[SOLVED] C++ - Which compiler do I use to get the auto eq = [ ](...) syntax to work?

C++ - Which compiler do I use to get the auto eq = [ ](...) syntax to work?

I am trying to run the count occurrences of elements in a vector code listed in the answer here.

But I'm running into compile errors in this function:

auto h = [](const std::string* s) {
     return std::hash<std::string>()(*s);
};

stating Expected expression around the [ ]. I know this has to do with the compiler. I'm using Xcode 5.0.2, so I have the option to change the compiler (I think).

Then I'm getting another compile error on the line:

std::unordered_map<const std::string*, size_t, decltype(h), decltype(eq)> m(v.size(), h, eq);

stating C++ requires a specifier for all declarations around the m(v.size(), h, eq) portion.

What compiler should I make sure Xcode is compiling with in order to get this code to work?

Update:

Is there a particular name for this auto = [ ](...) notation that I could google?

Solution

Do you know what standard is taking into account?

Try to force to C++11, to cover these lambda structures and unordered_map.