lua safe getOutput POC

[dynfer]

#716
#607

[mck1117]

discussed offline:

• make the switch look up by hash, like

switch (hash(inputStr)) {
case hash(“foo”): return fooVar;
}

(I think this is legal if the hash is constexpr)

• rename to getChannel as it's not just outputs

[mck1117]

yup that strategy works: https://godbolt.org/z/5h4vz51hn

It makes the compiler generate a jump table similar to what you have implemented here.