Struct rustc_hir::OpaqueTy

pub struct OpaqueTy<'hir> {
    pub generics: &'hir Generics<'hir>,
    pub bounds: GenericBounds<'hir>,
    pub origin: OpaqueTyOrigin,
    pub lifetime_mapping: &'hir [(&'hir Lifetime, LocalDefId)],
    pub in_trait: bool,
}

Fields

generics: &'hir Generics<'hir>

bounds: GenericBounds<'hir>

origin: OpaqueTyOrigin

lifetime_mapping: &'hir [(&'hir Lifetime, LocalDefId)]

Return-position impl traits (and async futures) must “reify” any late-bound lifetimes that are captured from the function signature they originate from.

This is done by generating a new early-bound lifetime parameter local to the opaque which is substituted in the function signature with the late-bound lifetime.

This mapping associated a captured lifetime (first parameter) with the new early-bound lifetime that was generated for the opaque.

in_trait: bool

Whether the opaque is a return-position impl trait (or async future) originating from a trait method. This makes it so that the opaque is lowered as an associated type.

Trait Implementations

impl<'hir> Clone for OpaqueTy<'hir>

fn clone(&self) -> OpaqueTy<'hir>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'hir> Debug for OpaqueTy<'hir>

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

Formats the value using the given formatter.

impl<'hir, __CTX> HashStable<__CTX> for OpaqueTy<'hir>where __CTX: HashStableContext,

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

impl<'hir> Copy for OpaqueTy<'hir>

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: 56 bytes