From 253678ead2a7a977340ab182685c4b932b855b3b Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Fri, 11 Dec 2020 14:04:33 +0100
Subject: Add builtin attributes for use in nameres
---
crates/hir_def/src/builtin_attr.rs | 428 +++++++++++++++++++++++++++++++++++++
crates/hir_def/src/lib.rs | 1 +
2 files changed, 429 insertions(+)
create mode 100644 crates/hir_def/src/builtin_attr.rs
(limited to 'crates/hir_def')
diff --git a/crates/hir_def/src/builtin_attr.rs b/crates/hir_def/src/builtin_attr.rs
new file mode 100644
index 000000000..a02bf01cd
--- /dev/null
+++ b/crates/hir_def/src/builtin_attr.rs
@@ -0,0 +1,428 @@
+//! Builtin attributes resolved by nameres.
+//!
+//! The actual definitions were copied from rustc's `compiler/rustc_feature/src/builtin_attrs.rs`.
+//!
+//! The macros were adjusted to only expand to the attribute name, since that is all we need to do
+//! name resolution, and `BUILTIN_ATTRIBUTES` is almost entirely unchanged from the original, to
+//! ease updating.
+
+/// Ignored attribute namespaces used by tools.
+pub const TOOL_MODULES: &[&str] = &["rustfmt", "clippy"];
+
+type BuiltinAttribute = &'static str;
+
+macro_rules! ungated {
+ ($attr:ident, $typ:expr, $tpl:expr $(,)?) => {
+ stringify!($attr)
+ };
+}
+
+macro_rules! gated {
+ ($attr:ident $($rest:tt)*) => {
+ stringify!($attr)
+ };
+}
+
+macro_rules! rustc_attr {
+ (TEST, $attr:ident $($rest:tt)*) => {
+ stringify!($attr)
+ };
+ ($attr:ident $($rest:tt)*) => {
+ stringify!($attr)
+ };
+}
+
+/// Attributes that have a special meaning to rustc or rustdoc.
+#[rustfmt::skip]
+pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
+ // ==========================================================================
+ // Stable attributes:
+ // ==========================================================================
+
+ // Conditional 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, AssumedUsed, 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, AssumedUsed,
+ template!(List: r#"name = "...", /*opt*/ kind = "dylib|static|...", /*opt*/ wasm_import_module = "...""#),
+ ),
+ ungated!(link_name, AssumedUsed, template!(NameValueStr: "name")),
+ ungated!(no_link, Normal, template!(Word)),
+ ungated!(repr, Normal, template!(List: "C")),
+ ungated!(export_name, AssumedUsed, template!(NameValueStr: "name")),
+ ungated!(link_section, AssumedUsed, template!(NameValueStr: "name")),
+ ungated!(no_mangle, AssumedUsed, template!(Word)),
+ ungated!(used, AssumedUsed, template!(Word)),
+
+ // Limits:
+ ungated!(recursion_limit, CrateLevel, template!(NameValueStr: "N")),
+ ungated!(type_length_limit, CrateLevel, template!(NameValueStr: "N")),
+ gated!(
+ const_eval_limit, CrateLevel, template!(NameValueStr: "N"), const_eval_limit,
+ experimental!(const_eval_limit)
+ ),
+
+ // 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, AssumedUsed, template!(Word)),
+
+ // Runtime
+ ungated!(windows_subsystem, AssumedUsed, template!(NameValueStr: "windows|console")),
+ ungated!(panic_handler, Normal, template!(Word)), // RFC 2070
+
+ // Code generation:
+ ungated!(inline, AssumedUsed, template!(Word, List: "always|never")),
+ ungated!(cold, AssumedUsed, template!(Word)),
+ ungated!(no_builtins, AssumedUsed, template!(Word)),
+ ungated!(target_feature, AssumedUsed, template!(List: r#"enable = "name""#)),
+ ungated!(track_caller, AssumedUsed, template!(Word)),
+ gated!(
+ no_sanitize, AssumedUsed,
+ template!(List: "address, memory, thread"),
+ experimental!(no_sanitize)
+ ),
+
+ // FIXME: #14408 assume docs are used since rustdoc looks at them.
+ ungated!(doc, AssumedUsed, template!(List: "hidden|inline|...", NameValueStr: "string")),
+
+ // ==========================================================================
+ // Unstable attributes:
+ // ==========================================================================
+
+ // Linking:
+ gated!(naked, AssumedUsed, 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, AssumedUsed, template!(List: "ordinal"), raw_dylib,
+ experimental!(link_ordinal)
+ ),
+
+ // Plugins:
+ // XXX Modified for use in rust-analyzer
+ gated!(plugin_registrar),
+ gated!(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, AssumedUsed, 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, AssumedUsed, template!(List: "size|speed"), optimize_attribute,
+ experimental!(optimize),
+ ),
+ // RFC 2867
+ gated!(instruction_set, AssumedUsed, template!(List: "set"), isa_attribute, experimental!(instruction_set)),
+
+ gated!(ffi_returns_twice, AssumedUsed, template!(Word), experimental!(ffi_returns_twice)),
+ gated!(ffi_pure, AssumedUsed, template!(Word), experimental!(ffi_pure)),
+ gated!(ffi_const, AssumedUsed, template!(Word), experimental!(ffi_const)),
+ gated!(
+ register_attr, CrateLevel, template!(List: "attr1, attr2, ..."),
+ experimental!(register_attr),
+ ),
+ gated!(
+ register_tool, CrateLevel, template!(List: "tool1, tool2, ..."),
+ experimental!(register_tool),
+ ),
+
+ gated!(cmse_nonsecure_entry, AssumedUsed, template!(Word), experimental!(cmse_nonsecure_entry)),
+
+ // ==========================================================================
+ // 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, AssumedUsed,
+ template!(List: r#"since = "version", reason = "...""#)
+ ),
+ // FIXME(#14407)
+ ungated!(stable, AssumedUsed, template!(List: r#"feature = "name", since = "version""#)),
+ // FIXME(#14407)
+ ungated!(
+ unstable, AssumedUsed,
+ template!(List: r#"feature = "name", reason = "...", issue = "N""#),
+ ),
+ // FIXME(#14407)
+ ungated!(rustc_const_unstable, AssumedUsed, template!(List: r#"feature = "name""#)),
+ // FIXME(#14407)
+ ungated!(rustc_const_stable, AssumedUsed, template!(List: r#"feature = "name""#)),
+ gated!(
+ allow_internal_unstable, AssumedUsed, template!(Word, List: "feat1, feat2, ..."),
+ "allow_internal_unstable side-steps feature gating and stability checks",
+ ),
+ gated!(
+ rustc_allow_const_fn_unstable, AssumedUsed, template!(Word, List: "feat1, feat2, ..."),
+ "rustc_allow_const_fn_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, AssumedUsed, template!(Word), experimental!(fundamental)),
+ 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, AssumedUsed, template!(Word), IMPL_DETAIL),
+ rustc_attr!(rustc_allocator_nounwind, AssumedUsed, template!(Word), IMPL_DETAIL),
+ gated!(alloc_error_handler, Normal, template!(Word), experimental!(alloc_error_handler)),
+ gated!(
+ default_lib_allocator, AssumedUsed, template!(Word), allocator_internals,
+ experimental!(default_lib_allocator),
+ ),
+ gated!(
+ needs_allocator, Normal, template!(Word), allocator_internals,
+ experimental!(needs_allocator),
+ ),
+ gated!(panic_runtime, AssumedUsed, template!(Word), experimental!(panic_runtime)),
+ gated!(needs_panic_runtime, AssumedUsed, template!(Word), experimental!(needs_panic_runtime)),
+ gated!(
+ unwind, AssumedUsed, template!(List: "allowed|aborts"), unwind_attributes,
+ experimental!(unwind),
+ ),
+ gated!(
+ compiler_builtins, AssumedUsed, 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!(
+ profiler_runtime, AssumedUsed, 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, AssumedUsed, template!(NameValueStr: "external|internal|..."),
+ "the `linkage` attribute is experimental and not portable across platforms",
+ ),
+ rustc_attr!(rustc_std_internal_symbol, AssumedUsed, template!(Word), INTERNAL_UNSTABLE),
+
+ // ==========================================================================
+ // Internal attributes, Macro related:
+ // ==========================================================================
+
+ rustc_attr!(rustc_builtin_macro, AssumedUsed, template!(Word), IMPL_DETAIL),
+ rustc_attr!(rustc_proc_macro_decls, Normal, template!(Word), INTERNAL_UNSTABLE),
+ rustc_attr!(
+ rustc_macro_transparency, AssumedUsed,
+ template!(NameValueStr: "transparent|semitransparent|opaque"),
+ "used internally for testing macro hygiene",
+ ),
+
+ // ==========================================================================
+ // Internal attributes, Diagnostics related:
+ // ==========================================================================
+
+ rustc_attr!(
+ rustc_on_unimplemented, AssumedUsed,
+ template!(
+ List: r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#,
+ NameValueStr: "message"
+ ),
+ INTERNAL_UNSTABLE
+ ),
+ // Enumerates "identity-like" conversion methods to suggest on type mismatch.
+ rustc_attr!(rustc_conversion_suggestion, AssumedUsed, template!(Word), INTERNAL_UNSTABLE),
+
+ // ==========================================================================
+ // Internal attributes, Const related:
+ // ==========================================================================
+
+ rustc_attr!(rustc_promotable, AssumedUsed, template!(Word), IMPL_DETAIL),
+ rustc_attr!(rustc_args_required_const, AssumedUsed, template!(List: "N"), INTERNAL_UNSTABLE),
+
+ // ==========================================================================
+ // Internal attributes, Layout related:
+ // ==========================================================================
+
+ rustc_attr!(
+ rustc_layout_scalar_valid_range_start, AssumedUsed, 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, AssumedUsed, 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, AssumedUsed, 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",
+ ),
+ gated!(rustc_diagnostic_item), // XXX modified in rust-analyzer
+ gated!(
+ // Used in resolve:
+ prelude_import, AssumedUsed, 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, AssumedUsed, 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",
+ ),
+ rustc_attr!(
+ rustc_unsafe_specialization_marker, Normal, template!(Word),
+ "the `#[rustc_unsafe_specialization_marker]` attribute is used to check specializations"
+ ),
+ rustc_attr!(
+ rustc_specialization_trait, Normal, template!(Word),
+ "the `#[rustc_specialization_trait]` attribute is used to check specializations"
+ ),
+
+ // ==========================================================================
+ // Internal attributes, Testing:
+ // ==========================================================================
+
+ rustc_attr!(TEST, rustc_outlives, Normal, template!(Word)),
+ rustc_attr!(TEST, rustc_capture_analysis, 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, AssumedUsed,
+ template!(Word, List: "delay_span_bug_from_inside_query")
+ ),
+ rustc_attr!(TEST, rustc_dump_user_substs, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_if_this_changed, AssumedUsed, template!(Word, List: "DepNode")),
+ rustc_attr!(TEST, rustc_then_this_would_need, AssumedUsed, template!(List: "DepNode")),
+ rustc_attr!(
+ TEST, rustc_dirty, AssumedUsed,
+ template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#),
+ ),
+ rustc_attr!(
+ TEST, rustc_clean, AssumedUsed,
+ template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#),
+ ),
+ rustc_attr!(
+ TEST, rustc_partition_reused, AssumedUsed,
+ template!(List: r#"cfg = "...", module = "...""#),
+ ),
+ rustc_attr!(
+ TEST, rustc_partition_codegened, AssumedUsed,
+ template!(List: r#"cfg = "...", module = "...""#),
+ ),
+ rustc_attr!(
+ TEST, rustc_expected_cgu_reuse, AssumedUsed,
+ template!(List: r#"cfg = "...", module = "...", kind = "...""#),
+ ),
+ rustc_attr!(TEST, rustc_synthetic, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_symbol_name, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_polymorphize_error, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_def_path, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_mir, AssumedUsed, template!(List: "arg1, arg2, ...")),
+ rustc_attr!(TEST, rustc_dump_program_clauses, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_dump_env_program_clauses, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_object_lifetime_default, AssumedUsed, template!(Word)),
+ rustc_attr!(TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/)),
+ gated!(
+ omit_gdb_pretty_printer_section, AssumedUsed, template!(Word),
+ "the `#[omit_gdb_pretty_printer_section]` attribute is just used for the Rust test suite",
+ ),
+];
diff --git a/crates/hir_def/src/lib.rs b/crates/hir_def/src/lib.rs
index 02ed30e4d..a75d4d302 100644
--- a/crates/hir_def/src/lib.rs
+++ b/crates/hir_def/src/lib.rs
@@ -18,6 +18,7 @@ pub mod attr;
pub mod path;
pub mod type_ref;
pub mod builtin_type;
+pub mod builtin_attr;
pub mod diagnostics;
pub mod per_ns;
pub mod item_scope;
--
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