Trait Tuple2Map0Result 

pub trait Tuple2Map0Result<E, T0, T1> {
    // Required method
    fn map0<U>(self, f: impl FnOnce(T0) -> U) -> Result<(U, T1), E>;
}

Mapping .0 for Tuple2

Required Methods

fn map0<U>(self, f: impl FnOnce(T0) -> U) -> Result<(U, T1), E>

Mapping .0 for Tuple2

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<E, T0, T1> Tuple2Map0Result<E, T0, T1> for Result<(T0, T1), E>

fn map0<U>(self, f: impl FnOnce(T0) -> U) -> Result<(U, T1), E>

Implementors