RFC: Function Calls with Named Arguments

[matlneus]

Rendered

This RFC proposes adding optional named arguments to Luau function calls, allowing arguments to be specified by parameter name rather than position.

(I liked @Wunder-Wulfe's idea in #91 (comment))

[jackdotink]

I do not think it is possible to implement this into the VM in any way that is actually any good. It will always be equivalent to or worse than passing a table, so you should probably just pass a table.

[matlneus]

I do not think it is possible to implement this into the VM in any way that is actually any good. It will always be equivalent to or worse than passing a table, so you should probably just pass a table.

I don't think any changes need to be made to the VM for the idea this RFC proposes, because at least for now, named arguments would be resolved at compile-time, not at run-time.

Also, I don't really see how it'd be worse than a table. It could be equivalent if it were just syntax sugar for table arguments, but I don't see how it could be worse. I'm inclined to believe that creating tables in loops or hot paths would lead to bad performance, but this could be benchmarked.