The complement of true is true, except when it's false

Automated excerpt

Your C++ compiler will happily compute bitwise operations for any integral type as a builtin operation. All scoped enum types have a fixed underlying type, even if they don’t specify it (in that case, int); and all unscoped enum types which do specify a fixed underlying type inherit that type’s value range instead of inventing their own. Avoiding this in your own codeLet’s say that, like P4313, you are adding bitmask operations to enums for your own code.

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