Re: Template to insert into a map? Is this really necessary?

On Jul 5, 12:49 pm, "Jim Langston" <tazmas...@rocketmail.com> wrote:


This is an error; you can't bind a temporary to
a non-const reference. Either switch your compiler
to conforming mode, or post your exact code.

Also, why would you want to return a reference
to the input data. It doesn't make any logical
sense to do anything with it once a copy of it
has been put into the map.


You seem to have omitted trying:
  Dropdowns.insert( std::make_pair(
    std::string("RoteDots"), DropDownBox( Parent, IDC_RoteDots ) ) );

(the whole point of std::make_pair is that you do
not explicitly specify the template parameters).

If you dont mind using a function then the obvious is
(replace Ddmap with the typedef you've defined for
your map):
  void insert_dropdown( Ddmap &map,
    Ddmap::key_type const &key, Ddmap::value_type const &value )
  {
    map.insert( std::make_pair(key, value) );
  }

and then call:
  insert_map( Dropdowns, "RoteDots, DropDownBox(foo,bar) );

You could even go as far as:
  void insert_dropdown( Ddmap &map,
    Ddmap::key_type const &key, Foo *foo, Bar *bar )
  {
    map.insert( std::make_pair(key, DropdownBox(foo,bar)) );
  }