intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 48 insertions, 0 deletions

diff --git a/library/cpp/logger/element.h b/library/cpp/logger/element.h
new file mode 100644
index 0000000000..fc9bff851f
--- /dev/null
+++ b/library/cpp/logger/element.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include "priority.h"
+
+#include <util/stream/tempbuf.h>
+
+class TLog;
+
+/*
+ * better do not use directly
+ */
+class TLogElement: public TTempBufOutput {
+public:
+    TLogElement(const TLog* parent);
+    TLogElement(const TLog* parent, ELogPriority priority);
+
+    TLogElement(TLogElement&&) noexcept = default;
+    TLogElement& operator=(TLogElement&&) noexcept = default;
+
+    ~TLogElement() override;
+
+    template <class T>
+    inline TLogElement& operator<<(const T& t) {
+        static_cast<IOutputStream&>(*this) << t;
+
+        return *this;
+    }
+
+    /*
+         * for pretty usage: logger << TLOG_ERROR << "Error description";
+         */
+    inline TLogElement& operator<<(ELogPriority priority) {
+        Flush();
+        Priority_ = priority;
+        return *this;
+    }
+
+    ELogPriority Priority() const noexcept {
+        return Priority_;
+    }
+
+protected:
+    void DoFlush() override;
+
+protected:
+    const TLog* Parent_;
+    ELogPriority Priority_;
+};