test/AST/ByteCode/cxx11-pedantic.cpp

// RUN: %clang_cc1 -verify=both,expected -std=c++11 -triple x86_64-linux -pedantic %s -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -verify=both,ref      -std=c++11 -triple x86_64-linux -pedantic %s

struct T { int n; };
const T t = { 42 }; // both-note 2{{declared here}}
struct S {
  int m : t.n; // both-warning {{width of bit-field 'm' (42 bits)}} \
               // both-warning {{expression is not an integral constant expression}} \
               // both-note {{read of non-constexpr variable 't' is not allowed}}
};

static_assert(t.n == 42, ""); // both-error {{expression is not an integral constant expression}} \
                              // both-note {{read of non-constexpr variable 't' is not allowed}}

namespace DynamicCast {
  struct S { int n; };
  constexpr S s { 16 };
  struct T {
    int n : dynamic_cast<const S*>(&s)->n; // both-warning {{constant expression}} \
                                           // both-note {{dynamic_cast}}
  };
}

namespace NewDelete {
  struct T {
    int n : *new int(4); // both-warning {{constant expression}} \
                         // both-note {{until C++20}}
  };
}