clang/test/Modules/merge-using-decls.cpp

   1 // RUN: rm -rf %t
   2 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify %s -DORDER=1
   3 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++98 %s -DORDER=1
   4 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++11 %s -DORDER=1
   5 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++17 %s -DORDER=1
   6 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify %s -DORDER=2
   7 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++98 %s -DORDER=2
   8 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++11 %s -DORDER=2
   9 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x c++ -I%S/Inputs/merge-using-decls -verify -std=c++17 %s -DORDER=2
  10
  11 #if ORDER == 1
  12 #include "a.h"
  13 #include "b.h"
  14 #else
  15 #include "b.h"
  16 #include "a.h"
  17 #endif
  18
  19 struct Y {
  20   int value; // expected-note 0-1{{target of using}}
  21   typedef int type; // expected-note 0-1{{target of using}}
  22 };
  23
  24 template<typename T> int Use() {
  25   int k = T().v + T().value; // expected-note 0-2{{instantiation of}}
  26   typedef typename T::type I;
  27   typedef typename T::t I;
  28   typedef int I;
  29   return k;
  30 }
  31
  32 template<typename T> int UseAll() {
  33 #if __cplusplus <= 199711L // C++11 does not allow access declarations
  34   return Use<C<T> >() + Use<D<T> >() + Use<E<T> >() + Use<F<T> >(); // expected-note 0-2{{instantiation of}}
  35 #else
  36   return Use<C<T> >() + Use<D<T> >() + Use<F<T> >(); // expected-note 0-2{{instantiation of}}
  37 #endif
  38 }
  39
  40 template int UseAll<YA>();
  41 template int UseAll<YB>();
  42 template int UseAll<Y>();
  43
  44 #if __cplusplus >= 201702L
  45 void use_g(Q q) {
  46   q.f(q); // expected-error {{ambiguous}}
  47 #if ORDER == 1
  48   // expected-note@a.h:* {{candidate function}}
  49   // expected-note@a.h:* {{candidate function}}
  50 #else
  51   // expected-note@b.h:* {{candidate function}}
  52   // expected-note@b.h:* {{candidate function}}
  53 #endif
  54 }
  55 #endif
  56
  57 // Which of these two sets of diagnostics is chosen is not important. It's OK
  58 // if this varies with ORDER, but it must be consistent across runs.
  59 #if ORDER == 1
  60 // Here, we're instantiating the definition from 'A' and merging the definition
  61 // from 'B' into it.
  62
  63 #if __cplusplus <= 199711L // C++11 does not allow access declarations
  64 // expected-error@b.h:* {{'E::value' from module 'B' is not present in definition of 'E<T>' in module 'A'}}
  65 // expected-error@b.h:* {{'E::v' from module 'B' is not present in definition of 'E<T>' in module 'A'}}
  66 #endif
  67
  68 // expected-error@b.h:* {{'F::type' from module 'B' is not present in definition of 'F<T>' in module 'A'}}
  69 // expected-error@b.h:* {{'F::t' from module 'B' is not present in definition of 'F<T>' in module 'A'}}
  70 // expected-error@b.h:* {{'F::value' from module 'B' is not present in definition of 'F<T>' in module 'A'}}
  71 // expected-error@b.h:* {{'F::v' from module 'B' is not present in definition of 'F<T>' in module 'A'}}
  72
  73 // expected-note@a.h:* +{{does not match}}
  74 #else
  75 // Here, we're instantiating the definition from 'B' and merging the definition
  76 // from 'A' into it.
  77
  78 // expected-error@a.h:* {{'D::type' from module 'A' is not present in definition of 'D<T>' in module 'B'}}
  79 // expected-error@a.h:* {{'D::value' from module 'A' is not present in definition of 'D<T>' in module 'B'}}
  80 // expected-error@b.h:* 2{{'typename' keyword used on a non-type}}
  81 // expected-error@b.h:* 2{{dependent using declaration resolved to type without 'typename'}}
  82
  83 #if __cplusplus <= 199711L // C++11 does not allow access declarations
  84 // expected-error@a.h:* {{'E::type' from module 'A' is not present in definition of 'E<T>' in module 'B'}}
  85 // expected-error@a.h:* {{'E::t' from module 'A' is not present in definition of 'E<T>' in module 'B'}}
  86 // expected-error@a.h:* {{'E::value' from module 'A' is not present in definition of 'E<T>' in module 'B'}}
  87 // expected-error@a.h:* {{'E::v' from module 'A' is not present in definition of 'E<T>' in module 'B'}}
  88 // expected-note@b.h:* 2{{definition has no member}}
  89 #endif
  90
  91
  92 // expected-error@a.h:* {{'F::type' from module 'A' is not present in definition of 'F<T>' in module 'B'}}
  93 // expected-error@a.h:* {{'F::t' from module 'A' is not present in definition of 'F<T>' in module 'B'}}
  94 // expected-error@a.h:* {{'F::value' from module 'A' is not present in definition of 'F<T>' in module 'B'}}
  95 // expected-error@a.h:* {{'F::v' from module 'A' is not present in definition of 'F<T>' in module 'B'}}
  96
  97 // expected-note@b.h:* +{{does not match}}
  98 // expected-note@b.h:* +{{target of using}}
  99 #endif