#include "testutilities.h"
#include <sigc++/sigc++.h>
#include <sstream>
#include <string>
#include <cstdlib>
namespace
{
std::ostringstream result_stream;
class Param : public sigc::trackable
{
public:
Param(const std::string& name)
: name_(name)
{}
//non-copyable,
//so it can only be used with sigc::bind() via std::ref()
Param(const Param&) = delete;
Param& operator=(const Param&) = delete;
//non movable:
Param(Param&&) = delete;
Param& operator=(Param&&) = delete;
std::string name_;
};
void handler(Param& param)
{
result_stream << " handler(param): param.name_=" << param.name_;
}
} // end anonymous namespace
int main(int argc, char* argv[])
{
auto util = TestUtilities::get_instance();
if (!util->check_command_args(argc, argv))
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
auto slot_full = sigc::ptr_fun(&handler);
sigc::slot<void> slot_bound;
slot_bound();
util->check_result(result_stream, "");
{
//Because Param derives from sigc::trackable(), std::ref() should disconnect
// the signal handler when param is destroyed.
Param param("murrayc");
// A convoluted way to do
// slot_bound = sigc::bind(slot_full, std::ref(param));
slot_bound = sigc::bind< -1, std::reference_wrapper<Param> >(slot_full, std::ref(param));
result_stream << "Calling slot when param exists:";
slot_bound();
util->check_result(result_stream,
"Calling slot when param exists: handler(param): param.name_=murrayc");
} // auto-disconnect
result_stream << "Calling slot when param does not exist:";
slot_bound();
util->check_result(result_stream, "Calling slot when param does not exist:");
// This causes a crash when using g++ 3.3.4 or 3.3.5 (but not 3.4.x) when not specifying
// the exact template specialization in visit_each_type() - see the comments there.
// It looks like the auto-disconnect does not work, so the last slot_bound() call tries
// to access the param data again.
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
}