privacy: Stabilize lint unnameable_types

Author: petrochenkov

compiler/rustc_feature/src/accepted.rs

@@ -350,6 +350,8 @@ declare_features! (
     (accepted, type_alias_enum_variants, "1.37.0", Some(49683)),
     /// Allows macros to appear in the type position.
     (accepted, type_macros, "1.13.0", Some(27245)),
+    /// Allows using type privacy lints (`private_interfaces`, `private_bounds`, `unnameable_types`).
+    (accepted, type_privacy_lints, "CURRENT_RUSTC_VERSION", Some(48054)),
     /// Allows `const _: TYPE = VALUE`.
     (accepted, underscore_const_names, "1.37.0", Some(54912)),
     /// Allows `use path as _;` and `extern crate c as _;`.

compiler/rustc_feature/src/unstable.rs

@@ -597,8 +597,6 @@ declare_features! (
     /// Allows creation of instances of a struct by moving fields that have
     /// not changed from prior instances of the same struct (RFC #2528)
     (unstable, type_changing_struct_update, "1.58.0", Some(86555)),
-    /// Allows using type privacy lints (`private_interfaces`, `private_bounds`, `unnameable_types`).
-    (unstable, type_privacy_lints, "1.72.0", Some(48054)),
     /// Enables rustc to generate code that instructs libstd to NOT ignore SIGPIPE.
     (unstable, unix_sigpipe, "1.65.0", Some(97889)),
     /// Allows unnamed fields of struct and union type

compiler/rustc_lint_defs/src/builtin.rs

@@ -4395,7 +4395,6 @@ declare_lint! {
     /// ### Example
     ///
     /// ```rust,compile_fail
-    /// # #![feature(type_privacy_lints)]
     /// # #![allow(unused)]
     /// #![deny(unnameable_types)]
     /// mod m {
@@ -4415,7 +4414,6 @@ declare_lint! {
     pub UNNAMEABLE_TYPES,
     Allow,
     "effective visibility of a type is larger than the area in which it can be named",
-    @feature_gate = sym::type_privacy_lints;
 }
 
 declare_lint! {

tests/ui/feature-gates/feature-gate-type_privacy_lints.rs

@@ -1,4 +1,3 @@
-#![feature(type_privacy_lints)]
 #![deny(unnameable_types)]
 
 mod m {

tests/ui/feature-gates/feature-gate-type_privacy_lints.stderr

@@ -1,23 +1,23 @@
 error: struct `PubStruct` is reachable but cannot be named
-  --> $DIR/unnameable_types.rs:5:5
+  --> $DIR/unnameable_types.rs:4:5
    |
 LL |     pub struct PubStruct(pub i32);
    |     ^^^^^^^^^^^^^^^^^^^^ reachable at visibility `pub`, but can only be named at visibility `pub(crate)`
    |
 note: the lint level is defined here
-  --> $DIR/unnameable_types.rs:2:9
+  --> $DIR/unnameable_types.rs:1:9
    |
 LL | #![deny(unnameable_types)]
    |         ^^^^^^^^^^^^^^^^
 
 error: enum `PubE` is reachable but cannot be named
-  --> $DIR/unnameable_types.rs:7:5
+  --> $DIR/unnameable_types.rs:6:5
    |
 LL |     pub enum PubE {
    |     ^^^^^^^^^^^^^ reachable at visibility `pub`, but can only be named at visibility `pub(crate)`
 
 error: trait `PubTr` is reachable but cannot be named
-  --> $DIR/unnameable_types.rs:11:5
+  --> $DIR/unnameable_types.rs:10:5
    |
 LL |     pub trait PubTr {
    |     ^^^^^^^^^^^^^^^ reachable at visibility `pub`, but can only be named at visibility `pub(crate)`