Struct std::option::NoneError[][src]

pub struct NoneError;
🔬 This is a nightly-only experimental API. (try_trait #42327)

The error type that results from applying the try operator (?) to a None value. If you wish to allow x? (where x is an Option<T>) to be converted into your error type, you can implement impl From<NoneError> for YourErrorType. In that case, x? within a function that returns Result<_, YourErrorType> will translate a None value into an Err result.

Trait Implementations

impl Clone for NoneError[src]

impl Copy for NoneError[src]

impl Debug for NoneError[src]

impl Eq for NoneError[src]

impl Hash for NoneError[src]

impl Ord for NoneError[src]

impl PartialEq<NoneError> for NoneError[src]

impl PartialOrd<NoneError> for NoneError[src]

impl StructuralEq for NoneError[src]

impl StructuralPartialEq for NoneError[src]

Auto Trait Implementations

impl RefUnwindSafe for NoneError

impl Send for NoneError

impl Sync for NoneError

impl Unpin for NoneError

impl UnwindSafe for NoneError

Blanket Implementations

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

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> From<T> for T[src]

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

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

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

The type returned in the event of a conversion error.