Assertion 'nothrow' clashes with libstdc++ declaration

[JonasToth]

Expected Behavior

As the example demonstrate, exception tests can be performed using the nothrow function. This should work as documented, without full namespace qualification, but doesn't.

It would be great if a non-ambiguous version of nothrow is provided, maybe throwsnot or so? As workaround it is always possible to use a using namespace boost; ut::nothrow(); version of your code. At least the documentation should be copy-pastable.

Actual Behavior

The nothrow is ambiguous with std::nothrow

Steps to Reproduce the Problem

#include <boost/ut.hpp>
#include <memory>

int main(int argc, char **argv) {
  using namespace boost::ut;
  using namespace std;

  "simplest_usage"_test = [] {
    // Does compile.
    expect(boost::ut::nothrow([] {}));
    // Does not compile.
    expect(nothrow([] {}));
  };
  return EXIT_SUCCESS;
}

Compiler Errors (its german, but effectively ambigous definition bla)

../src/GPIO/Wiring.test.cpp:8:39: Fehler: Referenz auf »nothrow« ist mehrdeutig
    8 |   "simplest_usage"_test = [] { expect(nothrow([] {})); };
      |                                       ^~~~~~~
In Datei, eingebunden von ../src/GPIO/Wiring.test.cpp:1:
/home/jonas/.conan2/p/boosta5a53d3219b46/p/include/ut-2.1.0/include/boost/ut.hpp:3014:30: Anmerkung: Kandidaten sind: »template<class TExpr> constexpr auto boost::ext::ut::v2_1_0::nothrow(const TExpr&)«
 3014 | [[nodiscard]] constexpr auto nothrow(const TExpr& expr) {
      |                              ^~~~~~~
In Datei, eingebunden von /usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14/bits/stl_iterator.h:75,
                 von /usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14/bits/stl_algobase.h:67,
                 von /usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14/algorithm:60,
                 von /home/jonas/.conan2/p/boosta5a53d3219b46/p/include/ut-2.1.0/include/boost/ut.hpp:75:
/usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14/new:104:26: Anmerkung:                  »const std::nothrow_t std::nothrow«
  104 |   extern const nothrow_t nothrow;
      |                          ^~~~~~~

Specifications

• Version: 2.1.0, installed with conan
• Platform: Gentoo Linux, GCC-14.2.1 (compile from latest commit of the branch)