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Rollup merge of #132948 - RalfJung:const_unicode_case_lookup, r=Noratrieb

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stabilize const_unicode_case_lookup

Fixes https://github.com/rust-lang/rust/issues/101400

See there for t-libs-api FCP
This commit is contained in:
Matthias Krüger 2024-11-12 23:26:43 +01:00 committed by GitHub
commit 978f592539
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GPG Key ID: B5690EEEBB952194
5 changed files with 10 additions and 5 deletions
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6
library/core/src/char/methods.rs
View File

@ -775,13 +775,12 @@ impl char {
/// In a const context:
///
/// ```
/// #![feature(const_unicode_case_lookup)]
/// const CAPITAL_DELTA_IS_LOWERCASE: bool = 'Δ'.is_lowercase();
/// assert!(!CAPITAL_DELTA_IS_LOWERCASE);
/// ```
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_unicode_case_lookup", issue = "101400")]
#[rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0")]
#[inline]
pub const fn is_lowercase(self) -> bool {
match self {
@ -817,13 +816,12 @@ impl char {
/// In a const context:
///
/// ```
/// #![feature(const_unicode_case_lookup)]
/// const CAPITAL_DELTA_IS_UPPERCASE: bool = 'Δ'.is_uppercase();
/// assert!(CAPITAL_DELTA_IS_UPPERCASE);
/// ```
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_unicode_case_lookup", issue = "101400")]
#[rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0")]
#[inline]
pub const fn is_uppercase(self) -> bool {
match self {

1
library/core/src/lib.rs
View File

@ -134,7 +134,6 @@
#![feature(const_type_name)]
#![feature(const_typed_swap)]
#![feature(const_ub_checks)]
#![feature(const_unicode_case_lookup)]
#![feature(core_intrinsics)]
#![feature(coverage_attribute)]
#![feature(do_not_recommend)]

3
library/core/src/unicode/unicode_data.rs
View File

@ -1,6 +1,7 @@
///! This file is generated by `./x run src/tools/unicode-table-generator`; do not edit manually!
#[inline(always)]
#[cfg_attr(bootstrap, rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0"))]
const fn bitset_search<
const N: usize,
const CHUNK_SIZE: usize,
@ -423,6 +424,7 @@ pub mod lowercase {
(5, 187), (6, 78), (7, 132),
];
#[cfg_attr(bootstrap, rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0"))]
pub const fn lookup(c: char) -> bool {
super::bitset_search(
c as u32,
@ -547,6 +549,7 @@ pub mod uppercase {
(2, 146), (2, 20), (3, 146), (3, 140), (3, 134), (4, 178), (4, 171),
];
#[cfg_attr(bootstrap, rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0"))]
pub const fn lookup(c: char) -> bool {
super::bitset_search(
c as u32,

1
src/tools/unicode-table-generator/src/range_search.rs
View File

@ -1,4 +1,5 @@
#[inline(always)]
#[cfg_attr(bootstrap, rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0"))]
const fn bitset_search<
const N: usize,
const CHUNK_SIZE: usize,

4
src/tools/unicode-table-generator/src/raw_emitter.rs
View File

@ -97,6 +97,10 @@ impl RawEmitter {
self.blank_line();
writeln!(
&mut self.file,
r#"#[cfg_attr(bootstrap, rustc_const_stable(feature = "const_unicode_case_lookup", since = "1.84.0"))]"#
).unwrap();
writeln!(&mut self.file, "pub const fn lookup(c: char) -> bool {{").unwrap();
if first_code_point > 0x7f {
writeln!(&mut self.file, " (c as u32) >= {first_code_point:#04x} &&").unwrap();