Struct rustc_trait_selection::infer::region_constraints::MemberConstraint

source · 
pub struct MemberConstraint<'tcx> {
    pub key: OpaqueTypeKey<'tcx>,
    pub definition_span: Span,
    pub hidden_ty: Ty<'tcx>,
    pub member_region: Region<'tcx>,
    pub choice_regions: Rc<Vec<Region<'tcx>, Global>>,
}
Expand description

Requires that region must be equal to one of the regions in choice_regions. We often denote this using the syntax:

R0 member of [O1..On]

Fields

key: OpaqueTypeKey<'tcx>

The DefId and substs of the opaque type causing this constraint. Used for error reporting.

definition_span: Span

The span where the hidden type was instantiated.

hidden_ty: Ty<'tcx>

The hidden type in which member_region appears: used for error reporting.

member_region: Region<'tcx>

The region R0.

choice_regions: Rc<Vec<Region<'tcx>, Global>>

The options O1..On.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Whether this makes sense to suggest in a diagnostic. Read more
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

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: 48 bytes