llvm-project/clang/test/SemaTemplate/array-redeclaration.cpp

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// RUN: %clang_cc1 -fsyntax-only -verify %s
// expected-no-diagnostics
extern int array[1];
template <typename>
class C {
enum { D };
public:
template <typename A> void foo1() {
extern int array[((int)C<A>::k > (int)D) ? 1 : -1];
}
};
template<>
class C<int> {
public:
const static int k = 2;
};
void foo2() {
C<char> c;
c.foo1<int>();
}
template<int n>
void foo3() {
extern int array[n ? 1 : -1];
}
void foo4() {
foo3<5>();
}
namespace NS {
int f() { extern int arr[3]; { extern int arr[]; } return 0; }
template<typename T> void g() { extern int arr[3]; extern T arr; }
template void g<int[]>();
}