CODEWITHSUNDEEP
c++namespaces
MrLukashem
MrLukashem

Reputation: 7

Name look-up fails - c++ namespaces

Could you explain why namespace look-up fails in that code?

namespace B {
namespace C {
   int i;
}
}
namespace A {
namespace B {

void foo() {
    // why does not much A::B::C
    B::C::i = 3;   
}
}
}

Yes, I know ::B::C::i works because we indicates global namespace but I am curious why look-up does not search outside B::C namespaces when we don't use :: before B.

Thanks in advance

Upvotes: 0

Views: 33

Answers (1)

eerorika
eerorika

Reputation: 238361

Within the namespace ::A::B, the unqualified lookup for B finds the namespace ::A::B rather than finding the namespace ::B. And there is no name ::A::B::C, so the qualified lookup for C within the found ::A::B fails.

Upvotes: 2

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