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