On Thursday, 26 September 2024 at 06:53:12 UTC, Per Nordlöw wrote:
Should a function like
```d
uint parseHex(in char ch) pure nothrow @safe @nogc {
switch (ch) {
case '0': .. case '9':
return ch - '0';
case 'a': .. case 'f':
return 10 + ch - 'a';
case 'A': .. case 'F':
return 10 + ch - 'A';
default:
assert(0, "Non-hexadecimal character");
}
}
```
instead return an ubyte?
I have no conclusive answer:
- From an ABI PoV that does not matter, it's AL vs EAX , i.e same
"parent" register.
- From a self-documenting PoV I'd use ubyte. But then you hit the
problem of promotion of `ch - ...` and you have to cast each of
them.
