CODEWITHSUNDEEP
c++xcodepch
andrewz
andrewz

Reputation: 5220

What is the preprocessor define for C++ language in Xcode precompile header?

In my Prefix.pch file I am using __OBJC__ preprocessor define for compilation of Objective C headers. What is the equivalent for compilation of C++ headers?

#ifdef __OBJC__
    #import <Foundation/Foundation.h>
    #import <UIKit/UIKit.h>
#endif

Upvotes: 0

Views: 232

Answers (1)

Mateusz Grzejek
Mateusz Grzejek

Reputation: 12088

There is a standard preprocessor constant, __cplusplus. Its value is expanded to version number of C++ standard being used:

__cplusplus

denotes the version of C++ standard that is being used, expands to value 199711L (until C++11), 201103L (C++11), 201402L (C++14), or 201703L (C++17)

Source: cppreference

So, you can write, for example:

#ifdef __cplusplus
  #if __cplusplus >= 201103L
    // include new stuff
  #else
    // use legacy features
  #endif
#endif

Upvotes: 2

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