boost/date_time/gregorian/greg_month.hpp
#ifndef GREG_MONTH_HPP___
#define GREG_MONTH_HPP___
/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
* Author: Jeff Garland, Bart Garst
* $Date: 2008-02-27 12:00:24 -0800 (Wed, 27 Feb 2008) $
*/
#include "boost/date_time/constrained_value.hpp"
#include "boost/date_time/date_defs.hpp"
#include "boost/shared_ptr.hpp"
#include "boost/date_time/compiler_config.hpp"
#include <stdexcept>
#include <string>
#include <map>
#include <algorithm>
#include <cctype>
namespace boost {
namespace gregorian {
typedef date_time::months_of_year months_of_year;
//bring enum values into the namespace
using date_time::Jan;
using date_time::Feb;
using date_time::Mar;
using date_time::Apr;
using date_time::May;
using date_time::Jun;
using date_time::Jul;
using date_time::Aug;
using date_time::Sep;
using date_time::Oct;
using date_time::Nov;
using date_time::Dec;
using date_time::NotAMonth;
using date_time::NumMonths;
//! Exception thrown if a greg_month is constructed with a value out of range
struct bad_month : public std::out_of_range
{
bad_month() : std::out_of_range(std::string("Month number is out of range 1..12")) {}
};
//! Build a policy class for the greg_month_rep
typedef CV::simple_exception_policy<unsigned short, 1, 12, bad_month> greg_month_policies;
//! A constrained range that implements the gregorian_month rules
typedef CV::constrained_value<greg_month_policies> greg_month_rep;
//! Wrapper class to represent months in gregorian based calendar
class BOOST_DATE_TIME_DECL greg_month : public greg_month_rep {
public:
typedef date_time::months_of_year month_enum;
typedef std::map<std::string, unsigned short> month_map_type;
typedef boost::shared_ptr<month_map_type> month_map_ptr_type;
//! Construct a month from the months_of_year enumeration
greg_month(month_enum theMonth) :
greg_month_rep(static_cast<greg_month_rep::value_type>(theMonth)) {}
//! Construct from a short value
greg_month(unsigned short theMonth) : greg_month_rep(theMonth) {}
//! Convert the value back to a short
operator unsigned short() const {return value_;}
//! Returns month as number from 1 to 12
unsigned short as_number() const {return value_;}
month_enum as_enum() const {return static_cast<month_enum>(value_);}
const char* as_short_string() const;
const char* as_long_string() const;
#ifndef BOOST_NO_STD_WSTRING
const wchar_t* as_short_wstring() const;
const wchar_t* as_long_wstring() const;
#endif // BOOST_NO_STD_WSTRING
//! Shared pointer to a map of Month strings (Names & Abbrev) & numbers
static month_map_ptr_type get_month_map_ptr();
/* parameterized as_*_string functions are intended to be called
* from a template function: "... as_short_string(charT c='\0');" */
const char* as_short_string(char) const
{
return as_short_string();
}
const char* as_long_string(char) const
{
return as_long_string();
}
#ifndef BOOST_NO_STD_WSTRING
const wchar_t* as_short_string(wchar_t) const
{
return as_short_wstring();
}
const wchar_t* as_long_string(wchar_t) const
{
return as_long_wstring();
}
#endif // BOOST_NO_STD_WSTRING
};
} } //namespace gregorian
#endif