[Bug c++/96575] std::ranges::sort is not usable as a 'constexpr' function when saving its return value in lambda function

[hewillk at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96575

--- Comment #1 from 康桓瑋 <hewillk at gmail dot com> ---
I don't know whether this is same issue or not:

#include <algorithm>

constexpr auto replace = [](auto old_x, auto new_x) { 
  return [=](auto r) {
    return std::ranges::replace(r, old_x, new_x);
  };
};

// this one is ok
constexpr auto f1(auto algo) {
  [=]() {
    algo(std::array{0});
    return 0;
  }();
  return true;
}

// this one fails with non-constant condition
constexpr auto f2(auto algo) {
  constexpr auto it = [=]() {
    algo(std::array{0});
    return 0;
  }();
  return true;
}

static_assert(f1(replace(0, 1)));
static_assert(f2(replace(0, 1)));

(https://godbolt.org/z/Kaq4j5)