Trait gstreamer::prelude::OptionSub

pub trait OptionSub<Rhs = Self, InnerRhs = Rhs> {
    type Output;

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

Trait for values and Options substraction.

Implementing this trait 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>.

Required Associated Types

type Output

The resulting inner type after applying the substraction.

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

type Output = <T as OptionSub<InnerRhs, InnerRhs>>::Output

fn opt_sub(
    self,
    rhs: &Option<InnerRhs>
) -> Option<<Option<T> as OptionSub<&'_ Option<InnerRhs>, InnerRhs>>::Output>

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

type Output = <T as OptionSub<Rhs, Rhs>>::Output

fn opt_sub(self, rhs: Rhs) -> Option<<Option<T> as OptionSub<Rhs, Rhs>>::Output>

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

type Output = <T as OptionSub<InnerRhs, InnerRhs>>::Output

fn opt_sub(
    self,
    rhs: Option<InnerRhs>
) -> Option<<Option<T> as OptionSub<Option<InnerRhs>, InnerRhs>>::Output>

Implementors

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

type Output = <T as OptionSub<InnerRhs, InnerRhs>>::Output

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

type Output = <T as OptionSub<InnerRhs, InnerRhs>>::Output

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

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