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Add default keyword for specialization

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This commit is contained in:
Xavientois 2021-01-15 18:45:00 -05:00
parent 5f60a3048e
commit eea99f491b
1 changed files with 5 additions and 5 deletions
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10
library/std/src/io/mod.rs
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@ -2481,10 +2481,6 @@ impl<R: Read + SizeHint> Iterator for Bytes<R> {
#[stable(feature = "bufreader_size_hint", since = "1.51.0")] #[stable(feature = "bufreader_size_hint", since = "1.51.0")]
trait SizeHint { trait SizeHint {
fn lower_bound(&self) -> usize {
0
}
fn upper_bound(&self) -> Option<usize> { fn upper_bound(&self) -> Option<usize> {
None None
} }
@ -2495,7 +2491,11 @@ trait SizeHint {
} }
#[stable(feature = "bufreader_size_hint", since = "1.51.0")] #[stable(feature = "bufreader_size_hint", since = "1.51.0")]
impl<T> SizeHint for T {} impl<T> SizeHint for T {
default fn lower_bound(&self) -> usize {
0
}
}
#[stable(feature = "bufreader_size_hint", since = "1.51.0")] #[stable(feature = "bufreader_size_hint", since = "1.51.0")]
impl<T> SizeHint for BufReader<T> { impl<T> SizeHint for BufReader<T> {