clang/test/Modules/cxx20-10-2-ex1.cpp

   1 // Based on C++20 10.2 example 1.
   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-module-interface %t/std-10-2-ex1-tu1.cpp \
   8 // RUN: -pedantic-errors -verify -o %t/m1.pcm
   9
  10 //--- std-10-2-ex1.h
  11 export int x;
  12
  13 //--- std-10-2-ex1-tu1.cpp
  14 module;
  15
  16 #include "std-10-2-ex1.h"
  17 // expected-error@std-10-2-ex1.h:* {{export declaration can only be used within a module purview}}
  18
  19 export module M1;
  20 export namespace {} // expected-error {{anonymous namespaces cannot be exported}}
  21 export namespace { // expected-error {{anonymous namespaces cannot be exported}}
  22 int a1;
  23 }
  24 namespace {    // expected-note {{anonymous namespace begins here}}
  25 export int a2; // expected-error {{export declaration appears within anonymous namespace}}
  26 }
  27 export static int b; // expected-error {{declaration of 'b' with internal linkage cannot be exported}}
  28 export int f();      // OK
  29
  30 export namespace N {}     // namespace N
  31 export using namespace N; // No diagnostic after P2615R1 DR