#include <operation_log.h>

template <class HDS>
class Sphere_3_TessalationBuilder : public CGAL::Modifier_base<HDS>
{
private:
    OPERATION_LOG_CODE(
        // This code gets compiled only when logging is compiled in:
        int vertex_count;
    )

    inline void advance_prev_parallel_vertex()
    {
        // Log the function entry:
        OPERATION_LOG_ENTER_NO_ARG_FUNCTION();

        // . . . code . . .

        if (next_vertex_i != prev_parallel_vertex_i)
        {
            // You can construct log messages using std::ostream syntax.
            // You can define formatters for logging values of custom data
            // types.
            OPERATION_LOG_MESSAGE_STREAM(<<
                "Face vertices: " << prev_parallel_vertex_i <<
                ", " << parallel_vertex_i << ", " << next_vertex_i)

            // . . . code . . .
        }
        else
        {
            // You can log an already formatted text message:
            OPERATION_LOG_MESSAGE("Previous parallel has < 2 subdivisions. It's already complete.");
        }

        // . . . code . . .

        // You can log variables by listing their names:
        OPERATION_LOG_DUMP_VARS(prev_parallel_vertex_i, longitude_difference_subdiv);
        // You can explicitly log function exit.  (Otherwise, it will be inferred.)
        OPERATION_LOG_LEAVE_FUNCTION();
    }

    inline void add_vertex(double latitude, double longitude)
    {
        // You can log the parameter values that a function was called with:
        OPERATION_LOG_ENTER_FUNCTION(latitude / M_PI, longitude / M_PI);

        // . . . code . . .

        OPERATION_LOG_MESSAGE_STREAM(<<
            "Vertex " << vertex_count << ": " << point);

        // . . . code . . .

        // You can execute data tracking code only when logging is compiled in:
        OPERATION_LOG_CODE(
            vertex_count++;
        )

        OPERATION_LOG_LEAVE_FUNCTION();
    }
};