Struct EnumFieldRef

pub struct EnumFieldRef<E, T> { /* private fields */ }

A OptionFieldRef references a field within an enum constant.

Implementations

impl<E, T> EnumFieldRef<E, T>

pub fn new( extractor: fn(&E) -> Option<&T>, mut_extractor: fn(&mut E) -> Option<&mut T>, ) -> Self

Creates a new EnumFieldRef from a field extracting function and a mutable field extracting function.

Trait Implementations

impl<E, T> Clone for EnumFieldRef<E, T>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'x, E: 'x, T: 'x> OptionFieldRef<'x> for EnumFieldRef<E, T>

type Input = E

type Output = T

fn get<'a>(&'a self, e: &'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, e: &'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<E, T> Copy for EnumFieldRef<E, T>