intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 32 insertions, 0 deletions

diff --git a/library/cpp/getopt/small/formatted_output.h b/library/cpp/getopt/small/formatted_output.h
new file mode 100644
index 0000000000..6fd16b73f9
--- /dev/null
+++ b/library/cpp/getopt/small/formatted_output.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <util/generic/algorithm.h>
+#include <util/generic/vector.h>
+#include <util/string/builder.h>
+#include <util/memory/tempbuf.h>
+
+namespace NLastGetopt {
+    /// Utility for printing indented lines. Used by completion generators.
+    class TFormattedOutput {
+    public:
+        struct IndentGuard {
+            explicit IndentGuard(TFormattedOutput* output);
+            virtual ~IndentGuard();
+            TFormattedOutput* Output;
+        };
+
+    public:
+        /// Increase indentation and return a RAII object that'll decrease it back automatically.
+        IndentGuard Indent();
+
+        /// Append a new indented line to the stream.
+        TStringBuilder& Line();
+
+        /// Collect all lines into a stream.
+        void Print(IOutputStream& out);
+
+    private:
+        int IndentLevel_ = 0;
+        TVector<std::pair<int, TStringBuilder>> Lines_;
+    };
+}