Hi,
I'm rather new to lambdas.
I wanted to use them to stream objects into a special stream (not a stl
stream).
the following code outlines the situation:
----
#include <iostream>
#include <list>
#include <algorithm>
#include
#include
#include
using namespace std;
using namespace boost;
using boost::lambda::_1;
class MyStream
{
public:
MyStream() {}
};
class MySubStream: public MyStream
{
public:
MySubStream(MyStream*) {}
};
MyStream& operator <<(MyStream& os, const int&)
{
return os;
}
int main()
{
list cont;
MyStream osTop;
MySubStream osSub(&osTop);
for_each(cont.begin(), cont.end(), ref(osSub) << *_1);
return 0;
}
----
g++ outputs error:
'/usr/include/boost/lambda/detail/operator_lambda_func_base.hpp:212:
error: conversion from 'MyStream' to non-scalar type 'MySubStream'
requested'.
MS VC 2003.net says:
boost\lambda\detail\operator_lambda_func_base.hpp(212) : error C2664:
'MySubStream::MySubStream(MyStream *)' : cannot convert parameter 1 from
'MyStream' to 'MyStream *'.
The question is whether my code is correct at all and how I could use
lambdas the right way.
Thanks!
Klaus Triendl
