🚀 go-pugleaf

I've found in  "The draft standard C++ Library" by PJ Plauger (Prentice Hall,ISBN 0-13-
117003-1, copyright  1995 P.J Plauger) some specification of the Exception class :
	
class exception {
	public:
		typedef void (*raise_handler)(exception&);
		static raise_handler set_raise_handler(raise_handler);
		exception (const char* what_arg=0,
			   const char* where_arg=0,
			   const char* why_arg=0);
		exception (const exception& rhs);
		exception& operator=(const exception& rhs);
		virtual ~exception();
		void raise();
		const char* what() const;
		const char* where() const;
		const char* why() const;
		static void_Throw(exception* rhs);
	
	protected:
		virtual void do_raise();
		exception (const char* what_arg, const char* where_arg,
			    const char* why_arg, _BOOL copyfl);
	
	private:
		void 		_Tidy();
		const char*	_what;
		const char* 	_where;
		const char*	_why;
		_BOOL		_alloced;
		static raise_handler _Handler;
};

But in the "Draft Proposed International Standard for Information Systems Programming
Language C++" (X3J16/95-0087 WG21/N0687 , 28 April 1995) there 's only :

class exception{
	public:
		exception() throw();
		exception& exception(const exception&) throw();
		exception& operator=(const exception&) throw();
		virtual ~exception() throw();
		virtual const char* what() const throw();
};

Is there someone who knows whether the difference comes from a need to simplify this
class?

For instance, there's no more attribute _what, _where, _why, but there's always the what()
accessor, and there are no constructors with a char*.

[ Moderator's note: Plauger's book was written to the March 1994
  version of the draft. Many changes have occurred since then,
  with more library changes yet to come. -sdc ]
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