--- /dev/null
+//! List of the removed feature gates.
+
+use super::{to_nonzero, Feature, State};
+use rustc_span::symbol::sym;
+
+macro_rules! declare_features {
+ ($(
+ $(#[doc = $doc:tt])* (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: &[Feature] = &[
+ $(
+ Feature {
+ state: State::Removed { reason: $reason },
+ name: sym::$feature,
+ since: $ver,
+ issue: to_nonzero($issue),
+ edition: None,
+ description: concat!($($doc,)*),
+ }
+ ),+
+ ];
+ };
+
+ ($(
+ $(#[doc = $doc:tt])* (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: &[Feature] = &[
+ $(
+ Feature {
+ state: State::Stabilized { reason: None },
+ name: sym::$feature,
+ since: $ver,
+ issue: to_nonzero($issue),
+ edition: None,
+ description: concat!($($doc,)*),
+ }
+ ),+
+ ];
+ };
+}
+
+#[rustfmt::skip]
+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`")),
+ /// 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)]`")),
+ /// Allows identifying crates that contain sanitizer runtimes.
+ (removed, sanitizer_runtime, "1.17.0", None, None, None),
+ (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 `[x; N]` where `x` is a constant (RFC 2203).
+ (removed, const_in_array_repeat_expressions, "1.37.0", Some(49147), None,
+ Some("removed due to causing promotable bugs")),
+ /// 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)]`")),
+ /// Allows using the macros:
+ /// + `__diagnostic_used`
+ /// + `__register_diagnostic`
+ /// +`__build_diagnostic_array`
+ (removed, rustc_diagnostic_macros, "1.38.0", None, None, None),
+ /// Allows using `#[on_unimplemented(..)]` on traits.
+ /// (Moved to `rustc_attrs`.)
+ (removed, on_unimplemented, "1.40.0", None, None, None),
+ /// Allows overlapping impls of marker traits.
+ (removed, overlapping_marker_traits, "1.42.0", Some(29864), None,
+ 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")),
+
+ // -------------------------------------------------------------------------
+ // feature-group-end: removed features
+ // -------------------------------------------------------------------------
+);
+
+#[rustfmt::skip]
+declare_features! (
+ (stable_removed, no_stack_check, "1.0.0", None, None),
+);
projects / rustc.git / blobdiff