proc_macro::Level - Rust
Description: API documentation for the Rust `Level` enum in crate `proc_macro`.
Keywords: rust, rustlang, rust-lang, Level

# [−][src]Enum proc_macro::Level

    #[non_exhaustive]pub enum Level {
        Error,
        Warning,
        Note,
        Help,
    }

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

An enum representing a diagnostic level.

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

An error.

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

A warning.

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

A note.

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

A help message.

## Trait Implementations

### `impl Clone for Level`[src]

#### `fn clone(&self) -> Level`[src]

Returns a copy of the value. Read more

#### `fn clone_from(&mut self, source: &Self)`1.0.0[src]

Performs copy-assignment from `source`. Read more

### `impl Copy for Level`[src]

### `impl Debug for Level`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

Formats the value using the given formatter. Read more

## Auto Trait Implementations

### `impl RefUnwindSafe for Level`

### `impl Send for Level`

### `impl Sync for Level`

### `impl Unpin for Level`

### `impl UnwindSafe for Level`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `fn type_id(&self) -> TypeId`[src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `fn borrow(&self) -> &T`[src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `fn borrow_mut(&mut self) -> &mut T`[src]

Mutably borrows from an owned value. Read more

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

#### `fn from(t: T) -> T`[src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `fn into(self) -> U`[src]

Performs the conversion.

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

The resulting type after obtaining ownership.

#### `fn to_owned(&self) -> T`[src]

Creates owned data from borrowed data, usually by cloning. Read more

#### `fn clone_into(&self, target: &mut T)`[src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`[src]

Performs the conversion.