fix reserved macro, reorder members, adds virtual destructor

- Adds the class name as a constructor parameter.

README.md

@@ -19,7 +19,7 @@ Example
 #include <iostream>
 #include <iomanip>
 
-#include "exceptions.h" 
+#include <exceptions/exceptions.h>
 
 // Use this macro to build up your hierarchy of exceptions
 EXCEPTION( Exception, Existential_Observation );

example.cpp

@@ -5,7 +5,7 @@
 #include <sstream>
 #include <stdexcept>
 
-#include "exceptions.h" 
+#include "exceptions/exceptions.h" 
 
 // Use this macro to build up your hierarchy of exceptions
 EXCEPTION( Exception, Existential_Observation );

exceptions/exceptions.h

@@ -1,5 +1,6 @@
-#ifndef __EXCEPTIONS_H__
-#define __EXCEPTIONS_H__
+#pragma once
+#ifndef EXCEPTIONS_H
+#define EXCEPTIONS_H
 
 #include <string>
 #include <sstream>
@@ -19,7 +20,7 @@
       EXCEPTION(Exception,Buddhist_Observation);
       creates an new exception class "Buddhist_Observation", derived from the base "Exception"
 */
-#define EXCEPTION(Super,Current) class Current : public Super {public: Current ( const std::string & desc, const std::string & func="?", const std::string & f="?", const int l=-1 ) : Super (desc,func,f,l) {name = #Current;} }
+#define EXCEPTION(Super,Current) class Current : public Super {public: Current ( const std::string & desc, const std::string & func="?", const std::string & f="?", const int l=-1, const std::string & n=#Current ) : Super (desc,func,f,l,n) {} }
 
 
 /** A shortcut to throw an exception without having to type ",E_INFOS"
@@ -35,8 +36,6 @@
 class Exception : public std::exception
 {
 protected:
-    //! Name of the current exception class
-    std::string name;
 
     //! Description of the exception
     std::string description;
@@ -50,6 +49,12 @@ protected:
     //! Line where the exception has been raised
     int line;
 
+    //! Name of the current exception class
+    std::string name;
+
+    //! Assembled message
+    std::string message;
+
 public:
     //! Constructor of the exception
     /*!
@@ -59,21 +64,23 @@ public:
         Use the E_INFOS macro to raise the exception, for example :
             throw( Exception( "Shit evolves", E_INFOS );
     */
-    Exception( const std::string & desc, const std::string & func, const std::string & f, const int l ) 
-        : description(desc), function(func), file(f), line(l) {}
+    Exception( const std::string & desc, const std::string & func, const std::string & f, const int l, const std::string & n = "Exception" )
+        : description(desc), function(func), file(f), line(l), name(n)
+        {
+            std::ostringstream msg;
+            msg << "<" << name << "> " << description << "\t\t" << function << " @ " << file << ":" << line << "";
+            message = msg.str();
+        }
 
     //! The destructor is not allowed to throw exceptions
-    virtual ~Exception() throw () {}
+    virtual ~Exception() noexcept {}
 
     //! The method to use for printing the complete description of the exception
-    std::string what()
+    const char* what() const noexcept
     {
-        std::ostringstream msg;
-        msg << description << " (<" << name << "> in " << function << " at " << file << ":" << line << ")";
-
-        return msg.str();
+        return message.c_str();
     }
 };
 
-#endif // __EXCEPTIONS_H__
+#endif // EXCEPTIONS_H