diff options
Diffstat (limited to 'library/core/src/char/methods.rs')
| -rw-r--r-- | library/core/src/char/methods.rs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/library/core/src/char/methods.rs b/library/core/src/char/methods.rs index ccfdbf0eb70..85cc315626d 100644 --- a/library/core/src/char/methods.rs +++ b/library/core/src/char/methods.rs @@ -71,6 +71,16 @@ impl char { #[stable(feature = "assoc_char_consts", since = "1.52.0")] pub const MAX: char = '\u{10FFFF}'; + /// The maximum number of bytes required to [encode](char::encode_utf8) a `char` to + /// UTF-8 encoding. + #[unstable(feature = "char_max_len", issue = "121714")] + pub const MAX_LEN_UTF8: usize = 4; + + /// The maximum number of two-byte units required to [encode](char::encode_utf16) a `char` + /// to UTF-16 encoding. + #[unstable(feature = "char_max_len", issue = "121714")] + pub const MAX_LEN_UTF16: usize = 2; + /// `U+FFFD REPLACEMENT CHARACTER` (�) is used in Unicode to represent a /// decoding error. /// @@ -1168,6 +1178,7 @@ impl char { #[must_use] #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")] #[rustc_const_stable(feature = "const_char_is_ascii", since = "1.32.0")] + #[cfg_attr(not(test), rustc_diagnostic_item = "char_is_ascii")] #[inline] pub const fn is_ascii(&self) -> bool { *self as u32 <= 0x7F |