forked from OSchip/llvm-project
34 lines
1.6 KiB
C++
34 lines
1.6 KiB
C++
// RUN: %clang_cc1 -std=c++2a -verify %s
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// Keep this test before any declarations of operator<=>.
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namespace PR44786 {
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template<typename T> void f(decltype(T{} <=> T{})) {} // expected-note {{previous}}
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struct S {};
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int operator<=>(S const &, S const &);
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template<typename T> void f(decltype(T{} <=> T{})) {} // expected-error {{redefinition}}
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}
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struct A {};
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constexpr int operator<=>(A a, A b) { return 42; }
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static_assert(operator<=>(A(), A()) == 42);
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int operator<=>(); // expected-error {{overloaded 'operator<=>' must have at least one parameter of class or enumeration type}}
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int operator<=>(A); // expected-error {{overloaded 'operator<=>' must be a binary operator}}
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int operator<=>(int, int); // expected-error {{overloaded 'operator<=>' must have at least one parameter of class or enumeration type}}
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int operator<=>(A, A, A); // expected-error {{overloaded 'operator<=>' must be a binary operator}}
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int operator<=>(A, A, ...); // expected-error {{overloaded 'operator<=>' cannot be variadic}}
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int operator<=>(int, A = {}); // expected-error {{parameter of overloaded 'operator<=>' cannot have a default argument}}
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struct B {
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int &operator<=>(int);
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friend int operator<=>(A, B);
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friend int operator<=>(int, int); // expected-error {{overloaded 'operator<=>' must have at least one parameter of class or enumeration type}}
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void operator<=>(); // expected-error {{overloaded 'operator<=>' must be a binary operator}};
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void operator<=>(A, ...); // expected-error {{overloaded 'operator<=>' cannot be variadic}}
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void operator<=>(A, A); // expected-error {{overloaded 'operator<=>' must be a binary operator}};
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};
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int &r = B().operator<=>(0);
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