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drag_and_drop_converter_concept.hpp
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00001 /* 00002 Copyright 2007 Adobe Systems Incorporated 00003 Distributed under the MIT License (see accompanying file LICENSE_1_0_0.txt 00004 or a copy at http://stlab.adobe.com/licenses.html) 00005 */ 00006 00007 /**************************************************************************************************/ 00008 00009 #ifndef ADOBE_DRAG_AND_DROP_CONVERTER_CONCEPT_HPP 00010 #define ADOBE_DRAG_AND_DROP_CONVERTER_CONCEPT_HPP 00011 00012 /**************************************************************************************************/ 00013 00014 #include <boost/concept_check.hpp> 00015 #include <boost/ref.hpp> 00016 00017 #include <adobe/regular_concept.hpp> 00018 00019 /**************************************************************************************************/ 00020 00021 namespace adobe { 00022 00023 /*************************************************************************************************/ 00031 /*************************************************************************************************/ 00032 00036 template <class Converter> 00037 struct dnd_converter_source_type 00038 { 00039 typedef typename boost::unwrap_reference<Converter>::type::source_type type; 00040 }; 00041 00042 /*************************************************************************************************/ 00043 00047 template <class Converter> 00048 struct dnd_converter_dest_type 00049 { 00050 typedef typename boost::unwrap_reference<Converter>::type::dest_type type; 00051 }; 00052 00053 /*************************************************************************************************/ 00057 template <class DNDC> // DNDC models DragAndDropConverter 00058 inline typename dnd_converter_dest_type<DNDC>::type 00059 convert(const DNDC& dndc, 00060 const typename dnd_converter_source_type<DNDC>::type& raw_value) 00061 { return dndc.convert(raw_value); } 00062 00063 /*************************************************************************************************/ 00069 template <class DragAndDropConverter> 00070 struct DragAndDropConverterConcept 00071 { 00073 typedef typename dnd_converter_source_type<DragAndDropConverter>::type source_type; 00074 typedef typename dnd_converter_dest_type<DragAndDropConverter>::type dest_type; 00075 00078 static dest_type convert(const DragAndDropConverter& converter, const source_type& src_value) 00079 { 00080 using adobe::convert; 00081 return convert(converter, src_value); 00082 } 00083 00084 #ifndef ADOBE_NO_DOCUMENTATION 00085 // Concept checking: 00086 // Use pointers since not required to be default constructible 00087 00088 const DragAndDropConverter* converter; 00089 source_type* src_value; 00090 dest_type* dest_value; 00091 #endif 00092 00094 void constraints() { 00095 // associated types: 00096 typedef typename dnd_converter_source_type<DragAndDropConverter>::type associated_type1; 00097 typedef typename dnd_converter_dest_type<DragAndDropConverter>::type associated_type2; 00098 00099 using adobe::convert; 00100 convert(*converter, *src_value); 00101 } 00102 }; 00103 00108 template <class DragAndDropConverter> 00109 struct DragAndDropConverterConcept<boost::reference_wrapper<DragAndDropConverter> > : 00110 DragAndDropConverterConcept<DragAndDropConverter> 00111 { 00112 void constraints() { 00113 //boost concept check lib gets confused on VC8 without this 00114 DragAndDropConverterConcept<DragAndDropConverter>::constraints(); 00115 } 00116 }; 00117 00118 /*************************************************************************************************/ 00119 00120 } // namespace adobe 00121 00122 /**************************************************************************************************/ 00123 00124 // ADOBE_DRAG_AND_DROP_CONVERTER_CONCEPT_HPP 00125 #endif 00126 00127 /**************************************************************************************************/ | ||||||
