy` to be called with a table or nil instead of a boolean. This table (if specified) will be used as the metatable of the userdata.
## Motivation
@ -22,8 +22,10 @@ Passing a boolean to `newproxy` will continue to be supported for backwards comp
## Drawbacks
TODO: It will increase the usage of newproxy which may not be desirable.
`newproxy` was never documented in Lua 5.1 and was later removed in Lua 5.2 after support for the `__gc` metamethod was added to tables. If we make this change adoption of `newproxy` is likely to increase which may not be desirable for similar reasons that it was removed from Lua.
## Alternatives
TODO: New method entirely - add more support for userdata
### Replace newproxy with a new method
`newproxy` was never documented in Lua 5.1 and removed in Lua 5.2. Rather than improving it we could add a new method which replaces `newproxy` altogether. Since this method would be almost identical to `newproxy` and we cannot remove `newproxy` due to backwards compatability it makes sense to change the existing method rather than introduce yet another API.