Re: using charles library

[mheaney@on2.com (Matthew Heaney)]

rm@gunlab.com.ru (Roman V. Isaev) wrote in message news:<d3ba4d4c.0305260527.52e7ee57@posting.google.com>...
> I'm learning the ropes, so it might be stupid question but I tried
> use charles.maps.sorted.strings.unbounded (used sample code by 
> mheaney@on2.com from this newsgroup archive):
> 
> with Charles.Maps.Sorted.Strings.Unbounded;
> with Charles.Strings.Unbounded; use Charles.Strings.Unbounded;
> 
> package body gettext is
> 
>    package Translation_Tables is
>       new Charles.Maps.Sorted.Strings.Unbounded
>         (Element_Type => Charles.Strings.Unbounded.Container_Type);
> 
>    TT : Translation_Tables.Container_Type;
> 
> ........
> 
>    procedure load_mo_file is
> 
> ........
> 
>          Insert(TT, "key", Element => To_Container("value"));
> 
> 
> 	When I try to compile I get following error: 


The parameter name is incorrect (as was already pointed out), but you
also need a use clause:

  TT : Translation_Tables.Container_Type;
  use Translation_Tables;
...
  Insert (TT, "key", To_Container ("value"));

If you're manipulating string containers (Charles.Strings.Unbounded,
etc), then it may be easier to define a conversion operator:

  function "+" (S : String) 
    return Charles.Strings.Unbounded.Container_Type
    renames To_Container;

This allows you to say:

  Insert (TT, "key", +"value");

In C++, the string ctor allows type conversions be made silently (i.e.
there is no syntactic penalty), but Ada requires type conversions to
be explicit.