rename lang feature lists to include LANG

Author: RalfJung

Diff for: compiler/rustc_expand/src/config.rs

@@ -11,7 +11,8 @@ use rustc_ast::{
 use rustc_attr as attr;
 use rustc_data_structures::flat_map_in_place::FlatMapInPlace;
 use rustc_feature::{
-    ACCEPTED_FEATURES, AttributeSafety, Features, REMOVED_FEATURES, UNSTABLE_FEATURES,
+    ACCEPTED_LANG_FEATURES, AttributeSafety, Features, REMOVED_LANG_FEATURES,
+    UNSTABLE_LANG_FEATURES,
 };
 use rustc_lint_defs::BuiltinLintDiag;
 use rustc_parse::validate_attr;
@@ -77,7 +78,7 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute], crate_name: Symbol) -
             };
 
             // If the enabled feature has been removed, issue an error.
-            if let Some(f) = REMOVED_FEATURES.iter().find(|f| name == f.feature.name) {
+            if let Some(f) = REMOVED_LANG_FEATURES.iter().find(|f| name == f.feature.name) {
                 sess.dcx().emit_err(FeatureRemoved {
                     span: mi.span(),
                     reason: f.reason.map(|reason| FeatureRemovedReason { reason }),
@@ -86,7 +87,7 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute], crate_name: Symbol) -
             }
 
             // If the enabled feature is stable, record it.
-            if let Some(f) = ACCEPTED_FEATURES.iter().find(|f| name == f.name) {
+            if let Some(f) = ACCEPTED_LANG_FEATURES.iter().find(|f| name == f.name) {
                 let since = Some(Symbol::intern(f.since));
                 features.set_enabled_lang_feature(name, mi.span(), since);
                 continue;
@@ -103,7 +104,7 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute], crate_name: Symbol) -
             }
 
             // If the enabled feature is unstable, record it.
-            if UNSTABLE_FEATURES.iter().find(|f| name == f.name).is_some() {
+            if UNSTABLE_LANG_FEATURES.iter().find(|f| name == f.name).is_some() {
                 // When the ICE comes from core, alloc or std (approximation of the standard
                 // library), there's a chance that the person hitting the ICE may be using
                 // -Zbuild-std or similar with an untested target. The bug is probably in the

Diff for: compiler/rustc_feature/src/accepted.rs

@@ -9,7 +9,7 @@ macro_rules! declare_features {
         $(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr),
     )+) => {
         /// Formerly unstable features that have now been accepted (stabilized).
-        pub const ACCEPTED_FEATURES: &[Feature] = &[
+        pub const ACCEPTED_LANG_FEATURES: &[Feature] = &[
             $(Feature {
                 name: sym::$feature,
                 since: $ver,

Diff for: compiler/rustc_feature/src/lib.rs

@@ -94,13 +94,13 @@ impl UnstableFeatures {
 
 fn find_lang_feature_issue(feature: Symbol) -> Option<NonZero<u32>> {
     // Search in all the feature lists.
-    if let Some(f) = UNSTABLE_FEATURES.iter().find(|f| f.name == feature) {
+    if let Some(f) = UNSTABLE_LANG_FEATURES.iter().find(|f| f.name == feature) {
         return f.issue;
     }
-    if let Some(f) = ACCEPTED_FEATURES.iter().find(|f| f.name == feature) {
+    if let Some(f) = ACCEPTED_LANG_FEATURES.iter().find(|f| f.name == feature) {
         return f.issue;
     }
-    if let Some(f) = REMOVED_FEATURES.iter().find(|f| f.feature.name == feature) {
+    if let Some(f) = REMOVED_LANG_FEATURES.iter().find(|f| f.feature.name == feature) {
         return f.feature.issue;
     }
     panic!("feature `{feature}` is not declared anywhere");
@@ -127,12 +127,12 @@ pub fn find_feature_issue(feature: Symbol, issue: GateIssue) -> Option<NonZero<u
     }
 }
 
-pub use accepted::ACCEPTED_FEATURES;
+pub use accepted::ACCEPTED_LANG_FEATURES;
 pub use builtin_attrs::{
     AttributeDuplicates, AttributeGate, AttributeSafety, AttributeTemplate, AttributeType,
     BUILTIN_ATTRIBUTE_MAP, BUILTIN_ATTRIBUTES, BuiltinAttribute, GatedCfg, deprecated_attributes,
     encode_cross_crate, find_gated_cfg, is_builtin_attr_name, is_stable_diagnostic_attribute,
     is_valid_for_get_attr,
 };
-pub use removed::REMOVED_FEATURES;
-pub use unstable::{Features, INCOMPATIBLE_FEATURES, UNSTABLE_FEATURES};
+pub use removed::REMOVED_LANG_FEATURES;
+pub use unstable::{Features, INCOMPATIBLE_FEATURES, UNSTABLE_LANG_FEATURES};

Diff for: compiler/rustc_feature/src/removed.rs

@@ -14,7 +14,7 @@ macro_rules! declare_features {
         $(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, $reason:expr),
     )+) => {
         /// Formerly unstable features that have now been removed.
-        pub const REMOVED_FEATURES: &[RemovedFeature] = &[
+        pub const REMOVED_LANG_FEATURES: &[RemovedFeature] = &[
             $(RemovedFeature {
                 feature: Feature {
                     name: sym::$feature,

Diff for: compiler/rustc_feature/src/unstable.rs

@@ -78,7 +78,7 @@ macro_rules! declare_features {
     )+) => {
         /// Unstable language features that are being implemented or being
         /// considered for acceptance (stabilization) or removal.
-        pub const UNSTABLE_FEATURES: &[Feature] = &[
+        pub const UNSTABLE_LANG_FEATURES: &[Feature] = &[
             $(Feature {
                 name: sym::$feature,
                 since: $ver,

Diff for: compiler/rustc_passes/src/stability.rs

@@ -10,7 +10,7 @@ use rustc_attr::{
 };
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::unord::{ExtendUnord, UnordMap, UnordSet};
-use rustc_feature::ACCEPTED_FEATURES;
+use rustc_feature::ACCEPTED_LANG_FEATURES;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::{CRATE_DEF_ID, LOCAL_CRATE, LocalDefId, LocalModDefId};
@@ -248,7 +248,7 @@ impl<'a, 'tcx> Annotator<'a, 'tcx> {
             }
 
             if let Stability { level: Unstable { .. }, feature } = stab {
-                if ACCEPTED_FEATURES.iter().find(|f| f.name == feature).is_some() {
+                if ACCEPTED_LANG_FEATURES.iter().find(|f| f.name == feature).is_some() {
                     self.tcx
                         .dcx()
                         .emit_err(errors::UnstableAttrForAlreadyStableFeature { span, item_sp });
@@ -261,7 +261,7 @@ impl<'a, 'tcx> Annotator<'a, 'tcx> {
             }
 
             if let Some(ConstStability { level: Unstable { .. }, feature, .. }) = const_stab {
-                if ACCEPTED_FEATURES.iter().find(|f| f.name == feature).is_some() {
+                if ACCEPTED_LANG_FEATURES.iter().find(|f| f.name == feature).is_some() {
                     self.tcx.dcx().emit_err(errors::UnstableAttrForAlreadyStableFeature {
                         span: const_span.unwrap(), // If const_stab contains Some(..), same is true for const_span
                         item_sp,

Diff for: compiler/rustc_query_system/src/ich/impls_syntax.rs

@@ -116,7 +116,7 @@ impl<'tcx> HashStable<StableHashingContext<'tcx>> for rustc_feature::Features {
         self.enabled_lib_features().hash_stable(hcx, hasher);
 
         // FIXME: why do we hash something that is a compile-time constant?
-        for feature in rustc_feature::UNSTABLE_FEATURES.iter() {
+        for feature in rustc_feature::UNSTABLE_LANG_FEATURES.iter() {
             feature.name.hash_stable(hcx, hasher);
         }
     }