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comparison gcc/testsuite/g++.dg/warn/Winit-list2.C @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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111:04ced10e8804 131:84e7813d76e9
1 // { dg-do compile { target c++11 } }
2
3 #include <initializer_list>
4
5 extern "C" int printf (const char *, ...);
6
7 using size_t = decltype(sizeof(0));
8
9 template <typename T> class ArrayRef {
10 public:
11 using size_type = size_t;
12
13 private:
14 /// The start of the array, in an external buffer.
15 const T *Data = nullptr;
16
17 /// The number of elements.
18 size_type Length = 0;
19
20 public:
21 /// Construct an ArrayRef from a std::initializer_list.
22 /*implicit*/ ArrayRef(const std::initializer_list<T> &Vec)
23 : Data(Vec.begin() == Vec.end() ? (T *)nullptr : Vec.begin()), // { dg-warning initializer_list }
24 Length(Vec.size()) {}
25
26 const T &operator[](size_t Index) const { return Data[Index]; }
27 };
28
29 int main() {
30 const ArrayRef<int> Foo = {42};
31 printf ("Foo %d\n", Foo[0]);
32 }