Enum LateParamRegionKind

pub enum LateParamRegionKind {
    Anon(u32),
    Named(DefId, Symbol),
    ClosureEnv,
}

When liberating bound regions, we map their BoundRegionKind to this as we need to track the index of anonymous regions. We otherwise end up liberating multiple bound regions to the same late-bound region.

Variants

Anon(u32)

An anonymous region parameter for a given fn (&T)

Unlike BoundRegionKind::Anon, this tracks the index of the liberated bound region.

We should ideally never liberate anonymous regions, but do so for the sake of diagnostics in FnCtxt::sig_of_closure_with_expectation.

Named(DefId, Symbol)

Named region parameters for functions (a in &’a T)

The DefId is needed to distinguish free regions in the event of shadowing.

ClosureEnv

Anonymous region for the implicit env pointer parameter to a closure

Implementations

impl LateParamRegionKind

pub fn from_bound(var: BoundVar, br: BoundRegionKind) -> LateParamRegionKind

pub fn is_named(&self) -> bool

pub fn get_name(&self) -> Option<Symbol>

pub fn get_id(&self) -> Option<DefId>

Trait Implementations

impl Clone for LateParamRegionKind

fn clone(&self) -> LateParamRegionKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LateParamRegionKind

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

Formats the value using the given formatter.

impl<__D: TyDecoder> Decodable<__D> for LateParamRegionKind

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

impl<__E: TyEncoder> Encodable<__E> for LateParamRegionKind

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

impl Hash for LateParamRegionKind

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<'__ctx> HashStable<StableHashingContext<'__ctx>> for LateParamRegionKind

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher, )

impl PartialEq for LateParamRegionKind

fn eq(&self, other: &LateParamRegionKind) -> 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 LateParamRegionKind

impl Eq for LateParamRegionKind

impl StructuralPartialEq for LateParamRegionKind

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:

• Anon: 8 bytes
• Named: 12 bytes
• ClosureEnv: 0 bytes