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Add tests and comments about read_to_string and read_line specializations

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Benoît du Garreau 2023-06-12 18:17:48 +02:00
parent cba6e102ec
commit ebc5970329
2 changed files with 17 additions and 0 deletions
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6
library/std/src/io/mod.rs
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@ -2405,6 +2405,9 @@ impl<T: Read, U: Read> Read for Chain<T, U> {
Ok(read)
}
// We don't override `read_to_string` here because an UTF-8 sequence could
// be split between the two parts of the chain
fn read_buf(&mut self, mut buf: BorrowedCursor<'_>) -> Result<()> {
if buf.capacity() == 0 {
return Ok(());
@ -2454,6 +2457,9 @@ impl<T: BufRead, U: BufRead> BufRead for Chain<T, U> {
read += self.second.read_until(byte, buf)?;
Ok(read)
}
// We don't override `read_line` here because an UTF-8 sequence could be
// split between the two parts of the chain
}
impl<T, U> SizeHint for Chain<T, U> {