Finishing the first opcode

sources/Exceptions/InvalidOpcode.hpp

@@ -0,0 +1,28 @@
+//
+// Created by anonymus-raccoon on 1/30/20.
+//
+
+#ifndef COMSQUARE_INVALIDACTION_HPP
+#define COMSQUARE_INVALIDACTION_HPP
+
+#include <exception>
+#include <string>
+#include <ios>
+
+namespace ComSquare
+{
+	//! @brief Exception thrown when someone tries to load an invalid rom.
+	class InvalidOpcode : std::exception {
+	private:
+		std::string _msg;
+	public:
+		explicit InvalidOpcode(const std::string &pu, unsigned opcode)
+		{
+			std::stringstream stream;
+			stream << "The " + pu + ": 0x" << std::hex << opcode;
+			this->_msg = stream.str();
+		}
+		const char *what() const noexcept override { return this->_msg.c_str(); }
+	};
+}
+#endif //COMSQUARE_INVALIDACTION_HPP