Trait CowExt

pub trait CowExt<'a, T: ?Sized + ToOwned + 'a> {
    // Required methods
    fn map_ref_or_owned<'b, U: ?Sized + ToOwned, B, O>(
        self,
        b: B,
        o: O,
    ) -> Cow<'b, U>
       where B: FnOnce(&'a T) -> &'b U,
             O: FnOnce(T::Owned) -> U::Owned;
    fn map_to_cow<'b, U: ?Sized + ToOwned, B, O>(self, b: B, o: O) -> Cow<'b, U>
       where B: FnOnce(&'a T) -> Cow<'b, U>,
             O: FnOnce(T::Owned) -> Cow<'b, U>;
}

issue: #1958

Required Methods

fn map_ref_or_owned<'b, U: ?Sized + ToOwned, B, O>( self, b: B, o: O, ) -> Cow<'b, U>

where B: FnOnce(&'a T) -> &'b U, O: FnOnce(T::Owned) -> U::Owned,

fn map_to_cow<'b, U: ?Sized + ToOwned, B, O>(self, b: B, o: O) -> Cow<'b, U>

where B: FnOnce(&'a T) -> Cow<'b, U>, O: FnOnce(T::Owned) -> Cow<'b, U>,

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<'a, T: ?Sized + ToOwned> CowExt<'a, T> for Cow<'a, T>

fn map_ref_or_owned<'b, U: ?Sized + ToOwned, B, O>( self, b: B, o: O, ) -> Cow<'b, U>

where B: FnOnce(&'a T) -> &'b U, O: FnOnce(T::Owned) -> U::Owned,

fn map_to_cow<'b, U: ?Sized + ToOwned, B, O>(self, b: B, o: O) -> Cow<'b, U>

where B: FnOnce(&'a T) -> Cow<'b, U>, O: FnOnce(T::Owned) -> Cow<'b, U>,

Implementors