File: initlist-deduce.C

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gcc-arm-none-eabi 15%3A7-2018-q2-6
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// Test for deduction of T as std::initializer_list.  This isn't currently
// supported by the working draft, but is necessary for perfect forwarding
// of initializer-lists to things that can take a std::initializer_list.

// { dg-options "-fdeduce-init-list" }
// { dg-do run { target c++11 } }

#include <initializer_list>

struct A
{
  A(std::initializer_list<int>) { }
};

void f (A a) { }

template <class T>
auto g (T&& t) -> decltype (f(t)) // { dg-warning "call" }
{
  return f(t);
}

int main()
{
  g({1});			// { dg-warning "deduc" }
}

// { dg-prune-output "-fno-deduce-init-list" }