syntax: extract `removed.rs` feature gates.

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 32fef2fc8ddb7a5e4058cc07aff87ca9d12b7646..e2fa4b27f283393bd63571c77e0506b8e6e25561 100644 (file)
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -14,6 +14,8 @@
 
 mod accepted;
 use accepted::ACCEPTED_FEATURES;
+mod removed;
+use removed::{REMOVED_FEATURES, STABLE_REMOVED_FEATURES};
 
 use AttributeType::*;
 use AttributeGate::*;
@@ -83,20 +85,6 @@ pub fn walk_feature_fields<F>(&self, mut f: F)
             }
         }
     };
-
-    ($((removed, $feature: ident, $ver: expr, $issue: expr, None, $reason: expr),)+) => {
-        /// Represents unstable features which have since been removed (it was once Active)
-        const REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[
-            $((sym::$feature, $ver, $issue, $reason)),+
-        ];
-    };
-
-    ($((stable_removed, $feature: ident, $ver: expr, $issue: expr, None),)+) => {
-        /// Represents stable features which have since been removed (it was once Accepted)
-        const STABLE_REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[
-            $((sym::$feature, $ver, $issue, None)),+
-        ];
-    };
 }
 
 // If you change this, please modify `src/doc/unstable-book` as well.
@@ -571,69 +559,6 @@ pub fn walk_feature_fields<F>(&self, mut f: F)
     sym::let_chains,
 ];
 
-declare_features! (
-    // -------------------------------------------------------------------------
-    // feature-group-start: removed features
-    // -------------------------------------------------------------------------
-
-    (removed, import_shadowing, "1.0.0", None, None, None),
-    (removed, managed_boxes, "1.0.0", None, None, None),
-    // Allows use of unary negate on unsigned integers, e.g., -e for e: u8
-    (removed, negate_unsigned, "1.0.0", Some(29645), None, None),
-    (removed, reflect, "1.0.0", Some(27749), None, None),
-    // A way to temporarily opt out of opt in copy. This will *never* be accepted.
-    (removed, opt_out_copy, "1.0.0", None, None, None),
-    (removed, quad_precision_float, "1.0.0", None, None, None),
-    (removed, struct_inherit, "1.0.0", None, None, None),
-    (removed, test_removed_feature, "1.0.0", None, None, None),
-    (removed, visible_private_types, "1.0.0", None, None, None),
-    (removed, unsafe_no_drop_flag, "1.0.0", None, None, None),
-    // Allows using items which are missing stability attributes
-    (removed, unmarked_api, "1.0.0", None, None, None),
-    (removed, allocator, "1.0.0", None, None, None),
-    (removed, simd, "1.0.0", Some(27731), None,
-     Some("removed in favor of `#[repr(simd)]`")),
-    (removed, advanced_slice_patterns, "1.0.0", Some(62254), None,
-     Some("merged into `#![feature(slice_patterns)]`")),
-    (removed, macro_reexport, "1.0.0", Some(29638), None,
-     Some("subsumed by `pub use`")),
-    (removed, pushpop_unsafe, "1.2.0", None, None, None),
-    (removed, needs_allocator, "1.4.0", Some(27389), None,
-     Some("subsumed by `#![feature(allocator_internals)]`")),
-    (removed, proc_macro_mod, "1.27.0", Some(54727), None,
-     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
-    (removed, proc_macro_expr, "1.27.0", Some(54727), None,
-     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
-    (removed, proc_macro_non_items, "1.27.0", Some(54727), None,
-     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
-    (removed, proc_macro_gen, "1.27.0", Some(54727), None,
-     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
-    (removed, panic_implementation, "1.28.0", Some(44489), None,
-     Some("subsumed by `#[panic_handler]`")),
-    // Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`.
-    (removed, custom_derive, "1.32.0", Some(29644), None,
-     Some("subsumed by `#[proc_macro_derive]`")),
-    // Paths of the form: `extern::foo::bar`
-    (removed, extern_in_paths, "1.33.0", Some(55600), None,
-     Some("subsumed by `::foo::bar` paths")),
-    (removed, quote, "1.33.0", Some(29601), None, None),
-    // Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238).
-    (removed, dropck_parametricity, "1.38.0", Some(28498), None, None),
-    (removed, await_macro, "1.38.0", Some(50547), None,
-     Some("subsumed by `.await` syntax")),
-    // Allows defining `existential type`s.
-    (removed, existential_type, "1.38.0", Some(63063), None,
-     Some("removed in favor of `#![feature(type_alias_impl_trait)]`")),
-
-    // -------------------------------------------------------------------------
-    // feature-group-end: removed features
-    // -------------------------------------------------------------------------
-);
-
-declare_features! (
-    (stable_removed, no_stack_check, "1.0.0", None, None),
-);
-
 // If you change this, please modify `src/doc/unstable-book` as well. You must
 // move that documentation into the relevant place in the other docs, and
 // remove the chapter on the flag.

diff --git a/src/libsyntax/feature_gate/attr.rs b/src/libsyntax/feature_gate/attr.rs
new file mode 100644 (file)
index 0000000..46330df
--- /dev/null
+++ b/src/libsyntax/feature_gate/attr.rs
@@ -0,0 +1 @@
+//! TODO

diff --git a/src/libsyntax/feature_gate/removed.rs b/src/libsyntax/feature_gate/removed.rs
new file mode 100644 (file)
index 0000000..6ebfeb2
--- /dev/null
+++ b/src/libsyntax/feature_gate/removed.rs
@@ -0,0 +1,82 @@
+//! List of the removed feature gates.
+
+use crate::symbol::{Symbol, sym};
+
+macro_rules! declare_features {
+    ($((removed, $feature: ident, $ver: expr, $issue: expr, None, $reason: expr),)+) => {
+        /// Represents unstable features which have since been removed (it was once Active)
+        pub const REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[
+            $((sym::$feature, $ver, $issue, $reason)),+
+        ];
+    };
+
+    ($((stable_removed, $feature: ident, $ver: expr, $issue: expr, None),)+) => {
+        /// Represents stable features which have since been removed (it was once Accepted)
+        pub const STABLE_REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[
+            $((sym::$feature, $ver, $issue, None)),+
+        ];
+    };
+}
+
+declare_features! (
+    // -------------------------------------------------------------------------
+    // feature-group-start: removed features
+    // -------------------------------------------------------------------------
+
+    (removed, import_shadowing, "1.0.0", None, None, None),
+    (removed, managed_boxes, "1.0.0", None, None, None),
+    // Allows use of unary negate on unsigned integers, e.g., -e for e: u8
+    (removed, negate_unsigned, "1.0.0", Some(29645), None, None),
+    (removed, reflect, "1.0.0", Some(27749), None, None),
+    // A way to temporarily opt out of opt in copy. This will *never* be accepted.
+    (removed, opt_out_copy, "1.0.0", None, None, None),
+    (removed, quad_precision_float, "1.0.0", None, None, None),
+    (removed, struct_inherit, "1.0.0", None, None, None),
+    (removed, test_removed_feature, "1.0.0", None, None, None),
+    (removed, visible_private_types, "1.0.0", None, None, None),
+    (removed, unsafe_no_drop_flag, "1.0.0", None, None, None),
+    // Allows using items which are missing stability attributes
+    (removed, unmarked_api, "1.0.0", None, None, None),
+    (removed, allocator, "1.0.0", None, None, None),
+    (removed, simd, "1.0.0", Some(27731), None,
+     Some("removed in favor of `#[repr(simd)]`")),
+    (removed, advanced_slice_patterns, "1.0.0", Some(62254), None,
+     Some("merged into `#![feature(slice_patterns)]`")),
+    (removed, macro_reexport, "1.0.0", Some(29638), None,
+     Some("subsumed by `pub use`")),
+    (removed, pushpop_unsafe, "1.2.0", None, None, None),
+    (removed, needs_allocator, "1.4.0", Some(27389), None,
+     Some("subsumed by `#![feature(allocator_internals)]`")),
+    (removed, proc_macro_mod, "1.27.0", Some(54727), None,
+     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
+    (removed, proc_macro_expr, "1.27.0", Some(54727), None,
+     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
+    (removed, proc_macro_non_items, "1.27.0", Some(54727), None,
+     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
+    (removed, proc_macro_gen, "1.27.0", Some(54727), None,
+     Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
+    (removed, panic_implementation, "1.28.0", Some(44489), None,
+     Some("subsumed by `#[panic_handler]`")),
+    // Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`.
+    (removed, custom_derive, "1.32.0", Some(29644), None,
+     Some("subsumed by `#[proc_macro_derive]`")),
+    // Paths of the form: `extern::foo::bar`
+    (removed, extern_in_paths, "1.33.0", Some(55600), None,
+     Some("subsumed by `::foo::bar` paths")),
+    (removed, quote, "1.33.0", Some(29601), None, None),
+    // Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238).
+    (removed, dropck_parametricity, "1.38.0", Some(28498), None, None),
+    (removed, await_macro, "1.38.0", Some(50547), None,
+     Some("subsumed by `.await` syntax")),
+    // Allows defining `existential type`s.
+    (removed, existential_type, "1.38.0", Some(63063), None,
+     Some("removed in favor of `#![feature(type_alias_impl_trait)]`")),
+
+    // -------------------------------------------------------------------------
+    // feature-group-end: removed features
+    // -------------------------------------------------------------------------
+);
+
+declare_features! (
+    (stable_removed, no_stack_check, "1.0.0", None, None),
+);