forked from OSchip/llvm-project
134 lines
5.6 KiB
C++
134 lines
5.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++17 -pedantic -verify %s
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// RUN: %clang_cc1 -fsyntax-only -std=c++20 -Wc++17-compat-pedantic -verify %s -Wno-defaulted-function-deleted
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struct A {};
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int (A::*pa)() const&;
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int use_pa = (A().*pa)();
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{invoking a pointer to a 'const &' member function on an rvalue is a C++20 extension}}
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#else
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// expected-warning@-4 {{invoking a pointer to a 'const &' member function on an rvalue is incompatible with C++ standards before C++20}}
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#endif
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struct B {
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void b() {
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(void) [=, this] {};
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{explicit capture of 'this' with a capture default of '=' is a C++20 extension}}
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#else
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// expected-warning@-4 {{explicit capture of 'this' with a capture default of '=' is incompatible with C++ standards before C++20}}
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#endif
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}
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int n : 5 = 0;
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{default member initializer for bit-field is a C++20 extension}}
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#else
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// expected-warning@-4 {{default member initializer for bit-field is incompatible with C++ standards before C++20}}
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#endif
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};
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auto Lambda = []{};
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decltype(Lambda) AnotherLambda;
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#if __cplusplus <= 201703L
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// expected-error@-2 {{no matching constructor}} expected-note@-3 2{{candidate}}
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#else
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// expected-warning@-4 {{default construction of lambda is incompatible with C++ standards before C++20}}
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#endif
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void copy_lambda() { Lambda = Lambda; }
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#if __cplusplus <= 201703L
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// expected-error@-2 {{deleted}} expected-note@-10 {{lambda}}
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#else
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// expected-warning@-4 {{assignment of lambda is incompatible with C++ standards before C++20}}
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#endif
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struct DefaultDeleteWrongTypeBase {
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DefaultDeleteWrongTypeBase(DefaultDeleteWrongTypeBase&);
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};
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struct DefaultDeleteWrongType : DefaultDeleteWrongTypeBase {
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DefaultDeleteWrongType(const DefaultDeleteWrongType&) = default;
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#if __cplusplus <= 201703L
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// expected-error@-2 {{a member or base requires it to be non-const}}
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#else
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// expected-warning@-4 {{explicitly defaulting this copy constructor with a type different from the implicit type is incompatible with C++ standards before C++20}}
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#endif
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};
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void ForRangeInit() {
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for (int arr[3] = {1, 2, 3}; int n : arr) {}
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{range-based for loop initialization statements are a C++20 extension}}
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#else
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// expected-warning@-4 {{range-based for loop initialization statements are incompatible with C++ standards before C++20}}
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#endif
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}
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struct ConstexprVirtual {
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virtual constexpr void f() {}
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#if __cplusplus <= 201703L
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// expected-error@-2 {{virtual function cannot be constexpr}}
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#else
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// expected-warning@-4 {{virtual constexpr functions are incompatible with C++ standards before C++20}}
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#endif
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};
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struct C { int x, y, z; };
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static auto [cx, cy, cz] = C();
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{decomposition declaration declared 'static' is a C++20 extension}}
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#else
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// expected-warning@-4 {{decomposition declaration declared 'static' is incompatible with C++ standards before C++20}}
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#endif
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void f() {
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static thread_local auto [cx, cy, cz] = C();
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#if __cplusplus <= 201703L
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// expected-warning@-2 {{decomposition declaration declared with 'static thread_local' specifiers is a C++20 extension}}
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#else
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// expected-warning@-4 {{decomposition declaration declared with 'static thread_local' specifiers is incompatible with C++ standards before C++20}}
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#endif
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}
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struct DefaultedComparisons {
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bool operator==(const DefaultedComparisons&) const = default;
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bool operator!=(const DefaultedComparisons&) const = default;
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#if __cplusplus <= 201703L
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// expected-warning@-3 {{defaulted comparison operators are a C++20 extension}}
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// expected-warning@-3 {{defaulted comparison operators are a C++20 extension}}
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#else
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// expected-warning@-6 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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// expected-warning@-6 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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#endif
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bool operator<=>(const DefaultedComparisons&) const = default;
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#if __cplusplus <= 201703L
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// expected-error@-2 {{'operator<=' cannot be the name of a variable or data member}} expected-error@-2 0+{{}} expected-warning@-2 {{}}
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#else
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// expected-warning@-4 {{'<=>' operator is incompatible with C++ standards before C++20}}
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#endif
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bool operator<(const DefaultedComparisons&) const = default;
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bool operator<=(const DefaultedComparisons&) const = default;
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bool operator>(const DefaultedComparisons&) const = default;
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bool operator>=(const DefaultedComparisons&) const = default;
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#if __cplusplus <= 201703L
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// expected-error@-5 {{only special member functions}}
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// expected-error@-5 {{only special member functions}}
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// expected-error@-5 {{only special member functions}}
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// expected-error@-5 {{only special member functions}}
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#else
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// expected-warning@-10 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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// expected-warning@-10 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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// expected-warning@-10 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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// expected-warning@-10 {{defaulted comparison operators are incompatible with C++ standards before C++20}}
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#endif
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};
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namespace NTTP {
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struct A {};
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template<A> struct Class {};
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#if __cplusplus <= 201703L
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// expected-error@-2 {{non-type template parameter cannot have type 'NTTP::A' before C++20}}
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#else
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// expected-warning@-4 {{non-type template parameter of type 'NTTP::A' is incompatible with C++ standards before C++20}}
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#endif
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}
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