68 lines
2 KiB
C++
68 lines
2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
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// C++-specific tests for integral constant expressions.
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const int c = 10;
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int ar[c];
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struct X0 {
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static const int value = static_cast<int>(4.0);
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};
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void f() {
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if (const int value = 17) {
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int array[value];
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}
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}
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int a() {
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const int t=t; // expected-note {{declared here}} expected-note {{read of object outside its lifetime}}
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switch(1) { // expected-warning {{no case matching constant switch condition '1'}}
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case t:; // expected-error {{not an integral constant expression}} expected-note {{initializer of 't' is not a constant expression}}
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}
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}
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// PR6206: out-of-line definitions are legit
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namespace pr6206 {
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class Foo {
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public:
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static const int kBar;
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};
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const int Foo::kBar = 20;
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char Test() {
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char str[Foo::kBar];
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str[0] = '0';
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return str[0];
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}
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}
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// PR6373: default arguments don't count.
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void pr6373(const unsigned x = 0) {
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unsigned max = 80 / x;
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}
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// rdar://9204520
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namespace rdar9204520 {
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struct A {
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static const int B = int(0.75 * 1000 * 1000); // expected-warning {{not a constant expression; folding it to a constant is a GNU extension}}
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};
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int foo() { return A::B; }
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}
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// PR11040
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const int x = 10;
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int* y = reinterpret_cast<const char&>(x); // expected-error {{cannot initialize}}
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// This isn't an integral constant expression, but make sure it folds anyway.
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struct PR8836 { char _; long long a; }; // expected-warning {{long long}}
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int PR8836test[(__typeof(sizeof(int)))&reinterpret_cast<const volatile char&>((((PR8836*)0)->a))]; // expected-warning {{folded to constant array as an extension}} expected-note {{cast that performs the conversions of a reinterpret_cast is not allowed in a constant expression}}
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const int nonconst = 1.0; // expected-note {{declared here}}
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int arr[nonconst]; // expected-warning {{folded to constant array as an extension}} expected-note {{initializer of 'nonconst' is not a constant expression}}
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const int castfloat = static_cast<int>(1.0);
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int arr2[castfloat]; // ok
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