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Stabilise const_char_encode_utf8. #131463

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merged 1 commit into from
Oct 12, 2024
Merged

Stabilise const_char_encode_utf8. #131463

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7 changes: 5 additions & 2 deletions library/core/src/char/methods.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -674,8 +674,9 @@ impl char {
/// 'ß'.encode_utf8(&mut b);
/// ```
#[stable(feature = "unicode_encode_char", since = "1.15.0")]
#[rustc_const_unstable(feature = "const_char_encode_utf8", issue = "130512")]
#[rustc_const_stable(feature = "const_char_encode_utf8", since = "CURRENT_RUSTC_VERSION")]
#[inline]
#[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
pub const fn encode_utf8(self, dst: &mut [u8]) -> &mut str {
// SAFETY: `char` is not a surrogate, so this is valid UTF-8.
unsafe { from_utf8_unchecked_mut(encode_utf8_raw(self as u32, dst)) }
Expand Down Expand Up @@ -1770,9 +1771,11 @@ const fn len_utf16(code: u32) -> usize {
/// Panics if the buffer is not large enough.
/// A buffer of length four is large enough to encode any `char`.
#[unstable(feature = "char_internals", reason = "exposed only for libstd", issue = "none")]
#[rustc_const_unstable(feature = "const_char_encode_utf8", issue = "130512")]
#[rustc_const_stable(feature = "const_char_encode_utf8", since = "CURRENT_RUSTC_VERSION")]
#[doc(hidden)]
#[inline]
#[rustc_allow_const_fn_unstable(const_eval_select)]
#[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
pub const fn encode_utf8_raw(code: u32, dst: &mut [u8]) -> &mut [u8] {
const fn panic_at_const(_code: u32, _len: usize, _dst_len: usize) {
// Note that we cannot format in constant expressions.
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1 change: 0 additions & 1 deletion library/core/src/lib.rs
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Expand Up @@ -119,7 +119,6 @@
#![feature(const_bigint_helper_methods)]
#![feature(const_black_box)]
#![feature(const_char_encode_utf16)]
#![feature(const_char_encode_utf8)]
#![feature(const_eval_select)]
#![feature(const_exact_div)]
#![feature(const_float_classify)]
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