#[repr(transparent)]
pub(crate) struct NeverShortCircuit<T>(pub T);
Expand description

An adapter for implementing non-try methods via the Try implementation.

Conceptually the same as Result<T, !>, but requiring less work in trait solving and inhabited-ness checking and such, by being an obvious newtype and not having From bounds lying around.

Not currently planned to be exposed publicly, so just pub(crate).

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§0: T

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impl<T> NeverShortCircuit<T>

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pub fn wrap_mut_1<A>( f: impl FnMut(A) -> T ) -> impl FnMut(A) -> NeverShortCircuit<T>

Wraps a unary function to produce one that wraps the output into a NeverShortCircuit.

This is useful for implementing infallible functions in terms of the try_ ones, without accidentally capturing extra generic parameters in a closure.

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pub fn wrap_mut_2<A, B>(f: impl FnMut(A, B) -> T) -> impl FnMut(A, B) -> Self

Trait Implementations§

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impl<T> FromResidual<<NeverShortCircuit<T> as Try>::Residual> for NeverShortCircuit<T>

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fn from_residual(never: NeverShortCircuitResidual) -> Self

🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
Constructs the type from a compatible Residual type. Read more
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impl<T> Try for NeverShortCircuit<T>

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type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
The type of the value produced by ? when not short-circuiting.
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type Residual = NeverShortCircuitResidual

🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
The type of the value passed to FromResidual::from_residual as part of ? when short-circuiting. Read more
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fn branch(self) -> ControlFlow<NeverShortCircuitResidual, T>

🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
Used in ? to decide whether the operator should produce a value (because this returned ControlFlow::Continue) or propagate a value back to the caller (because this returned ControlFlow::Break). Read more
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fn from_output(x: T) -> Self

🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
Constructs the type from its Output type. Read more

Auto Trait Implementations§

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impl<T> Freeze for NeverShortCircuit<T>where T: Freeze,

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impl<T> RefUnwindSafe for NeverShortCircuit<T>where T: RefUnwindSafe,

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impl<T> Send for NeverShortCircuit<T>where T: Send,

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impl<T> Sync for NeverShortCircuit<T>where T: Sync,

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impl<T> Unpin for NeverShortCircuit<T>where T: Unpin,

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impl<T> UnwindSafe for NeverShortCircuit<T>where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> SizedTypeProperties for T

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const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.