Struct rustc_session::parse::GatedSpans

pub struct GatedSpans {
    pub spans: Lock<FxHashMap<Symbol, Vec<Span>>>,
}

Collected spans during parsing for places where a certain feature was used and should be feature gated accordingly in check_crate.

Fields

spans: Lock<FxHashMap<Symbol, Vec<Span>>>

Implementations

impl GatedSpans

pub fn gate(&self, feature: Symbol, span: Span)

Feature gate the given span under the given feature which is same Symbol used in unstable.rs.

pub fn ungate_last(&self, feature: Symbol, span: Span)

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.

pub fn merge(&self, spans: FxHashMap<Symbol, Vec<Span>>)

Prepend the given set of spans onto the set in self.

Trait Implementations

impl Default for GatedSpans

fn default() -> GatedSpans

Returns the “default value” for a type.

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: 40 bytes