MNT: expose internal helper isiterable

Move it to srreal_validators.cpp.

Author: pavoljuhas

src/extensions/srreal_converters.cpp

@@ -31,6 +31,7 @@
 #include <diffpy/srreal/StructureAdapter.hpp>
 
 #include "srreal_converters.hpp"
+#include "srreal_validators.hpp"
 
 #include "srreal_numpy_symbol.hpp"
 // numpy/arrayobject.h needs to be included after srreal_numpy_symbol.hpp,
@@ -73,19 +74,6 @@ boost::python::object newNumPyArray(int dim, const int* sz, int typenum)
     return rv;
 }
 
-
-bool isiterable(boost::python::object obj)
-{
-    using namespace boost::python;
-#if PY_MAJOR_VERSION >= 3
-    object Iterable = import("collections.abc").attr("Iterable");
-#else
-    object Iterable = import("collections").attr("Iterable");
-#endif
-    bool rv = (1 == PyObject_IsInstance(obj.ptr(), Iterable.ptr()));
-    return rv;
-}
-
 }   // namespace
 
 namespace srrealmodule {

src/extensions/srreal_validators.cpp

@@ -17,6 +17,7 @@
 *****************************************************************************/
 
 #include <boost/python/errors.hpp>
+#include <boost/python/import.hpp>
 
 #include "srreal_validators.hpp"
 
@@ -43,6 +44,19 @@ void ensure_non_negative(int value)
     }
 }
 
+
+bool isiterable(boost::python::object obj)
+{
+    using boost::python::import;
+#if PY_MAJOR_VERSION >= 3
+    object Iterable = import("collections.abc").attr("Iterable");
+#else
+    object Iterable = import("collections").attr("Iterable");
+#endif
+    bool rv = (1 == PyObject_IsInstance(obj.ptr(), Iterable.ptr()));
+    return rv;
+}
+
 }   // namespace srrealmodule
 
 // End of file

src/extensions/srreal_validators.hpp

@@ -23,6 +23,7 @@ namespace srrealmodule {
 
 void ensure_index_bounds(int idx, int lo, int hi);
 void ensure_non_negative(int value);
+bool isiterable(boost::python::object obj);
 
 }   // namespace srrealmodule