Macro frunk_core::hlist_pat

macro_rules! hlist_pat {
    {} => { ... };
    { $head:pat, $($tail:tt), +} => { ... };
    { $head:pat } => { ... };
    { $head:pat, $($tail:tt,) +} => { ... };
    { $head:pat, } => { ... };
}

Macro for pattern-matching on HLists.

Taken from https://github.com/tbu-/rust-rfcs/blob/master/text/0873-type-macros.md

Examples

let h = hlist![13.5f32, "hello", Some(41)];
let hlist_pat![h1, h2, h3] = h;
assert_eq!(h1, 13.5f32);
assert_eq!(h2, "hello");
assert_eq!(h3, Some(41));