How do I use feature-test macros for C++23?

C++23, feature-test macros, C++ standard, programming, development
Learn how to use feature-test macros in C++23 to check for the availability of new features in the C++ standard.

Feature-test macros in C++23 allow developers to conditionally compile code based on the availability of specific language features and library components. This is particularly useful for ensuring compatibility across different compiler versions and configurations.

To use feature-test macros, you typically include checks like the following in your code:

#include <iostream> #if defined(__cpp_lib_counted_iterator) #include <counted_iterator> #endif int main() { std::cout << "Using C++23 features!" << std::endl; return 0; }

In the example above, the macro `__cpp_lib_counted_iterator` is checked to determine if the feature is available before including the corresponding header. This way, your code remains portable and adapts to the available features in the compiler being used.


C++23 feature-test macros C++ standard programming development

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