Enum syntex_syntax::feature_gate::UnstableFeatures
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pub enum UnstableFeatures { Disallow, Allow, Cheat, }
Variants
Disallow
Hard errors for unstable features are active, as on beta/stable channels.
Allow
Allow features to me activated, as on nightly.
Cheat
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
impl Clone for UnstableFeatures
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fn clone(&self) -> UnstableFeatures
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more
impl Copy for UnstableFeatures
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impl PartialEq for UnstableFeatures
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fn eq(&self, __arg_0: &UnstableFeatures) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Rhs) -> bool
1.0.0
This method tests for !=
.
impl Eq for UnstableFeatures
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impl Hash for UnstableFeatures
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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
Feeds this value into the state given, updating the hasher as necessary.
fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher
1.3.0
Feeds a slice of this type into the state provided.