__cplusplus in Visual Studio 2012
In Visual Studio 2012, some developers have noticed that __cplusplus is defined as 199711L, indicating the "old" C standard, despite the fact that VS 2012 includes C 11 support.
Background
The __cplusplus macro is a preprocessor macro that provides the version of the supported C standard in Visual Studio. A value of 199711L corresponds to the C 98 standard, while 201103L would indicate C 11 support.
Issue
In Visual Studio 2012, even if C 11 headers are included, __cplusplus is still incorrectly defined as 199711L. This can be problematic for code that relies on the __cplusplus macro to differentiate between versions of the C standard.
Resolution
The issue has been reported to Microsoft for review, and appears under the title "A value of predefined macro __cplusplus is still 199711L."
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