Re: [RFC] Context Managers

On Thu, Dec 4, 2025, at 10:46 AM, Larry Garfield wrote: > On Tue, Nov 4, 2025, at 2:13 PM, Larry Garfield wrote: >> Arnaud and I would like to present another RFC for consideration: >> Context Managers. >> >> https://wiki.php.net/rfc/context-managers >> >> You'll probably note that is very similar to the recent proposal from >> Tim and Seifeddine. Both proposals grew out of casual discussion >> several months ago; I don't believe either team was aware that the >> other was also actively working on such a proposal, so we now have two. >> C'est la vie. :-) >> >> Naturally, Arnaud and I feel that our approach is the better one. In >> particular, as Arnaud noted in an earlier reply, __destruct() is >> unreliable if timing matters. It also does not allow differentiating >> between a success or failure exit condition, which for many use cases >> is absolutely mandatory (as shown in the examples in the context >> manager RFC). >> >> The Context Manager proposal is a near direct port of Python's >> approach, which is generally very well thought-out. However, there are >> a few open questions as listed in the RFC that we are seeking feedback >> on. >> >> Discuss. :-) > > More updates to Context Managers: > > * We have added "masking" for the context variable, using essentially > the same technique as the block scope RFC. > * We have added support for try using, as a shorthand for when > you > want to wrap a try-catch-finally around a using statement anyway. > > More details of both are in the RFC. > > As no one seems to have a strong opinion on continue, we will > most > likely proceed with the current approach of matching switch > behavior. > > There doesn't seem to be much interest in making using an > expression, > which I find unfortunate, but that means we'll probably drop that. > Fortunately it is probably possible to change in the future if the need > arises (the way throw was changed). > > --Larry Garfield Since the only feedback on what to use for "as" was that => makes sense, we have changed the RFC to use => instead. So the new syntax is using (new CM() => $cVar) { // Do stuff here. } --Larry Garfield