This sounds like a problem that a third-party logging API could handle easily, and there's nothing about Swift's current implementation blocking you or someone else from writing one.
It feels like a fairly specialized use case—it's hard to see it being fundamental enough to argue that it be part of the standard library. On Sat, Jan 14, 2017 at 5:12 PM Amir Michail via swift-evolution < [email protected]> wrote: > > > On Jan 14, 2017, at 8:00 PM, Saagar Jha <[email protected]> wrote: > > > > Why not just add a // TODO or // FIXME comment? > > > > There is no bug. Moreover, you want something that actually executes and > that can give you useful information when the program finishes running. > > > Saagar Jha > > > >> On Jan 14, 2017, at 4:10 PM, Amir Michail via swift-evolution < > [email protected]> wrote: > >> > >> It’s quite common for an assertion/precondition that you thought should > hold actually does not yet there is no bug. In that case, you might want to > remind yourself of this fact by commenting out the assertion/precondition > (instead of deleting it) so that you don’t make the same mistake in the > future by inserting such assertions/preconditions into the code. > >> > >> However, it would be nice to have explicit support for > assertions/preconditions that don’t always hold where there is no bug. > >> > >> For example: > >> > >> preconditionNotAlwaysTrue( list.isEmpty ) > >> > >> When your app finishes running, the IDE could show you all such > preconditions/assertions that you thought fail sometimes that did not fail > in that particular run. In that case, you might consider switching them to > normal preconditions/assertions provided your code has now evolved to the > point where they always hold. > >> _______________________________________________ > >> swift-evolution mailing list > >> [email protected] > >> https://lists.swift.org/mailman/listinfo/swift-evolution > > > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution >
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