I’m trying to bring a function into consideration with a using declaration:

namespace n {
    struct S {};
    bool equal(S a, S b, std::vector<int> = {1,2}) { return false; }
}
int main() {
    using ::n::equal;
    using ::n::S;
    /// ...
}

This works well as long as no std::initializer_list is passed as the third argument

equal(S{},S{});
equal(S{},S{},{1});

but breaks when a std::initializer_list is passed as the third argument

equal(S{},S{},std::initializer_list<int> {1, 2});

and only considers std::equal.

I struggle to understand the reason why this is not working and to find a solution to enable this pattern.

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