clang/test/Modules/Reachability-Private.cpp

   1 // Tests that the definition in private module fragment is not reachable to its users.
   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 %t/Private.cppm -emit-module-interface \
   8 // RUN: -o %t/Private.pcm
   9 // RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/Use.cpp \
  10 // RUN: -DTEST_BADINLINE -verify -fsyntax-only
  11
  12 // Test again with reduced BMI.
  13 // RUN: rm -rf %t
  14 // RUN: mkdir -p %t
  15 // RUN: split-file %s %t
  16 //
  17 // RUN: %clang_cc1 -std=c++20 %t/Private.cppm -emit-reduced-module-interface \
  18 // RUN: -o %t/Private.pcm
  19 // RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/Use.cpp \
  20 // RUN: -DTEST_BADINLINE -verify -fsyntax-only
  21
  22 //--- Private.cppm
  23 export module Private;
  24 #ifdef TEST_BADINLINE
  25 inline void fn_m(); // expected-error {{un-exported inline function not defined before the private module fragment}}
  26                     // expected-note@Private.cppm:13 {{private module fragment begins here}}
  27 #endif
  28 static void fn_s();
  29 export struct X;
  30
  31 export void g(X *x) {
  32   fn_s(); // OK, call to static function in same translation unit
  33 #ifdef TEST_BADINLINE
  34   fn_m(); // fn_m is not OK.
  35 #endif
  36 }
  37 export X *factory(); // OK
  38
  39 module :private;
  40 struct X {}; // definition not reachable from importers of A
  41 X *factory() {
  42   return new X();
  43 }
  44 void fn_m() {}
  45 void fn_s() {}
  46
  47 //--- Use.cpp
  48 import Private;
  49 void foo() {
  50   X x; // expected-error 1+{{missing '#include'; 'X' must be defined before it is used}}
  51        // expected-note@Private.cppm:18 1+{{definition here is not reachable}}
  52   auto _ = factory();
  53   auto *__ = factory();
  54   X *___ = factory();
  55
  56   g(__);
  57   g(___);
  58   g(factory());
  59 }