Boost C++ Application Development Cookbook - Second Edition

How to do it...

1. Let's start by writing a date-time structure that will hold a parsed result:

#include <stdexcept>#include <cassert> struct datetime {    enum zone_offsets_t {        OFFSET_NOT_SET,        OFFSET_Z,        OFFSET_UTC_PLUS,        OFFSET_UTC_MINUS    };private:    unsigned short year_;    unsigned short month_;    unsigned short day_;    unsigned short hours_;    unsigned short minutes_;    unsigned short seconds_;    zone_offsets_t zone_offset_type_;    unsigned int zone_offset_in_min_;    static void dt_assert(bool v, const char* msg) {        if (!v) {            throw std::logic_error(                "Assertion failed in datetime: " + std::string(msg)            );        }    } public:    datetime()        : year_(0), month_(0), day_(0)        , hours_(0), minutes_(0), seconds_(0)        , zone_offset_type_(OFFSET_NOT_SET), zone_offset_in_min_(0)    {} // ...