Enum CaptureBy 

pub enum CaptureBy {
    Value {
        move_kw: Span,
    },
    Ref,
    Use {
        use_kw: Span,
    },
}

A capture clause used in closures and async blocks.

Variants

Value

move |x| y + x.

Fields

move_kw: Span

The span of the move keyword.

Ref

move or use keywords were not specified.

Use

use |x| y + x.

Note that if you have a regular closure like || x.use, this will not result in a Use capture. Instead, the ExprUseVisitor will look at the type of x and treat x.use as either a copy/clone/move as appropriate.

Fields

use_kw: Span

The span of the use keyword.

Trait Implementations

impl Clone for CaptureBy

fn clone(&self) -> CaptureBy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaptureBy

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

Formats the value using the given formatter.

impl<__D> Decodable<__D> for CaptureBy

where __D: SpanDecoder,

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

impl<__E> Encodable<__E> for CaptureBy

where __E: SpanEncoder,

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

impl<__CTX> HashStable<__CTX> for CaptureBy

where __CTX: HashStableContext,

fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )

impl<__V> MutWalkable<__V> for CaptureBy

where __V: MutVisitor,

fn walk_mut(&mut self, __visitor: &mut __V)

impl PartialEq for CaptureBy

fn eq(&self, other: &CaptureBy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CaptureBy

impl StructuralPartialEq for CaptureBy

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: 12 bytes

Size for each variant:

• Value: 8 bytes
• Ref: 0 bytes
• Use: 8 bytes