Variant

- Merged libexpr changes.

src/CMakeLists.txt

@@ -40,6 +40,7 @@ set (task_SRCS A3.cpp A3.h
                TransportShell.cpp TransportShell.h
                Tree.cpp Tree.h
                Uri.cpp Uri.h
+               Variant.cpp Variant.h
                ViewTask.cpp ViewTask.h
                ViewText.cpp ViewText.h
                dependency.cpp

src/Variant.h

@@ -0,0 +1,107 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2013 - 2014, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef INCLUDED_VARIANT
+#define INCLUDED_VARIANT
+
+#include <string>
+#include <time.h>
+
+class Variant
+{
+public:
+  enum type {type_unknown, type_boolean, type_integer, type_real, type_string,
+             type_date, type_duration};
+
+  Variant ();
+  Variant (const Variant&);
+  Variant (const bool);
+  Variant (const int);
+  Variant (const double);
+  Variant (const std::string&);
+  Variant (const char*);
+  Variant (const time_t, const enum type new_type = type_date);
+  ~Variant ();
+
+  Variant& operator= (const Variant&);
+
+  bool operator&& (const Variant&) const;
+  bool operator|| (const Variant&) const;
+  bool operator_xor (const Variant&) const;
+  bool operator< (const Variant&) const;
+  bool operator<= (const Variant&) const;
+  bool operator> (const Variant&) const;
+  bool operator>= (const Variant&) const;
+  bool operator== (const Variant&) const;
+  bool operator!= (const Variant&) const;
+  bool operator_match (const Variant&) const;
+  bool operator_nomatch (const Variant&) const;
+  bool operator! () const;
+
+  Variant& operator^= (const Variant&);
+  Variant operator^ (const Variant&) const;
+
+  Variant& operator-= (const Variant&);
+  Variant operator-   (const Variant&) const;
+
+  Variant& operator+= (const Variant&);
+  Variant operator+   (const Variant&) const;
+
+  Variant& operator*= (const Variant&);
+  Variant operator*   (const Variant&) const;
+
+  Variant& operator/= (const Variant&);
+  Variant operator/   (const Variant&) const;
+
+  Variant& operator%= (const Variant&);
+  Variant operator%   (const Variant&) const;
+
+  operator std::string () const;
+  void sqrt ();
+
+  void cast (const enum type);
+  int type ();
+
+  bool        get_bool () const;
+  int         get_integer () const;
+  double      get_real () const;
+  std::string get_string () const;
+  time_t      get_date () const;
+  time_t      get_duration () const;
+
+private:
+  enum type   _type;
+  bool        _bool;
+  int         _integer;
+  double      _real;
+  std::string _string;
+  time_t      _date;
+  time_t      _duration;
+};
+
+#endif
+
+////////////////////////////////////////////////////////////////////////////////