I have a member variable in my class:
class Foo
{
// ...
private:
boost::posix_time::ptime t;
}
I want to initialize it in the constructor to a well known value such that I know it hasn't been set by the program yet:
Foo::Foo()
: t(NULL) // doesnt work
{}
But setting it to NULL doesn't work because its not a pointer.
How do I initialize boost::posix_time::ptime to a well known value?
The default constructor initializes it to boost::posix_time::not_a_date_time. There is a member function to check for that t.is_not_a_date_time(). For more info see the docs.
#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>
class Foo
{
public:
boost::posix_time::ptime t;
Foo() : t() {}
};
int main()
{
Foo foo;
std::cout << std::boolalpha
<< foo.t.is_not_a_date_time() << '\n';
}