Rename `ACTIVE_FEATURES` as `UNSTABLE_FEATURES`.

It's a better name, and lets "active features" refer to the features
that are active in a particular program, due to being declared or
enabled by the edition.

The commit also renames `Features::enabled` as `Features::active` to
match this; I changed my mind and have decided that "active" is a little
better thatn "enabled" for this, particularly because a number of
pre-existing comments use "active" in this way.

Finally, the commit renames `Status::Stable` as `Status::Accepted`, to
match `ACCEPTED_FEATURES`.

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_expand/src/config.rs b/compiler/rustc_expand/src/config.rs
index 9909a9ade8b..b73c7593381 100644
--- a/compiler/rustc_expand/src/config.rs
+++ b/compiler/rustc_expand/src/config.rs
@@ -15,7 +15,7 @@ use rustc_attr as attr;
 use rustc_data_structures::flat_map_in_place::FlatMapInPlace;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_feature::Features;
-use rustc_feature::{ACCEPTED_FEATURES, ACTIVE_FEATURES, REMOVED_FEATURES};
+use rustc_feature::{ACCEPTED_FEATURES, REMOVED_FEATURES, UNSTABLE_FEATURES};
 use rustc_parse::validate_attr;
 use rustc_session::parse::feature_err;
 use rustc_session::Session;
@@ -73,7 +73,7 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
     // Enable edition-dependent features based on `features_edition`.
     // - E.g. enable `test_2018_feature` if `features_edition` is 2018 or higher
     let mut edition_enabled_features = FxHashSet::default();
-    for f in ACTIVE_FEATURES {
+    for f in UNSTABLE_FEATURES {
         if let Some(edition) = f.feature.edition && edition <= features_edition {
             // FIXME(Manishearth) there is currently no way to set lib features by
             // edition.
@@ -165,7 +165,7 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
             }
 
             // If the declared feature is unstable, record it.
-            if let Some(f) = ACTIVE_FEATURES.iter().find(|f| name == f.feature.name) {
+            if let Some(f) = UNSTABLE_FEATURES.iter().find(|f| name == f.feature.name) {
                 (f.set_enabled)(&mut features);
                 features.set_declared_lang_feature(name, mi.span(), None);
                 continue;