Easily Find Feature Test Macros with the <version> Header
Learn to find feature test macros with the <version> header.
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C++ has provided some form of feature test macros for as long as new features have been added. Beginning with C++20, the process is standardized, and all library feature test macros have been added to the <version> header. This will make it much easier to test for a new feature in our code.
This is a useful feature and it's very simple to use.