Enum syntax::feature_gate::UnstableFeatures

pub enum UnstableFeatures {
    Disallow,
    Allow,
    Cheat,
}

Unstable (rustc_private)

Variants

Disallow

Unstable (rustc_private)

Hard errors for unstable features are active, as on beta/stable channels.

Allow

Unstable (rustc_private)

Allow features to me activated, as on nightly.

Cheat

Unstable (rustc_private)

Errors are bypassed for bootstrapping. This is required any time during the build that feature-related lints are set to warn or above because the build turns on warnings-as-errors and uses lots of unstable features. As a result, this is always required for building Rust itself.

Trait Implementations

Derived Implementations

impl Copy for UnstableFeatures

impl Clone for UnstableFeatures

fn clone(&self) -> UnstableFeatures

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.