replacing if-then-else strcmp ladders with switch cases

[Valdis Kl=?utf-8?Q?=c4=93?=tnieks]

On Fri, 12 Jun 2020 12:05:55 -0600, jim.cromie at gmail.com said:
> considering  lib/dynamic_debug.c
> we have
>
> ...
> } else if (!strcmp(words[i], "module")) {
>     rc = check_set(&query->module, words[i+1], "module");
> } else if (!strcmp(words[i], "format")) {
> ...
>
> are there any built-in hash functions which would allow this ?
>
> switch (keyword) {
> case Hash("module"):
>     ..... break;
> case Hash("format"):
>     .... break;
> default: return -EINVAL
> }

There's hash functions.  But they're all cryptographic hashes that return
things that are far too many bits to use as the index of a switch.

Also, you have the problem that the cases of a switch have to be something
that can be evaluated at compile time....
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