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Fix #3475492 - iterating through std::vector wrappers of enumerations.

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12916 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2012-03-13 07:10:24 +00:00
commit 50693941c6
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30
Lib/python/std_common.i
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@ -33,6 +33,36 @@ namespace swig {
}
%enddef
/* Traits for enums. This is bit of a sneaky trick needed because a generic template specialization of enums
is not possible (unless using template meta-programming which SWIG doesn't support because of the explicit
instantiations required using %template). The STL containers define the 'front' method and the typemap
below is used whenever the front method is wrapped returning an enum. This typemap simply picks up the
standard enum typemap, but additionally drags in a fragment containing the traits_asval and traits_from
required in the generated code for enums. */
%define %traits_enum(Type...)
%fragment("SWIG_Traits_enum_"{Type},"header",
fragment=SWIG_AsVal_frag(int),
fragment=SWIG_From_frag(int),
fragment="StdTraits") {
namespace swig {
template <> struct traits_asval<Type > {
typedef Type value_type;
static int asval(PyObject *obj, value_type *val) {
return SWIG_AsVal(int)(obj, (int *)val);
}
};
template <> struct traits_from<Type > {
typedef Type value_type;
static PyObject *from(const value_type& val) {
return SWIG_From(int)((int)val);
}
};
}
}
%typemap(out, fragment="SWIG_Traits_enum_"{Type}) const enum SWIGTYPE& front %{$typemap(out, const enum SWIGTYPE&)%}
%enddef
%include <std/std_common.i>