Trait OptionAdd 

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

    // Required method
    fn opt_add(self, rhs: Rhs) -> Option<Self::Output>;
}

Trait for values and Options addition.

Implementing this trait leads to the following auto-implementations:

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

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

Required Associated Types

type Output

The resulting inner type after applying the addition.

Required Methods

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

Computes the addition.

Returns None if at least one argument is None.

Implementations on Foreign Types

impl<T, InnerRhs> OptionAdd<&Option<InnerRhs>, InnerRhs> for Option<T>

where T: OptionOperations + OptionAdd<InnerRhs>, InnerRhs: Copy,

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

fn opt_add( self, rhs: &Option<InnerRhs>, ) -> Option<<Option<T> as OptionAdd<&Option<InnerRhs>, InnerRhs>>::Output>

impl<T, InnerRhs> OptionAdd<Option<InnerRhs>, InnerRhs> for Option<T>

where T: OptionOperations + OptionAdd<InnerRhs>,

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

fn opt_add( self, rhs: Option<InnerRhs>, ) -> Option<<Option<T> as OptionAdd<Option<InnerRhs>, InnerRhs>>::Output>

impl<T, Rhs> OptionAdd<Rhs> for Option<T>

where T: OptionOperations + OptionAdd<Rhs>,

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

fn opt_add(self, rhs: Rhs) -> Option<<Option<T> as OptionAdd<Rhs>>::Output>

Implementors

impl<T, InnerRhs> OptionAdd<&Option<InnerRhs>, InnerRhs> for T

where T: OptionOperations + OptionAdd<InnerRhs>, InnerRhs: Copy,

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

impl<T, InnerRhs> OptionAdd<Option<InnerRhs>, InnerRhs> for T

where T: OptionOperations + OptionAdd<InnerRhs>,

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

impl<T, Rhs> OptionAdd<Rhs> for T

where T: OptionOperations + Add<Rhs>,

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