A notorious example here of the "not many" is this proposal (i.e. not part of the language yet) for C++: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1371r0.pdf . I think it's an interesting example given that this is a very mature language, not originally designed with pattern matching in mind, where _ is normally an identifier.
Best, D. On Tue, 17 Nov 2020 at 19:30, Brett Cannon <br...@python.org> wrote: > > > On Mon, Nov 16, 2020 at 9:03 AM Tobias Kohn <ko...@tobiaskohn.ch> wrote: > >> Hi Mark, >> >> Thank you for your interest and the questions. >> >> >> 1. This really comes down to how you look at it, or how you define >> pattern matching. The issue here is that the concept of pattern matching >> has grown into a large and somewhat diverse flock of interpretations and >> implementations (as a side note: interestingly enough, some of the only >> universally agreed-upon standards are to use `_` as a wildcard and not to >> mark names that capture/bind values---which are quite exactly the points >> most fiercely debatted here). >> > How many of those languages added pattern matching *later* and not at the > earliest stages of the language (if not from the beginning)? And for those > that added it later, how many of those didn't already have a convention > surrounding "_"? My suspicion is "not many" and "not many". 😉 > > -Brett > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to python-dev-le...@python.org > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/VZHF7GJ637YULIU53MCCH26T4LWJ2YP6/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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