I found the following class definition in the boost library 1.71.0 which is installed at /usr/include/boost in my case.
class BOOST_SYMBOL_VISIBLE seconds : public time_duration
{
public:
template <typename T>
explicit seconds(T const& s,
typename boost::enable_if<boost::is_integral<T>, void>::type* = BOOST_DATE_TIME_NULLPTR) :
time_duration(0,0, numeric_cast<sec_type>(s))
{}
};
The Above class definition can be found out at /usr/include/boost/date_time/posix_time/posix_time_duration.hpp
I am using following code-snippet where the class boost::posix_time::seconds is instantiated:
#include <boost/asio.hpp>
#include <boost/array.hpp>
#include <boost/format.hpp>
#include <boost/bind.hpp>
#include <boost/serialization/access.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/shared_array.hpp>
#include <boost/algorithm/string.hpp>
#include <chrono>
#include <vector>
#include <boost/date_time/posix_time/posix_time_duration.hpp>
int main()
{
boost::asio::io_service io_service;
boost::asio::ip::tcp::socket socket(io_service);
boost::asio::deadline_timer timer(io_service);
timer.expires_from_now(boost::posix_time::seconds(60.0))
return 0;
}
Let's say I save the above code-snippet with the file name boost.cpp. Then I compile boost.cpp using the command
g++ -I /usr/include/boost -pthread boost.cpp
However, I am getting the following error:
boost.cpp: In function ‘int main()’:
boost.cpp:19:59: error: no matching function for call to ‘boost::posix_time::seconds::seconds(double)’
19 | timer.expires_from_now(boost::posix_time::seconds(60.0))
| ^
In file included from /usr/include/boost/date_time/posix_time/posix_time_types.hpp:16,
from /usr/include/boost/asio/time_traits.hpp:23,
from /usr/include/boost/asio/detail/timer_queue_ptime.hpp:22,
from /usr/include/boost/asio/detail/deadline_timer_service.hpp:29,
from /usr/include/boost/asio/basic_deadline_timer.hpp:24,
from /usr/include/boost/asio.hpp:25,
from boost.cpp:1:
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:57:16: note: candidate: ‘template<class T> boost::posix_time::seconds::seconds(const T&, typename boost::enable_if<boost::is_integral<T>, void>::type*)’
57 | explicit seconds(T const& s,
| ^~~~~~~
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:57:16: note: template argument deduction/substitution failed:
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp: In substitution of ‘template<class T> boost::posix_time::seconds::seconds(const T&, typename boost::enable_if<boost::is_integral<T>, void>::type*) [with T = double]’:
boost.cpp:19:59: required from here
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:57:16: error: no type named ‘type’ in ‘struct boost::enable_if<boost::is_integral<double>, void>’
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:53:30: note: candidate: ‘boost::posix_time::seconds::seconds(const boost::posix_time::seconds&)’
53 | class BOOST_SYMBOL_VISIBLE seconds : public time_duration
| ^~~~~~~
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:53:30: note: no known conversion for argument 1 from ‘double’ to ‘const boost::posix_time::seconds&’
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:53:30: note: candidate: ‘boost::posix_time::seconds::seconds(boost::posix_time::seconds&&)’
/usr/include/boost/date_time/posix_time/posix_time_duration.hpp:53:30: note: no known conversion for argument 1 from ‘double’ to ‘boost::posix_time::seconds&&’
What I can think of is the use of the line boost::posix_time::seconds(60.0) is not correct but I am not able to figure out what's the correct way to instantiate the posix_time::seconds class based on the above definitions. Do any of you have an idea about it?
That constructor takes an integral (whole) number. boost::posix_time::seconds(60) should work.