intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 39 insertions, 0 deletions

diff --git a/util/string/builder.h b/util/string/builder.h
new file mode 100644
index 0000000000..7b54821151
--- /dev/null
+++ b/util/string/builder.h
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <util/stream/str.h>
+#include <utility>
+#include <util/generic/string.h>
+
+namespace NPrivateStringBuilder {
+    class TStringBuilder: public TString {
+    public:
+        inline TStringBuilder()
+            : Out(*this)
+        {
+        }
+
+        TStringBuilder(TStringBuilder&& rhs)
+            : TString(std::move(rhs))
+            , Out(*this)
+        {
+        }
+
+        TStringOutput Out;
+    };
+
+    template <class T>
+    static inline TStringBuilder& operator<<(TStringBuilder& builder, const T& t) {
+        builder.Out << t;
+
+        return builder;
+    }
+
+    template <class T>
+    static inline TStringBuilder&& operator<<(TStringBuilder&& builder, const T& t) {
+        builder.Out << t;
+
+        return std::move(builder);
+    }
+}
+
+using TStringBuilder = NPrivateStringBuilder::TStringBuilder;