GatedSpans in rustc_session::parse - Rust (original) (raw)
pub struct GatedSpans {
pub spans: Lock<FxHashMap<Symbol, Vec<Span>>>,
}Expand description
Collected spans during parsing for places where a certain feature was used and should be feature gated accordingly in check_crate.
Feature gate the given span under the given featurewhich is same Symbol used in unstable.rs.
Ungate the last span under the given feature. Panics if the given span wasn’t the last one.
Using this is discouraged unless you have a really good reason to.
Prepend the given set of spans onto the set in self.
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: 40 bytes