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u8::to_string() specialisation (far less asm). #82572

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u8::to_string() specialisation (far less asm). #82572

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9 changes: 9 additions & 0 deletions library/alloc/src/string.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2224,6 +2224,15 @@ impl ToString for char {
}
}

#[stable(feature = "u8_to_string_specialization", since="1.999.0")]
impl ToString for u8 {
#[inline]
fn to_string(&self) -> String {
// Encode utf8 panics if not valid utf8.
String::from((*self as char).encode_utf8(&mut [0; 1]))
}
}

#[stable(feature = "str_to_string_specialization", since = "1.9.0")]
impl ToString for str {
#[inline]
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