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Stabilize checked slice->str conversion functions #97367

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merged 2 commits into from
Jun 19, 2022
+6 −5
Merged

Stabilize checked slice->str conversion functions #97367

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138aa99
Stabilize checked slice->str conversion functions
WaffleLapkin May 24, 2022
8929535
Allow some internal instability
WaffleLapkin May 26, 2022
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5 changes: 3 additions & 2 deletions library/core/src/str/converts.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -82,9 +82,10 @@ use super::Utf8Error;
/// assert_eq!("💖", sparkle_heart);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_const_unstable(feature = "const_str_from_utf8", issue = "91006")]
#[rustc_const_stable(feature = "const_str_from_utf8_shared", since = "1.63.0")]
#[rustc_allow_const_fn_unstable(str_internals)]
pub const fn from_utf8(v: &[u8]) -> Result<&str, Utf8Error> {
// This should use `?` again, once it's `const`
// FIXME: This should use `?` again, once it's `const`
match run_utf8_validation(v) {
Ok(_) => {
// SAFETY: validation succeeded.
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6 changes: 3 additions & 3 deletions library/core/src/str/error.rs
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Expand Up @@ -72,7 +72,7 @@ impl Utf8Error {
/// assert_eq!(1, error.valid_up_to());
/// ```
#[stable(feature = "utf8_error", since = "1.5.0")]
#[rustc_const_unstable(feature = "const_str_from_utf8", issue = "91006")]
#[rustc_const_stable(feature = "const_str_from_utf8_shared", since = "1.63.0")]
#[must_use]
#[inline]
pub const fn valid_up_to(&self) -> usize {
Expand All @@ -95,11 +95,11 @@ impl Utf8Error {
///
/// [U+FFFD]: ../../std/char/constant.REPLACEMENT_CHARACTER.html
#[stable(feature = "utf8_error_error_len", since = "1.20.0")]
#[rustc_const_unstable(feature = "const_str_from_utf8", issue = "91006")]
#[rustc_const_stable(feature = "const_str_from_utf8_shared", since = "1.63.0")]
#[must_use]
#[inline]
pub const fn error_len(&self) -> Option<usize> {
// This should become `map` again, once it's `const`
// FIXME: This should become `map` again, once it's `const`
match self.error_len {
Some(len) => Some(len as usize),
None => None,
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