[−][src]Trait wyz::tap::TapOption

pub trait TapOption<T: Sized>: Sized {
    fn tap_some<F: FnOnce(&T) -> R, R>(self, func: F) -> Self;

    fn tap_some_mut<F: FnOnce(&mut T) -> R, R>(self, func: F) -> Self;

    fn tap_none<F: FnOnce() -> R, R>(self, func: F) -> Self;

    fn tap_some_dbg<F: FnOnce(&T) -> R, R>(self, func: F) -> Self { ... }

    fn tap_some_mut_dbg<F: FnOnce(&mut T) -> R, R>(self, func: F) -> Self { ... }

    fn tap_none_dbg<F: FnOnce() -> R, R>(self, func: F) -> Self { ... }
}

Optional Tap

This trait allows conditional tapping of Option wrappers. The methods only invoke their provided function, on the inner type, if the Option has the correct outer variant.

Required methods

fn tap_some<F: FnOnce(&T) -> R, R>(self, func: F) -> Self

Provides the interior value for inspection if present.

This is equivalent to .map(|v| { func(&v); v }).

fn tap_some_mut<F: FnOnce(&mut T) -> R, R>(self, func: F) -> Self

Provides the interior value for modification if present.

This is equivalent to .map(|mut v| { func(&mut v); v }).

fn tap_none<F: FnOnce() -> R, R>(self, func: F) -> Self

Runs the provided function if the Option is empty.

This is equivalent to .or_else(|| { func(); None }).

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Provided methods

fn tap_some_dbg<F: FnOnce(&T) -> R, R>(self, func: F) -> Self

Calls tap_some in debug builds, and does nothing in release builds.

fn tap_some_mut_dbg<F: FnOnce(&mut T) -> R, R>(self, func: F) -> Self

Calls tap_some_mut in debug builds, and does nothing in release builds.

fn tap_none_dbg<F: FnOnce() -> R, R>(self, func: F) -> Self

Calls tap_none in debug builds, and does nothing in release builds.

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Implementations on Foreign Types

impl<T> TapOption<T> for Option<T>[src]

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Implementors

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