Trait option_operations::eq::OptionEq

pub trait OptionEq<Rhs, InnerRhs = Rhs> {
    fn opt_eq(&self, other: Rhs) -> Option<bool>;

    fn opt_ne(&self, other: Rhs) -> Option<bool> { ... }
}

Trait for the equality OptionOperations.

Required methods

fn opt_eq(&self, other: Rhs) -> Option<bool>

Tests whether self is equal to other.

Returns None if they can’t be compared, e.g. if at most one argument is None.

Provided methods

fn opt_ne(&self, other: Rhs) -> Option<bool>

Tests whether self is not equal to other.

Returns None if they can’t be compared, e.g. if at most one argument is None.

Implementations on Foreign Types

impl<T, Rhs> OptionEq<&'_ Rhs, Rhs> for Option<T> where
    T: OptionOperations + for<'a> OptionEq<&'a Rhs, Rhs>, 

fn opt_eq(&self, rhs: &Rhs) -> Option<bool>

impl<T, Rhs> OptionEq<Rhs, Rhs> for Option<T> where
    T: OptionOperations + for<'a> OptionEq<&'a Rhs, Rhs>, 

fn opt_eq(&self, rhs: Rhs) -> Option<bool>

impl<T, InnerRhs> OptionEq<&'_ Option<InnerRhs>, InnerRhs> for Option<T> where
    T: OptionOperations + for<'a> OptionEq<&'a InnerRhs, InnerRhs>, 

fn opt_eq(&self, rhs: &Option<InnerRhs>) -> Option<bool>

impl<T, InnerRhs> OptionEq<Option<InnerRhs>, InnerRhs> for Option<T> where
    T: OptionOperations + for<'a> OptionEq<&'a InnerRhs, InnerRhs>, 

fn opt_eq(&self, rhs: Option<InnerRhs>) -> Option<bool>

Implementors

impl<T, InnerRhs> OptionEq<&'_ Option<InnerRhs>, InnerRhs> for T where
    T: OptionOperations + for<'a> OptionEq<&'a InnerRhs, InnerRhs>, 

impl<T, InnerRhs> OptionEq<Option<InnerRhs>, InnerRhs> for T where
    T: OptionOperations + for<'a> OptionEq<&'a InnerRhs, InnerRhs>, 

impl<T, Rhs> OptionEq<&'_ Rhs, Rhs> for T where
    T: OptionOperations + PartialEq<Rhs>, 

impl<T, Rhs> OptionEq<Rhs, Rhs> for T where
    T: OptionOperations + for<'a> OptionEq<&'a Rhs, Rhs>,