Great! Yes, changing the diagnostic message will save people from having to ask this question.
Thanks, Ed On Fri, May 19, 2017 at 10:30 AM, Devin Coughlin <dcough...@apple.com> wrote: > Hi Ed, > > On May 19, 2017, at 10:10 AM, Edward Connell via swift-users < > swift-users@swift.org> wrote: > > I just switched to the 5/17 swift 4.0 tool chain on Linux, and I am > getting the following complaint when using swap on array elements. Is this > warning legitimate because of a copy on write issue? If so, is there some > new swap function for array elements? I realize I can turn 1 line into 3 > and do the swapping myself, it's just verbose. > > *warning: simultaneous accesses to var 'dims', but modification requires > exclusive access; consider copying to a local variable* > * swap(&dims[lastIndex], > &dims[lastIndex-1])* > > > You can use the new swapAt() method: > > dims.swapAt(lastIndex, lastIndex-1) > > I recently added a Fix-It for this — but we really should also say > "consider using ‘swapAt()’” in the diagnostic text as well in this case > rather then mentioning copying to a local. > > Devin > > >
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