pointers (help)

[hectorDUQUE]

hi guys,
please some help with pointers:

this STLplus code is good:

int main(int argc, char* argv[])
{
   digraph<string,int> graph;
   digraph<string,int>::iterator node1 = graph.insert("1");
}

this one has a reference problem:

void initGraph(const digraph<string,int>& graph){
    digraph<string,int>::iterator node1 = graph.insert("1");
}
int main(int argc, char* argv[])
{
   digraph<string,int> graph;
   initGraph(graph);
}

error: passing ‘const digraph<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int>’ as ‘this’ argument of ‘typename digraph<NT, AT>::iterator digraph<NT, AT>::insert(const NT&) [with NT = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, AT = int]’ discards qualifiers


the type of insert is:
iterator insert(const NT& node_data);


i am sure this is a easy one for you guys ...
thanks in advance.

hector

 

[Salem]

Probably because you're trying to modify something which you declared as const (hence the "discards qualifiers").


--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

 

[hectorDUQUE]

yeah; just don't declare as a const type.
thanks,

hector