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annotate gcc/testsuite/g++.dg/concepts/variadic2.C @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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111
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1 // { dg-options "-std=c++17 -fconcepts" }
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2
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3 template <class T> concept bool Copyable = requires (T t) { T(t); };
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4 template <class T> concept bool Constructable = requires { T(); };
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5 template <class T> concept bool Both = Copyable<T> && Constructable<T>;
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6
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7 template <Copyable... Ts>
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8 constexpr int f(Ts...) { return 0; } // #1
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9
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10 template <Both... Ts>
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11 constexpr int f(Ts...) { return 1; } // #2
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12
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13 int main()
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14 {
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15 static_assert(f(42) == 1);
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16 }