:: Re: [DNG] GTK (was Will there be a …
Góra strony
Delete this message
Reply to this message
Autor: Didier Kryn
Data:  
Dla: dng@lists.dyne.org
Temat: Re: [DNG] GTK (was Will there be a MirDevuan "WTF"?)
Le 25/07/2015 09:18, Didier Kryn a écrit :
> Le 25/07/2015 01:57, Roger Leigh a écrit :
>> This really only applies to the grandfathered-in C numeric types
>> subset of C++. As soon as you use or own types (or wrap the
>> primitives), you have control over the conversions and can define
>> your own policies.
>
>     Roger,

>
>     This is true for the user of the class, not for the author. I mean 
> the methods operating on the private part. This is typical of the C++ 
> philosophy: make everything possible but by hand crafting and at the 
> cost of possible errors an/or unreadable source.

>
>     Imagine you want to implement an integer with an allowed range [7, 
> 107], you will need to embed it inside a class and provide a setter 
> which  raises an exception if the argument is not within the range. In 
> Ada, you declare your type with its range and the compiler does the 
> check for you: everywhere it cannot determine at compile-time if the 
> value is in the range, it will silently insert the necessary 
> instructions to verify.

>
>     Didier

>