Enum RegionElement 

pub(crate) enum RegionElement<'tcx> {
    Location(Location),
    RootUniversalRegion(RegionVid),
    PlaceholderRegion(PlaceholderRegion<'tcx>),
}

An individual element in a region value – the value of a particular region variable consists of a set of these elements.

Variants

Location(Location)

A point in the control-flow graph.

RootUniversalRegion(RegionVid)

A universally quantified region from the root universe (e.g., a lifetime parameter).

PlaceholderRegion(PlaceholderRegion<'tcx>)

A placeholder (e.g., instantiated from a for<'a> fn(&'a u32) type).

Trait Implementations

impl<'tcx> Clone for RegionElement<'tcx>

fn clone(&self) -> RegionElement<'tcx>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for RegionElement<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> PartialEq for RegionElement<'tcx>

fn eq(&self, other: &RegionElement<'tcx>) -> 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<'tcx> StructuralPartialEq for RegionElement<'tcx>

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: 24 bytes

Size for each variant:

• Location: 20 bytes
• RootUniversalRegion: 4 bytes
• PlaceholderRegion: 16 bytes