Add enum_conv_pair

src/python_bindings/opt_to_py.cpp

@@ -5,26 +5,21 @@ using ConvFunction = std::function<py::object(boost::any)>;
 
 template <typename T>
 std::pair<std::type_index, ConvFunction> normal_conv_pair{
-        std::type_index(typeid(T)),
-        [](boost::any value) { return py::cast(boost::any_cast<T>(value)); }};
+    std::type_index(typeid(T)),
+    [](boost::any value) { return py::cast(boost::any_cast<T>(value)); }
+};
 
 template <>
 std::pair<std::type_index, ConvFunction> normal_conv_pair<bool>{
-        std::type_index(typeid(bool)),
-        [](boost::any value) { return py::cast(boost::any_cast<bool>(value)); }};
+    std::type_index(typeid(bool)),
+    [](boost::any value) { return py::cast(boost::any_cast<bool>(value)); }
+};
 
-template <>
-std::pair<std::type_index, ConvFunction> normal_conv_pair<algos::metric::MetricAlgo>{
-        std::type_index(typeid(algos::metric::MetricAlgo)), [](boost::any value) {
-            auto opt_value = boost::any_cast<algos::metric::MetricAlgo>(value);
-            return py::cast(opt_value._to_string());
-        }};
-template <>
-std::pair<std::type_index, ConvFunction> normal_conv_pair<algos::metric::Metric>{
-        std::type_index(typeid(algos::metric::Metric)), [](boost::any value) {
-            auto opt_value = boost::any_cast<algos::metric::Metric>(value);
-            return py::cast(opt_value._to_string());
-        }};
+template <typename T>
+std::pair<std::type_index, ConvFunction> enum_conv_pair{
+    std::type_index(typeid(T)),
+    [](boost::any value){ return py::cast(boost::any_cast<T>(value)._to_string());}
+};
 const std::unordered_map<std::type_index, ConvFunction> converters{
         normal_conv_pair<int>,
         normal_conv_pair<double>,
@@ -35,8 +30,8 @@ const std::unordered_map<std::type_index, ConvFunction> converters{
         normal_conv_pair<config::MaxLhsType>,
         normal_conv_pair<config::ErrorType>,
         normal_conv_pair<config::IndicesType>,
-        normal_conv_pair<algos::metric::MetricAlgo>,
-        normal_conv_pair<algos::metric::Metric>};
+        enum_conv_pair<algos::metric::MetricAlgo>,
+        enum_conv_pair<algos::metric::Metric>};
 }  // namespace
 
 namespace python_bindings {