Re: Problem with compilator DEV C++

osmium wrote:
> "Francis Glassborow" writes:
> 
>> osmium wrote:
>>> "lito" wrote:
>>>
>>>> Excuse for my english
>>>> I have a problem with implementation of a class. I write the code
>>>>
>>>> // GradeBooh.h
>>>> // questo file contiene la definizione della  classe GradeBook.h
>>>> #include <string>
>>>> using std::string;
>>> That's a very bad practice.  Confine using directives to cpp files,
this 
>>> exposes the using all over the place.
>> That is NOT a using directive but a perfectly (to me) acceptable using 
>> declaration.
> 
> Granted, it's a declaration and not a directive.
> 
> Now let's see if I have this straight.  Let's say, just for the sake of 
> argument, that stealing is a bad thing.  But it is "perfectly
acceptable" if 
> you only steal *one* thing at a time?  Is that the rule?. 
> 
As analogies go, that one is pretty terrible.
The problem with using directives is that it injects a bundle of unknown 
names into the current scope with potentially unforeseen consequences. A 
using declaration is a beast of an entirely different stripe and lacks 
the danger inherent in a directive.