[dbg] Hide implementations of shared components

base/output_formatter.cc

@@ -8,6 +8,31 @@ using namespace std;
 //----------------------------------------------------------------
 
 namespace {
+	class abstract_formatter : public formatter {
+		typedef boost::optional<std::string> maybe_string;
+
+		void field(std::string const &name, std::string const &value) {
+			fields_.push_back(field_type(name, value));
+		}
+
+		void child(std::string const &name, formatter::ptr t) {
+			children_.push_back(field_type(name, t));
+		}
+
+	protected:
+		typedef boost::variant<std::string, ptr> value;
+		typedef boost::tuple<std::string, value> field_type;
+
+		std::vector<field_type> fields_;
+		std::vector<field_type> children_;
+	};
+
+	class xml_formatter : public abstract_formatter {
+	public:
+		void output(std::ostream &out, int depth = 0,
+			    boost::optional<std::string> name = boost::none);
+	};
+
 	void indent(int depth, std::ostream &out) {
 		for (int i = 0; i < depth * 2; i++)
 			out << ' ';
@@ -51,3 +76,11 @@ void xml_formatter::output(std::ostream &out,
 }
 
 //----------------------------------------------------------------
+
+formatter::ptr
+dbg::create_xml_formatter()
+{
+	return formatter::ptr(new xml_formatter());
+}
+
+//----------------------------------------------------------------