Move Print object storage to C++. (along with its subobjects)

xs/src/PlaceholderParser.hpp

@@ -0,0 +1,24 @@
+#ifndef slic3r_PlaceholderParser_hpp_
+#define slic3r_PlaceholderParser_hpp_
+
+
+#include <myinit.h>
+#include <map>
+#include <string>
+
+
+namespace Slic3r {
+
+class PlaceholderParser
+{
+    public:
+    std::map<std::string, std::string> _single;
+    std::map<std::string, std::string> _multiple;
+
+    PlaceholderParser();
+    ~PlaceholderParser();
+};
+
+}
+
+#endif