Struct rustc_ap_rustc_ast::ast::Pat

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

A match pattern.

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

Fields

id: NodeId

kind: PatKind

span: Span

tokens: Option<LazyTokenStream>

Implementations

impl Pat

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

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

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.

pub fn is_rest(&self) -> bool

Is this a .. pattern?

Trait Implementations

impl AstLike for Pat

const SUPPORTS_CUSTOM_INNER_ATTRS: bool

This is true if this AstLike might support ‘custom’ (proc-macro) inner attributes. Attributes like #![cfg] and #![cfg_attr] are not considered ‘custom’ attributes

fn attrs(&self) -> &[Attribute]

fn visit_attrs(&mut self, _f: impl FnOnce(&mut Vec<Attribute>))

fn tokens_mut(&mut self) -> Option<&mut Option<LazyTokenStream>>

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 Debug for Pat

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for Pat

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

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

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>