pub struct OptionalError(_);
Expand description

Represents an Option<syn::Error>.

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impl OptionalError

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pub fn new(error: Error) -> Self

Create a new OptionalError with the given error.

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pub fn error(&self) -> Option<&Error>

Returns a reference to the contained error, if any.

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pub fn error_mut(&mut self) -> Option<&mut Error>

Returns a mutable reference to the contained error, if any.

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pub fn take(&mut self) -> Option<Error>

Removes the contained error and returns it, if any.

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pub fn replace(&mut self, error: Error) -> Option<Error>

Replaces the contained error with the given one.

Returns the previous error, if any.

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pub fn combine(&mut self, error: Error)

Combine the given error with the existing one, initializing it if none currently exists.

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pub fn try_throw(self) -> Result<(), Error>

Returns a Result with the contained error, if any.

This can be used for quick and easy early returns.

Trait Implementations§

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impl Default for OptionalError

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fn default() -> OptionalError

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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,

const: unstable · source§

fn borrow(&self) -> &T

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

const: unstable · source§

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

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source§

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, 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.
const: unstable · source§

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.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.