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Add doc example for std::io::sink. #34524

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Jun 28, 2016
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Add doc example for std::io::sink. #34524

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10 changes: 10 additions & 0 deletions src/libstd/io/util.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,16 @@ pub struct Sink { _priv: () }
///
/// All calls to `write` on the returned instance will return `Ok(buf.len())`
/// and the contents of the buffer will not be inspected.
///
/// # Examples
///
/// ```rust
/// use std::io::{self, Write};
///
/// let mut buffer = vec![1, 2, 3, 5, 8];
/// let num_bytes = io::sink().write(&mut buffer).unwrap();
/// assert_eq!(num_bytes, 5);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
pub fn sink() -> Sink { Sink { _priv: () } }

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