Make --edition imply the preview flag

rust-lang · May 4, 2018 · b1951f4 · b1951f4
1 parent 10f66c7
commit b1951f4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
@@ -1848,6 +1848,12 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute],
 
     let mut feature_checker = FeatureChecker::default();
 
+    for &(.., f_edition, set) in ACTIVE_FEATURES.iter() {
+        if f_edition <= crate_edition {
+            set(&mut features, DUMMY_SP);
+        }
+    }
+
     for attr in krate_attrs {
         if !attr.check_name("feature") {
             continue