Class foo

example/terse.cpp:12–27

constexpr auto sum = [](auto... args) { return (0 + ... + args); };

struct foo {
  int a{};
  bool b{};

  constexpr auto operator==(const foo& other) const {
    return a == other.a and b == other.b;
  }

  constexpr auto operator!=(const foo& other) const {
    return not(*this == other);
  }

  friend auto& operator<<(std::ostream& os, const foo& f) {
    return (os << "foo{" << f.a << ',' << f.b << '}');
  }
};

int main() {
  using boost::ut::operator""_test;