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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -verify -Wno-vla %s
// PR11925
int n;
int (&f())[n]; // expected-error {{function declaration cannot have variably modified type}}
namespace PR18581 {
template<typename T> struct pod {};
template<typename T> struct error {
typename T::error e; // expected-error {{cannot be used prior to '::'}}
};
struct incomplete; // expected-note {{forward declaration}}
void f(int n) {
pod<int> a[n];
error<int> b[n]; // expected-note {{instantiation}}
incomplete c[n]; // expected-error {{incomplete}}
}
}
void pr23151(int (&)[*]) { // expected-error {{variable length array must be bound in function definition}}
}
void test_fold() {
char a1[(unsigned long)(int *)0+1]{}; // expected-warning{{variable length array folded to constant array as an extension}}
char a2[(unsigned long)(int *)0+1] = {}; // expected-warning{{variable length array folded to constant array as an extension}}
char a3[(unsigned long)(int *)0+1];
}
// Demonstrate that the check for a static_assert-like use of VLA does not
// crash when there's no array size expression at all.
void test_null_array_size_expr() {
int array1[]; // expected-error {{definition of variable with array type needs an explicit size or an initializer}}
int array2[] = { 1, 2, 3 };
}
// Show that the check for a static_assert-like use of a VLA properly handles a
// dependent array size expression.
template <typename Ty>
void func(int expr) {
int array[sizeof(Ty) ? sizeof(Ty{}) : sizeof(int)];
int old_style_assert[expr ? Ty::one : Ty::Neg_one]; // We don't diagnose as a VLA until instantiation
}
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