Trait Tuple2Map0
tuples::tuple_map
pub trait Tuple2Map0<T0, T1> { fn map0<U>(self, f: impl FnOnce(T0) -> U) -> (U, T1); }
Mapping .0 for Tuple2
.0
fn map0<U>(self, f: impl FnOnce(T0) -> U) -> (U, T1)
impl<T0, T1> Tuple2Map0<T0, T1> for (T0, T1)