| // RUN: %clang_cc1 -std=c++2c -verify=cxx26 -fsyntax-only -Wpre-c++26-compat %s |
| // RUN: %clang_cc1 -std=c++11 -verify=cxx11 -fsyntax-only -Wc++26-extensions %s |
| |
| template <typename... T> |
| void f(T... t) { |
| // cxx26-warning@+2 {{pack indexing is incompatible with C++ standards before C++2c}} |
| // cxx11-warning@+1 {{pack indexing is a C++2c extension}} |
| using a = T...[0]; |
| |
| // cxx26-warning@+2 {{pack indexing is incompatible with C++ standards before C++2c}} |
| // cxx11-warning@+1 {{pack indexing is a C++2c extension}} |
| using b = typename T...[0]::a; |
| |
| // cxx26-warning@+2 2{{pack indexing is incompatible with C++ standards before C++2c}} |
| // cxx11-warning@+1 2{{pack indexing is a C++2c extension}} |
| t...[0].~T...[0](); |
| |
| // cxx26-warning@+2 {{pack indexing is incompatible with C++ standards before C++2c}} |
| // cxx11-warning@+1 {{pack indexing is a C++2c extension}} |
| T...[0] c; |
| } |
