clang/test/Modules/cxx20-10-2-ex2.cpp

   1 // Based on C++20 10.2 example 2.
   2
   3 // RUN: rm -rf %t
   4 // RUN: mkdir -p %t
   5 // RUN: split-file %s %t
   6
   7 // RUN: %clang_cc1 -std=c++20 -emit-header-unit -I %t \
   8 // RUN: -xc++-user-header std-10-2-ex2-c.h -o %t/std-10-2-ex2-c.pcm
   9
  10 // RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/std-10-2-ex2-tu1.cpp \
  11 // RUN:  -o  %t/X.pcm
  12
  13 // RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/std-10-2-ex2-tu2.cpp \
  14 // RUN: -fmodule-file=%t/std-10-2-ex2-c.pcm -fmodule-file=X=%t/X.pcm \
  15 // RUN: -pedantic-errors -verify -o  %t/M.pcm
  16
  17 //--- std-10-2-ex2-b.h
  18 int f();
  19
  20 //--- std-10-2-ex2-c.h
  21 int g();
  22
  23 //--- std-10-2-ex2-tu1.cpp
  24 export module X;
  25 export int h();
  26
  27 //--- std-10-2-ex2-tu2.cpp
  28 module;
  29 #include "std-10-2-ex2-b.h"
  30
  31 export module M;
  32 import "std-10-2-ex2-c.h";  // expected-warning {{the implementation of header units is in an experimental phase}}
  33 import X;
  34 export using ::f, ::g, ::h; // OK
  35 struct S;                   // expected-note {{target of using declaration}}
  36 export using ::S;           // expected-error {{using declaration referring to 'S' with module linkage cannot be exported}}
  37
  38 namespace N {
  39 export int h();
  40 static int h(int); // expected-note {{target of using declaration}}
  41 } // namespace N
  42 export using N::h; // expected-error {{using declaration referring to 'h' with internal linkage cannot be exported}}