Trait option_operations::sub::OptionSub

pub trait OptionSub<Rhs, InnerRhs = Rhs> {
    type Output;
    fn opt_sub(self, rhs: Rhs) -> Option<Self::Output>;
}

Trait for values and Options substraction.

Implementing this type leads to the following auto-implementations:

• OptionSub<Option<InnerRhs>> for T.
• OptionSub<Rhs> for Option<T>.
• OptionSub<Option<InnerRhs>> for Option<T>.
• … and some variants with references.

This trait is auto-implemented for OptionOperations types implementing Sub<Rhs>.

Associated Types

type Output

The resulting inner type after applying the operation.

Required methods

fn opt_sub(self, rhs: Rhs) -> Option<Self::Output>

Computes the substraction.

Returns None if at least one argument is None.

Implementations on Foreign Types

impl<T, Rhs> OptionSub<Rhs, Rhs> for Option<T> where
    T: OptionOperations + Sub<Rhs>, 

type Output = <T as Sub<Rhs>>::Output

fn opt_sub(self, rhs: Rhs) -> Option<Self::Output>

impl<T, InnerRhs> OptionSub<Option<InnerRhs>, InnerRhs> for Option<T> where
    T: OptionOperations + Sub<InnerRhs>, 

type Output = <T as Sub<InnerRhs>>::Output

fn opt_sub(self, rhs: Option<InnerRhs>) -> Option<Self::Output>

impl<T, InnerRhs> OptionSub<&'_ Option<InnerRhs>, InnerRhs> for Option<T> where
    T: OptionOperations + Sub<InnerRhs>,
    InnerRhs: Copy, 

type Output = <T as Sub<InnerRhs>>::Output

fn opt_sub(self, rhs: &Option<InnerRhs>) -> Option<Self::Output>

Implementors

impl<T, InnerRhs> OptionSub<&'_ Option<InnerRhs>, InnerRhs> for T where
    T: OptionOperations + Sub<InnerRhs>,
    InnerRhs: Copy, 

type Output = <T as Sub<InnerRhs>>::Output

impl<T, InnerRhs> OptionSub<Option<InnerRhs>, InnerRhs> for T where
    T: OptionOperations + Sub<InnerRhs>, 

type Output = <T as Sub<InnerRhs>>::Output

impl<T, Rhs> OptionSub<Rhs, Rhs> for T where
    T: OptionOperations + Sub<Rhs>, 

type Output = <T as Sub<Rhs>>::Output