The complement of true is true, except when it's false
This article explores a C++ standards proposal that introduces bitmask operations for enums using a new annotation. It explains the technical nuances of integral promotion in C++ and how developers can manage type safety when performing bitwise operations.
Why it matters
Understanding low-level language behavior is critical for systems programming and preventing subtle bugs in high-performance software.
I recently looked at P4313R1 , a standards proposal paper which adds a set of bitmask operations for enums, using a C++26 annotation to opt-in. The core idea being that, to use an example from the paper, given code like the below:
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