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 // Test again with reduced BMI.
  18 // RUN: %clang_cc1 -std=c++20 -emit-header-unit -I %t \
  19 // RUN: -xc++-user-header std-10-2-ex2-c.h -o %t/std-10-2-ex2-c.pcm
  20
  21 // RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface %t/std-10-2-ex2-tu1.cpp \
  22 // RUN:  -o  %t/X.pcm
  23
  24 // RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface %t/std-10-2-ex2-tu2.cpp \
  25 // RUN: -fmodule-file=%t/std-10-2-ex2-c.pcm -fmodule-file=X=%t/X.pcm \
  26 // RUN: -pedantic-errors -verify -o  %t/M.pcm
  27
  28
  29 //--- std-10-2-ex2-b.h
  30 int f();
  31
  32 //--- std-10-2-ex2-c.h
  33 int g();
  34
  35 //--- std-10-2-ex2-tu1.cpp
  36 export module X;
  37 export int h();
  38
  39 //--- std-10-2-ex2-tu2.cpp
  40 module;
  41 #include "std-10-2-ex2-b.h"
  42
  43 export module M;
  44 import "std-10-2-ex2-c.h";  // expected-warning {{the implementation of header units is in an experimental phase}}
  45 import X;
  46 export using ::f, ::g, ::h; // OK
  47 struct S;                   // expected-note {{target of using declaration}}
  48 export using ::S;           // expected-error {{using declaration referring to 'S' with module linkage cannot be exported}}
  49
  50 namespace N {
  51 export int h();
  52 static int h(int); // expected-note {{target of using declaration}}
  53 } // namespace N
  54 export using N::h; // expected-error {{using declaration referring to 'h' with internal linkage cannot be exported}}