gcc/testsuite/g++.dg/cpp1y/paren1.C

// PR c++/63437
// { dg-do compile { target c++11 } }

struct X // movable but not copyable
{
    X() = default;
    X(X &&) = default;

    X(const X &) = delete;
};

X non_parenthesized()
{
    X x;
    return x; // works
}

X parenthesized()
{
    X x;
    return (x); // error: use of deleted function 'X::X(const X&)'
}

template <class T>
T parenthesized_t()
{
  T t;
  return (t);
}

template X parenthesized_t<X>();