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1 // RUN: %clang_cc1 -std=c++20 -verify %s
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2 // RUN: %clang_cc1 -std=c++20 -verify %s -DDEPENDENT_OR
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3
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4 #ifdef DEPENDENT_OR
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5 // This causes the || below to be a CXXOperatorCallExpr not a BinaryOperator.
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6 struct A {}; bool operator||(A, A);
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7 #endif
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8
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9 namespace PR45589 {
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10 template<typename T> struct X { static constexpr bool value = T::value; }; // expected-error {{cannot be used prior to '::'}}
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11 struct False { static constexpr bool value = false; };
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12 struct True { static constexpr bool value = true; };
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13
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14 template<typename T> concept C = true;
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15
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16 template<bool B, typename T> constexpr int test = 0;
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17 template<bool B, typename T> requires C<T> constexpr int test<B, T> = 1;
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18 template<bool B, typename T> requires (B && C<T>) || (X<T>::value && C<T>) constexpr int test<B, T> = 2; // expected-error {{non-constant expression}} expected-note {{subexpression}} expected-note {{instantiation of}} expected-note {{while substituting}}
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19 static_assert(test<true, False> == 2);
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20 static_assert(test<true, True> == 2);
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21 static_assert(test<true, char> == 2); // satisfaction of second term of || not considered
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22 static_assert(test<false, False> == 1);
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23 static_assert(test<false, True> == 2); // constraints are partially ordered
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24 // FIXME: These diagnostics are excessive.
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25 static_assert(test<false, char> == 1); // expected-note 2{{while}} expected-note 2{{during}}
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26 }
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