First commit.

src/PiPedalException.hpp

@@ -0,0 +1,51 @@
+#pragma once
+#include <exception>
+
+namespace pipedal
+{
+
+    class PiPedalException : public std::exception
+    {
+        std::string what_;
+
+    public:
+        PiPedalException(const std::string &what)
+            : std::exception(), what_(what)
+        {
+        }
+        virtual ~PiPedalException() { 
+
+        }
+        virtual const char *what() const noexcept { return what_.c_str(); }
+    };
+
+    class PiPedalArgumentException : public PiPedalException
+    {
+    public:
+        PiPedalArgumentException()
+            : PiPedalException("Invalid argument")
+        {
+        }
+        PiPedalArgumentException(std::string &&what)
+            : PiPedalException(std::forward<std::string>(what))
+        {
+        }
+    };
+    class PiPedalStateException : public PiPedalException
+    {
+    public:
+        PiPedalStateException(std::string &&what)
+            : PiPedalException(std::forward<std::string>(what))
+        {
+        }
+    };
+    class PiPedalLogicException : public PiPedalException
+    {
+    public:
+        PiPedalLogicException(const char *what)
+            : PiPedalException(what)
+        {
+        }
+    };
+
+} // namespace