Rename optin_builtin_traits to auto_traits

compiler/rustc_ast_passes/src/feature_gate.rs

@@ -370,7 +370,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
             ast::ItemKind::Trait(ast::IsAuto::Yes, ..) => {
                 gate_feature_post!(
                     &self,
-                    optin_builtin_traits,
+                    auto_traits,
                     i.span,
                     "auto traits are experimental and possibly buggy"
                 );

compiler/rustc_codegen_cranelift/example/mini_core.rs

@@ -1,6 +1,6 @@
 #![feature(
     no_core, lang_items, intrinsics, unboxed_closures, type_ascription, extern_types,
-    untagged_unions, decl_macro, rustc_attrs, transparent_unions, optin_builtin_traits,
+    untagged_unions, decl_macro, rustc_attrs, transparent_unions, auto_traits,
     thread_local,
 )]
 #![no_core]

compiler/rustc_data_structures/src/lib.rs

@@ -15,7 +15,8 @@
 #![feature(fn_traits)]
 #![feature(int_bits_const)]
 #![feature(min_specialization)]
-#![feature(optin_builtin_traits)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![feature(nll)]
 #![feature(allow_internal_unstable)]
 #![feature(hash_raw_entry)]

compiler/rustc_error_codes/src/error_codes/E0198.md

@@ -16,7 +16,7 @@ unsafe.
 This will compile:
 
 ```ignore (ignore auto_trait future compatibility warning)
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 struct Foo;
 

compiler/rustc_error_codes/src/error_codes/E0321.md

@@ -4,7 +4,7 @@ or enum type.
 Erroneous code example:
 
 ```compile_fail,E0321
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 struct Foo;
 

compiler/rustc_error_codes/src/error_codes/E0567.md

@@ -3,7 +3,7 @@ Generics have been used on an auto trait.
 Erroneous code example:
 
 ```compile_fail,E0567
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Generic<T> {} // error!
 # fn main() {}
@@ -16,7 +16,7 @@ parameters.
 To fix this issue, just remove the generics:
 
 ```
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Generic {} // ok!
 # fn main() {}

compiler/rustc_error_codes/src/error_codes/E0568.md

@@ -3,7 +3,7 @@ A super trait has been added to an auto trait.
 Erroneous code example:
 
 ```compile_fail,E0568
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Bound : Copy {} // error!
 
@@ -18,7 +18,7 @@ all the existing types could implement `Bound` because very few of them have the
 To fix this issue, just remove the super trait:
 
 ```
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Bound {} // ok!
 

compiler/rustc_feature/src/active.rs

@@ -149,9 +149,6 @@ declare_features! (
     /// Allows using the `#[linkage = ".."]` attribute.
     (active, linkage, "1.0.0", Some(29603), None),
 
-    /// Allows features specific to OIBIT (auto traits).
-    (active, optin_builtin_traits, "1.0.0", Some(13231), None),
-
     /// Allows using `box` in patterns (RFC 469).
     (active, box_patterns, "1.0.0", Some(29641), None),
 
@@ -215,6 +212,10 @@ declare_features! (
     /// purpose as `#[allow_internal_unstable]`.
     (active, rustc_allow_const_fn_unstable, "1.49.0", Some(69399), None),
 
+    /// Allows features specific to auto traits.
+    /// Renamed from `optin_builtin_traits`.
+    (active, auto_traits, "1.50.0", Some(13231), None),
+
     // no-tracking-issue-end
 
     // -------------------------------------------------------------------------

compiler/rustc_feature/src/removed.rs

@@ -71,6 +71,10 @@ declare_features! (
     /// Allows using custom attributes (RFC 572).
     (removed, custom_attribute, "1.0.0", Some(29642), None,
      Some("removed in favor of `#![register_tool]` and `#![register_attr]`")),
+    /// Allows features specific to OIBIT (now called auto traits).
+    /// Renamed to `auto_traits`.
+    (removed, optin_builtin_traits, "1.0.0", Some(13231), None,
+     Some("renamed to `auto_traits`")),
     (removed, pushpop_unsafe, "1.2.0", None, None, None),
     (removed, needs_allocator, "1.4.0", Some(27389), None,
      Some("subsumed by `#![feature(allocator_internals)]`")),
@@ -113,7 +117,6 @@ declare_features! (
      Some("removed in favor of `#![feature(marker_trait_attr)]`")),
     /// Allows `#[no_debug]`.
     (removed, no_debug, "1.43.0", Some(29721), None, Some("removed due to lack of demand")),
-
     /// Allows comparing raw pointers during const eval.
     (removed, const_compare_raw_pointers, "1.46.0", Some(53020), None,
      Some("cannot be allowed in const eval in any meaningful way")),

compiler/rustc_middle/src/mir/mod.rs

@@ -811,7 +811,7 @@ pub struct LocalDecl<'tcx> {
     /// after typeck.
     ///
     /// This should be sound because the drop flags are fully algebraic, and
-    /// therefore don't affect the OIBIT or outlives properties of the
+    /// therefore don't affect the auto-trait or outlives properties of the
     /// generator.
     pub internal: bool,
 

compiler/rustc_middle/src/traits/mod.rs

@@ -70,7 +70,7 @@ pub enum Reveal {
     /// be observable directly by the user, `Reveal::All`
     /// should not be used by checks which may expose
     /// type equality or type contents to the user.
-    /// There are some exceptions, e.g., around OIBITS and
+    /// There are some exceptions, e.g., around auto traits and
     /// transmute-checking, which expose some details, but
     /// not the whole concrete type of the `impl Trait`.
     All,

compiler/rustc_mir_build/src/build/expr/as_rvalue.rs

@@ -96,7 +96,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             ExprKind::Box { value } => {
                 let value = this.hir.mirror(value);
                 // The `Box<T>` temporary created here is not a part of the HIR,
-                // and therefore is not considered during generator OIBIT
+                // and therefore is not considered during generator auto-trait
                 // determination. See the comment about `box` at `yield_in_scope`.
                 let result = this.local_decls.push(LocalDecl::new(expr.ty, expr_span).internal());
                 this.cfg.push(

compiler/rustc_span/src/symbol.rs

@@ -285,6 +285,7 @@ symbols! {
         attr_literals,
         attributes,
         augmented_assignments,
+        auto_traits,
         automatically_derived,
         avx512_target_feature,
         await_macro,

library/alloc/src/lib.rs

@@ -112,7 +112,8 @@
 #![feature(never_type)]
 #![feature(nll)]
 #![feature(nonnull_slice_from_raw_parts)]
-#![feature(optin_builtin_traits)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![feature(or_patterns)]
 #![feature(pattern)]
 #![feature(ptr_internals)]

library/core/src/lib.rs

@@ -119,7 +119,8 @@
 #![feature(nll)]
 #![feature(exhaustive_patterns)]
 #![feature(no_core)]
-#![feature(optin_builtin_traits)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![feature(or_patterns)]
 #![feature(prelude_import)]
 #![feature(repr_simd, platform_intrinsics)]

library/proc_macro/src/lib.rs

@@ -28,7 +28,8 @@
 #![feature(extern_types)]
 #![feature(in_band_lifetimes)]
 #![feature(negative_impls)]
-#![feature(optin_builtin_traits)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![feature(restricted_std)]
 #![feature(rustc_attrs)]
 #![feature(min_specialization)]

library/rtstartup/rsbegin.rs

@@ -9,10 +9,13 @@
 // headers or footers.
 //
 // Note that the actual module entry point is located in the C runtime startup
-// object (usually called `crtX.o), which then invokes initialization callbacks
+// object (usually called `crtX.o`), which then invokes initialization callbacks
 // of other runtime components (registered via yet another special image section).
 
-#![feature(no_core, lang_items, optin_builtin_traits)]
+#![feature(no_core)]
+#![feature(lang_items)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![crate_type = "rlib"]
 #![no_core]
 #![allow(non_camel_case_types)]

library/rtstartup/rsend.rs

@@ -1,6 +1,9 @@
 // See rsbegin.rs for details.
 
-#![feature(no_core, lang_items, optin_builtin_traits)]
+#![feature(no_core)]
+#![feature(lang_items)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![crate_type = "rlib"]
 #![no_core]
 

library/std/src/lib.rs

@@ -286,7 +286,8 @@
 #![feature(nll)]
 #![feature(nonnull_slice_from_raw_parts)]
 #![feature(once_cell)]
-#![feature(optin_builtin_traits)]
+#![cfg_attr(bootstrap, feature(optin_builtin_traits))]
+#![cfg_attr(not(bootstrap), feature(auto_traits))]
 #![feature(or_patterns)]
 #![feature(panic_info_message)]
 #![feature(panic_internals)]

src/doc/unstable-book/src/language-features/optin-builtin-traits.md → src/doc/unstable-book/src/language-features/auto-traits.md

@@ -1,12 +1,12 @@
-# `optin_builtin_traits`
+# `auto_traits`
 
 The tracking issue for this feature is [#13231] 
 
 [#13231]: https://github.com/rust-lang/rust/issues/13231
 
 ----
 
-The `optin_builtin_traits` feature gate allows you to define auto traits.
+The `auto_traits` feature gate allows you to define auto traits.
 
 Auto traits, like [`Send`] or [`Sync`] in the standard library, are marker traits
 that are automatically implemented for every type, unless the type, or a type it contains, 
@@ -24,7 +24,7 @@ Example:
 
 ```rust
 #![feature(negative_impls)]
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Valid {}
 

src/test/pretty/auto-trait.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 // pp-exact
 

src/test/run-make-fulldeps/simd-ffi/simd.rs

@@ -2,7 +2,7 @@
 #![crate_type = "lib"]
 // we can compile to a variety of platforms, because we don't need
 // cross-compiled standard libraries.
-#![feature(no_core, optin_builtin_traits)]
+#![feature(no_core, auto_traits)]
 #![no_core]
 #![feature(repr_simd, simd_ffi, link_llvm_intrinsics, lang_items, rustc_attrs)]
 

src/test/run-make-fulldeps/target-specs/foo.rs

@@ -1,4 +1,4 @@
-#![feature(lang_items, no_core, optin_builtin_traits)]
+#![feature(lang_items, no_core, auto_traits)]
 #![no_core]
 
 #[lang="copy"]

src/test/rustdoc/auto-traits.rs

@@ -1,6 +1,6 @@
 // aux-build:auto-traits.rs
 
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 #![crate_name = "foo"]
 

src/test/rustdoc/auto_aliases.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 // @has auto_aliases/trait.Bar.html '//h3[@aliases="auto_aliases::Foo"]' 'impl Bar for Foo'
 pub struct Foo;

src/test/rustdoc/auxiliary/auto-traits.rs

@@ -1,3 +1,3 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 pub unsafe auto trait Bar {}

src/test/rustdoc/auxiliary/rustdoc-default-impl.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 pub mod bar {
     use std::marker;

src/test/rustdoc/auxiliary/rustdoc-impl-parts-crosscrate.rs

@@ -1,3 +1,3 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
-pub auto trait AnOibit {}
+pub auto trait AnAutoTrait {}

src/test/rustdoc/impl-parts-crosscrate.rs

@@ -12,9 +12,9 @@ pub struct Bar<T> { t: T }
 // full impl string.  Instead, just make sure something from each part
 // is mentioned.
 
-// @has implementors/rustdoc_impl_parts_crosscrate/trait.AnOibit.js Bar
+// @has implementors/rustdoc_impl_parts_crosscrate/trait.AnAutoTrait.js Bar
 // @has - Send
-// @has - !AnOibit
+// @has - !AnAutoTrait
 // @has - Copy
-impl<T: Send> !rustdoc_impl_parts_crosscrate::AnOibit for Bar<T>
+impl<T: Send> !rustdoc_impl_parts_crosscrate::AnAutoTrait for Bar<T>
     where T: Copy {}

src/test/rustdoc/impl-parts.rs

@@ -1,12 +1,12 @@
 #![feature(negative_impls)]
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
-pub auto trait AnOibit {}
+pub auto trait AnAutoTrait {}
 
 pub struct Foo<T> { field: T }
 
 // @has impl_parts/struct.Foo.html '//*[@class="impl"]//code' \
-//     "impl<T: Clone> !AnOibit for Foo<T> where T: Sync,"
-// @has impl_parts/trait.AnOibit.html '//*[@class="item-list"]//code' \
-//     "impl<T: Clone> !AnOibit for Foo<T> where T: Sync,"
-impl<T: Clone> !AnOibit for Foo<T> where T: Sync {}
+//     "impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync,"
+// @has impl_parts/trait.AnAutoTrait.html '//*[@class="item-list"]//code' \
+//     "impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync,"
+impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync {}

src/test/rustdoc/synthetic_auto/crate-local.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 pub auto trait Banana {}
 

src/test/ui/async-await/issue-64130-3-other.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 // edition:2018
 

src/test/ui/auto-traits/auto-trait-validation.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 
 auto trait Generic<T> {}
 //~^ auto traits cannot have generic parameters [E0567]

src/test/ui/auto-traits/auto-traits.rs

@@ -1,6 +1,6 @@
 // run-pass
 #![allow(unused_doc_comments)]
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 auto trait Auto {}

src/test/ui/auto-traits/issue-23080-2.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 unsafe auto trait Trait {

src/test/ui/auto-traits/issue-23080.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 unsafe auto trait Trait {

src/test/ui/auto-traits/typeck-auto-trait-no-supertraits-2.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 auto trait Magic : Sized where Option<Self> : Magic {} //~ ERROR E0568

src/test/ui/auto-traits/typeck-auto-trait-no-supertraits.rs

@@ -22,7 +22,7 @@
 //    println!("{:?} {:?}", a, b);
 // }
 
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 auto trait Magic: Copy {} //~ ERROR E0568

src/test/ui/auto-traits/typeck-default-trait-impl-constituent-types-2.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 auto trait MyTrait {}

src/test/ui/auto-traits/typeck-default-trait-impl-constituent-types.rs

@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(auto_traits)]
 #![feature(negative_impls)]
 
 auto trait MyTrait {}