function objects to capture lambda functions in C++

[Yuan_Tang]

Hi,

as you know, lambda function in C++ could be captured by 2 options:

1) auto keyword

2) function object such as following:

#include 
using namespace std;
   function f2 = [] (int x, int y) { return x + y; };
But when I compile this code with icc-12(beta), it will complain:

tb_pochoir.hpp(62): error: function is not a template

function f2;
^
Would you tell me why? and how to fix this problem?

Thanks!

-Yuan

[Brandon_H_Intel]

Which version of Visual Studio* are you using? The problem might be in the Microsoft STL support. This works for me with the Intel compiler integrated with Visual Studio 2010*.

[Yuan_Tang]

Brandon,

I'm using icc-12 (beta) version under linux. So, there's no visual studio. Just icc.

Would you give me some idea how to fix this problem?

Thanks!

-(\x.x x) (\x.x x)

[Brandon_H_Intel]

Hi Yuan,

We don't support variadic templates yet in the compiler. I've linked this thread to an open request for that support, and when I have any more news, I will update this thread. Unfortunately, there's no workarounds at this point to get this to work without that support.

[Brandon_H_Intel]

I've just created a knowledge base article on this issue at http://software.intel.com/en-us/articles/some-gcc-headers-will-not-compile-due-to-use-of-c0x-variadic-templates/.

[Brandon_H_Intel]

This problem is resolved in the version 12.1 compiler available in Intel C++ Composer XE 2011 update 6 and above.