Re^5: Logical/defined or as lvalue

That makes PHP's Elvis operator a value-preserving logical-OR operator, like Perl's ||.

According to the article, || also has this function in Common Lisp, Clojure, Lua, Object Pascal, Python, Ruby, and JavaScript. It's rather disingenuous to call the article "Elvis operator".

In C, || is normalizes the value to 0 or 1.

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Re^6: Logical/defined or as lvalue by jo37 (Curate) on Sep 04, 2024 at 18:36 UTC
In retrospective, I shouldn't have brought up `\|\|` as I don't see any use for an lvalue expression `X \|\| Y` neither, which would be equivalent to the "Elvis operator". A possible novelty could be a binary operator that: acts like `defined(X) ? X : Y` yields an lvalue, provided `X` and `Y` are lvalues evaluates `X` only once If `X // Y` was an lvalue, it would satisfy these criteria. As it currently isn't, it could hardly break anything as such usage doesn't compile. No new operator, just an extension. In a Perlish sense: One more way to do it. Greetings, 🐻 `$gryYup$d0ylprbpriprrYpkJl2xyl~rzg??P~5lp2hyl0p$`	[reply] [d/l] [select]
Re^7: Logical/defined or as lvalue by ikegami (Patriarch) on Sep 04, 2024 at 21:05 UTC
Everything I said about `\|\|` also applies to `//`. You only mention backwards-compatibility which wasn't even an issue I raised.	[reply] [d/l] [select]