MSVC warning C5260 says namespace-scope constexpr variables should be marked inline or static for C++20 header units.
("warning C5260: the constant variable 'X' has internal linkage in an included header file context, but external linkage in imported header unit context; consider declaring it 'inline' as well if it will be shared across translation units, or 'static' to express intent to use it local to this translation unit").
MSVC warning C5260 says namespace-scope
constexprvariables should be markedinlineorstaticfor C++20 header units. ("warning C5260: the constant variable 'X' has internal linkage in an included header file context, but external linkage in imported header unit context; consider declaring it 'inline' as well if it will be shared across translation units, or 'static' to express intent to use it local to this translation unit").