Enum rustc_hir::def::LifetimeRes

pub enum LifetimeRes {
    Param {
        param: LocalDefId,
        binder: NodeId,
    },
    Fresh {
        param: NodeId,
        binder: NodeId,
        kind: MissingLifetimeKind,
    },
    Infer,
    Static,
    Error,
    ElidedAnchor {
        start: NodeId,
        end: NodeId,
    },
}

Resolution for a lifetime appearing in a type.

Variants

Param

Successfully linked the lifetime to a generic parameter.

Fields

param: LocalDefId

Id of the generic parameter that introduced it.

binder: NodeId

Id of the introducing place. That can be:

• an item’s id, for the item’s generic parameters;
• a TraitRef’s ref_id, identifying the for<...> binder;
• a BareFn type’s id.

This information is used for impl-trait lifetime captures, to know when to or not to capture any given lifetime.

Fresh

Created a generic parameter for an anonymous lifetime.

Fields

param: NodeId

Id of the generic parameter that introduced it.

Creating the associated LocalDefId is the responsibility of lowering.

binder: NodeId

Id of the introducing place. See Param.

kind: MissingLifetimeKind

Kind of elided lifetime

Infer

This variant is used for anonymous lifetimes that we did not resolve during late resolution. Those lifetimes will be inferred by typechecking.

Static

Explicit 'static lifetime.

Error

Resolution failure.

ElidedAnchor

HACK: This is used to recover the NodeId of an elided lifetime.

Fields

start: NodeId

end: NodeId

Trait Implementations

impl Clone for LifetimeRes

fn clone(&self) -> LifetimeRes

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LifetimeRes

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

Formats the value using the given formatter.

impl Hash for LifetimeRes

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

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LifetimeRes

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

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

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

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

impl Copy for LifetimeRes

impl Eq for LifetimeRes

impl StructuralPartialEq for LifetimeRes

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:

• Param: 11 bytes
• Fresh: 11 bytes
• Infer: 0 bytes
• Static: 0 bytes
• Error: 0 bytes
• ElidedAnchor: 11 bytes