Type Alias rustc_middle::query::queries::param_env::ProvidedValue

pub type ProvidedValue<'tcx> = ParamEnv<'tcx>;

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

struct ProvidedValue<'tcx> {
    packed: CopyTaggedPtr<&'tcx List<Clause<'tcx>>, ParamTag, true>,
}

Fields

packed: CopyTaggedPtr<&'tcx List<Clause<'tcx>>, ParamTag, true>

This packs both caller bounds and the reveal enum into one pointer.

Caller bounds are Obligations that the caller must satisfy. This is basically the set of bounds on the in-scope type parameters, translated into Obligations, and elaborated and normalized.

Use the caller_bounds() method to access.

Typically, this is Reveal::UserFacing, but during codegen we want Reveal::All.

Note: This is packed, use the reveal() method to access it.

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: 8 bytes