How do you determine what version of the C++ standard is implemented by your compiler? As far as I know, below are the standards I've known:
- C++03
- C++98
views:
128answers:
4Whether `__STDC__` is defined, and what its value is, are implementation-defined in C++.
Rob Kennedy
2010-02-24 08:57:31
@Rob: Yes, it is.@Tor: I tried in VC++ 2005 but it says __STDC__ is an undeclared identifier. It is listed as one of those pre-defined macros though. However, __STDC_VERSION__ does not exist.
jasonline
2010-02-24 09:04:00
+3
A:
By my knowledge there is no overall way to do this. If you look at the headers of cross platform/multiple compiler supporting libraries you'll always find a lot of defines that use compiler specific constructs to determine such things:
/*Define Microsoft Visual C++ .NET (32-bit) compiler */
#if (defined(_M_IX86) && defined(_MSC_VER) && (_MSC_VER >= 1300)
...
#endif
/*Define Borland 5.0 C++ (16-bit) compiler */
#if defined(__BORLANDC__) && !defined(__WIN32__)
...
#endif
You probably will have to do such defines yourself for all compilers you use.
RED SOFT ADAIR
2010-02-24 09:23:46
Not my expected answer though but I guess there's just no universal way of finding it out.
jasonline
2010-02-28 11:26:32
+3
A:
Depending on what you want to achieve, Boost.Config might help you. It does not provide detection of the standard-version, but it provides macros that let you check for support of specific language/compiler-features.
Space_C0wb0y
2010-02-24 09:35:02
Checking for features is probably a better idea than checking standard versions, anyway. Few compilers support *everything* from a standard, but if they all support the limited number of features you need, then it doesn't really matter whether the rest of the features from a given standard are implemented and working correctly.
Rob Kennedy
2010-02-24 10:36:01
A:
__cplusplus
In C++0x the macro __cplusplus will be set to a value that differs from (is greater than) the current 199711L.
Vinzenz
2010-02-24 09:48:58