# 1.29.0[−][src]Enum proc_macro::Spacing

    pub enum Spacing {
        Alone,
        Joint,
    }

Whether an `Punct` is followed immediately by another `Punct` or followed by another token or whitespace.

## Variants

`Alone`

E.g. `+` is `Alone` in `+ =`, `+ident` or `+()`.

`Joint`

E.g. `+` is `Joint` in `+=` or `'#`. Additionally, single quote `'` can join with identifiers to form lifetimes `'ident`.

## Trait Implementations

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`impl Copy for Spacing`

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`impl Clone for Spacing`

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####

`fn clone(&self) -> Spacing`

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Returns a copy of the value. Read more

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`fn clone_from(&mut self, source: &Self)`

1.0.0
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Performs copy-assignment from `source`. Read more

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`impl Debug for Spacing`

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`fn fmt(&self, f: &mut Formatter) -> Result`

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Formats the value using the given formatter. Read more

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`impl PartialEq for Spacing`

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`fn eq(&self, other: &Spacing) -> bool`

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This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

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`#[must_use] fn ne(&self, other: &Rhs) -> bool`

1.0.0
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This method tests for `!=`.

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`impl Eq for Spacing`

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## Auto Trait Implementations

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`impl Send for Spacing`

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`impl Sync for Spacing`

## Blanket Implementations

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`impl<T> From for T`

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`fn from(t: T) -> T`

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Performs the conversion.

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

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`fn into(self) -> U`

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Performs the conversion.

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

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#### `type Owned = T`

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`fn to_owned(&self) -> T`

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

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`fn clone_into(&self, target: &mut T)`

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🔬 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

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`impl<T, U> TryFrom for T where T: From<U>,`

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#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

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>`

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

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

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`fn borrow(&self) -> &T`

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Immutably borrows from an owned value. Read more

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

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`fn get_type_id(&self) -> TypeId`

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🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

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

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

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

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

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

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

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

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

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Mutably borrows from an owned value. Read more

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`impl<E> SpecializationError for E`

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`fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where T: ?Sized,`

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🔬 This is a nightly-only experimental API. (`rustc_private` #27812)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?

Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. `S` is the encoder/decoder state type, `T` is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

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`impl<T> Erased for T`

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`impl<T> Send for T where T: ?Sized,`

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`impl<T> Sync for T where T: ?Sized,`

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`impl<T> Erased for T`

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