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nielsp
nielsp
Last Activity: Aug 1 '09, 08:13 AM
Joined: Jul 19 '09
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  • nielsp
    replied to iterate over tuple
    in C
    Hi!

    I understood the mistakes I made. The Listener-related error has nothing to do with the problem, that the symbol does'nt exists, I just wanted to simplify the code in order to make it easer to read, so I renamed Listener to T, but the error exists although (cannot expand 'T' ... instead of cannot expand 'Listener') .
    I got some helpful answers at stackoverflow.c om, so here is the version that works:
    Code:
    template<class
    ...
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    • nielsp
      replied to iterate over tuple
      in C
      Is it impossible or what?
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      • nielsp
        replied to iterate over tuple
        in C
        The document does not say anything about iterating over tuples. By the way, I am using tuples of C++0x. Although those tuples are probably derived from the boost library, it might be not absolutly the same.

        Niels.
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        • nielsp
          started a topic iterate over tuple
          in C

          iterate over tuple

          Hello!

          How can I iterate over a tuple (using C++0x)? I tried the following, but that doesn't work:
          Code:
          for(int i=0; i<std::tuple_size<T...>::value; ++i) 
    std::get<i>(my_tuple).do_sth();
          Error 1: sorry, unimplemented: cannot expand ‘Listener ...’ into a fixed-length argument list.
          Error 2: i cannot appear in a constant expression.

          So, how do I correctly...
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          • nielsp
            replied to invalid use of nonstatic member
            in C
            Is there a way to access m although?

            Niels
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            • nielsp
              started a topic invalid use of nonstatic member
              in C

              invalid use of nonstatic member

              Hi!

              Why does'nt the following work?

              Code:
              #include <iostream>

class X
{
public:
	X()
	 : m(0)
	{ }
	
	virtual ~X()
	{ }
	
protected:
	int m;
};

class Y : public X
{
private:
	class Z 
	{
		void do_something() 
		{
			std::cout << m << std::endl;
              ...
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