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// RUN: %clang_cc1 -fsyntax-only -std=c++2c -verify=expected,cxx26 %s
// RUN: %clang_cc1 -fsyntax-only -std=c++2b -verify=expected,cxx23 %s
struct S {};
struct T : S {} t;
consteval void test() {
void* a = &t;
const void* b = &t;
volatile void* c = &t;
(void)static_cast<T*>(a);
(void)static_cast<const T*>(a);
(void)static_cast<volatile T*>(a);
(void)(T*)(a);
(void)(const T*)(a);
(void)(volatile T*)(a);
(void)static_cast<T*>(b); // expected-error {{static_cast from 'const void *' to 'T *' casts away qualifiers}}
(void)static_cast<volatile T*>(b); // expected-error {{static_cast from 'const void *' to 'volatile T *' casts away qualifiers}}
(void)static_cast<const T*>(b);
(void)static_cast<volatile const T*>(b);
(void)static_cast<T*>(c); // expected-error{{static_cast from 'volatile void *' to 'T *' casts away qualifiers}}
(void)static_cast<volatile T*>(c);
(void)static_cast<const T*>(b);
(void)static_cast<volatile const T*>(b);
}
void err() {
constexpr void* a = &t;
constexpr auto err1 = static_cast<int*>(a); // expected-error{{constexpr variable 'err1' must be initialized by a constant expression}} \
// cxx23-note {{cast from 'void *' is not allowed in a constant expression in C++ standards before C++2c}} \
// cxx26-note {{cast from 'void *' is not allowed in a constant expression because the pointed object type 'T' is not similar to the target type 'int'}}
constexpr auto err2 = static_cast<S*>(a); // expected-error{{constexpr variable 'err2' must be initialized by a constant expression}} \
// cxx23-note {{cast from 'void *' is not allowed in a constant expression in C++ standards before C++2c}} \
// cxx26-note {{cast from 'void *' is not allowed in a constant expression because the pointed object type 'T' is not similar to the target type 'S'}}
}
int* p;
constexpr int** pp = &p;
constexpr void* vp = pp;
constexpr auto cvp = static_cast<const int* volatile*>(vp);
// cxx23-error@-1 {{constant expression}}
// cxx23-note@-2 {{cast from 'void *' is not allowed in a constant expression}}
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