I’m learning about external linkage in C++ and came across a point in cppreference stating that enum has external linkage. However, I encountered an issue where no linkage conflict occurs when defining the same enum class in different files within the same namespace.

Here are my code snippets:

test1.cpp:

namespace A {
    enum TestEnum{};
}

test2.cpp:

namespace A {
    enum TestEnum{};
}

I expected the compiler to raise a linkage conflict error, but it compiles without any issues. Could someone explain why there’s no conflict despite the enums having external linkage? What am I missing about the linkage of enum types in this context?

Thank you in advance for your help!