69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++17 -Wc++20-compat-pedantic -verify %s
|
|
// RUN: %clang_cc1 -fsyntax-only -std=c++20 -pedantic -verify %s
|
|
|
|
struct A { // expected-note 0+{{candidate}}
|
|
A() = default; // expected-note 0+{{candidate}}
|
|
int x, y;
|
|
};
|
|
A a1 = {1, 2};
|
|
#if __cplusplus <= 201703L
|
|
// expected-warning@-2 {{aggregate initialization of type 'A' with user-declared constructors is incompatible with C++20}}
|
|
#else
|
|
// expected-error@-4 {{no matching constructor}}
|
|
#endif
|
|
A a2 = {};
|
|
|
|
struct B : A { A a; };
|
|
B b1 = {{}, {}}; // ok
|
|
B b2 = {1, 2, 3, 4};
|
|
#if __cplusplus <= 201703L
|
|
// expected-warning@-2 2{{aggregate initialization of type 'A' with user-declared constructors is incompatible with C++20}}
|
|
#else
|
|
// expected-error@-4 2{{no viable conversion from 'int' to 'A'}}
|
|
#endif
|
|
|
|
// Essentially any use of a u8 string literal in C++<=17 is broken by C++20.
|
|
// Just warn on all such string literals.
|
|
struct string { string(const char*); }; // expected-note 0+{{candidate}}
|
|
char u8arr[] = u8"hello";
|
|
const char *u8ptr = "wo" u8"rld";
|
|
string u8str = u8"test" u8"test";
|
|
#if __cplusplus <= 201703L
|
|
// expected-warning@-4 {{type of UTF-8 string literal will change}} expected-note@-4 {{remove 'u8' prefix}}
|
|
// expected-warning@-4 {{type of UTF-8 string literal will change}} expected-note@-4 {{remove 'u8' prefix}}
|
|
// expected-warning@-4 {{type of UTF-8 string literal will change}} expected-note@-4 {{remove 'u8' prefix}}
|
|
#else
|
|
// expected-error@-8 {{ISO C++20 does not permit initialization of char array with UTF-8 string literal}}
|
|
// expected-error@-8 {{cannot initialize a variable of type 'const char *' with an lvalue of type 'const char8_t [6]'}}
|
|
// expected-error@-8 {{no viable conversion from 'const char8_t [9]' to 'string'}}
|
|
#endif
|
|
|
|
template<bool b>
|
|
struct C {
|
|
explicit(C)(int);
|
|
};
|
|
#if __cplusplus <= 201703L
|
|
// expected-warning@-3 {{this expression will be parsed as explicit(bool) in C++20}}
|
|
#if defined(__cpp_conditional_explicit)
|
|
#error "the feature test macro __cpp_conditional_explicit isn't correct"
|
|
#endif
|
|
#else
|
|
// expected-error@-8 {{does not refer to a value}}
|
|
// expected-error@-9 {{expected member name or ';'}}
|
|
// expected-error@-10 {{expected ')'}}
|
|
// expected-note@-12 {{declared here}}
|
|
// expected-note@-12 {{to match this '('}}
|
|
#if !defined(__cpp_conditional_explicit) || __cpp_conditional_explicit != 201806L
|
|
#error "the feature test macro __cpp_conditional_explicit isn't correct"
|
|
#endif
|
|
#endif
|
|
|
|
auto l = []() consteval {};
|
|
int consteval();
|
|
#if __cplusplus <= 201703L
|
|
// expected-warning@-3 {{'consteval' is a keyword in C++20}}
|
|
// expected-error@-4 {{expected body of lambda expression}}
|
|
#else
|
|
// expected-error@-5 {{expected unqualified-id}}
|
|
#endif
|