Is "for each" Microsoft specific?

Question

Visual C++ 2010 accepts:

std::vector<int> v;
v.push_back(1);
v.push_back(2);
v.push_back(3);
for each (auto i in v)
    std::cout << i << std::endl;

Is this a C++0x feature or a Microsoft extension? According to Wikipedia, the syntax of C++0x's for-each loop different:

int myint[] = {1,2,3,4,5};
for (int& i: myint)
{
    std::cout << i;
}

Answer 1

The current standard draft does not include the for each ( auto i in v ) syntax, only the for ( auto i : myints ), so yes, it is just an extension.

Answer 2

Besides of the for loops version presented above a c++0x standard conformal version would also be:

std::for_each (v.begin(), v.end(), [] (int)->void { 
    std::cout << i << std::endl;
});

The construct you have presented, is also standard conformal, but it conforms to different standard: The ECMA C++/CLI specification.

Answer 3

In VS2010, for any such doubt, try with the /Za flag under "C/C++->Language" in the IDE project settings.

As for your query, yes, this is not standard C++ syntax.