ba15d186e5
During the ISO C++ Committee meeting plenary session the C++23 Standard has been voted as technical complete. This updates the reference to c++2b to c++23 and updates the __cplusplus macro. Drive-by fixes c++1z -> c++17 and c++2a -> c++20 when seen. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D149553
59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx23 -std=c++23 %s
|
|
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx20 -std=c++20 %s
|
|
|
|
//cxx23-no-diagnostics
|
|
|
|
struct S {
|
|
constexpr int operator[](int i) {
|
|
return i;
|
|
}
|
|
constexpr int operator[](int a, int b) { // cxx20-error {{overloaded 'operator[]' cannot have more than one parameter before C++23}}
|
|
return a + b;
|
|
}
|
|
constexpr int operator[]() { // cxx20-error {{overloaded 'operator[]' cannot have no parameter before C++23}}
|
|
return 42;
|
|
}
|
|
};
|
|
|
|
struct Defaults {
|
|
constexpr int operator[](int i = 0) { // cxx20-error {{overloaded 'operator[]' cannot have a defaulted parameter before C++23}}
|
|
return 0;
|
|
}
|
|
constexpr int operator[](int a, int b, int c = 0) { // cxx20-error {{overloaded 'operator[]' cannot have a defaulted parameter before C++23}}\
|
|
// cxx20-error {{cannot have more than one parameter before C++23}}
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
template <typename... T>
|
|
struct T1 {
|
|
constexpr auto operator[](T &&...arg); // cxx20-error {{overloaded 'operator[]' cannot have no parameter before C++23}} \
|
|
// cxx20-error {{overloaded 'operator[]' cannot have more than one parameter before C++23}}
|
|
};
|
|
|
|
T1<> t10; // cxx20-note {{requested here}}
|
|
T1<int, int> t12; // cxx20-note {{requested here}}
|
|
T1<int> t11;
|
|
|
|
struct Variadic {
|
|
constexpr int operator[](auto &&...arg) { return 0; }
|
|
};
|
|
|
|
void f() {
|
|
S s;
|
|
(void)s[0];
|
|
(void)s[1, 2]; // cxx20-warning {{left operand of comma operator has no effect}}\
|
|
// cxx20-warning {{top-level comma expression in array subscript is deprecated in C++20 and unsupported in C++23}}
|
|
(void)S{}[]; // cxx20-error {{expected expression}}
|
|
|
|
(void)Defaults{}[1];
|
|
(void)Defaults{}[]; // cxx20-error {{expected expression}}
|
|
(void)Defaults{}[1, 2]; // cxx20-warning {{left operand of comma operator has no effect}}\
|
|
// cxx20-warning {{top-level comma expression in array subscript is deprecated in C++20 and unsupported in C++23}}
|
|
|
|
Variadic{}[]; // cxx20-error {{expected expression}}
|
|
Variadic{}[1];
|
|
Variadic{}[1, 2]; // cxx20-warning {{left operand of comma operator has no effect}}\
|
|
// cxx20-warning {{top-level comma expression in array subscript is deprecated in C++20 and unsupported in C++23}}
|
|
}
|