Struct rustc_ast::ast::Pat

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pub struct Pat {
    pub id: NodeId,
    pub kind: PatKind,
    pub span: Span,
    pub tokens: Option<LazyAttrTokenStream>,
}
Expand description

A match pattern.

Patterns appear in match statements and some other contexts, such as let and if let.

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§id: NodeId§kind: PatKind§span: Span§tokens: Option<LazyAttrTokenStream>

Implementations§

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impl Pat

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pub fn to_ty(&self) -> Option<P<Ty>>

Attempt reparsing the pattern as a type. This is intended for use by diagnostics.

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pub fn walk(&self, it: &mut impl FnMut(&Pat) -> bool)

Walk top-down and call it in each place where a pattern occurs starting with the root pattern walk is called on. If it returns false then we will descend no further but siblings will be processed.

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pub fn is_rest(&self) -> bool

Is this a .. pattern?

Trait Implementations§

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impl Clone for Pat

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fn clone(&self) -> Pat

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 Pat

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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> Decodable<__D> for Pat

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fn decode(__decoder: &mut __D) -> Self

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impl DummyAstNode for Pat

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fn dummy() -> Self

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impl<__E: Encoder> Encodable<__E> for Pat

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fn encode(&self, __encoder: &mut __E)

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impl HasAttrs for Pat

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const SUPPORTS_CUSTOM_INNER_ATTRS: bool = false

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 AttrVec))

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impl HasNodeId for Pat

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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 HasSpan for Pat

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fn span(&self) -> Span

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impl HasTokens for Pat

Auto Trait Implementations§

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impl !RefUnwindSafe for Pat

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impl !Send for Pat

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impl !Sync for Pat

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impl Unpin for Pat

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impl !UnwindSafe for Pat

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> ToOwned for Twhere 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 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.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 88 bytes