Re: [Boost-users] Wild Compile Errors with ptime member

From: Gennadiy Rozental (gennadiy.rozental_at_[hidden])
Date: 2006-01-03 17:32:06

>I am running Boost 1.33.0 and compiling wiht MinGW.  When I compile
> the following source file
>
> =========================
> #include "boost/shared_ptr.hpp"
> #include "boost/test/test_tools.hpp"
> #include "boost/date_time/posix_time/posix_time_types.hpp"
>
> class foo {
> public:
>    foo() {}
>    ~foo() {}
>   boost::posix_time::ptime mExecutionStart;
> };
>
> class foo_test {
>    foo_test();
>    ~foo_test();
>    void run();
> };
>
> void foo_test::run() {
>    boost::shared_ptr<foo> testObj(new foo());
> BOOST_CHECK_EQUAL(testObj->mExecutionStart,
>                                          testObj->mExecutionStart);
> };
> =================================
>
> I get the (lengthy) compiler error output below.  As you can see,
> something seems to be trying to log something to an output
> stream.
>
> The test compile just fine as long as the BOOST_CHECK_EQUAL()
> doesn't reference a boost::posix_time::ptime variables.
>
> Any ideas?
>
> Merrill Cornish
>
> =================================
>
> E:/Dev-Cpp/Workflow/boost/include/boost/test/test_tools.hpp: In member 
> function `void 
> boost::test_tools::tt_detail::print_log_value<T>::operator()(std::ostream&, 
> const T&) [with T = boost::posix_time::ptime]':
> E:/Dev-Cpp/Workflow/boost/include/boost/test/test_tools.hpp:372: 
> instantiated from `std::ostream& 
> boost::test_tools::tt_detail::operator<<(std::ostream&, const 
> boost::test_tools::tt_detail::print_helper_t<T>&) [with T = 
> boost::posix_time::ptime]'
> E:/Dev-Cpp/Workflow/boost/include/boost/test/utils/wrap_stringstream.hpp:66: 
> instantiated from `boost::basic_wrap_stringstream<CharT>& 
> boost::operator<<(boost::basic_wrap_stringstream<CharT>&, const T&) [with 
> CharT = char, T = 
> boost::test_tools::tt_detail::print_helper_t<boost::posix_time::ptime>]'
> E:/Dev-Cpp/Workflow/boost/include/boost/test/test_tools.hpp:427: 
> instantiated from `void boost::test_tools::tt_detail::check_frwd(Pred, 
> boost::wrap_stringstream&, boost::test_tools::const_string, size_t, 
> boost::test_tools::tt_detail::tool_level, 
> boost::test_tools::tt_detail::check_type, const Arg0&, const char*, const 
> Arg1&, const char*) [with Pred = 
> boost::test_tools::tt_detail::equal_impl_frwd, Arg0 = 
> boost::posix_time::ptime, Arg1 = boost::posix_time::ptime]'
> E:/Dev-Cpp/Workflow/test/src/TimeDemo.cc:19:   instantiated from here
> E:/Dev-Cpp/Workflow/boost/include/boost/test/test_tools.hpp:274: error: no 
> match for 'operator<<' in 'ostr << t'

You need an output operator << for the boost::posix_time::ptime to be able 
to print values in test log.

Gennadiy