c++11 keywords recognition in eclipse in Ubuntu

I am using Eclipse Mars with the GCC compiler in Ubuntu 14.04. I have enabled C++11 options in the compiler settings.

The problem is I use a lot of new c++11 features like Lambda, tuple, shared_ptr, etc. The code is absolutely error-free, but eclipse doesn't recognize them, So there are a lot of errors in the Problems window.

Let me know if there are ways to include these new changes to the editor content assist or any other solution.