boost.lambda for_each and boost.array
Hi,
these snipped doesn't compile, but why?
---8<---
#include <iostream>
#include
On Mon, Apr 7, 2008 at 2:06 PM, Olaf Peter
for_each( values.begin(), values.end(), std::cout << _1 << '\n');
error: 'for_each' was not declared in this scope
You never included <algorithm>, and it's std::for_each anyways.
using std::list compiles and works. Did I miss something?
That's a fluke. One of the headers (perhaps <list>) happens to include <algorithm>, and using std::list means that std::for_each gets found by ADL. Neither are good style, and the first is non-conforming if <algorithm> came indirectly from a standard header.
Thanks for all answers,
for_each( values.begin(), values.end(), std::cout << _1 << '\n');
error: 'for_each' was not declared in this scope
You never included <algorithm>, and it's std::for_each anyways.
using std::list compiles and works. Did I miss something?
That's a fluke. One of the headers (perhaps <list>) happens to include <algorithm>, and using std::list means that std::for_each gets found by ADL. Neither are good style, and the first is non-conforming if <algorithm> came indirectly from a standard header.
that's is what did confuse me. The boost.lambda header has a for_each struct/class calling std::for_each in boost/lambda/algorithm.hpp. Thanks, Olaf
participants (3)
-
Olaf Peter -
Peter Dimov -
Scott McMurray