Convert std::vector*> to std::vector>

Question

I want to convert std::vector<std::pair<const K, V>*> to std::vector<std::pair<const K, V>>. However, as you know due to pair<const K, V> I can't assign.

I guess there can be someway to leverage

template< class InputIt >
void assign( InputIt first, InputIt last );

to make this happen. However, I can't find a way out.

Look for advice. Thanks!!

https://stackoverflow.com/questions/6954906/does-c11-allow-vectorconst-t — Edgar Rokjān, Jul 02 '17 at 20:50
Revised the question. std::vector> should be legitimate as I see as my compiler doesn't complain. — Nan Hua, Jul 02 '17 at 23:59

score 0 · Answer 1 · answered Jul 03 '17 at 00:30

The const is only an issue if you try to assign elements or call certain functions like insert. But push_back and emplace_back will be fine.

One solution:

template <typename Elem>
std::vector<Elem> deref_vec_elems( const std::vector<Elem*>& v ) {
    std::vector<Elem> v2;
    for ( Elem* e : v )
        v2.push_back( *e );
    return v2;
}

Convert std::vector*> to std::vector>

1 Answers1