C++11 (gcc 4.9): error at template function (converting tuple vector to single component vector)

Asked May 08 '15 at 18:07

Active May 08 '15 at 18:07

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when compiling following code with C++11 (gcc 4.9), I get a compiler error:

//converts tuple vector to single component vector
template<class In, class Out, int Idx>
QVector<Out> tuple_vector_to_member_vector (const QVector<In>& in_vector)
{
    QVector<Out> out_vector;
    for (In in : in_vector)
        out_vector.push_back(in.get<Idx>());
    return out_vector;
}

The error is as following (and occurs as well when the template is not instantiated):

 error: expected primary-expression before ')' token
     out_vector.push_back(in.get<Idx>());

(Visual C++ 2013 accepts it on the other hand.)

I guess that one have to place

typename In::get<Idx>

or similar in any form, but I don't know where.

Has someone an idea?

Thank you.

asked May 08 '15 at 18:07

Horst

1

`in.template get` – Columbo May 08 '15 at 18:08
@Columbo you should post an answer rather than a comment, no matter how small it is. – vsoftco May 08 '15 at 18:09
afaik C++11 dropped the requirement to place template keyword before template member functions(I could be wrong tho), but yes, that is the problem – Creris May 08 '15 at 18:17
following code seems to be accepted by gcc 4.9: out_vector.push_back(in.In::template get()); – Horst May 08 '15 at 18:22

C++11 (gcc 4.9): error at template function (converting tuple vector to single component vector)

0 Answers0