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From: Ioannis Vranos <ivr@remove.this.grad.com>
Newsgroups: comp.lang.ada
Subject: Re: [OT] Re: Teaching new tricks to an old dog (C++ -->Ada)
Date: Sun, 13 Mar 2005 17:45:38 +0200
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Date: 2005-03-13T17:45:38+02:00
List-Id: <comp.lang.ada>

Martin Krischik wrote:

>>C:\c>g++ temp.cpp -o temp.exe
>>temp.cpp: In function `int main()':
>>temp.cpp:7: error: invalid conversion from `int' to `main()::four_val'
> 
> 
> True - C++ won't convert int to enum either without a static_cast. You know
> what I realy miss in C++: dynamic_cast for discreed number:
> 
> long X = f();
> short Y = dynamic_cast <short> (X);
> 
> with a throw range_error when X is to large for Y.
> 
> Yes - I have a template for that. But a template need two parameters
> <from_type, to_type>  and won't optimize as well as a build in function.
> And with -W3 you need a lot of specialized versions to avoid all sorts of
> "conditional ist constant" warnings.


I am not convinced yet this integer range topic is that a big issue. One 
can easily write his own test routine (function, template), if the 
default provided assert() doesn't do the job.



-- 
Ioannis Vranos

http://www23.brinkster.com/noicys