Struct field_ref::FieldRefAsOptionFieldRef

pub struct FieldRefAsOptionFieldRef<T, U>(_);

A OptionFieldRef which converted from A FieldRef.

Trait Implementations

impl<'x, T, U> OptionFieldRef<'x> for FieldRefAsOptionFieldRef<T, U>

type Input = T

type Output = U

fn get<'a>(&'a self, obj: &'x Self::Input) -> Option<&'x Self::Output>

Get a reference of value in an object to which OptionFieldRef refers.

fn get_mut<'a>(
    &'a self,
    obj: &'x mut Self::Input
) -> Option<&'x mut Self::Output>

Get a mutable reference of value in an object to which OptionFieldRef refers.

fn chain<FR, R: 'x>(&self, fr: FR) -> OptionFieldRefChain<Self, FR> where
    FR: OptionFieldRef<'x, Input = Self::Output, Output = R> + Copy, 

Chains two field references.

impl<T, U> Clone for FieldRefAsOptionFieldRef<T, U>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T, U> Copy for FieldRefAsOptionFieldRef<T, U>