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1 // PR c++/83856
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2 // { dg-do compile { target c++14 } }
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3
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4 namespace std {
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5 template <typename _Tp> _Tp declval();
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6 template <class _E> class initializer_list {
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7 _E *_M_len;
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8
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9 public:
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10 __SIZE_TYPE__ size;
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11 _E begin();
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12 };
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13 template <typename, unsigned> struct array { void operator[](long); };
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14 } // namespace std
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15
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16 template <class> struct simd {
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17 static int size();
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18 template <class F> simd(F, decltype(std::declval<F>()(0)) * = nullptr) {}
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19 };
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20 template <class V, class... F>
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21 void test_tuples(std::initializer_list<std::array<float, 1>> data,
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22 F... fun_pack) {
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23 auto it = data.begin();
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24 const int remaining = V::size();
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25 [](...) {}((fun_pack([&](auto) { it[remaining]; }), 0)...);
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26 }
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27
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28 void f() {
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29 test_tuples<simd<float>>({}, [](simd<float>) {});
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30 }
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