clang/test/Parser/cxx1z-nested-namespace-definition.cpp

   1 // RUN: cp %s %t
   2 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++98
   3 // RUN: not %clang_cc1 -x c++ -std=c++14 -fixit %t -Werror -DFIXIT
   4 // RUN: %clang_cc1 -x c++ -std=c++14 %t -DFIXIT
   5 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17 -Wc++14-compat
   6
   7 namespace foo1::foo2::foo3 {
   8 #if __cplusplus <= 201400L
   9 // expected-warning@-2 {{nested namespace definition is a C++17 extension; define each namespace separately}}
  10 #else
  11 // expected-warning@-4 {{nested namespace definition is incompatible with C++ standards before C++17}}
  12 #endif
  13   int foo(int x) { return x; }
  14 }
  15
  16 #ifndef FIXIT
  17 inline namespace goo::bar { // expected-error {{nested namespace definition cannot be 'inline'}} expected-warning 0-1{{C++11 feature}}
  18   int n;
  19 }
  20
  21 int m = goo::bar::n;
  22 #endif
  23
  24 int foo(int x) {
  25   return foo1::foo2::foo3::foo(x);
  26 }
  27
  28 namespace bar1 {
  29   namespace bar2 {
  30     namespace bar3 {
  31       int bar(int x) { return x; }
  32     }
  33   }
  34 }
  35
  36 int bar(int x) {
  37   return bar1::bar2::bar3::bar(x);
  38 }