1// RUN: %clang_cc1 -fsyntax-only -verify %s 2 3// C++-specific tests for integral constant expressions. 4 5const int c = 10; 6int ar[c]; 7 8struct X0 { 9 static const int value = static_cast<int>(4.0); 10}; 11 12void f() { 13 if (const int value = 17) { 14 int array[value]; 15 } 16} 17 18int a() { 19 const int t=t; 20 switch(1) { // expected-warning {{no case matching constant switch condition '1'}} 21 case t:; // expected-error {{not an integer constant expression}} 22 } 23} 24 25// PR6206: out-of-line definitions are legit 26namespace pr6206 { 27 class Foo { 28 public: 29 static const int kBar; 30 }; 31 32 const int Foo::kBar = 20; 33 34 char Test() { 35 char str[Foo::kBar]; 36 str[0] = '0'; 37 return str[0]; 38 } 39} 40 41// PR6373: default arguments don't count. 42void pr6373(const unsigned x = 0) { 43 unsigned max = 80 / x; 44} 45 46 47// rdar://9204520 48namespace rdar9204520 { 49 50struct A { 51 static const int B = int(0.75 * 1000 * 1000); 52}; 53 54int foo() { return A::B; } 55} 56 57// PR11040 58const int x = 10; 59int* y = reinterpret_cast<const char&>(x); // expected-error {{cannot initialize}} 60 61// This isn't an integral constant expression, but make sure it folds anyway. 62struct PR8836 { char _; long long a; }; 63int PR8836test[(__typeof(sizeof(int)))&reinterpret_cast<const volatile char&>((((PR8836*)0)->a))]; 64