Macro implement_const_unary

macro_rules! implement_const_unary {
    (
        @overflowing
        name: $name:ident,
        method: $method:ident,
        string: $str:expr,
        patterns: [$([$type:ident, $m_type:ty]),+]
    ) => { ... };
    (
        @non-overflowing
        name: $name:ident,
        method: $method:ident,
        patterns: [$([$type:ident, $m_type:ty]),+]
    ) => { ... };
    (
        name: $name:ident,
        patterns: [$([
            t: $type:ident,
            l: $logic:expr
        ]),+]
    ) => { ... };
}