clang/test/Modules/namespaces.cpp

   1 // RUN: rm -rf %t
   2 // RUN: %clang_cc1 -x objective-c++ -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs %s -verify
   3
   4 int &global(int);
   5 int &global2(int);
   6
   7 namespace N6 {
   8   char &f(char);
   9 }
  10
  11 namespace N8 { }
  12
  13 namespace LookupBeforeImport {
  14   int &f(int);
  15 }
  16 void testEarly() {
  17   int &r = LookupBeforeImport::f(1);
  18 }
  19
  20 @import namespaces_left;
  21 @import namespaces_right;
  22
  23 void test() {
  24   int &ir1 = N1::f(1);
  25   int &ir2 = N2::f(1);
  26   int &ir3 = N3::f(1);
  27   int &ir4 = global(1);
  28   int &ir5 = ::global2(1);
  29   float &fr1 = N1::f(1.0f);
  30   float &fr2 = N2::f(1.0f);
  31   float &fr3 = global(1.0f);
  32   float &fr4 = ::global2(1.0f);
  33   float &fr5 = LookupBeforeImport::f(1.0f);
  34   double &dr1 = N2::f(1.0);
  35   double &dr2 = N3::f(1.0);
  36   double &dr3 = global(1.0);
  37   double &dr4 = ::global2(1.0);
  38   double &dr5 = LookupBeforeImport::f(1.0);
  39
  40   struct AddAndReexportBeforeImport::S s;
  41   int k = AddAndReexportBeforeImport::S;
  42 }
  43
  44 // Test namespaces merged without a common first declaration.
  45 namespace N5 {
  46   char &f(char);
  47 }
  48
  49 namespace N10 {
  50   int &f(int);
  51 }
  52
  53 void testMerged() {
  54   int &ir1 = N5::f(17);
  55   int &ir2 = N6::f(17);
  56   int &ir3 = N7::f(17);
  57   double &fr1 = N5::f(1.0);
  58   double &fr2 = N6::f(1.0);
  59   double &fr3 = N7::f(1.0);
  60   char &cr1 = N5::f('a');
  61   char &cr2 = N6::f('b');
  62 }
  63
  64 // Test merging of declarations within namespaces that themselves were
  65 // merged without a common first declaration.
  66 void testMergedMerged() {
  67   int &ir1 = N8::f(17);
  68   int &ir2 = N9::f(17);
  69   int &ir3 = N10::f(17);
  70 }
  71
  72 // Test merging when using anonymous namespaces, which does not
  73 // actually perform any merging.
  74 void testAnonymousNotMerged() {
  75   N11::consumeFoo(N11::getFoo()); // expected-error{{cannot initialize a parameter of type 'Foo *' with an rvalue of type 'Foo *'}}
  76   N12::consumeFoo(N12::getFoo()); // expected-error{{cannot initialize a parameter of type 'Foo *' with an rvalue of type 'Foo *'}}
  77 }
  78
  79 // expected-note@Inputs/namespaces-right.h:60 {{passing argument to parameter here}}
  80 // expected-note@Inputs/namespaces-right.h:67 {{passing argument to parameter here}}
  81 // expected-note@Inputs/namespaces-left.h:63 {{'N11::(anonymous namespace)::Foo' is not defined, but forward declared here; conversion would be valid if it was derived from 'N11::(anonymous namespace)::Foo'}}
  82 // expected-note@Inputs/namespaces-left.h:70 {{'N12::(anonymous namespace)::Foo' is not defined, but forward declared here; conversion would be valid if it was derived from 'N12::(anonymous namespace)::Foo'}}
  83 // Test that bringing in one name from an overload set does not hide the rest.
  84 void testPartialImportOfOverloadSet() {
  85   void (*p)() = N13::p;
  86   p();
  87   N13::f(0);
  88 }