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Rollup merge of #47807 - tbu-:pr_doc_constanttime_cstr, r=steveklabnik

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Make wording around 0-cost casts more precise
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kennytm 2018-02-06 02:13:50 +08:00 committed by GitHub
commit e8688b4a24
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1 changed files with 9 additions and 9 deletions
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18
src/libstd/ffi/c_str.rs
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@ -1026,9 +1026,9 @@ impl CStr {
/// The returned slice will **not** contain the trailing nul terminator that this C
/// string has.
///
/// > **Note**: This method is currently implemented as a 0-cost cast, but
/// > it is planned to alter its definition in the future to perform the
/// > length calculation whenever this method is called.
/// > **Note**: This method is currently implemented as a constant-time
/// > cast, but it is planned to alter its definition in the future to
/// > perform the length calculation whenever this method is called.
///
/// # Examples
///
@ -1077,9 +1077,9 @@ impl CStr {
/// it will return an error with details of where UTF-8 validation failed.
///
/// > **Note**: This method is currently implemented to check for validity
/// > after a 0-cost cast, but it is planned to alter its definition in the
/// > future to perform the length calculation in addition to the UTF-8
/// > check whenever this method is called.
/// > after a constant-time cast, but it is planned to alter its definition
/// > in the future to perform the length calculation in addition to the
/// > UTF-8 check whenever this method is called.
///
/// [`&str`]: ../primitive.str.html
///
@ -1110,9 +1110,9 @@ impl CStr {
/// with the result.
///
/// > **Note**: This method is currently implemented to check for validity
/// > after a 0-cost cast, but it is planned to alter its definition in the
/// > future to perform the length calculation in addition to the UTF-8
/// > check whenever this method is called.
/// > after a constant-time cast, but it is planned to alter its definition
/// > in the future to perform the length calculation in addition to the
/// > UTF-8 check whenever this method is called.
///
/// [`Cow`]: ../borrow/enum.Cow.html
/// [`Borrowed`]: ../borrow/enum.Cow.html#variant.Borrowed