list initialization compile error

Question

c++ 11 standard 8.5.4 example for list initializtion say:

std::map<std::string,int> anim = { {"bear",4}, {"cassowary",2}, {"tiger",7} };

But I have tried VC10, gcc 4.6 and Comeau, none of those compiler would let this pass ? Why is that ?

Answer 1

Thanks for all the answers in the comments.

I then checked back the c++ 98 and 03 standard and yea, 8.5.4 is definitely a new second in c++ 11 ! That's why it not being fully supported by all compilers.

After adding flag -std=c++0x with gcc 4.6.1 now this compiles fine.

Adding the testing code for anything who might need a reference:

#include <map>
#include <string>
#include <initializer_list>
#include <iostream>

using namespace std;
int main() 
{
    std::map<std::string,int> collection = {{"bear",4}, {"cassowary",2}, {"tiger",7}};
    for(auto it: collection)
        std::cout << it.first << " has value " << it.second << std::endl;
    return 0;
}