Type Alias ProvidedValue

pub type ProvidedValue<'tcx> = CrateDepKind;

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> {
    MacrosOnly,
    Implicit,
    Explicit,
}

Variants

MacrosOnly

A dependency that is only used for its macros.

Implicit

A dependency that is always injected into the dependency list and so doesn’t need to be linked to an rlib, e.g., the injected allocator.

Explicit

A dependency that is required by an rlib version of this crate. Ordinary extern crates result in Explicit dependencies.

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:

• MacrosOnly: 0 bytes
• Implicit: 0 bytes
• Explicit: 0 bytes