Macro truthy::truthy

macro_rules! truthy {
    ( ! $( $tokens:tt )+ ) => { ... };
    ( ( $( $tokens:tt )+ ) ) => { ... };
    ( ( $( $tokens:tt )+ ) && $( $remainder:tt )+ ) => { ... };
    ( ( $( $tokens:tt )+ ) || $( $remainder:tt )+ ) => { ... };
    ( $i:ident ) => { ... };
    ( $i:ident && $($remainder:tt)+ ) => { ... };
    ( $i:ident || $($remainder:tt)+ ) => { ... };
}

Convenience macro for evaluating truthiness.

Helps avoid repeatedly typing .truthy() in a long boolean chain.

assert_eq!(x.truthy() && (y.truthy() || !z.truthy()), truthy!(x && (y || !z)));