1 //! List of the removed feature gates.
3 use crate::symbol::sym;
4 use super::{State, Feature};
6 macro_rules! declare_features {
8 $(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, None, $reason:expr),
10 /// Represents unstable features which have since been removed (it was once Active)
11 pub const REMOVED_FEATURES: &[Feature] = &[
14 state: State::Removed { reason: $reason },
19 description: concat!($($doc,)*),
26 $(#[doc = $doc:tt])* (stable_removed, $feature:ident, $ver:expr, $issue:expr, None),
28 /// Represents stable features which have since been removed (it was once Accepted)
29 pub const STABLE_REMOVED_FEATURES: &[Feature] = &[
32 state: State::Stabilized { reason: None },
37 description: concat!($($doc,)*),
45 // -------------------------------------------------------------------------
46 // feature-group-start: removed features
47 // -------------------------------------------------------------------------
49 (removed, import_shadowing, "1.0.0", None, None, None),
50 (removed, managed_boxes, "1.0.0", None, None, None),
51 /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8
52 (removed, negate_unsigned, "1.0.0", Some(29645), None, None),
53 (removed, reflect, "1.0.0", Some(27749), None, None),
54 /// A way to temporarily opt out of opt in copy. This will *never* be accepted.
55 (removed, opt_out_copy, "1.0.0", None, None, None),
56 (removed, quad_precision_float, "1.0.0", None, None, None),
57 (removed, struct_inherit, "1.0.0", None, None, None),
58 (removed, test_removed_feature, "1.0.0", None, None, None),
59 (removed, visible_private_types, "1.0.0", None, None, None),
60 (removed, unsafe_no_drop_flag, "1.0.0", None, None, None),
61 /// Allows using items which are missing stability attributes
62 (removed, unmarked_api, "1.0.0", None, None, None),
63 (removed, allocator, "1.0.0", None, None, None),
64 (removed, simd, "1.0.0", Some(27731), None,
65 Some("removed in favor of `#[repr(simd)]`")),
66 (removed, advanced_slice_patterns, "1.0.0", Some(62254), None,
67 Some("merged into `#![feature(slice_patterns)]`")),
68 (removed, macro_reexport, "1.0.0", Some(29638), None,
69 Some("subsumed by `pub use`")),
70 (removed, pushpop_unsafe, "1.2.0", None, None, None),
71 (removed, needs_allocator, "1.4.0", Some(27389), None,
72 Some("subsumed by `#![feature(allocator_internals)]`")),
73 (removed, proc_macro_mod, "1.27.0", Some(54727), None,
74 Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
75 (removed, proc_macro_expr, "1.27.0", Some(54727), None,
76 Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
77 (removed, proc_macro_non_items, "1.27.0", Some(54727), None,
78 Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
79 (removed, proc_macro_gen, "1.27.0", Some(54727), None,
80 Some("subsumed by `#![feature(proc_macro_hygiene)]`")),
81 (removed, panic_implementation, "1.28.0", Some(44489), None,
82 Some("subsumed by `#[panic_handler]`")),
83 /// Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`.
84 (removed, custom_derive, "1.32.0", Some(29644), None,
85 Some("subsumed by `#[proc_macro_derive]`")),
86 /// Paths of the form: `extern::foo::bar`
87 (removed, extern_in_paths, "1.33.0", Some(55600), None,
88 Some("subsumed by `::foo::bar` paths")),
89 (removed, quote, "1.33.0", Some(29601), None, None),
90 /// Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238).
91 (removed, dropck_parametricity, "1.38.0", Some(28498), None, None),
92 (removed, await_macro, "1.38.0", Some(50547), None,
93 Some("subsumed by `.await` syntax")),
94 /// Allows defining `existential type`s.
95 (removed, existential_type, "1.38.0", Some(63063), None,
96 Some("removed in favor of `#![feature(type_alias_impl_trait)]`")),
97 /// Allows using the macros:
98 /// + `__diagnostic_used`
99 /// + `__register_diagnostic`
100 /// +`__build_diagnostic_array`
101 (removed, rustc_diagnostic_macros, "1.38.0", None, None, None),
103 // -------------------------------------------------------------------------
104 // feature-group-end: removed features
105 // -------------------------------------------------------------------------
109 (stable_removed, no_stack_check, "1.0.0", None, None),