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131
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1 // { dg-do compile { target c++11 } }
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2
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3 #include <initializer_list>
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4
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5 extern "C" int printf (const char *, ...);
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6
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7 using size_t = decltype(sizeof(0));
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8
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9 template <typename T> class ArrayRef {
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10 public:
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11 using size_type = size_t;
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12
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13 private:
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14 /// The start of the array, in an external buffer.
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15 const T *Data = nullptr;
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16
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17 /// The number of elements.
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18 size_type Length = 0;
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19
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20 public:
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21 /// Construct an ArrayRef from a std::initializer_list.
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22 /*implicit*/ ArrayRef(const std::initializer_list<T> &Vec)
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23 : Data(Vec.begin() == Vec.end() ? (T *)nullptr : Vec.begin()), // { dg-warning initializer_list }
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24 Length(Vec.size()) {}
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25
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26 const T &operator[](size_t Index) const { return Data[Index]; }
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27 };
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28
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29 int main() {
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30 const ArrayRef<int> Foo = {42};
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31 printf ("Foo %d\n", Foo[0]);
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32 }
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