Function rustc_session::parse::feature_err
source · pub fn feature_err(
sess: &Session,
feature: Symbol,
span: impl Into<MultiSpan>,
explain: impl Into<DiagMessage>,
) -> Diag<'_>
Expand description
Construct a diagnostic for a language feature error due to the given span
.
The feature
’s Symbol
is the one you used in unstable.rs
and rustc_span::symbols
.