Function template that is a member of a class template

Asked Feb 20 '20 at 14:29

Active Feb 20 '20 at 14:29

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I have the following class:

template <typename T>
struct MyStruct
{
    template <typename FunType>
    void fun(size_t idx)
    {
        if (idx == 0)
            return;

        MyStruct<FunType> obj;
        obj.fun<FunType>(idx - 1);
    }
};

Compiling this piece of code produces the following error:

error: expected primary-expression before '>' token
  obj.fun<FunType>(idx - 1);
                 ^

Strangely, changing the line MyStruct<FunType> obj; to e.g. MyStruct<int> obj; (or any other type except FunType) seems to solve the problem. Can somebody explain to me what is going on?

Thanks in advance!

asked Feb 20 '20 at 14:29

Jasper Koning

TL;DR of the dupe: You need `obj.template fun(idx - 1);` to tell the compiler you are calling a template function since `obj` is a dependent name. – NathanOliver Feb 20 '20 at 14:31
Ah, that page is indeed very helpful, thanks! – Jasper Koning Feb 20 '20 at 14:32

Function template that is a member of a class template

0 Answers0