Enum rustc_borrowck::diagnostics::region_name::RegionNameHighlight

pub(crate) enum RegionNameHighlight {
    MatchedHirTy(Span),
    MatchedAdtAndSegment(Span),
    CannotMatchHirTy(Span, String),
    Occluded(Span, String),
}

Describes what to highlight to explain to the user that we’re giving an anonymous region a synthesized name, and how to highlight it.

Variants

MatchedHirTy(Span)

The anonymous region corresponds to a reference that was found by traversing the type in the HIR.

MatchedAdtAndSegment(Span)

The anonymous region corresponds to a '_ in the generics list of a struct/enum/union.

CannotMatchHirTy(Span, String)

The anonymous region corresponds to a region where the type annotation is completely missing from the code, e.g. in a closure arguments |x| { ... }, where x is a reference.

Occluded(Span, String)

The anonymous region corresponds to a region where the type annotation is completely missing from the code, and even if we print out the full name of the type, the region name won’t be included. This currently occurs for opaque types like impl Future.

Trait Implementations

impl Clone for RegionNameHighlight

fn clone(&self) -> RegionNameHighlight

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RegionNameHighlight

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

Formats the value using the given formatter.

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: 40 bytes

Size for each variant:

• MatchedHirTy: 8 bytes
• MatchedAdtAndSegment: 8 bytes
• CannotMatchHirTy: 36 bytes
• Occluded: 36 bytes