Re: Putting the match expression in constant expressions in PHP 8.0 or 8.1

On Fri, Aug 7, 2020 at 7:22 PM tyson andre <tysonandre775@hotmail.com> wrote: > The match expression can be thought of as a much more concise/readable > equivalent to chained ternary operators. > I'm proposing allowing matches in constant expressions when all parts of > the match are constant expressions. > > That seems pretty reasonable. > 1. Should this target 8.0 or 8.1? I'm leaning towards 8.1 since the beta > is already out. > 8.1, the 8.0 ship has sailed. > 2. Are there objections to doing this? > Not from me, though I don't think I'd use it personally. > 3. Should/shouldn't php enforce that the default arm exists for match *in > constant expressions* > (constant expressions can already throw errors when evaluated for > various reasons, but UnhandledMatchError is new) > Such a construct would be compile-time evaluated, so not having a match should result in a compile error. Having a default should be considered best-practice (to avoid surprise compile failures), but I don't think it needs to be a hard-requirement. -Sara