Trait TupleMapperFirst

pub trait TupleMapperFirst<Input, Output, Result>
where
    Self: Sized,
{
    // Required method
    fn map_first(self, mapper: impl Fn(Input) -> Output) -> Result;
}

Required Methods

fn map_first(self, mapper: impl Fn(Input) -> Output) -> Result

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<S, E, I, O> TupleMapperFirst<I, O, Result<(O, S), E>> for Result<(I, S), E>

fn map_first(self, mapper: impl Fn(I) -> O) -> Result<(O, S), E>

Implementors