Trait OptionExtensions 

pub trait OptionExtensions<T>: Sized {
    // Required methods
    fn convert<U>(self, converter: impl FnOnce(T) -> U) -> Option<U>;
    fn convert_optional<U>(
        self,
        converter: impl FnOnce(T) -> Option<U>,
    ) -> Option<U>;
    fn convert_or<U>(
        self,
        converter: impl FnOnce(T) -> U,
        fallback_converter: impl FnOnce() -> U,
    ) -> U;
    fn if_has_value(self, action: impl FnOnce(T)) -> OptionElse;
    fn value_or(self, value_selector: impl FnOnce() -> T) -> T;
    fn value_or_default(self) -> T
       where T: Default;
    fn value_or_throw<E>(
        self,
        exception_generator: impl FnOnce() -> E,
    ) -> Result<T, E>;
}

The extensions of an option (OptionExtensions on Optional<T>).

Required Methods

fn convert<U>(self, converter: impl FnOnce(T) -> U) -> Option<U>

The value converted by converter, or none (Convert(Func<TSource, TDestination>)).

fn convert_optional<U>( self, converter: impl FnOnce(T) -> Option<U>, ) -> Option<U>

The option that converter makes of the value, or none (Convert(Func<TSource, Optional<TDestination>>)).

fn convert_or<U>( self, converter: impl FnOnce(T) -> U, fallback_converter: impl FnOnce() -> U, ) -> U

The value converted by converter, or what fallback_converter makes when there is none (ConvertOr).

fn if_has_value(self, action: impl FnOnce(T)) -> OptionElse

Runs action with the value; the result runs its else_ action when there is none (IfHasValue(Action<T>)).

fn value_or(self, value_selector: impl FnOnce() -> T) -> T

The value, or what value_selector makes when there is none (ValueOr(Func<T>)).

fn value_or_default(self) -> T

where T: Default,

The value, or the default value of T (ValueOrDefault).

fn value_or_throw<E>( self, exception_generator: impl FnOnce() -> E, ) -> Result<T, E>

The value, or the error that exception_generator makes when there is none (ValueOrThrow).

Deviation (DEVIATIONS.md, DynamicData): upstream throws the exception; the port returns it as the Err of the result.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> OptionExtensions<T> for Option<T>

fn convert<U>(self, converter: impl FnOnce(T) -> U) -> Option<U>

fn convert_optional<U>( self, converter: impl FnOnce(T) -> Option<U>, ) -> Option<U>

fn convert_or<U>( self, converter: impl FnOnce(T) -> U, fallback_converter: impl FnOnce() -> U, ) -> U

fn if_has_value(self, action: impl FnOnce(T)) -> OptionElse

fn value_or(self, value_selector: impl FnOnce() -> T) -> T

fn value_or_default(self) -> T

where T: Default,

fn value_or_throw<E>( self, exception_generator: impl FnOnce() -> E, ) -> Result<T, E>

Implementors