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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s
      2 // expected-no-diagnostics
      3 
      4 // This is basically paraphrased from the standard.
      5 
      6 namespace Root {
      7   int i = 0;
      8   void f();
      9 }
     10 
     11 namespace A {
     12   using namespace Root;
     13 }
     14 
     15 namespace B {
     16   using namespace Root;
     17 }
     18 
     19 namespace AB {
     20   using namespace A;
     21   using namespace B;
     22 }
     23 
     24 void test() {
     25   if (AB::i)
     26     AB::f();
     27 }
     28 
     29 namespace C {
     30   using Root::i;
     31   using Root::f;
     32 }
     33 
     34 namespace AC {
     35   using namespace A;
     36   using namespace C;
     37 }
     38 
     39 void test2() {
     40   if (AC::i)
     41     AC::f();
     42 }
     43