Base: [skip ci] support of __round__ of QuantityPy

src/Base/QuantityPy.xml

@@ -48,6 +48,14 @@ Quantity(string) -- arbitrary mixture of numbers and chars defining a Quantity
         </UserDocu>
       </Documentation>
     </Methode>
+    <Methode Name="__round__" Const="true">
+      <Documentation>
+        <UserDocu>
+Return the Integral closest to x, rounding half toward even.
+When an argument is passed, work like built-in round(x, ndigits).
+        </UserDocu>
+      </Documentation>
+    </Methode>
     <Attribute Name="Value" ReadOnly="false">
 			<Documentation>
 				<UserDocu>Numeric Value of the Quantity (in internal system mm,kg,s)</UserDocu>

src/Base/QuantityPyImp.cpp

@@ -205,6 +205,17 @@ PyObject* QuantityPy::getValueAs(PyObject *args)
     return new QuantityPy(new Quantity(quant));
 }
 
+PyObject * QuantityPy::__round__ (PyObject *args)
+{
+    double val= getQuantityPtr()->getValue();
+    Unit unit = getQuantityPtr()->getUnit();
+    Py::Float flt(val);
+    Py::Callable func(flt.getAttr("__round__"));
+    double rnd = static_cast<double>(Py::Float(func.apply(args)));
+
+    return new QuantityPy(new Quantity(rnd, unit));
+}
+
 PyObject * QuantityPy::number_float_handler (PyObject *self)
 {
     if (!PyObject_TypeCheck(self, &(QuantityPy::Type))) {