Trait Tuple2Map0Result
tuples::tuple_map
pub trait Tuple2Map0Result<E, T0, T1> { pub fn map0<U>(self, f: impl FnOnce(T0) -> U) -> Result<(U, T1), E>; }
Mapping .0 for Tuple2
.0
pub fn map0<U>(self, f: impl FnOnce(T0) -> U) -> Result<(U, T1), E>
impl<E, T0, T1> Tuple2Map0Result<E, T0, T1> for Result<(T0, T1), E>