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Change only_local to enum type and change the macros to always require a variant of that enum.

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This commit is contained in:
surechen
2024-03-19 00:05:18 +08:00
parent 3cdcdaf31b
commit db48dfcd03
4 changed files with 279 additions and 215 deletions
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compiler/rustc_feature/src/builtin_attrs.rs
+274 -204
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@@ -150,16 +150,6 @@ pub enum AttributeDuplicates {
FutureWarnPreceding,
}
/// A convenience macro to deal with `$($expr)?`.
macro_rules! or_default {
($default:expr,) => {
$default
};
($default:expr, $next:expr) => {
$next
};
}
/// A convenience macro for constructing attribute templates.
/// E.g., `template!(Word, List: "description")` means that the attribute
/// supports forms `#[attr]` and `#[attr(description)]`.
@@ -181,10 +171,10 @@ macro_rules! template {
}
macro_rules! ungated {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr $(, @only_local: $only_local:expr)? $(,)?) => {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
only_local: or_default!(false, $($only_local)?),
encode_cross_crate: $encode_cross_crate,
type_: $typ,
template: $tpl,
gate: Ungated,
@@ -194,20 +184,20 @@ macro_rules! ungated {
}
macro_rules! gated {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr $(, @only_local: $only_local:expr)?, $gate:ident, $msg:expr $(,)?) => {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $msg:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
only_local: or_default!(false, $($only_local)?),
encode_cross_crate: $encode_cross_crate,
type_: $typ,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)),
}
};
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr $(, @only_local: $only_local:expr)?, $msg:expr $(,)?) => {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
only_local: or_default!(false, $($only_local)?),
encode_cross_crate: $encode_cross_crate,
type_: $typ,
template: $tpl,
duplicates: $duplicates,
@@ -217,13 +207,13 @@ macro_rules! gated {
}
macro_rules! rustc_attr {
(TEST, $attr:ident, $typ:expr, $tpl:expr, $duplicate:expr $(, @only_local: $only_local:expr)? $(,)?) => {
(TEST, $attr:ident, $typ:expr, $tpl:expr, $duplicate:expr, $encode_cross_crate:expr $(,)?) => {
rustc_attr!(
$attr,
$typ,
$tpl,
$duplicate,
$(@only_local: $only_local,)?
$encode_cross_crate,
concat!(
"the `#[",
stringify!($attr),
@@ -232,10 +222,10 @@ macro_rules! rustc_attr {
),
)
};
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr $(, @only_local: $only_local:expr)?, $msg:expr $(,)?) => {
($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
only_local: or_default!(false, $($only_local)?),
encode_cross_crate: $encode_cross_crate,
type_: $typ,
template: $tpl,
duplicates: $duplicates,
@@ -253,12 +243,19 @@ macro_rules! experimental {
const IMPL_DETAIL: &str = "internal implementation detail";
const INTERNAL_UNSTABLE: &str = "this is an internal attribute that will never be stable";
#[derive(PartialEq)]
pub enum EncodeCrossCrate {
Yes,
No,
}
pub struct BuiltinAttribute {
pub name: Symbol,
/// Whether this attribute is only used in the local crate.
/// Whether this attribute is encode cross crate.
///
/// If so, it is not encoded in the crate metadata.
pub only_local: bool,
/// If so, it is encoded in the crate metadata.
/// Otherwise, it can only be used in the local crate.
pub encode_cross_crate: EncodeCrossCrate,
pub type_: AttributeType,
pub template: AttributeTemplate,
pub duplicates: AttributeDuplicates,
@@ -273,65 +270,71 @@ pub struct BuiltinAttribute {
// ==========================================================================
// Conditional compilation:
ungated!(cfg, Normal, template!(List: "predicate"), DuplicatesOk),
ungated!(cfg_attr, Normal, template!(List: "predicate, attr1, attr2, ..."), DuplicatesOk),
ungated!(cfg, Normal, template!(List: "predicate"), DuplicatesOk, EncodeCrossCrate::Yes),
ungated!(cfg_attr, Normal, template!(List: "predicate, attr1, attr2, ..."), DuplicatesOk, EncodeCrossCrate::Yes),
// Testing:
ungated!(
ignore, Normal, template!(Word, NameValueStr: "reason"), WarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
),
ungated!(
should_panic, Normal,
template!(Word, List: r#"expected = "reason""#, NameValueStr: "reason"), FutureWarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
),
// FIXME(Centril): This can be used on stable but shouldn't.
ungated!(
reexport_test_harness_main, CrateLevel, template!(NameValueStr: "name"), ErrorFollowing,
@only_local: true,
EncodeCrossCrate::No,
),
// Macros:
ungated!(automatically_derived, Normal, template!(Word), WarnFollowing),
ungated!(automatically_derived, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes),
ungated!(
macro_use, Normal, template!(Word, List: "name1, name2, ..."), WarnFollowingWordOnly,
@only_local: true,
EncodeCrossCrate::No,
),
ungated!(macro_escape, Normal, template!(Word), WarnFollowing, @only_local: true), // Deprecated synonym for `macro_use`.
ungated!(macro_export, Normal, template!(Word, List: "local_inner_macros"), WarnFollowing),
ungated!(proc_macro, Normal, template!(Word), ErrorFollowing, @only_local: true),
ungated!(macro_escape, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No), // Deprecated synonym for `macro_use`.
ungated!(
macro_export, Normal, template!(Word, List: "local_inner_macros"),
WarnFollowing, EncodeCrossCrate::Yes
),
ungated!(proc_macro, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::No),
ungated!(
proc_macro_derive, Normal, template!(List: "TraitName, /*opt*/ attributes(name1, name2, ...)"),
ErrorFollowing, @only_local: true,
ErrorFollowing, EncodeCrossCrate::No,
),
ungated!(proc_macro_attribute, Normal, template!(Word), ErrorFollowing, @only_local: true),
ungated!(proc_macro_attribute, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::No),
// Lints:
ungated!(
warn, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#),
DuplicatesOk, @only_local: true,
DuplicatesOk, EncodeCrossCrate::No,
),
ungated!(
allow, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#),
DuplicatesOk, @only_local: true,
DuplicatesOk, EncodeCrossCrate::No,
),
gated!(
expect, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#), DuplicatesOk,
@only_local: true, lint_reasons, experimental!(expect)
EncodeCrossCrate::No, lint_reasons, experimental!(expect)
),
ungated!(
forbid, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#),
DuplicatesOk, @only_local: true,
DuplicatesOk, EncodeCrossCrate::No
),
ungated!(
deny, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#),
DuplicatesOk, @only_local: true,
DuplicatesOk, EncodeCrossCrate::No
),
ungated!(
must_use, Normal, template!(Word, NameValueStr: "reason"),
FutureWarnFollowing, EncodeCrossCrate::Yes
),
ungated!(must_use, Normal, template!(Word, NameValueStr: "reason"), FutureWarnFollowing),
gated!(
must_not_suspend, Normal, template!(Word, NameValueStr: "reason"), WarnFollowing,
experimental!(must_not_suspend)
EncodeCrossCrate::Yes, experimental!(must_not_suspend)
),
ungated!(
deprecated, Normal,
@@ -340,22 +343,22 @@ pub struct BuiltinAttribute {
List: r#"/*opt*/ since = "version", /*opt*/ note = "reason""#,
NameValueStr: "reason"
),
ErrorFollowing
ErrorFollowing, EncodeCrossCrate::Yes
),
// Crate properties:
ungated!(
crate_name, CrateLevel, template!(NameValueStr: "name"), FutureWarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
),
ungated!(
crate_type, CrateLevel, template!(NameValueStr: "bin|lib|..."), DuplicatesOk,
@only_local: true,
EncodeCrossCrate::No,
),
// crate_id is deprecated
ungated!(
crate_id, CrateLevel, template!(NameValueStr: "ignored"), FutureWarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
),
// ABI, linking, symbols, and FFI
@@ -363,81 +366,88 @@ pub struct BuiltinAttribute {
link, Normal,
template!(List: r#"name = "...", /*opt*/ kind = "dylib|static|...", /*opt*/ wasm_import_module = "...", /*opt*/ import_name_type = "decorated|noprefix|undecorated""#),
DuplicatesOk,
@only_local: true,
EncodeCrossCrate::No,
),
ungated!(link_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding),
ungated!(no_link, Normal, template!(Word), WarnFollowing, @only_local: true),
ungated!(repr, Normal, template!(List: "C"), DuplicatesOk, @only_local: true),
ungated!(export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, @only_local: true),
ungated!(link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, @only_local: true),
ungated!(no_mangle, Normal, template!(Word), WarnFollowing, @only_local: true),
ungated!(used, Normal, template!(Word, List: "compiler|linker"), WarnFollowing, @only_local: true),
ungated!(link_ordinal, Normal, template!(List: "ordinal"), ErrorPreceding),
ungated!(
link_name, Normal, template!(NameValueStr: "name"),
FutureWarnPreceding, EncodeCrossCrate::Yes
),
ungated!(no_link, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(repr, Normal, template!(List: "C"), DuplicatesOk, EncodeCrossCrate::No),
ungated!(export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(no_mangle, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(used, Normal, template!(Word, List: "compiler|linker"), WarnFollowing, EncodeCrossCrate::No),
ungated!(link_ordinal, Normal, template!(List: "ordinal"), ErrorPreceding, EncodeCrossCrate::Yes),
// Limits:
ungated!(
recursion_limit, CrateLevel, template!(NameValueStr: "N"), FutureWarnFollowing,
@only_local: true
EncodeCrossCrate::No
),
ungated!(
type_length_limit, CrateLevel, template!(NameValueStr: "N"), FutureWarnFollowing,
@only_local: true
EncodeCrossCrate::No
),
gated!(
move_size_limit, CrateLevel, template!(NameValueStr: "N"), ErrorFollowing,
@only_local: true, large_assignments, experimental!(move_size_limit)
EncodeCrossCrate::No, large_assignments, experimental!(move_size_limit)
),
// Entry point:
gated!(unix_sigpipe, Normal, template!(NameValueStr: "inherit|sig_ign|sig_dfl"), ErrorFollowing, experimental!(unix_sigpipe)),
ungated!(start, Normal, template!(Word), WarnFollowing, @only_local: true),
ungated!(no_start, CrateLevel, template!(Word), WarnFollowing, @only_local: true),
ungated!(no_main, CrateLevel, template!(Word), WarnFollowing, @only_local: true),
gated!(
unix_sigpipe, Normal, template!(NameValueStr: "inherit|sig_ign|sig_dfl"), ErrorFollowing,
EncodeCrossCrate::Yes, experimental!(unix_sigpipe)
),
ungated!(start, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(no_start, CrateLevel, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(no_main, CrateLevel, template!(Word), WarnFollowing, EncodeCrossCrate::No),
// Modules, prelude, and resolution:
ungated!(path, Normal, template!(NameValueStr: "file"), FutureWarnFollowing, @only_local: true),
ungated!(no_std, CrateLevel, template!(Word), WarnFollowing, @only_local: true),
ungated!(no_implicit_prelude, Normal, template!(Word), WarnFollowing, @only_local: true),
ungated!(non_exhaustive, Normal, template!(Word), WarnFollowing),
ungated!(path, Normal, template!(NameValueStr: "file"), FutureWarnFollowing, EncodeCrossCrate::No),
ungated!(no_std, CrateLevel, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(no_implicit_prelude, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(non_exhaustive, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes),
// Runtime
ungated!(
windows_subsystem, CrateLevel,
template!(NameValueStr: "windows|console"), FutureWarnFollowing,
@only_local: true
EncodeCrossCrate::No
),
ungated!(panic_handler, Normal, template!(Word), WarnFollowing), // RFC 2070
ungated!(panic_handler, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes), // RFC 2070
// Code generation:
ungated!(inline, Normal, template!(Word, List: "always|never"), FutureWarnFollowing, @only_local: true),
ungated!(cold, Normal, template!(Word), WarnFollowing, @only_local: true),
ungated!(no_builtins, CrateLevel, template!(Word), WarnFollowing),
ungated!(inline, Normal, template!(Word, List: "always|never"), FutureWarnFollowing, EncodeCrossCrate::No),
ungated!(cold, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(no_builtins, CrateLevel, template!(Word), WarnFollowing, EncodeCrossCrate::Yes),
ungated!(
target_feature, Normal, template!(List: r#"enable = "name""#),
DuplicatesOk, @only_local: true,
DuplicatesOk, EncodeCrossCrate::No,
),
ungated!(track_caller, Normal, template!(Word), WarnFollowing),
ungated!(instruction_set, Normal, template!(List: "set"), ErrorPreceding, @only_local: true),
ungated!(track_caller, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes),
ungated!(instruction_set, Normal, template!(List: "set"), ErrorPreceding, EncodeCrossCrate::No),
gated!(
no_sanitize, Normal,
template!(List: "address, kcfi, memory, thread"), DuplicatesOk,
@only_local: true, experimental!(no_sanitize)
EncodeCrossCrate::No, experimental!(no_sanitize)
),
gated!(
coverage, Normal, template!(Word, List: "on|off"),
WarnFollowing, @only_local: true,
WarnFollowing, EncodeCrossCrate::No,
coverage_attribute, experimental!(coverage)
),
ungated!(
doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string"), DuplicatesOk
doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string"), DuplicatesOk,
EncodeCrossCrate::Yes
),
// Debugging
ungated!(
debugger_visualizer, Normal,
template!(List: r#"natvis_file = "...", gdb_script_file = "...""#),
DuplicatesOk, @only_local: true
DuplicatesOk, EncodeCrossCrate::No
),
// ==========================================================================
@@ -446,54 +456,55 @@ pub struct BuiltinAttribute {
// Linking:
gated!(
naked, Normal, template!(Word), WarnFollowing, @only_local: true,
naked, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
naked_functions, experimental!(naked)
),
// Testing:
gated!(
test_runner, CrateLevel, template!(List: "path"), ErrorFollowing, custom_test_frameworks,
test_runner, CrateLevel, template!(List: "path"), ErrorFollowing,
EncodeCrossCrate::Yes, custom_test_frameworks,
"custom test frameworks are an unstable feature",
),
// RFC #1268
gated!(
marker, Normal, template!(Word), WarnFollowing, @only_local: true,
marker, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
marker_trait_attr, experimental!(marker)
),
gated!(
thread_local, Normal, template!(Word), WarnFollowing, @only_local: true,
thread_local, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
"`#[thread_local]` is an experimental feature, and does not currently handle destructors",
),
gated!(
no_core, CrateLevel, template!(Word), WarnFollowing,
@only_local: true, experimental!(no_core)
EncodeCrossCrate::No, experimental!(no_core)
),
// RFC 2412
gated!(
optimize, Normal, template!(List: "size|speed"), ErrorPreceding,
@only_local: true, optimize_attribute, experimental!(optimize)
EncodeCrossCrate::No, optimize_attribute, experimental!(optimize)
),
gated!(
ffi_pure, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(ffi_pure)
EncodeCrossCrate::No, experimental!(ffi_pure)
),
gated!(
ffi_const, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(ffi_const)
EncodeCrossCrate::No, experimental!(ffi_const)
),
gated!(
register_tool, CrateLevel, template!(List: "tool1, tool2, ..."), DuplicatesOk,
@only_local: true, experimental!(register_tool),
EncodeCrossCrate::No, experimental!(register_tool),
),
gated!(
cmse_nonsecure_entry, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(cmse_nonsecure_entry)
EncodeCrossCrate::No, experimental!(cmse_nonsecure_entry)
),
// RFC 2632
gated!(
const_trait, Normal, template!(Word), WarnFollowing, const_trait_impl,
const_trait, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes, const_trait_impl,
"`const_trait` is a temporary placeholder for marking a trait that is suitable for `const` \
`impls` and all default bodies as `const`, which may be removed or renamed in the \
future."
@@ -501,25 +512,25 @@ pub struct BuiltinAttribute {
// lang-team MCP 147
gated!(
deprecated_safe, Normal, template!(List: r#"since = "version", note = "...""#), ErrorFollowing,
experimental!(deprecated_safe),
EncodeCrossCrate::Yes, experimental!(deprecated_safe),
),
// `#[collapse_debuginfo]`
gated!(
collapse_debuginfo, Normal, template!(Word, List: "no|external|yes"), ErrorFollowing,
@only_local: true, experimental!(collapse_debuginfo)
EncodeCrossCrate::No, experimental!(collapse_debuginfo)
),
// RFC 2397
gated!(
do_not_recommend, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(do_not_recommend)
EncodeCrossCrate::No, experimental!(do_not_recommend)
),
// `#[cfi_encoding = ""]`
gated!(
cfi_encoding, Normal, template!(NameValueStr: "encoding"), ErrorPreceding,
experimental!(cfi_encoding)
EncodeCrossCrate::Yes, experimental!(cfi_encoding)
),
// ==========================================================================
@@ -528,43 +539,48 @@ pub struct BuiltinAttribute {
ungated!(
feature, CrateLevel,
template!(List: "name1, name2, ..."), DuplicatesOk, @only_local: true,
template!(List: "name1, name2, ..."), DuplicatesOk, EncodeCrossCrate::No,
),
// DuplicatesOk since it has its own validation
ungated!(
stable, Normal,
template!(List: r#"feature = "name", since = "version""#), DuplicatesOk, @only_local: true,
template!(List: r#"feature = "name", since = "version""#), DuplicatesOk, EncodeCrossCrate::No,
),
ungated!(
unstable, Normal,
template!(List: r#"feature = "name", reason = "...", issue = "N""#), DuplicatesOk,
EncodeCrossCrate::Yes
),
ungated!(
rustc_const_unstable, Normal, template!(List: r#"feature = "name""#),
DuplicatesOk, EncodeCrossCrate::Yes
),
ungated!(rustc_const_unstable, Normal, template!(List: r#"feature = "name""#), DuplicatesOk),
ungated!(
rustc_const_stable, Normal,
template!(List: r#"feature = "name""#), DuplicatesOk, @only_local: true,
template!(List: r#"feature = "name""#), DuplicatesOk, EncodeCrossCrate::No,
),
ungated!(
rustc_default_body_unstable, Normal,
template!(List: r#"feature = "name", reason = "...", issue = "N""#),
DuplicatesOk, @only_local: true
DuplicatesOk, EncodeCrossCrate::No
),
gated!(
allow_internal_unstable, Normal, template!(Word, List: "feat1, feat2, ..."), DuplicatesOk,
allow_internal_unstable, Normal, template!(Word, List: "feat1, feat2, ..."),
DuplicatesOk, EncodeCrossCrate::Yes,
"allow_internal_unstable side-steps feature gating and stability checks",
),
gated!(
rustc_allow_const_fn_unstable, Normal,
template!(Word, List: "feat1, feat2, ..."), DuplicatesOk, @only_local: true,
template!(Word, List: "feat1, feat2, ..."), DuplicatesOk, EncodeCrossCrate::No,
"rustc_allow_const_fn_unstable side-steps feature gating and stability checks"
),
gated!(
allow_internal_unsafe, Normal, template!(Word), WarnFollowing,
@only_local: true, "allow_internal_unsafe side-steps the unsafe_code lint",
EncodeCrossCrate::No, "allow_internal_unsafe side-steps the unsafe_code lint",
),
rustc_attr!(
rustc_allowed_through_unstable_modules, Normal, template!(Word),
WarnFollowing, @only_local: true,
WarnFollowing, EncodeCrossCrate::No,
"rustc_allowed_through_unstable_modules special cases accidental stabilizations of stable items \
through unstable paths"
),
@@ -573,16 +589,16 @@ pub struct BuiltinAttribute {
// Internal attributes: Type system related:
// ==========================================================================
gated!(fundamental, Normal, template!(Word), WarnFollowing, experimental!(fundamental)),
gated!(fundamental, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes, experimental!(fundamental)),
gated!(
may_dangle, Normal, template!(Word), WarnFollowing,
@only_local: true, dropck_eyepatch,
EncodeCrossCrate::No, dropck_eyepatch,
"`may_dangle` has unstable semantics and may be removed in the future",
),
rustc_attr!(
rustc_never_type_mode, Normal, template!(NameValueStr: "fallback_to_unit|fallback_to_niko|fallback_to_never|no_fallback"), ErrorFollowing,
@only_local: true,
EncodeCrossCrate::No,
"`rustc_never_type_fallback` is used to experiment with never type fallback and work on \
never type stabilization, and will never be stable"
),
@@ -593,49 +609,49 @@ pub struct BuiltinAttribute {
rustc_attr!(
rustc_allocator, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL
EncodeCrossCrate::No, IMPL_DETAIL
),
rustc_attr!(
rustc_nounwind, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL
EncodeCrossCrate::No, IMPL_DETAIL
),
rustc_attr!(
rustc_reallocator, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL
EncodeCrossCrate::No, IMPL_DETAIL
),
rustc_attr!(
rustc_deallocator, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL
EncodeCrossCrate::No, IMPL_DETAIL
),
rustc_attr!(
rustc_allocator_zeroed, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL
EncodeCrossCrate::No, IMPL_DETAIL
),
gated!(
default_lib_allocator, Normal, template!(Word), WarnFollowing,
@only_local: true, allocator_internals, experimental!(default_lib_allocator),
EncodeCrossCrate::No, allocator_internals, experimental!(default_lib_allocator),
),
gated!(
needs_allocator, Normal, template!(Word), WarnFollowing,
@only_local: true, allocator_internals, experimental!(needs_allocator),
EncodeCrossCrate::No, allocator_internals, experimental!(needs_allocator),
),
gated!(
panic_runtime, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(panic_runtime)
EncodeCrossCrate::No, experimental!(panic_runtime)
),
gated!(
needs_panic_runtime, Normal, template!(Word), WarnFollowing,
@only_local: true, experimental!(needs_panic_runtime)
EncodeCrossCrate::No, experimental!(needs_panic_runtime)
),
gated!(
compiler_builtins, Normal, template!(Word), WarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
"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, Normal, template!(Word), WarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
"the `#[profiler_runtime]` attribute is used to identify the `profiler_builtins` crate \
which contains the profiler runtime and will never be stable",
),
@@ -645,11 +661,13 @@ pub struct BuiltinAttribute {
// ==========================================================================
gated!(
linkage, Normal, template!(NameValueStr: "external|internal|..."), ErrorPreceding, @only_local: true,
linkage, Normal, template!(NameValueStr: "external|internal|..."),
ErrorPreceding, EncodeCrossCrate::No,
"the `linkage` attribute is experimental and not portable across platforms",
),
rustc_attr!(
rustc_std_internal_symbol, Normal, template!(Word), WarnFollowing, @only_local: true, INTERNAL_UNSTABLE
rustc_std_internal_symbol, Normal, template!(Word), WarnFollowing,
EncodeCrossCrate::No, INTERNAL_UNSTABLE
),
// ==========================================================================
@@ -659,16 +677,16 @@ pub struct BuiltinAttribute {
rustc_attr!(
rustc_builtin_macro, Normal,
template!(Word, List: "name, /*opt*/ attributes(name1, name2, ...)"), ErrorFollowing,
IMPL_DETAIL,
EncodeCrossCrate::Yes, IMPL_DETAIL
),
rustc_attr!(
rustc_proc_macro_decls, Normal, template!(Word), WarnFollowing,
@only_local: true, INTERNAL_UNSTABLE
EncodeCrossCrate::No, INTERNAL_UNSTABLE
),
rustc_attr!(
rustc_macro_transparency, Normal,
template!(NameValueStr: "transparent|semitransparent|opaque"), ErrorFollowing,
"used internally for testing macro hygiene",
EncodeCrossCrate::Yes, "used internally for testing macro hygiene",
),
// ==========================================================================
@@ -681,36 +699,50 @@ pub struct BuiltinAttribute {
List: r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#,
NameValueStr: "message"
),
ErrorFollowing,
ErrorFollowing, EncodeCrossCrate::Yes,
INTERNAL_UNSTABLE
),
rustc_attr!(
rustc_confusables, Normal,
template!(List: r#""name1", "name2", ..."#),
ErrorFollowing,
ErrorFollowing, EncodeCrossCrate::Yes,
INTERNAL_UNSTABLE,
),
// Enumerates "identity-like" conversion methods to suggest on type mismatch.
rustc_attr!(
rustc_conversion_suggestion, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE
rustc_conversion_suggestion, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Prevents field reads in the marked trait or method to be considered
// during dead code analysis.
rustc_attr!(
rustc_trivial_field_reads, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE
rustc_trivial_field_reads, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Used by the `rustc::potential_query_instability` lint to warn methods which
// might not be stable during incremental compilation.
rustc_attr!(rustc_lint_query_instability, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE),
rustc_attr!(
rustc_lint_query_instability, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Used by the `rustc::diagnostic_outside_of_impl` lints to assist in changes to diagnostic
// APIs. Any function with this attribute will be checked by that lint.
rustc_attr!(rustc_lint_diagnostics, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE),
rustc_attr!(
rustc_lint_diagnostics, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Used by the `rustc::bad_opt_access` lint to identify `DebuggingOptions` and `CodegenOptions`
// types (as well as any others in future).
rustc_attr!(rustc_lint_opt_ty, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE),
rustc_attr!(
rustc_lint_opt_ty, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Used by the `rustc::bad_opt_access` lint on fields
// types (as well as any others in future).
rustc_attr!(rustc_lint_opt_deny_field_access, Normal, template!(List: "message"), WarnFollowing, INTERNAL_UNSTABLE),
rustc_attr!(
rustc_lint_opt_deny_field_access, Normal, template!(List: "message"),
WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// ==========================================================================
// Internal attributes, Const related:
@@ -718,18 +750,20 @@ pub struct BuiltinAttribute {
rustc_attr!(
rustc_promotable, Normal, template!(Word), WarnFollowing,
@only_local: true, IMPL_DETAIL),
EncodeCrossCrate::No, IMPL_DETAIL),
rustc_attr!(
rustc_legacy_const_generics, Normal, template!(List: "N"), ErrorFollowing,
INTERNAL_UNSTABLE
EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Do not const-check this function's body. It will always get replaced during CTFE.
rustc_attr!(
rustc_do_not_const_check, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE
rustc_do_not_const_check, Normal, template!(Word), WarnFollowing,
EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// Ensure the argument to this function is &&str during const-check.
rustc_attr!(
rustc_const_panic_str, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE
rustc_const_panic_str, Normal, template!(Word), WarnFollowing,
EncodeCrossCrate::Yes, INTERNAL_UNSTABLE
),
// ==========================================================================
@@ -738,16 +772,19 @@ pub struct BuiltinAttribute {
rustc_attr!(
rustc_layout_scalar_valid_range_start, Normal, template!(List: "value"), ErrorFollowing,
EncodeCrossCrate::Yes,
"the `#[rustc_layout_scalar_valid_range_start]` attribute is just used to enable \
niche optimizations in libcore and libstd and will never be stable",
),
rustc_attr!(
rustc_layout_scalar_valid_range_end, Normal, template!(List: "value"), ErrorFollowing,
EncodeCrossCrate::Yes,
"the `#[rustc_layout_scalar_valid_range_end]` attribute is just used to enable \
niche optimizations in libcore and libstd and will never be stable",
),
rustc_attr!(
rustc_nonnull_optimization_guaranteed, Normal, template!(Word), WarnFollowing,
EncodeCrossCrate::Yes,
"the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to enable \
niche optimizations in libcore and libstd and will never be stable",
),
@@ -756,27 +793,29 @@ pub struct BuiltinAttribute {
// Internal attributes, Misc:
// ==========================================================================
gated!(
lang, Normal, template!(NameValueStr: "name"), DuplicatesOk, @only_local: true, lang_items,
lang, Normal, template!(NameValueStr: "name"), DuplicatesOk, EncodeCrossCrate::No, lang_items,
"language items are subject to change",
),
rustc_attr!(
rustc_pass_by_value, Normal, template!(Word), ErrorFollowing,
EncodeCrossCrate::Yes,
"#[rustc_pass_by_value] is used to mark types that must be passed by value instead of reference."
),
rustc_attr!(
rustc_never_returns_null_ptr, Normal, template!(Word), ErrorFollowing,
EncodeCrossCrate::Yes,
"#[rustc_never_returns_null_ptr] is used to mark functions returning non-null pointers."
),
rustc_attr!(
rustc_coherence_is_core, AttributeType::CrateLevel, template!(Word), ErrorFollowing, @only_local: true,
rustc_coherence_is_core, AttributeType::CrateLevel, template!(Word), ErrorFollowing, EncodeCrossCrate::No,
"#![rustc_coherence_is_core] allows inherent methods on builtin types, only intended to be used in `core`."
),
rustc_attr!(
rustc_coinductive, AttributeType::Normal, template!(Word), WarnFollowing, @only_local: true,
rustc_coinductive, AttributeType::Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
"#![rustc_coinductive] changes a trait to be coinductive, allowing cycles in the trait solver."
),
rustc_attr!(
rustc_allow_incoherent_impl, AttributeType::Normal, template!(Word), ErrorFollowing, @only_local: true,
rustc_allow_incoherent_impl, AttributeType::Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::No,
"#[rustc_allow_incoherent_impl] has to be added to all impl items of an incoherent inherent impl."
),
rustc_attr!(
@@ -784,16 +823,17 @@ pub struct BuiltinAttribute {
AttributeType::Normal,
template!(List: "implement_via_object = (true|false)"),
ErrorFollowing,
@only_local: true,
EncodeCrossCrate::No,
"#[rustc_deny_explicit_impl] enforces that a trait can have no user-provided impls"
),
rustc_attr!(
rustc_has_incoherent_inherent_impls, AttributeType::Normal, template!(Word), ErrorFollowing,
rustc_has_incoherent_inherent_impls, AttributeType::Normal, template!(Word),
ErrorFollowing, EncodeCrossCrate::Yes,
"#[rustc_has_incoherent_inherent_impls] allows the addition of incoherent inherent impls for \
the given type by annotating all impl items with #[rustc_allow_incoherent_impl]."
),
rustc_attr!(
rustc_box, AttributeType::Normal, template!(Word), ErrorFollowing, @only_local: true,
rustc_box, AttributeType::Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::No,
"#[rustc_box] allows creating boxes \
and it is only intended to be used in `alloc`."
),
@@ -801,7 +841,7 @@ pub struct BuiltinAttribute {
BuiltinAttribute {
name: sym::rustc_diagnostic_item,
// FIXME: This can be `true` once we always use `tcx.is_diagnostic_item`.
only_local: false,
encode_cross_crate: EncodeCrossCrate::Yes,
type_: Normal,
template: template!(NameValueStr: "name"),
duplicates: ErrorFollowing,
@@ -815,74 +855,74 @@ pub struct BuiltinAttribute {
gated!(
// Used in resolve:
prelude_import, Normal, template!(Word), WarnFollowing,
@only_local: true, "`#[prelude_import]` is for use by rustc only",
EncodeCrossCrate::No, "`#[prelude_import]` is for use by rustc only",
),
gated!(
rustc_paren_sugar, Normal, template!(Word), WarnFollowing, @only_local: true,
rustc_paren_sugar, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
unboxed_closures, "unboxed_closures are still evolving",
),
rustc_attr!(
rustc_inherit_overflow_checks, Normal, template!(Word), WarnFollowing, @only_local: true,
rustc_inherit_overflow_checks, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
"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"), ErrorFollowing,
template!(NameValueStr: "reservation message"), ErrorFollowing, EncodeCrossCrate::Yes,
"the `#[rustc_reservation_impl]` attribute is internally used \
for reserving for `for<T> From<!> for T` impl"
),
rustc_attr!(
rustc_test_marker, Normal, template!(NameValueStr: "name"), WarnFollowing,
@only_local: true, "the `#[rustc_test_marker]` attribute is used internally to track tests",
EncodeCrossCrate::No, "the `#[rustc_test_marker]` attribute is used internally to track tests",
),
rustc_attr!(
rustc_unsafe_specialization_marker, Normal, template!(Word),
WarnFollowing, @only_local: true,
WarnFollowing, EncodeCrossCrate::No,
"the `#[rustc_unsafe_specialization_marker]` attribute is used to check specializations"
),
rustc_attr!(
rustc_specialization_trait, Normal, template!(Word),
WarnFollowing, @only_local: true,
WarnFollowing, EncodeCrossCrate::No,
"the `#[rustc_specialization_trait]` attribute is used to check specializations"
),
rustc_attr!(
rustc_main, Normal, template!(Word), WarnFollowing, @only_local: true,
rustc_main, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No,
"the `#[rustc_main]` attribute is used internally to specify test entry point function",
),
rustc_attr!(
rustc_skip_array_during_method_dispatch, Normal, template!(Word),
WarnFollowing, @only_local: true,
WarnFollowing, EncodeCrossCrate::No,
"the `#[rustc_skip_array_during_method_dispatch]` attribute is used to exclude a trait \
from method dispatch when the receiver is an array, for compatibility in editions < 2021."
),
rustc_attr!(
rustc_must_implement_one_of, Normal, template!(List: "function1, function2, ..."),
ErrorFollowing, @only_local: true,
ErrorFollowing, EncodeCrossCrate::No,
"the `#[rustc_must_implement_one_of]` attribute is used to change minimal complete \
definition of a trait, it's currently in experimental form and should be changed before \
being exposed outside of the std"
),
rustc_attr!(
rustc_doc_primitive, Normal, template!(NameValueStr: "primitive name"), ErrorFollowing,
r#"`rustc_doc_primitive` is a rustc internal attribute"#,
EncodeCrossCrate::Yes, r#"`rustc_doc_primitive` is a rustc internal attribute"#,
),
rustc_attr!(
rustc_safe_intrinsic, Normal, template!(Word), WarnFollowing,
@only_local: true,
EncodeCrossCrate::No,
"the `#[rustc_safe_intrinsic]` attribute is used internally to mark intrinsics as safe"
),
rustc_attr!(
rustc_intrinsic, Normal, template!(Word), ErrorFollowing,
rustc_intrinsic, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes,
"the `#[rustc_intrinsic]` attribute is used to declare intrinsics with function bodies",
),
rustc_attr!(
rustc_no_mir_inline, Normal, template!(Word), WarnFollowing,
rustc_no_mir_inline, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes,
"#[rustc_no_mir_inline] prevents the MIR inliner from inlining a function while not affecting codegen"
),
rustc_attr!(
rustc_intrinsic_must_be_overridden, Normal, template!(Word), ErrorFollowing,
rustc_intrinsic_must_be_overridden, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes,
"the `#[rustc_intrinsic_must_be_overridden]` attribute is used to declare intrinsics without real bodies",
),
@@ -890,109 +930,135 @@ pub struct BuiltinAttribute {
// Internal attributes, Testing:
// ==========================================================================
rustc_attr!(TEST, rustc_effective_visibility, Normal, template!(Word), WarnFollowing),
rustc_attr!(TEST, rustc_effective_visibility, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes),
rustc_attr!(
TEST, rustc_outlives, Normal, template!(Word),
WarnFollowing, @only_local: true
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_capture_analysis, Normal, template!(Word),
WarnFollowing, @only_local: true
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_insignificant_dtor, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_strict_coherence, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_variance, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(TEST, rustc_insignificant_dtor, Normal, template!(Word), WarnFollowing),
rustc_attr!(TEST, rustc_strict_coherence, Normal, template!(Word), WarnFollowing),
rustc_attr!(TEST, rustc_variance, Normal, template!(Word), WarnFollowing, @only_local: true),
rustc_attr!(
TEST, rustc_variance_of_opaques, Normal, template!(Word),
WarnFollowing, @only_local: true
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_hidden_type_of_opaques, Normal, template!(Word),
WarnFollowing, @only_local: true),
rustc_attr!(TEST, rustc_layout, Normal, template!(List: "field1, field2, ..."), WarnFollowing),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_layout, Normal, template!(List: "field1, field2, ..."),
WarnFollowing, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_abi, Normal, template!(List: "field1, field2, ..."),
WarnFollowing, @only_local: true
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_regions, Normal, template!(Word),
WarnFollowing, @only_local: true
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_error, Normal,
template!(Word, List: "delayed_bug_from_inside_query"), WarnFollowingWordOnly
template!(Word, List: "delayed_bug_from_inside_query"),
WarnFollowingWordOnly, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_dump_user_args, Normal, template!(Word), WarnFollowing,
@only_local: true
),
rustc_attr!(TEST, rustc_evaluate_where_clauses, Normal, template!(Word), WarnFollowing),
rustc_attr!(
TEST, rustc_if_this_changed, Normal, template!(Word, List: "DepNode"),
DuplicatesOk, @only_local: true
TEST, rustc_dump_user_args, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_then_this_would_need, Normal, template!(List: "DepNode"),
DuplicatesOk, @only_local: true
TEST, rustc_evaluate_where_clauses, Normal, template!(Word), WarnFollowing,
EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_if_this_changed, Normal, template!(Word, List: "DepNode"), DuplicatesOk,
EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_then_this_would_need, Normal, template!(List: "DepNode"), DuplicatesOk,
EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_clean, Normal,
template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#),
DuplicatesOk, @only_local: true
DuplicatesOk, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_partition_reused, Normal,
template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, @only_local: true
template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_partition_codegened, Normal,
template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, @only_local: true
template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_expected_cgu_reuse, Normal,
template!(List: r#"cfg = "...", module = "...", kind = "...""#), DuplicatesOk,
@only_local: true
EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_symbol_name, Normal, template!(Word), WarnFollowing,
@only_local: true
TEST, rustc_symbol_name, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(TEST, rustc_polymorphize_error, Normal, template!(Word), WarnFollowing),
rustc_attr!(
TEST, rustc_def_path, Normal, template!(Word), WarnFollowing,
@only_local: true
TEST, rustc_polymorphize_error, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_def_path, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_mir, Normal, template!(List: "arg1, arg2, ..."),
DuplicatesOk, EncodeCrossCrate::Yes
),
rustc_attr!(TEST, rustc_mir, Normal, template!(List: "arg1, arg2, ..."), DuplicatesOk),
gated!(
custom_mir, Normal, template!(List: r#"dialect = "...", phase = "...""#),
ErrorFollowing, @only_local: true,
ErrorFollowing, EncodeCrossCrate::No,
"the `#[custom_mir]` attribute is just used for the Rust test suite",
),
rustc_attr!(
TEST, rustc_dump_program_clauses, Normal, template!(Word), WarnFollowing,
@only_local: true
TEST, rustc_dump_program_clauses, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_dump_env_program_clauses, Normal, template!(Word), WarnFollowing,
@only_local: true
TEST, rustc_dump_env_program_clauses, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_object_lifetime_default, Normal, template!(Word), WarnFollowing,
@only_local: true
TEST, rustc_object_lifetime_default, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(TEST, rustc_dump_vtable, Normal, template!(Word), WarnFollowing),
rustc_attr!(
TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/), DuplicatesOk,
@only_local: true
TEST, rustc_dump_vtable, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::Yes
),
rustc_attr!(
TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/),
DuplicatesOk, EncodeCrossCrate::No
),
gated!(
omit_gdb_pretty_printer_section, Normal, template!(Word), WarnFollowing,
@only_local: true,
omit_gdb_pretty_printer_section, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No,
"the `#[omit_gdb_pretty_printer_section]` attribute is just used for the Rust test suite",
),
rustc_attr!(
TEST, pattern_complexity, CrateLevel, template!(NameValueStr: "N"),
ErrorFollowing, @only_local: true,
ErrorFollowing, EncodeCrossCrate::No,
),
];
@@ -1004,10 +1070,14 @@ pub fn is_builtin_attr_name(name: Symbol) -> bool {
BUILTIN_ATTRIBUTE_MAP.get(&name).is_some()
}
/// Whether this builtin attribute is only used in the local crate.
/// If so, it is not encoded in the crate metadata.
pub fn is_builtin_only_local(name: Symbol) -> bool {
BUILTIN_ATTRIBUTE_MAP.get(&name).is_some_and(|attr| attr.only_local)
/// Whether this builtin attribute is encoded cross crate.
/// This means it can be used cross crate.
pub fn encode_cross_crate(name: Symbol) -> bool {
if let Some(attr) = BUILTIN_ATTRIBUTE_MAP.get(&name) {
if attr.encode_cross_crate == EncodeCrossCrate::Yes { true } else { false }
} else {
true
}
}
pub fn is_valid_for_get_attr(name: Symbol) -> bool {
compiler/rustc_feature/src/lib.rs
+1 -1
View File
@@ -124,7 +124,7 @@ pub fn find_feature_issue(feature: Symbol, issue: GateIssue) -> Option<NonZero<u
pub use accepted::ACCEPTED_FEATURES;
pub use builtin_attrs::AttributeDuplicates;
pub use builtin_attrs::{
deprecated_attributes, find_gated_cfg, is_builtin_attr_name, is_builtin_only_local,
deprecated_attributes, encode_cross_crate, find_gated_cfg, is_builtin_attr_name,
is_valid_for_get_attr, AttributeGate, AttributeTemplate, AttributeType, BuiltinAttribute,
GatedCfg, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP,
};
compiler/rustc_metadata/src/rmeta/encoder.rs
+2 -2
View File
@@ -817,8 +817,8 @@ struct AnalyzeAttrState {
#[inline]
fn analyze_attr(attr: &Attribute, state: &mut AnalyzeAttrState) -> bool {
let mut should_encode = false;
if rustc_feature::is_builtin_only_local(attr.name_or_empty()) {
// Attributes marked local-only don't need to be encoded for downstream crates.
if !rustc_feature::encode_cross_crate(attr.name_or_empty()) {
// Attributes not marked encode-cross-crate don't need to be encoded for downstream crates.
} else if attr.doc_str().is_some() {
// We keep all doc comments reachable to rustdoc because they might be "imported" into
// downstream crates if they use `#[doc(inline)]` to copy an item's documentation into
compiler/rustc_middle/src/ty/mod.rs
+2 -8
View File
@@ -1752,9 +1752,8 @@ pub fn get_attrs(
let filter_fn = move |a: &&ast::Attribute| a.has_name(attr);
if let Some(did) = did.as_local() {
self.hir().attrs(self.local_def_id_to_hir_id(did)).iter().filter(filter_fn)
} else if cfg!(debug_assertions) && rustc_feature::is_builtin_only_local(attr) {
bug!("tried to access the `only_local` attribute `{}` from an extern crate", attr);
} else {
debug_assert!(rustc_feature::encode_cross_crate(attr));
self.item_attrs(did).iter().filter(filter_fn)
}
}
@@ -1786,12 +1785,7 @@ pub fn get_attr(self, did: impl Into<DefId>, attr: Symbol) -> Option<&'tcx ast::
/// Determines whether an item is annotated with an attribute.
pub fn has_attr(self, did: impl Into<DefId>, attr: Symbol) -> bool {
let did: DefId = did.into();
if cfg!(debug_assertions) && !did.is_local() && rustc_feature::is_builtin_only_local(attr) {
bug!("tried to access the `only_local` attribute `{}` from an extern crate", attr);
} else {
self.get_attrs(did, attr).next().is_some()
}
self.get_attrs(did, attr).next().is_some()
}
/// Returns `true` if this is an `auto trait`.