Pass around non-static logger instances and programmatic access to messages in-memory

src/ifcgeom/function_item_evaluator.h

@@ -23,7 +23,7 @@ static taxonomy::function_item::ptr convert_loop_to_function_item(taxonomy::loop
 
 /// @brief Abstract class for evaluating a function_item. This class is specialized for each of the function_item types.
 struct IFC_GEOM_API fn_evaluator {
-    fn_evaluator(const ifcopenshell::geometry::Settings& settings) : settings_(settings) {
+    fn_evaluator(const ifcopenshell::geometry::Settings& settings, Logger& logger = Logger::Root()) : settings_(settings), logger_(logger) {
     }
     fn_evaluator(const fn_evaluator& other) = default;
     virtual ~fn_evaluator() = default;
@@ -36,12 +36,15 @@ struct IFC_GEOM_API fn_evaluator {
     double length() const { return end() - start(); }
 
     ifcopenshell::geometry::Settings settings_;
+
+  protected:
+    Logger& logger_;
 };
 
 /// @brief utility class to evaluate function_item objects.
 class IFC_GEOM_API function_item_evaluator {
   public:
-    function_item_evaluator(const ifcopenshell::geometry::Settings& settings, taxonomy::function_item::const_ptr fn);
+    function_item_evaluator(const ifcopenshell::geometry::Settings& settings, taxonomy::function_item::const_ptr fn, Logger& logger = Logger::Root());
     function_item_evaluator(const function_item_evaluator& other);
     ~function_item_evaluator();
 
@@ -77,6 +80,7 @@ class IFC_GEOM_API function_item_evaluator {
     fn_evaluator* fn_evaluator_ = nullptr;
 
     mutable boost::optional<std::vector<double>> eval_points_; // cache evaluation points
+    Logger& logger_;
 };
 
 }}