# Struct rustc_ast::ptr::P

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    pub struct P<T: ?Sized> {
        ptr: Box<T>,
    }

Expand description

An owned smart pointer.

## Fields§

§`ptr: Box<T>`

## Implementations§

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### impl<T: 'static> P<T>

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#### pub fn and_then<U, F>(self, f: F) -> U
where F: FnOnce(T) -> U,

Move out of the pointer. Intended for chaining transformations not covered by `map`.

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#### pub fn into_inner(self) -> T

Equivalent to `and_then(|x| x)`.

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#### pub fn map<F>(self, f: F) -> P<T>
where F: FnOnce(T) -> T,

Produce a new `P<T>` from `self` without reallocating.

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#### pub fn filter_map<F>(self, f: F) -> Option<P<T>>
where F: FnOnce(T) -> Option<T>,

Optionally produce a new `P<T>` from `self` without reallocating.

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### impl<T> P<[T]>

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#### pub fn new() -> P<[T]>

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#### pub fn from_vec(v: Vec<T>) -> P<[T]>

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#### pub fn into_vec(self) -> Vec<T>

## Trait Implementations§

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### impl<T> AstDeref for P<T>

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#### type Target = T

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#### fn ast_deref(&self) -> &Self::Target

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#### fn ast_deref_mut(&mut self) -> &mut Self::Target

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### impl<T: Clone> Clone for P<[T]>

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#### fn clone(&self) -> P<[T]>

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<T: 'static + Clone> Clone for P<T>

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#### fn clone(&self) -> P<T>

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<T: ?Sized + Debug> Debug for P<T>

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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<D: Decoder, T: Decodable<D>> Decodable<D> for P<[T]>

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#### fn decode(d: &mut D) -> P<[T]>

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### impl<D: Decoder, T: 'static + Decodable<D>> Decodable<D> for P<T>

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#### fn decode(d: &mut D) -> P<T>

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### impl<T> Default for P<[T]>

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#### fn default() -> P<[T]>

Creates an empty `P<[T]>`.

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### impl<T: ?Sized> Deref for P<T>

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#### type Target = T

The resulting type after dereferencing.
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#### fn deref(&self) -> &T

Dereferences the value.
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### impl<T: ?Sized> DerefMut for P<T>

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#### fn deref_mut(&mut self) -> &mut T

Mutably dereferences the value.
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### impl<T: Display> Display for P<T>

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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<T: DummyAstNode + 'static> DummyAstNode for P<T>

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#### fn dummy() -> Self

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### impl<S: Encoder, T: Encodable<S>> Encodable<S> for P<[T]>

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#### fn encode(&self, s: &mut S)

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### impl<S: Encoder, T: Encodable<S>> Encodable<S> for P<T>

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#### fn encode(&self, s: &mut S)

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### impl From<P<Ty>> for Term

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#### fn from(v: P<Ty>) -> Self

Converts to this type from the input type.
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### impl<T> From<Vec<T>> for P<[T]>

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#### fn from(v: Vec<T>) -> Self

Converts to this type from the input type.
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### impl<T> FromIterator<T> for P<[T]>

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#### fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> P<[T]>

Creates a value from an iterator. Read more
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### impl<CTX, T> HashStable<CTX> for P<T>
where T: ?Sized + HashStable<CTX>,

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#### fn hash_stable(&self, hcx: &mut CTX, hasher: &mut StableHasher)

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### impl Into<P<GenericArgs>> for AngleBracketedArgs

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#### fn into(self) -> P<GenericArgs>

Converts this type into the (usually inferred) input type.
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### impl Into<P<GenericArgs>> for ParenthesizedArgs

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#### fn into(self) -> P<GenericArgs>

Converts this type into the (usually inferred) input type.
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### impl<T> Into<Vec<T>> for P<[T]>

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#### fn into(self) -> Vec<T>

Converts this type into the (usually inferred) input type.
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### impl<'a, T> IntoIterator for &'a P<[T]>

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#### type Item = &'a T

The type of the elements being iterated over.
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#### type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?
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#### fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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### impl<T> IntoIterator for P<[T]>

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#### type Item = T

The type of the elements being iterated over.
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#### type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
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#### fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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### impl<T> Pointer for P<T>

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

Formats the value using the given formatter.

## Auto Trait Implementations§

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### impl<T: ?Sized> DynSend for P<T>
where T: DynSend,

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### impl<T: ?Sized> DynSync for P<T>
where T: DynSync,

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### impl<T: ?Sized> Freeze for P<T>

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### impl<T: ?Sized> RefUnwindSafe for P<T>
where T: RefUnwindSafe,

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### impl<T: ?Sized> Send for P<T>
where T: Send,

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### impl<T: ?Sized> Sync for P<T>
where T: Sync,

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### impl<T: ?Sized> Unpin for P<T>

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### impl<T: ?Sized> UnwindSafe for P<T>
where T: UnwindSafe,

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment = _

Alignment of `Self`.
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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> HasAttrs for T
where T: AstDeref, <T as AstDeref>::Target: HasAttrs,

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#### const SUPPORTS_CUSTOM_INNER_ATTRS: bool = const SUPPORTS_CUSTOM_INNER_ATTRS: bool = <T::Target>::SUPPORTS_CUSTOM_INNER_ATTRS;

This is `true` if this `HasAttrs` might support ‘custom’ (proc-macro) inner attributes. Attributes like `#![cfg]` and `#![cfg_attr]` are not considered ‘custom’ attributes. Read more
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#### fn attrs(&self) -> &[Attribute]

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#### fn visit_attrs(&mut self, f: impl FnOnce(&mut ThinVec<Attribute>))

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### impl<T> HasNodeId for T
where T: AstDeref, <T as AstDeref>::Target: HasNodeId,

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#### fn node_id(&self) -> NodeId

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#### fn node_id_mut(&mut self) -> &mut NodeId

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### impl<T> HasSpan for T
where T: AstDeref, <T as AstDeref>::Target: HasSpan,

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#### fn span(&self) -> Span

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### impl<T> HasTokens for T
where T: AstDeref, <T as AstDeref>::Target: HasTokens,

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#### fn tokens(&self) -> Option<&LazyAttrTokenStream>

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#### fn tokens_mut(&mut self) -> Option<&mut Option<LazyAttrTokenStream>>

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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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> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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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> ToString for T
where T: Display + ?Sized,

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#### default fn to_string(&self) -> String

Converts the given value to a `String`. 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.
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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<'a, T> Captures<'a> for T
where T: ?Sized,

## Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.