explicit operator bool does not work with expect()

[rianquinn]

Expected Behavior

The following should compile and work:

    "test bool"_test = [] {
        std::unique_ptr<int> ptr;
        expect(ptr);
    };

Actual Behavior

This does not compile:

/home/user/working/bsl/tests/ifarray.cpp: In lambda function:
/home/user/working/bsl/tests/ifarray.cpp:66:19: error: no matching function for call to ‘expect(std::unique_ptr<int>&)’
   66 |         expect(ptr);
      |                   ^
In file included from /home/user/working/bsl/tests/ifarray.cpp:26:
/home/user/working/bsl/tests/ut.h:1606:9: note: candidate: ‘template<class TExpr, typename std::enable_if<(is_op_v<TExpr> || is_same_v<bool, TExpr>), int>::type <anonymous> > constexpr auto boost::ut::v1_0_0::expect(const TExpr&, const std::experimental::fundamentals_v2::source_location&)’
 1606 |         expect(
      |         ^~~~~~
/home/user/working/bsl/tests/ut.h:1606:9: note:   template argument deduction/substitution failed:
/home/user/working/bsl/tests/ut.h:1604:79: error: no type named ‘type’ in ‘struct std::enable_if<false, int>’
 1604 |                 type_traits::is_op_v<TExpr> or std::is_same_v<bool, TExpr>> = 0>
      |                                                                               ^
make[2]: *** [tests/CMakeFiles/test_ifarray.dir/build.make:63: tests/CMakeFiles/test_ifarray.dir/ifarray.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:246: tests/CMakeFiles/test_ifarray.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

Steps to Reproduce the Problem

1. Just compile the above test

Specifications

• Version: master
• Platform: Fedora 31
• Subsystem: ???

[kris-jusiak]

After some thoughts, I believe that explicitly convertible types should be explicitly static_cast'ed, however, implicit convertible ones should work, which is fixed now by #87