introduce elapsed_logger and more garbage

1 files changed, 32 insertions, 0 deletions

diff --git a/src/utils/elapsed_logger.h b/src/utils/elapsed_logger.h
new file mode 100644
index 0000000..ea0d9e2
--- /dev/null
+++ b/src/utils/elapsed_logger.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <chrono>
+#include <iomanip>
+#include <iostream>
+#include <string>
+
+/*!
+ * \brief The elapsed_logger class - print `message: <own life time>` on destruction
+ */
+template<typename T = std::chrono::microseconds, int W = 8>
+class elapsed_logger
+{
+    using clk = std::chrono::high_resolution_clock;
+
+public:
+    explicit elapsed_logger(const std::string &&message)
+        : m_start{clk::now()}
+        , m_message{std::move(message)}
+    {}
+
+    ~elapsed_logger()
+    {
+        using namespace std::chrono;
+        const auto duration = duration_cast<T>(clk::now() - m_start);
+        std::cout << m_message << ": " << std::setw(W) << duration << std::endl;
+    }
+
+private:
+    const std::chrono::time_point<clk> m_start;
+    const std::string m_message;
+};