Type Alias rustc_middle::query::queries::impl_polarity::ProvidedValue
source · pub type ProvidedValue<'tcx> = ImplPolarity;
Expand description
This type alias specifies the type returned from query providers and the type
used for decoding. For regular queries this is the declared returned type V
,
but arena_cache
will use <V as Deref>::Target
instead.
Aliased Type§
enum ProvidedValue<'tcx> {
Positive,
Negative,
Reservation,
}
Variants§
Positive
impl Trait for Type
Negative
impl !Trait for Type
Reservation
#[rustc_reservation_impl] impl Trait for Type
This is a “stability hack”, not a real Rust feature. See #64631 for details.
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: 1 byte
Size for each variant:
Positive
: 0 bytesNegative
: 0 bytesReservation
: 0 bytes