Re: [Boost-users] please help : Error: Unexpected type name

From: Bruce Trask (bruce.trask_at_[hidden])
Date: 2008-07-23 01:33:08

 > it's already in the code .

Understood. I am advocating that you fully qualify the _1 at the call 
site as you might be running afoul of a clash with some other _1s.

Sun, Xiuxin wrote:
> HI Bruce ,
> it's already in the code .
>  >     using namespace boost::lambda;
>>     typedef std::istream_iterator<int> in;
>>
>>     std::for_each(
>>         in(std::cin), in(), std::cout << (_1 * 3) << " " ); }
> 
> -----Original Message-----
> From: boost-users-bounces_at_[hidden]
>> HI all,
>> when I try to compile the example code only use boost head-file in
> SunOS :
>> #include <boost/lambda/lambda.hpp>
>> #include <iostream>
>> #include <iterator>
>> #include <algorithm>
>>
>> int main()
>> {
>>     using namespace boost::lambda;
>>     typedef std::istream_iterator<int> in;
>>
>>     std::for_each(
>>         in(std::cin), in(), std::cout << (_1 * 3) << " " ); }
> 
> Try this:
>      typedef std::istream_iterator<int> in;
> 
>      std::for_each(
>          in(std::cin), in(), std::cout << boost::lambda::_1*3 << " " );
> HTH, Bruce