constexpr 未在 VC2013 中编译

Is there a newer Visual Studio compiler that works with constexpr?

#include <iostream>

constexpr int factorial(int n)
{
    return n <= 1 ? 1 : (n * factorial(n - 1));
}

int main(void)
{
    const int fact_three = factorial(3);
    std::cout << fact_three << std::endl;
    return 0;
}

编译输出:

    1>------ Build started: Project: Project1, Configuration: Debug Win32 ------
    1>  Source.cpp
    1>....source.cpp(3): error C2144: syntax error : 'int' should be preceded by ';'
    1>....source.cpp(3): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Herb Sutter 在他的博客上提到了 constexpr，但不清楚它在哪个版本中有效/将有效?http://herbsutter.com/2013/09/09/visual-studio-2013-rc-is-now-available/#comment-13521