[libcxx-commits] [libcxx] [libc++] <algorithm>: __is_callable checks whether the callable can be called with rvalue (PR #73451)

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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ldionne wrote:

You also need to add a test that a predicate like this works for all the algorithms:

```
struct RvalueRefUncallable {
  void operator()(...) && = delete;
  void operator()(...) { implementation }
};
```

Since that was the original bug report IIRC.

https://github.com/llvm/llvm-project/pull/73451