Extract string_builder

commit_hash:1573c88f09db79bab2755c9c2c3ffd0bc219b2d2

1 files changed, 30 insertions, 0 deletions

diff --git a/library/cpp/yt/string/string_builder.cpp b/library/cpp/yt/string/string_builder.cpp
new file mode 100644
index 0000000000..bca493fa32
--- /dev/null
+++ b/library/cpp/yt/string/string_builder.cpp
@@ -0,0 +1,30 @@
+#include "string_builder.h"
+
+namespace NYT {
+
+////////////////////////////////////////////////////////////////////////////////
+
+TDelimitedStringBuilderWrapper::TDelimitedStringBuilderWrapper(
+    TStringBuilderBase* builder,
+    TStringBuf delimiter)
+    : Builder_(builder)
+    , Delimiter_(delimiter)
+{ }
+
+TStringBuilderBase* TDelimitedStringBuilderWrapper::operator->()
+{
+    return operator&();
+}
+
+TStringBuilderBase* TDelimitedStringBuilderWrapper::operator&()
+{
+    if (!FirstCall_) {
+        Builder_->AppendString(Delimiter_);
+    }
+    FirstCall_ = false;
+    return Builder_;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT