hash-match

Optimized pattern matching alternative.

lib.rs:

Hashed match

Usage

use hash_match::{Matcher, Function};

fn branch_1(_: ()) -> &'static str {
    "branch_1"
}
fn branch_2(_: ()) -> &'static str {
    "branch_2"
}
fn branch_3(_: ()) -> &'static str {
    "branch_3"
}
fn branch_4(_: ()) -> &'static str {
    "branch_4"
}
fn branch_5(_: ()) -> &'static str {
    "branch_5"
}

fn default_branch(_: ()) -> &'static str {
    "default"
}

const MATCHER: Matcher<5, (), &'static str> = Matcher::new([
    (b"branch_1", Function(branch_1)),
    (b"branch_2", Function(branch_2)),
    (b"branch_3", Function(branch_3)),
    (b"branch_4", Function(branch_4)),
    (b"branch_5", Function(branch_5)),
], Function(default_branch));

assert_eq!(MATCHER.call(b"invalid", ()), "default");
assert_eq!(MATCHER.call(b"branch_1", ()), "branch_1");
assert_eq!(MATCHER.call(b"branch_12", ()), "default");
assert_eq!(MATCHER.call(b"branch_2", ()), "branch_2");
assert_eq!(MATCHER.call(b"branch_3", ()), "branch_3");
assert_eq!(MATCHER.call(b"branch_4", ()), "branch_4");
assert_eq!(MATCHER.call(b"branch_5", ()), "branch_5");