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 //--- Private.cppm
  13 export module Private;
  14 #ifdef TEST_BADINLINE
  15 inline void fn_m(); // expected-error {{un-exported inline function not defined before the private module fragment}}
  16                     // expected-note@Private.cppm:13 {{private module fragment begins here}}
  17 #endif
  18 static void fn_s();
  19 export struct X;
  20
  21 export void g(X *x) {
  22   fn_s(); // OK, call to static function in same translation unit
  23 #ifdef TEST_BADINLINE
  24   fn_m(); // fn_m is not OK.
  25 #endif
  26 }
  27 export X *factory(); // OK
  28
  29 module :private;
  30 struct X {}; // definition not reachable from importers of A
  31 X *factory() {
  32   return new X();
  33 }
  34 void fn_m() {}
  35 void fn_s() {}
  36
  37 //--- Use.cpp
  38 import Private;
  39 void foo() {
  40   X x; // expected-error 1+{{missing '#include'; 'X' must be defined before it is used}}
  41        // expected-note@Private.cppm:18 1+{{definition here is not reachable}}
  42   auto _ = factory();
  43   auto *__ = factory();
  44   X *___ = factory();
  45
  46   g(__);
  47   g(___);
  48   g(factory());
  49 }