Enum rustc::hir::PatKind

pub enum PatKind {
    Wild,
    Binding(BindingAnnotation, NodeId, Spanned<Name>, Option<P<Pat>>),
    Struct(QPath, HirVec<Spanned<FieldPat>>, bool),
    TupleStruct(QPath, HirVec<P<Pat>>, Option<usize>),
    Path(QPath),
    Tuple(HirVec<P<Pat>>, Option<usize>),
    Box(P<Pat>),
    Ref(P<Pat>, Mutability),
    Lit(P<Expr>),
    Range(P<Expr>, P<Expr>, RangeEnd),
    Slice(HirVec<P<Pat>>, Option<P<Pat>>, HirVec<P<Pat>>),
}

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Variants

Wild

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Represents a wildcard pattern (_)

Binding(BindingAnnotation, NodeId, Spanned<Name>, Option<P<Pat>>)

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A fresh binding ref mut binding @ OPT_SUBPATTERN. The NodeId is the canonical ID for the variable being bound, e.g. in Ok(x) | Err(x), both x use the same canonical ID, which is the pattern ID of the first x.

Struct(QPath, HirVec<Spanned<FieldPat>>, bool)

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A struct or struct variant pattern, e.g. Variant {x, y, ..}. The bool is true in the presence of a ...

TupleStruct(QPath, HirVec<P<Pat>>, Option<usize>)

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A tuple struct/variant pattern Variant(x, y, .., z). If the .. pattern fragment is present, then Option<usize> denotes its position. 0 <= position <= subpats.len()

Path(QPath)

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A path pattern for an unit struct/variant or a (maybe-associated) constant.

Tuple(HirVec<P<Pat>>, Option<usize>)

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A tuple pattern (a, b). If the .. pattern fragment is present, then Option<usize> denotes its position. 0 <= position <= subpats.len()

Box(P<Pat>)

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A box pattern

Ref(P<Pat>, Mutability)

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A reference pattern, e.g. &mut (a, b)

Lit(P<Expr>)

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A literal

Range(P<Expr>, P<Expr>, RangeEnd)

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A range pattern, e.g. 1...2 or 1..2

Slice(HirVec<P<Pat>>, Option<P<Pat>>, HirVec<P<Pat>>)

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[a, b, ..i, y, z] is represented as: PatKind::Slice(box [a, b], Some(i), box [y, z])

Trait Implementations

impl Clone for PatKind

fn clone(&self) -> PatKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for PatKind

fn eq(&self, __arg_0: &PatKind) -> bool

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

fn ne(&self, __arg_0: &PatKind) -> bool

This method tests for !=.

impl Eq for PatKind

impl Encodable for PatKind

fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>

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impl Decodable for PatKind

fn decode<__D: Decoder>(__arg_0: &mut __D) -> Result<PatKind, __D::Error>

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impl Hash for PatKind

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Debug for PatKind

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'tcx> HashStable<StableHashingContext<'tcx>> for PatKind

fn hash_stable<W: StableHasherResult>(
    &self,
    __ctx: &mut StableHashingContext<'tcx>,
    __hasher: &mut StableHasher<W>
)

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

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?