| //! Built-in attributes and `cfg` flag gating. |
| |
| use AttributeType::*; |
| use AttributeGate::*; |
| |
| use crate::{Features, Stability}; |
| |
| use rustc_data_structures::fx::FxHashMap; |
| use syntax_pos::symbol::{Symbol, sym}; |
| use lazy_static::lazy_static; |
| |
| type GateFn = fn(&Features) -> bool; |
| |
| macro_rules! cfg_fn { |
| ($field: ident) => { |
| (|features| { features.$field }) as GateFn |
| } |
| } |
| |
| pub type GatedCfg = (Symbol, Symbol, GateFn); |
| |
| /// `cfg(...)`'s that are feature gated. |
| const GATED_CFGS: &[GatedCfg] = &[ |
| // (name in cfg, feature, function to check if the feature is enabled) |
| (sym::target_thread_local, sym::cfg_target_thread_local, cfg_fn!(cfg_target_thread_local)), |
| (sym::target_has_atomic, sym::cfg_target_has_atomic, cfg_fn!(cfg_target_has_atomic)), |
| (sym::target_has_atomic_load_store, sym::cfg_target_has_atomic, cfg_fn!(cfg_target_has_atomic)), |
| (sym::sanitize, sym::cfg_sanitize, cfg_fn!(cfg_sanitize)), |
| ]; |
| |
| /// Find a gated cfg determined by the `pred`icate which is given the cfg's name. |
| pub fn find_gated_cfg(pred: impl Fn(Symbol) -> bool) -> Option<&'static GatedCfg> { |
| GATED_CFGS.iter().find(|(cfg_sym, ..)| pred(*cfg_sym)) |
| } |
| |
| // 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. |
| |
| #[derive(Copy, Clone, PartialEq, Debug)] |
| pub enum AttributeType { |
| /// Normal, builtin attribute that is consumed |
| /// by the compiler before the unused_attribute check |
| Normal, |
| |
| /// Builtin attribute that may not be consumed by the compiler |
| /// before the unused_attribute check. These attributes |
| /// will be ignored by the unused_attribute lint |
| Whitelisted, |
| |
| /// Builtin attribute that is only allowed at the crate level |
| CrateLevel, |
| } |
| |
| #[derive(Clone, Copy)] |
| pub enum AttributeGate { |
| /// Is gated by a given feature gate, reason |
| /// and function to check if enabled |
| Gated(Stability, Symbol, &'static str, fn(&Features) -> bool), |
| |
| /// Ungated attribute, can be used on all release channels |
| Ungated, |
| } |
| |
| // fn() is not Debug |
| impl std::fmt::Debug for AttributeGate { |
| fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { |
| match *self { |
| Self::Gated(ref stab, name, expl, _) => |
| write!(fmt, "Gated({:?}, {}, {})", stab, name, expl), |
| Self::Ungated => write!(fmt, "Ungated") |
| } |
| } |
| } |
| |
| impl AttributeGate { |
| fn is_deprecated(&self) -> bool { |
| match *self { |
| Self::Gated(Stability::Deprecated(_, _), ..) => true, |
| _ => false, |
| } |
| } |
| } |
| |
| /// A template that the attribute input must match. |
| /// Only top-level shape (`#[attr]` vs `#[attr(...)]` vs `#[attr = ...]`) is considered now. |
| #[derive(Clone, Copy)] |
| pub struct AttributeTemplate { |
| pub word: bool, |
| pub list: Option<&'static str>, |
| pub name_value_str: Option<&'static str>, |
| } |
| |
| impl AttributeTemplate { |
| pub fn only_word() -> Self { |
| Self { word: true, list: None, name_value_str: None } |
| } |
| } |
| |
| /// A convenience macro for constructing attribute templates. |
| /// E.g., `template!(Word, List: "description")` means that the attribute |
| /// supports forms `#[attr]` and `#[attr(description)]`. |
| macro_rules! template { |
| (Word) => { template!(@ true, None, None) }; |
| (List: $descr: expr) => { template!(@ false, Some($descr), None) }; |
| (NameValueStr: $descr: expr) => { template!(@ false, None, Some($descr)) }; |
| (Word, List: $descr: expr) => { template!(@ true, Some($descr), None) }; |
| (Word, NameValueStr: $descr: expr) => { template!(@ true, None, Some($descr)) }; |
| (List: $descr1: expr, NameValueStr: $descr2: expr) => { |
| template!(@ false, Some($descr1), Some($descr2)) |
| }; |
| (Word, List: $descr1: expr, NameValueStr: $descr2: expr) => { |
| template!(@ true, Some($descr1), Some($descr2)) |
| }; |
| (@ $word: expr, $list: expr, $name_value_str: expr) => { AttributeTemplate { |
| word: $word, list: $list, name_value_str: $name_value_str |
| } }; |
| } |
| |
| macro_rules! ungated { |
| ($attr:ident, $typ:expr, $tpl:expr $(,)?) => { |
| (sym::$attr, $typ, $tpl, Ungated) |
| }; |
| } |
| |
| macro_rules! gated { |
| ($attr:ident, $typ:expr, $tpl:expr, $gate:ident, $msg:expr $(,)?) => { |
| (sym::$attr, $typ, $tpl, Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate))) |
| }; |
| ($attr:ident, $typ:expr, $tpl:expr, $msg:expr $(,)?) => { |
| (sym::$attr, $typ, $tpl, Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr))) |
| }; |
| } |
| |
| macro_rules! rustc_attr { |
| (TEST, $attr:ident, $typ:expr, $tpl:expr $(,)?) => { |
| rustc_attr!( |
| $attr, $typ, $tpl, |
| concat!("the `#[", stringify!($attr), "]` attribute is just used for rustc unit tests \ |
| and will never be stable", |
| ), |
| ) |
| }; |
| ($attr:ident, $typ:expr, $tpl:expr, $msg:expr $(,)?) => { |
| (sym::$attr, $typ, $tpl, |
| Gated(Stability::Unstable, sym::rustc_attrs, $msg, cfg_fn!(rustc_attrs))) |
| }; |
| } |
| |
| macro_rules! experimental { |
| ($attr:ident) => { |
| concat!("the `#[", stringify!($attr), "]` attribute is an experimental feature") |
| } |
| } |
| |
| const IMPL_DETAIL: &str = "internal implementation detail"; |
| const INTERNAL_UNSTABLE: &str = "this is an internal attribute that will never be stable"; |
| |
| pub type BuiltinAttribute = (Symbol, AttributeType, AttributeTemplate, AttributeGate); |
| |
| /// Attributes that have a special meaning to rustc or rustdoc. |
| pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ |
| // ========================================================================== |
| // Stable attributes: |
| // ========================================================================== |
| |
| // Condtional compilation: |
| ungated!(cfg, Normal, template!(List: "predicate")), |
| ungated!(cfg_attr, Normal, template!(List: "predicate, attr1, attr2, ...")), |
| |
| // Testing: |
| ungated!(ignore, Normal, template!(Word, NameValueStr: "reason")), |
| ungated!( |
| should_panic, Normal, |
| template!(Word, List: r#"expected = "reason"#, NameValueStr: "reason"), |
| ), |
| // FIXME(Centril): This can be used on stable but shouldn't. |
| ungated!(reexport_test_harness_main, Normal, template!(NameValueStr: "name")), |
| |
| // Macros: |
| ungated!(derive, Normal, template!(List: "Trait1, Trait2, ...")), |
| ungated!(automatically_derived, Normal, template!(Word)), |
| // FIXME(#14407) |
| ungated!(macro_use, Normal, template!(Word, List: "name1, name2, ...")), |
| ungated!(macro_escape, Normal, template!(Word)), // Deprecated synonym for `macro_use`. |
| ungated!(macro_export, Normal, template!(Word, List: "local_inner_macros")), |
| ungated!(proc_macro, Normal, template!(Word)), |
| ungated!( |
| proc_macro_derive, Normal, |
| template!(List: "TraitName, /*opt*/ attributes(name1, name2, ...)"), |
| ), |
| ungated!(proc_macro_attribute, Normal, template!(Word)), |
| |
| // Lints: |
| ungated!(warn, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), |
| ungated!(allow, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), |
| ungated!(forbid, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), |
| ungated!(deny, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), |
| ungated!(must_use, Whitelisted, template!(Word, NameValueStr: "reason")), |
| // FIXME(#14407) |
| ungated!( |
| deprecated, Normal, |
| template!( |
| Word, |
| List: r#"/*opt*/ since = "version", /*opt*/ note = "reason""#, |
| NameValueStr: "reason" |
| ), |
| ), |
| |
| // Crate properties: |
| ungated!(crate_name, CrateLevel, template!(NameValueStr: "name")), |
| ungated!(crate_type, CrateLevel, template!(NameValueStr: "bin|lib|...")), |
| ungated!(crate_id, CrateLevel, template!(NameValueStr: "ignored")), |
| |
| // ABI, linking, symbols, and FFI |
| ungated!( |
| link, Whitelisted, |
| template!(List: r#"name = "...", /*opt*/ kind = "dylib|static|...", /*opt*/ cfg = "...""#), |
| ), |
| ungated!(link_name, Whitelisted, template!(NameValueStr: "name")), |
| ungated!(no_link, Normal, template!(Word)), |
| ungated!(repr, Normal, template!(List: "C")), |
| ungated!(export_name, Whitelisted, template!(NameValueStr: "name")), |
| ungated!(link_section, Whitelisted, template!(NameValueStr: "name")), |
| ungated!(no_mangle, Whitelisted, template!(Word)), |
| ungated!(used, Whitelisted, template!(Word)), |
| |
| // Limits: |
| ungated!(recursion_limit, CrateLevel, template!(NameValueStr: "N")), |
| ungated!(type_length_limit, CrateLevel, template!(NameValueStr: "N")), |
| |
| // Entry point: |
| ungated!(main, Normal, template!(Word)), |
| ungated!(start, Normal, template!(Word)), |
| ungated!(no_start, CrateLevel, template!(Word)), |
| ungated!(no_main, CrateLevel, template!(Word)), |
| |
| // Modules, prelude, and resolution: |
| ungated!(path, Normal, template!(NameValueStr: "file")), |
| ungated!(no_std, CrateLevel, template!(Word)), |
| ungated!(no_implicit_prelude, Normal, template!(Word)), |
| ungated!(non_exhaustive, Whitelisted, template!(Word)), |
| |
| // Runtime |
| ungated!(windows_subsystem, Whitelisted, template!(NameValueStr: "windows|console")), |
| ungated!(panic_handler, Normal, template!(Word)), // RFC 2070 |
| |
| // Code generation: |
| ungated!(inline, Whitelisted, template!(Word, List: "always|never")), |
| ungated!(cold, Whitelisted, template!(Word)), |
| ungated!(no_builtins, Whitelisted, template!(Word)), |
| ungated!(target_feature, Whitelisted, template!(List: r#"enable = "name""#)), |
| |
| // FIXME: #14408 whitelist docs since rustdoc looks at them |
| ungated!(doc, Whitelisted, template!(List: "hidden|inline|...", NameValueStr: "string")), |
| |
| // ========================================================================== |
| // Unstable attributes: |
| // ========================================================================== |
| |
| // Linking: |
| gated!(naked, Whitelisted, template!(Word), naked_functions, experimental!(naked)), |
| gated!( |
| link_args, Normal, template!(NameValueStr: "args"), |
| "the `link_args` attribute is experimental and not portable across platforms, \ |
| it is recommended to use `#[link(name = \"foo\")] instead", |
| ), |
| gated!( |
| link_ordinal, Whitelisted, template!(List: "ordinal"), raw_dylib, |
| experimental!(link_ordinal) |
| ), |
| |
| // Plugins: |
| ( |
| sym::plugin_registrar, Normal, template!(Word), |
| Gated( |
| Stability::Deprecated( |
| "https://github.com/rust-lang/rust/pull/64675", |
| Some("may be removed in a future compiler version"), |
| ), |
| sym::plugin_registrar, |
| "compiler plugins are deprecated", |
| cfg_fn!(plugin_registrar) |
| ) |
| ), |
| ( |
| sym::plugin, CrateLevel, template!(List: "name"), |
| Gated( |
| Stability::Deprecated( |
| "https://github.com/rust-lang/rust/pull/64675", |
| Some("may be removed in a future compiler version"), |
| ), |
| sym::plugin, |
| "compiler plugins are deprecated", |
| cfg_fn!(plugin) |
| ) |
| ), |
| |
| // Testing: |
| gated!(allow_fail, Normal, template!(Word), experimental!(allow_fail)), |
| gated!( |
| test_runner, CrateLevel, template!(List: "path"), custom_test_frameworks, |
| "custom test frameworks are an unstable feature", |
| ), |
| // RFC #1268 |
| gated!(marker, Normal, template!(Word), marker_trait_attr, experimental!(marker)), |
| gated!( |
| thread_local, Whitelisted, template!(Word), |
| "`#[thread_local]` is an experimental feature, and does not currently handle destructors", |
| ), |
| gated!(no_core, CrateLevel, template!(Word), experimental!(no_core)), |
| // RFC 2412 |
| gated!( |
| optimize, Whitelisted, template!(List: "size|speed"), optimize_attribute, |
| experimental!(optimize), |
| ), |
| |
| gated!(ffi_returns_twice, Whitelisted, template!(Word), experimental!(ffi_returns_twice)), |
| gated!(track_caller, Whitelisted, template!(Word), experimental!(track_caller)), |
| gated!( |
| register_attr, CrateLevel, template!(List: "attr1, attr2, ..."), |
| experimental!(register_attr), |
| ), |
| gated!( |
| register_tool, CrateLevel, template!(List: "tool1, tool2, ..."), |
| experimental!(register_tool), |
| ), |
| |
| // ========================================================================== |
| // Internal attributes: Stability, deprecation, and unsafe: |
| // ========================================================================== |
| |
| ungated!(feature, CrateLevel, template!(List: "name1, name1, ...")), |
| // FIXME(#14407) -- only looked at on-demand so we can't |
| // guarantee they'll have already been checked. |
| ungated!( |
| rustc_deprecated, Whitelisted, |
| template!(List: r#"since = "version", reason = "...""#) |
| ), |
| // FIXME(#14407) |
| ungated!(stable, Whitelisted, template!(List: r#"feature = "name", since = "version""#)), |
| // FIXME(#14407) |
| ungated!( |
| unstable, Whitelisted, |
| template!(List: r#"feature = "name", reason = "...", issue = "N""#), |
| ), |
| gated!( |
| rustc_const_unstable, Normal, template!(List: r#"feature = "name""#), |
| "the `#[rustc_const_unstable]` attribute is an internal feature", |
| ), |
| gated!( |
| allow_internal_unstable, Normal, template!(Word, List: "feat1, feat2, ..."), |
| "allow_internal_unstable side-steps feature gating and stability checks", |
| ), |
| gated!( |
| allow_internal_unsafe, Normal, template!(Word), |
| "allow_internal_unsafe side-steps the unsafe_code lint", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes: Type system related: |
| // ========================================================================== |
| |
| gated!(fundamental, Whitelisted, template!(Word), experimental!(fundamental)), |
| gated!( |
| // RFC #1445. |
| structural_match, Whitelisted, template!(Word), |
| "the semantics of constant patterns is not yet settled", |
| ), |
| gated!( |
| may_dangle, Normal, template!(Word), dropck_eyepatch, |
| "`may_dangle` has unstable semantics and may be removed in the future", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes: Runtime related: |
| // ========================================================================== |
| |
| rustc_attr!(rustc_allocator, Whitelisted, template!(Word), IMPL_DETAIL), |
| rustc_attr!(rustc_allocator_nounwind, Whitelisted, template!(Word), IMPL_DETAIL), |
| gated!(alloc_error_handler, Normal, template!(Word), experimental!(alloc_error_handler)), |
| gated!( |
| default_lib_allocator, Whitelisted, template!(Word), allocator_internals, |
| experimental!(default_lib_allocator), |
| ), |
| gated!( |
| needs_allocator, Normal, template!(Word), allocator_internals, |
| experimental!(needs_allocator), |
| ), |
| gated!(panic_runtime, Whitelisted, template!(Word), experimental!(panic_runtime)), |
| gated!(needs_panic_runtime, Whitelisted, template!(Word), experimental!(needs_panic_runtime)), |
| gated!( |
| unwind, Whitelisted, template!(List: "allowed|aborts"), unwind_attributes, |
| experimental!(unwind), |
| ), |
| gated!( |
| compiler_builtins, Whitelisted, template!(Word), |
| "the `#[compiler_builtins]` attribute is used to identify the `compiler_builtins` crate \ |
| which contains compiler-rt intrinsics and will never be stable", |
| ), |
| gated!( |
| sanitizer_runtime, Whitelisted, template!(Word), |
| "the `#[sanitizer_runtime]` attribute is used to identify crates that contain the runtime \ |
| of a sanitizer and will never be stable", |
| ), |
| gated!( |
| profiler_runtime, Whitelisted, template!(Word), |
| "the `#[profiler_runtime]` attribute is used to identify the `profiler_builtins` crate \ |
| which contains the profiler runtime and will never be stable", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes, Linkage: |
| // ========================================================================== |
| |
| gated!( |
| linkage, Whitelisted, template!(NameValueStr: "external|internal|..."), |
| "the `linkage` attribute is experimental and not portable across platforms", |
| ), |
| rustc_attr!(rustc_std_internal_symbol, Whitelisted, template!(Word), INTERNAL_UNSTABLE), |
| |
| // ========================================================================== |
| // Internal attributes, Macro related: |
| // ========================================================================== |
| |
| rustc_attr!(rustc_builtin_macro, Whitelisted, template!(Word), IMPL_DETAIL), |
| rustc_attr!(rustc_proc_macro_decls, Normal, template!(Word), INTERNAL_UNSTABLE), |
| rustc_attr!( |
| rustc_macro_transparency, Whitelisted, |
| template!(NameValueStr: "transparent|semitransparent|opaque"), |
| "used internally for testing macro hygiene", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes, Diagnostics related: |
| // ========================================================================== |
| |
| rustc_attr!( |
| rustc_on_unimplemented, Whitelisted, |
| template!( |
| List: r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#, |
| NameValueStr: "message" |
| ), |
| INTERNAL_UNSTABLE |
| ), |
| // Whitelists "identity-like" conversion methods to suggest on type mismatch. |
| rustc_attr!(rustc_conversion_suggestion, Whitelisted, template!(Word), INTERNAL_UNSTABLE), |
| |
| // ========================================================================== |
| // Internal attributes, Const related: |
| // ========================================================================== |
| |
| rustc_attr!(rustc_promotable, Whitelisted, template!(Word), IMPL_DETAIL), |
| rustc_attr!(rustc_allow_const_fn_ptr, Whitelisted, template!(Word), IMPL_DETAIL), |
| rustc_attr!(rustc_args_required_const, Whitelisted, template!(List: "N"), INTERNAL_UNSTABLE), |
| |
| // ========================================================================== |
| // Internal attributes, Layout related: |
| // ========================================================================== |
| |
| rustc_attr!( |
| rustc_layout_scalar_valid_range_start, Whitelisted, template!(List: "value"), |
| "the `#[rustc_layout_scalar_valid_range_start]` attribute is just used to enable \ |
| niche optimizations in libcore and will never be stable", |
| ), |
| rustc_attr!( |
| rustc_layout_scalar_valid_range_end, Whitelisted, template!(List: "value"), |
| "the `#[rustc_layout_scalar_valid_range_end]` attribute is just used to enable \ |
| niche optimizations in libcore and will never be stable", |
| ), |
| rustc_attr!( |
| rustc_nonnull_optimization_guaranteed, Whitelisted, template!(Word), |
| "the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to enable \ |
| niche optimizations in libcore and will never be stable", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes, Misc: |
| // ========================================================================== |
| gated!( |
| lang, Normal, template!(NameValueStr: "name"), lang_items, |
| "language items are subject to change", |
| ), |
| ( |
| sym::rustc_diagnostic_item, |
| Normal, |
| template!(NameValueStr: "name"), |
| Gated( |
| Stability::Unstable, |
| sym::rustc_attrs, |
| "diagnostic items compiler internal support for linting", |
| cfg_fn!(rustc_attrs), |
| ), |
| ), |
| ( |
| sym::no_debug, Whitelisted, template!(Word), |
| Gated( |
| Stability::Deprecated("https://github.com/rust-lang/rust/issues/29721", None), |
| sym::no_debug, |
| "the `#[no_debug]` attribute was an experimental feature that has been \ |
| deprecated due to lack of demand", |
| cfg_fn!(no_debug) |
| ) |
| ), |
| gated!( |
| // Used in resolve: |
| prelude_import, Whitelisted, template!(Word), |
| "`#[prelude_import]` is for use by rustc only", |
| ), |
| gated!( |
| rustc_paren_sugar, Normal, template!(Word), unboxed_closures, |
| "unboxed_closures are still evolving", |
| ), |
| rustc_attr!( |
| rustc_inherit_overflow_checks, Whitelisted, template!(Word), |
| "the `#[rustc_inherit_overflow_checks]` attribute is just used to control \ |
| overflow checking behavior of several libcore functions that are inlined \ |
| across crates and will never be stable", |
| ), |
| rustc_attr!(rustc_reservation_impl, Normal, template!(NameValueStr: "reservation message"), |
| "the `#[rustc_reservation_impl]` attribute is internally used \ |
| for reserving for `for<T> From<!> for T` impl" |
| ), |
| rustc_attr!( |
| rustc_test_marker, Normal, template!(Word), |
| "the `#[rustc_test_marker]` attribute is used internally to track tests", |
| ), |
| |
| // ========================================================================== |
| // Internal attributes, Testing: |
| // ========================================================================== |
| |
| rustc_attr!(TEST, rustc_outlives, Normal, template!(Word)), |
| rustc_attr!(TEST, rustc_variance, Normal, template!(Word)), |
| rustc_attr!(TEST, rustc_layout, Normal, template!(List: "field1, field2, ...")), |
| rustc_attr!(TEST, rustc_regions, Normal, template!(Word)), |
| rustc_attr!( |
| TEST, rustc_error, Whitelisted, |
| template!(Word, List: "delay_span_bug_from_inside_query") |
| ), |
| rustc_attr!(TEST, rustc_dump_user_substs, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_if_this_changed, Whitelisted, template!(Word, List: "DepNode")), |
| rustc_attr!(TEST, rustc_then_this_would_need, Whitelisted, template!(List: "DepNode")), |
| rustc_attr!( |
| TEST, rustc_dirty, Whitelisted, |
| template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#), |
| ), |
| rustc_attr!( |
| TEST, rustc_clean, Whitelisted, |
| template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#), |
| ), |
| rustc_attr!( |
| TEST, rustc_partition_reused, Whitelisted, |
| template!(List: r#"cfg = "...", module = "...""#), |
| ), |
| rustc_attr!( |
| TEST, rustc_partition_codegened, Whitelisted, |
| template!(List: r#"cfg = "...", module = "...""#), |
| ), |
| rustc_attr!( |
| TEST, rustc_expected_cgu_reuse, Whitelisted, |
| template!(List: r#"cfg = "...", module = "...", kind = "...""#), |
| ), |
| rustc_attr!(TEST, rustc_synthetic, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_symbol_name, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_def_path, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_mir, Whitelisted, template!(List: "arg1, arg2, ...")), |
| rustc_attr!(TEST, rustc_dump_program_clauses, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_dump_env_program_clauses, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_object_lifetime_default, Whitelisted, template!(Word)), |
| rustc_attr!(TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/)), |
| gated!( |
| omit_gdb_pretty_printer_section, Whitelisted, template!(Word), |
| "the `#[omit_gdb_pretty_printer_section]` attribute is just used for the Rust test suite", |
| ), |
| ]; |
| |
| pub fn deprecated_attributes() -> Vec<&'static BuiltinAttribute> { |
| BUILTIN_ATTRIBUTES.iter().filter(|(.., gate)| gate.is_deprecated()).collect() |
| } |
| |
| pub fn is_builtin_attr_name(name: Symbol) -> bool { |
| BUILTIN_ATTRIBUTE_MAP.get(&name).is_some() |
| } |
| |
| lazy_static! { |
| pub static ref BUILTIN_ATTRIBUTE_MAP: FxHashMap<Symbol, &'static BuiltinAttribute> = { |
| let mut map = FxHashMap::default(); |
| for attr in BUILTIN_ATTRIBUTES.iter() { |
| if map.insert(attr.0, attr).is_some() { |
| panic!("duplicate builtin attribute `{}`", attr.0); |
| } |
| } |
| map |
| }; |
| } |
