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libcore: add a str::with_capacity to match the fn in vec #3706

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Merged
merged 1 commit into from
Oct 17, 2012
Merged

libcore: add a str::with_capacity to match the fn in vec #3706

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5 changes: 5 additions & 0 deletions src/libcore/str.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1473,6 +1473,11 @@ pub pure fn from_utf16(v: &[u16]) -> ~str {
move buf
}

pub pure fn with_capacity(capacity: uint) -> ~str {
let mut buf = ~"";
unsafe { reserve(&mut buf, capacity); }
move buf
}

/**
* As char_len but for a slice of a string
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