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Clarify interfaction between File::set_len and file cursor #48480

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Mar 13, 2018
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Clarify interfaction between File::set_len and file cursor #48480

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4 changes: 4 additions & 0 deletions src/libstd/fs.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -453,6 +453,10 @@ impl File {
/// will be extended to `size` and have all of the intermediate data filled
/// in with 0s.
///
/// The file's cursor isn't changed. In particular, if the cursor was at the
/// end and the file is shrunk using this operation, the cursor will now be
/// past the end.
///
/// # Errors
///
/// This function will return an error if the file is not opened for writing.
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