23 lines
945 B
C++
23 lines
945 B
C++
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17
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void foo(int* a, int *b) {
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a -= b; // expected-error {{incompatible integer to pointer conversion assigning to 'int *' from}}
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}
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template<typename T> T declval();
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struct true_type { static const bool value = true; };
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struct false_type { static const bool value = false; };
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template<bool, typename T, typename U> struct select { using type = T; };
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template<typename T, typename U> struct select<false, T, U> { using type = U; };
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template<typename T>
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typename select<(sizeof(declval<T>() -= declval<T>(), 1) != 1), true_type, false_type>::type test(...);
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template<typename T> false_type test(...);
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template<typename T>
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static const auto has_minus_assign = decltype(test<T>())::value;
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static_assert(has_minus_assign<int*>, "failed"); // expected-error {{static_assert failed due to requirement 'has_minus_assign<int *>' "failed"}}
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