diff options
Diffstat (limited to 'src/libsyntax/feature_gate.rs')
| -rw-r--r-- | src/libsyntax/feature_gate.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs index b2982629fe6..280b17da0be 100644 --- a/src/libsyntax/feature_gate.rs +++ b/src/libsyntax/feature_gate.rs @@ -2008,7 +2008,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> { } pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], - crate_edition: Edition) -> Features { + crate_edition: Edition, allow_features: &Option<Vec<String>>) -> Features { fn feature_removed(span_handler: &Handler, span: Span, reason: Option<&str>) { let mut err = struct_span_err!(span_handler, span, E0557, "feature has been removed"); if let Some(reason) = reason { @@ -2127,6 +2127,15 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], } if let Some((.., set)) = ACTIVE_FEATURES.iter().find(|f| name == f.0) { + if let Some(allowed) = allow_features.as_ref() { + if allowed.iter().find(|f| *f == name.as_str()).is_none() { + span_err!(span_handler, mi.span, E0725, + "the feature `{}` is not in the list of allowed features", + name); + continue; + } + } + set(&mut features, mi.span); features.declared_lang_features.push((name, mi.span, None)); continue |