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annotate gcc/testsuite/g++.dg/cpp2a/concepts-pr71368.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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145
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1 // PR c++/71368
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2 // { dg-do compile { target c++2a } }
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3
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4 template <class T, class U> concept Same = __is_same_as(T,U);
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5
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6 struct inner;
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7
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8 template<typename X> concept CompoundReq = requires {
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9 // fine with concrete type in trailing type, i.e. inner& instead of X&
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10 { X::inner_member() } -> Same<X&>;
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11 };
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12
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13 template<typename X> concept Concept = requires {
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14 { X::outer_member() } -> CompoundReq;
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15 };
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16
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17 struct inner { static inner& inner_member(); };
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18 struct outer { static inner outer_member(); };
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19
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20 int main()
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21 {
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22 // fine
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23 static_assert( CompoundReq<inner> );
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24 static_assert( CompoundReq<decltype( outer::outer_member() )> );
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25
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26 // ICE
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27 static_assert( Concept<outer> );
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28 }