clang/test/Modules/using-directive.cpp

   1 // RUN: %clang_cc1 -fmodules -fmodules-local-submodule-visibility -fno-modules-error-recovery -fno-spell-checking -verify %s
   2
   3 #pragma clang module build a
   4 module a { explicit module b {} explicit module c {} }
   5 #pragma clang module contents
   6
   7 #pragma clang module begin a.b
   8 namespace b { int n; }
   9 #pragma clang module end
  10
  11 #pragma clang module begin a.c
  12 #pragma clang module import a.b
  13 namespace c { using namespace b; }
  14 #pragma clang module end
  15
  16 #pragma clang module begin a
  17 #pragma clang module import a.c
  18 using namespace c;
  19 #pragma clang module end
  20
  21 #pragma clang module endbuild
  22
  23 #pragma clang module import a.b
  24 void use1() {
  25   (void)n; // expected-error {{use of undeclared identifier}}
  26   (void)::n; // expected-error {{no member named 'n' in the global namespace}}
  27   (void)b::n;
  28 }
  29 namespace b {
  30   void use1_in_b() { (void)n; }
  31 }
  32 namespace c {
  33   void use1_in_c() { (void)n; } // expected-error {{use of undeclared identifier}}
  34 }
  35
  36 #pragma clang module import a.c
  37 void use2() {
  38   (void)n; // expected-error {{use of undeclared identifier}}
  39   (void)::n; // expected-error {{no member named 'n' in the global namespace}}
  40   (void)b::n;
  41   (void)c::n;
  42 }
  43 namespace b {
  44   void use2_in_b() { (void)n; }
  45 }
  46 namespace c {
  47   void use2_in_c() { (void)n; }
  48 }
  49
  50 #pragma clang module import a
  51 void use3() {
  52   (void)n;
  53   (void)::n;
  54   (void)b::n;
  55   (void)c::n;
  56 }
  57 namespace b {
  58   void use3_in_b() { (void)n; }
  59 }
  60 namespace c {
  61   void use3_in_c() { (void)n; }
  62 }