Struct rustc::hir::Pat

pub struct Pat {
    pub id: NodeId,
    pub hir_id: HirId,
    pub node: PatKind,
    pub span: Span,
}

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Fields

id: NodeId

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hir_id: HirId

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node: PatKind

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span: Span

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Methods

impl Pat

pub fn is_refutable(&self) -> bool

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pub fn is_const(&self) -> bool

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pub fn each_binding<F>(&self, f: F) where
    F: FnMut(BindingAnnotation, NodeId, Span, &Spanned<Name>), 

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Call f on every "binding" in a pattern, e.g., on a in match foo() { Some(a) => (), None => () }

pub fn contains_bindings(&self) -> bool

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Checks if the pattern contains any patterns that bind something to an ident, e.g. foo, or Foo(foo) or foo @ Bar(..).

pub fn contains_bindings_or_wild(&self) -> bool

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Checks if the pattern contains any patterns that bind something to an ident or wildcard, e.g. foo, or Foo(_), foo @ Bar(..),

pub fn simple_name(&self) -> Option<Name>

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Important traits for Vec<u8>

impl Write for Vec<u8>

pub fn necessary_variants(&self) -> Vec<DefId>

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Return variants that are necessary to exist for the pattern to match.

pub fn contains_explicit_ref_binding(&self) -> Option<Mutability>

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Checks if the pattern contains any ref or ref mut bindings, and if yes whether it contains mutable or just immutables ones.

FIXME(tschottdorf): this is problematic as the HIR is being scraped, but ref bindings are be implicit after #42640 (default match binding modes).

See #44848.

impl Pat

pub fn walk<F>(&self, it: F) -> bool where
    F: FnMut(&Pat) -> bool, 

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Trait Implementations

impl Clone for Pat

fn clone(&self) -> Pat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for Pat

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

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

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

This method tests for !=.

impl Eq for Pat

impl Encodable for Pat

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

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impl Decodable for Pat

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

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impl Hash for Pat

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 Pat

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

Formats the value using the given formatter.

impl<'gcx> HashStable<StableHashingContext<'gcx>> for Pat

fn hash_stable<W: StableHasherResult>(
    &self,
    hcx: &mut StableHashingContext<'gcx>,
    hasher: &mut StableHasher<W>
)

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impl ast_node for Pat

fn id(&self) -> NodeId

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fn span(&self) -> Span

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