Macro frunk_core::Coprod
source · macro_rules! Coprod { () => { ... }; (...$Rest:ty) => { ... }; ($A:ty) => { ... }; ($A:ty, $($tok:tt)*) => { ... }; }
Expand description
Returns a type signature for a Coproduct of the provided types
This is a type macro (introduced in Rust 1.13) that makes it easier to write nested type signatures.
§Examples
use frunk_core::Coprod;
type I32Bool = Coprod!(i32, bool);
let co1 = I32Bool::inject(3);
// Use ...Tail to append another coproduct at the end.
let co2 = <Coprod!(&str, String, ...I32Bool)>::inject(3);
Run