clang/test/Parser/cxx2c-variadic-friends-ext-diags.cpp

   1 // RUN: %clang_cc1 -std=c++2c -verify=compat -fsyntax-only -Wpre-c++26-compat %s
   2 // RUN: %clang_cc1 -std=c++11 -verify=pre2c -fsyntax-only -Wc++26-extensions %s
   3
   4 struct S {
   5   friend int, long, char; // compat-warning {{variadic 'friend' declarations are incompatible with C++ standards before C++2c}} \
   6                           // pre2c-warning {{variadic 'friend' declarations are a C++2c extension}}
   7 };
   8
   9 template <typename ...Types>
  10 struct TS {
  11   friend Types...; // compat-warning {{variadic 'friend' declarations are incompatible with C++ standards before C++2c}} \
  12                    // pre2c-warning {{variadic 'friend' declarations are a C++2c extension}}
  13
  14   friend int, Types..., Types...; // compat-warning {{variadic 'friend' declarations are incompatible with C++ standards before C++2c}} \
  15                                   // pre2c-warning {{variadic 'friend' declarations are a C++2c extension}}
  16 };