clang/test/Modules/cxx20-10-2-ex4.cpp

   1 // Based on C++20 10.2 example 4.
   2
   3 // RUN: %clang_cc1 -std=c++20 -emit-module-interface %s -verify -o %t
   4
   5 export module M;
   6
   7 struct S { // expected-note {{previous declaration is here}}
   8   int n;
   9 };
  10 typedef S S;
  11 export typedef S S; // OK, does not redeclare an entity
  12 export struct S;    // expected-error {{cannot export redeclaration 'S' here since the previous declaration has module linkage}}