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swig/Lib/python/std_common.i

+%include <std/std_except.i>
+%include <pystdcommon.swg>
+
+
+/*
+  Generate the traits for a 'primitive' type, such as 'double',
+  for which the SWIG_AsVal and SWIG_From methods are already defined.
+*/
+
+%define %traits_ptypen(Type...)
+  %fragment(SWIG_Traits_frag(Type),"header",
+            fragment=SWIG_AsVal_frag(Type),
+            fragment=SWIG_From_frag(Type),
+            fragment="StdTraits") {
+namespace swig {
+  template <> struct traits<Type > {
+    typedef value_category category;
+    static const char* type_name() { return  #Type; }
+  };  
+  template <>  struct traits_asval<Type > {   
+    typedef Type value_type;
+    static int asval(PyObject *obj, value_type *val) { 
+      return SWIG_AsVal(Type)(obj, val);
+    }
+  };
+  template <>  struct traits_from<Type > {
+    typedef Type value_type;
+    static PyObject *from(const value_type& val) {
+      return SWIG_From(Type)(val);
+    }
+  };
+}
+}
+%enddef
+
+
+%include <std/std_common.i>
+
+//
+// Generates the traits for all the known primitive
+// C++ types (int, double, ...)
+//
+%apply_cpptypes(%traits_ptypen);
+