整理

include/boost/date_time/gregorian/greg_year.hpp

@@ -0,0 +1,52 @@
+#ifndef GREG_YEAR_HPP___
+#define GREG_YEAR_HPP___
+
+/* Copyright (c) 2002,2003, 2020 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 
+ * $Date$
+ */
+
+#include <boost/date_time/compiler_config.hpp>
+#include <boost/date_time/constrained_value.hpp>
+#include <stdexcept>
+#include <string>
+
+namespace boost {
+namespace gregorian {
+
+  //! Exception type for gregorian year
+  struct BOOST_SYMBOL_VISIBLE bad_year : public std::out_of_range
+  {
+    bad_year() : 
+      std::out_of_range(std::string("Year is out of valid range: 1400..9999")) 
+    {}
+  };
+  //! Policy class that declares error handling gregorian year type
+  typedef CV::simple_exception_policy<unsigned short, 1400, 9999, bad_year> greg_year_policies;
+
+  //! Generated representation for gregorian year
+  typedef CV::constrained_value<greg_year_policies> greg_year_rep;
+
+  //! Represent a year (range 1400 - 9999) 
+  /*! This small class allows for simple conversion an integer value into
+      a year for the gregorian calendar.  This currently only allows a
+      range of 1400 to 9999.  Both ends of the range are a bit arbitrary
+      at the moment, but they are the limits of current testing of the 
+      library.  As such they may be increased in the future.
+  */
+  class BOOST_SYMBOL_VISIBLE greg_year : public greg_year_rep {
+  public:
+    BOOST_CXX14_CONSTEXPR greg_year(value_type year) : greg_year_rep(year) {}
+    BOOST_CXX14_CONSTEXPR operator value_type()  const {return value_;}
+  };
+
+
+
+} } //namespace gregorian
+
+
+
+#endif