title: What macro does Clang define to announce C++11 mode, if any?
body: <p>What macro does Clang define to announce C++11 mode, if any?</p>
  
  <p>GCC defines <code>__GXX_EXPERIMENTAL_CXX0X__</code>, at least some versions do. MSVC seems to have the support turned on by default at least for <code>_MSC_VER &gt;= 1600</code>. </p>