mirror of git://gcc.gnu.org/git/gcc.git
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
// { dg-options "-std=c++1z" }
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template<typename T>
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concept bool Class() { return __is_class(T); }
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template<typename T>
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concept bool Union() { return __is_union(T); }
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// Check ordering of specializations
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template<typename T>
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concept bool One() { return sizeof(T) >= 4; }
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template<typename T>
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concept bool Two() { return One<T>() && sizeof(T) >= 8; }
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// Check non-overlapping specializations
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template<typename T>
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struct S1 { static const int value = 0; };
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template<Class T>
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struct S1<T> { static const int value = 1; };
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template<Union T>
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struct S1<T> { static const int value = 2; };
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struct S { };
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union U { };
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static_assert(S1<int>::value == 0, "");
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static_assert(S1<S>::value == 1, "");
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static_assert(S1<U>::value == 2, "");
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// Check ordering of partial specializaitons
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template<typename T>
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struct S2 { static const int value = 0; };
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template<One T>
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struct S2<T> { static const int value = 1; };
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template<Two T>
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struct S2<T> { static const int value = 2; };
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struct one_type { char x[4]; };
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struct two_type { char x[8]; };
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static_assert(S2<char>::value == 0, "");
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static_assert(S2<one_type>::value == 1, "");
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static_assert(S2<two_type>::value == 2, "");
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int main() { }
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