Enum rustc_middle::middle::stability::EvalResult

pub enum EvalResult {
    Allow,
    Deny {
        feature: Symbol,
        reason: Option<Symbol>,
        issue: Option<NonZeroU32>,
        is_soft: bool,
    },
    Unmarked,
}

Result of TyCtxt::eval_stability.

Variants

Allow

We can use the item because it is stable or we provided the corresponding feature gate.

Deny

We cannot use the item because it is unstable and we did not provide the corresponding feature gate.

Fields of Deny

feature: Symbolreason: Option<Symbol>issue: Option<NonZeroU32>is_soft: bool

Unmarked

The item does not have the #[stable] or #[unstable] marker assigned.

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. 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: 16 bytes