pub struct Arm {
pub attrs: AttrVec,
pub pat: P<Pat>,
pub guard: Option<P<Expr>>,
pub body: P<Expr>,
pub span: Span,
pub id: NodeId,
pub is_placeholder: bool,
}
Expand description
An arm of a ‘match’.
E.g., 0..=10 => { println!("match!") }
as in
match 123 {
0..=10 => { println!("match!") },
_ => { println!("no match!") },
}
Fields§
§attrs: AttrVec
§pat: P<Pat>
Match arm pattern, e.g. 10
in match foo { 10 => {}, _ => {} }
guard: Option<P<Expr>>
Match arm guard, e.g. n > 10
in match foo { n if n > 10 => {}, _ => {} }
body: P<Expr>
Match arm body.
span: Span
§id: NodeId
§is_placeholder: bool
Trait Implementations§
source§impl HasAttrs for Arm
impl HasAttrs for Arm
source§const SUPPORTS_CUSTOM_INNER_ATTRS: bool = false
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 morefn attrs(&self) -> &[Attribute]
fn visit_attrs(&mut self, f: impl FnOnce(&mut AttrVec))
source§impl HasTokens for Arm
impl HasTokens for Arm
fn tokens(&self) -> Option<&LazyAttrTokenStream>
fn tokens_mut(&mut self) -> Option<&mut Option<LazyAttrTokenStream>>
Auto Trait Implementations§
impl !RefUnwindSafe for Arm
impl !Send for Arm
impl !Sync for Arm
impl Unpin for Arm
impl !UnwindSafe for Arm
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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: 48 bytes