Advertisements I have a method that returns the expiration date of a subscription and uses boost::posix_time::time_facet to convert Unix time format to string. In tutorials I’ve seen, time_facet is created using the "new" keyword, but I haven’t seen any examples using "delete" (like in this thread). Should I free memory after using time_facet or does… Read More Should i free memory when i am using boost::posix_time::time_facet

Advertisements The following piece of code works fine: #include <span> #include <boost/container/static_vector.hpp> #include <iostream> #include <vector> int main(){ boost::container::static_vector<int, 10> x{1,2,3}; std::vector y{1,2,3}; for(const auto& i : std::span(y.begin()+1, y.end())) std::cout << i << ‘\n’; } but will fail at compile if i try to use x in place of y in the ranged for loop:… Read More template argument deduction compile error with boost's `static_vector`

Advertisements I have something like below, but unable to compile it. I don’t get it why I can’t have different type when my variable can hold different types? My code: #include <boost/variant.hpp> #include <iostream> typedef boost::variant<int, float, double, std::string> MultiType; int main() { int a = 1; std::string b = "b"; bool c = true;… Read More why can't use ternary operator with different types when boost variable can hold multiple types?

Advertisements I have a boost::geometry::model::polygon<Point> Algorithm::poly and i’m looking for the area of the polygon with area = bg::area(poly); the result is 1.10434e+08 When i’m reading the documentation, i can see "The units are the square of the units used for the points defining the surface". I really don’t understand what it means. https://www.boost.org/doc/libs/1_65_0/libs/geometry/doc/html/geometry/reference/algorithms/area/area_1.html I… Read More Area of Boost c++ in Square Meters

Advertisements Consider: #include <boost/any.hpp> #include <iostream> #include <vector> #include <string> int main() { //Code snippet 1 boost::any variable(std::string("Hello ")); std::string* string_ptr_any = boost::any_cast<std::string>(&variable); std::cout << "Pointer value is " << string_ptr_any <<", variable’s address is " << &variable << std::endl; //End Code snippet 1 //Code snippet 2 std::string normalstring = "hello_normal"; std::string* normalstringptr = &normalstring;… Read More Taking the address of a boost::any variable

Advertisements I’m trying to use boost::circular_buffer to manage fixed size of the queue. To do that, I wrap boost::circular_buffer by using class Something. class Something { public: Something(); private: boost::circular_buffer<int> buffer; }; Here, the problem is that class Something should wrap iterator of buffer. For example, If I use std::vector<int>, it is simple: class Something… Read More How to wrap iterator of boost::circular_buffer?