Enum proc_macro::Level

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#[non_exhaustive]
pub enum Level {
    Error,
    Warning,
    Note,
    Help,
}
🔬This is a nightly-only experimental API. (proc_macro_diagnostic #54140)
Expand description

An enum representing a diagnostic level.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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Error

🔬This is a nightly-only experimental API. (proc_macro_diagnostic #54140)

An error.

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Warning

🔬This is a nightly-only experimental API. (proc_macro_diagnostic #54140)

A warning.

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Note

🔬This is a nightly-only experimental API. (proc_macro_diagnostic #54140)

A note.

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Help

🔬This is a nightly-only experimental API. (proc_macro_diagnostic #54140)

A help message.

Trait Implementations§

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impl Clone for Level

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fn clone(&self) -> Level

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Level

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Copy for Level

Auto Trait Implementations§

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impl RefUnwindSafe for Level

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impl Send for Level

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impl Sync for Level

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impl Unpin for Level

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impl UnwindSafe for Level

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where 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 T
where 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.