// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++1z -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors

#if __cplusplus < 201103L
// expected-no-diagnostics
#endif

namespace dr1684 { // dr1684: 3.6
#if __cplusplus >= 201103L
  struct NonLiteral { // expected-note {{because}}
    NonLiteral();
    constexpr int f() { return 0; } // expected-warning 0-1{{will not be implicitly 'const'}}
  };
  constexpr int f(NonLiteral &) { return 0; }
  constexpr int f(NonLiteral) { return 0; } // expected-error {{not a literal type}}
#endif
}
