[libcxx-commits] [libcxx] [libc++] Implement C++29 Bit Permutations P3104R6 (PR #217820)

[A. Jiang via libcxx-commits]

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frederick-vs-ja wrote:

I think this test file should be refactored into the conventional style, where each `expr_i` is an expression that should be verified at both constant evaluation and run time.

```c++
// #include <...>
#include <cassert>
// #include <...>

constexpr bool test() {
  // ...
  assert(expr_1);
  // ...
  assert(expr_n);

  return true;
}

int main(int, char**) {
  test();
  static_cast(test());

  return 0;
}
```

https://github.com/llvm/llvm-project/pull/217820