MSVC fails with:
cpp11_result_of_wrap.cxx(3211): error C2672: 'test_result_impl': no matching overloaded function found
cpp11_result_of_wrap.cxx(3211): error C2893: Failed to specialize function template 'std::result_of<Fun(Arg)>::type test_result_impl(Fun,Arg)'
cpp11_result_of_wrap.cxx(3150): note: see declaration of 'test_result_impl'
cpp11_result_of_wrap.cxx(3211): note: With the following template arguments:
cpp11_result_of_wrap.cxx(3211): note: 'Fun=double (__cdecl *)(double)'
cpp11_result_of_wrap.cxx(3211): note: 'Arg=int'
Try making the second parameter double to match the template.
Avoid deprecations warnings using c++17 and later compiler.
Keep testing using c++11 and c++14 compilers.
Provide simple alternative to keep run time tests working with
c++17 and later compilers.
