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1 // PR c++/53305
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2 // { dg-do compile { target c++11 } }
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3
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4 template<class... Ts> struct tuple { };
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5
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6 struct funct
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7 {
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8 template<class... argTs>
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9 int operator()(argTs...);
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10 };
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11
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12 template<class...> struct test;
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13
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14 template<template <class...> class tp,
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15 class... arg1Ts, class... arg2Ts>
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16 struct test<tp<arg1Ts...>, tp<arg2Ts...>>
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17 {
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18 template<class func, class...arg3Ts>
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19 auto test2(func fun, arg1Ts... arg1s, arg3Ts... arg3s)
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20 -> decltype(fun(arg1s..., arg3s...));
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21 };
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22
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23 int main()
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24 {
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25 test<tuple<>, tuple<char,int>> t2;
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26 t2.test2(funct(), 'a', 2);
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27 }
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