clang/test/CXX/basic/basic.lookup/basic.lookup.qual/namespace.qual/p2.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
   4
   5 namespace Ints {
   6   int zero = 0; // expected-note {{candidate found by name lookup is 'Ints::zero'}}
   7   void f(int); // expected-note 3 {{candidate function}}
   8   void g(int);
   9 }
  10
  11 namespace Floats {
  12   float zero = 0.0f; // expected-note {{candidate found by name lookup is 'Floats::zero'}}
  13   void f(float); // expected-note 3 {{candidate function}}
  14   void g(float);
  15 }
  16
  17 namespace Numbers {
  18   using namespace Ints;
  19   using namespace Floats;
  20 }
  21
  22 void test() {
  23   int i = Ints::zero;
  24   Ints::f(i);
  25
  26   float f = Floats::zero;
  27   Floats::f(f);
  28
  29   double n = Numbers::zero; // expected-error {{reference to 'zero' is ambiguous}}
  30   Numbers::f(n); // expected-error{{call to 'f' is ambiguous}}
  31   Numbers::f(i);
  32   Numbers::f(f);
  33 }
  34
  35 namespace Numbers {
  36   struct Number { // expected-note 2 {{candidate constructor (the implicit copy constructor) not viable}}
  37 #if __cplusplus >= 201103L // C++11 or later
  38   // expected-note@-2 2 {{candidate constructor (the implicit move constructor) not viable}}
  39 #endif
  40
  41     explicit Number(double d) : d(d) {} // expected-note 2{{explicit constructor is not a candidate}}
  42     double d;
  43   };
  44   Number zero(0.0f);
  45   void g(Number); // expected-note 2{{passing argument to parameter here}}
  46 }
  47
  48 void test2() {
  49   Numbers::Number n = Numbers::zero;
  50   Numbers::f(n); // expected-error {{no matching function for call to 'f'}}
  51   Numbers::g(n);
  52 }
  53
  54 namespace Numbers2 {
  55   using Numbers::f;
  56   using Numbers::g;
  57 }
  58
  59 void test3() {
  60   Numbers::Number n = Numbers::zero;
  61   Numbers2::f(n); // expected-error {{no matching function for call to 'f'}}
  62   Numbers2::g(n);
  63
  64   int i = Ints::zero;
  65   Numbers2::f(i);
  66   Numbers2::g(i); // expected-error {{no viable conversion from 'int' to 'Number'}}
  67
  68   float f = Floats::zero;
  69   Numbers2::f(f);
  70   Numbers2::g(f); // expected-error {{no viable conversion from 'float' to 'Number'}}
  71 }
  72
  73 namespace inline_ns {
  74   int x; // expected-note 2{{found}}
  75   inline namespace A {
  76 #if __cplusplus <= 199711L // C++03 or earlier
  77   // expected-warning@-2 {{inline namespaces are a C++11 feature}}
  78 #endif
  79
  80     int x; // expected-note 2{{found}}
  81     int y; // expected-note 2{{found}}
  82   }
  83   int y; // expected-note 2{{found}}
  84   int k1 = x + y; // expected-error 2{{ambiguous}}
  85   int k2 = inline_ns::x + inline_ns::y; // expected-error 2{{ambiguous}}
  86 }