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// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
// RUN: %clang_cc1 -fsyntax-only -verify -pedantic -std=gnu++98 %s
// RUN: %clang_cc1 -fsyntax-only -verify -pedantic -std=gnu++11 %s
// C++-specific tests for integral constant expressions.
const int c = 10;
int ar[c];
struct X0 {
static const int value = static_cast<int>(4.0);
};
void f() {
if (const int value = 17) {
int array[value];
}
}
int a() {
const int t=t; // expected-note {{declared here}}
switch(1) { // do not warn that 1 is not a case value;
// 't' might have been expected to evalaute to 1
case t:; // expected-note {{initializer of 't' is not a constant expression}}
#if __cplusplus <= 199711L
// expected-error@-2 {{not an integral constant expression}}
#else
// expected-error@-4 {{case value is not a constant expression}}
#endif
}
}
// PR6206: out-of-line definitions are legit
namespace pr6206 {
class Foo {
public:
static const int kBar;
};
const int Foo::kBar = 20;
char Test() {
char str[Foo::kBar];
str[0] = '0';
return str[0];
}
}
// PR6373: default arguments don't count.
void pr6373(const unsigned x = 0) {
unsigned max = 80 / x;
}
// rdar://9204520
namespace rdar9204520 {
struct A {
static const int B = int(0.75 * 1000 * 1000);
#if __cplusplus <= 199711L
// expected-warning@-2 {{not a constant expression; folding it to a constant is a GNU extension}}
#endif
};
int foo() { return A::B; }
}
// PR11040
const int x = 10;
int* y = reinterpret_cast<const char&>(x); // expected-error {{cannot initialize}}
// This isn't an integral constant expression, but make sure it folds anyway.
struct PR8836 { char _; long long a; };
#if __cplusplus <= 199711L
// expected-warning@-2 {{'long long' is a C++11 extension}}
#endif
int PR8836test[(__typeof(sizeof(int)))&reinterpret_cast<const volatile char&>((((PR8836*)0)->a))];
// expected-warning@-1 0-1{{C99 feature}} expected-warning@-1 {{folded to constant array as an extension}}
// expected-note@-2 {{cast that performs the conversions of a reinterpret_cast is not allowed in a constant expression}}
const int nonconst = 1.0;
#if __cplusplus <= 199711L
// expected-note@-2 {{declared here}}
#endif
int arr[nonconst];
#if __cplusplus <= 199711L
// expected-warning@-2 0-1{{C99 feature}} expected-warning@-2 {{folded to constant array as an extension}}
// expected-note@-3 {{initializer of 'nonconst' is not a constant expression}}
#endif
const int castfloat = static_cast<int>(1.0);
int arr2[castfloat]; // ok
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