cpp changes for latebound schema manipulation from Python

src/ifcparse/IfcBaseClass.h

@@ -74,6 +74,18 @@ namespace IfcUtil {
 		}
 	};
 
+	class IFC_PARSE_API IfcLateBoundEntity : public IfcBaseClass {
+	private:
+		const IfcParse::declaration* decl_;
+
+	public:
+		IfcLateBoundEntity(const IfcParse::declaration* decl, IfcEntityInstanceData* data) : IfcBaseClass(data), decl_(decl) {}
+
+		virtual const IfcParse::declaration& declaration() const {
+			return *decl_;
+		}
+	};
+
 	class IFC_PARSE_API IfcBaseEntity : public IfcBaseClass {
 	public:
 		IfcBaseEntity() : IfcBaseClass() {}

src/ifcparse/IfcSchema.cpp

@@ -1,4 +1,5 @@
 #include "IfcSchema.h"
+#include "../ifcparse/IfcBaseClass.h"
 
 #include <map>
 
@@ -62,6 +63,19 @@ IfcParse::schema_definition::~schema_definition() {
 	}
 }
 
+IfcUtil::IfcBaseClass* IfcParse::schema_definition::instantiate(IfcEntityInstanceData * data) const {
+	if (factory_) {
+		return (*factory_)(data);
+	} else {
+		return new IfcUtil::IfcLateBoundEntity(data->type(), data);
+	}
+}
+
+void IfcParse::register_schema(schema_definition* s) {
+	schemas.insert({ s->name(), s });
+}
+
+
 #include "../ifcparse/Ifc2x3.h"
 #include "../ifcparse/Ifc4.h"
 #include "../ifcparse/Ifc4x1.h"

src/ifcparse/IfcSchema.h

@@ -443,10 +443,12 @@ namespace IfcParse {
 
 		const std::string& name() const { return name_; }
 
-		IfcUtil::IfcBaseClass* instantiate(IfcEntityInstanceData* data) const { return (*factory_)(data); }
+		IfcUtil::IfcBaseClass* instantiate(IfcEntityInstanceData* data) const;
 	};
 
 	const schema_definition* schema_by_name(const std::string&);
+
+	void register_schema(schema_definition*);
 }
 
 #endif