Article about problems & suggestions for D 2.0

[Mafi]

Am 28.08.2011 23:13, schrieb dsimcha:
> On 8/28/2011 4:52 PM, Andrei Alexandrescu wrote:
>> It is quite easy to define C++-like cast operators as D functions. If
>> there's enough demand for that, we may include such in the standard
>> library.
>>
>> Andrei
>
> I think we should define at least the following and probably put them in
> std.conv, since these would add real value over the cast operator, the
> first in terms of straightforwardness and readability and the second in
> terms of error checking:
>
> reinterpretCast: Reinterprets the bit pattern at a given address as some
> other type. This should be broadened from C++ to allow
> reinterpretCasting from any type to any type. For example:
>
> // Fancy way of making a floating point number negative.
> float f = 5;
> auto i = reinterpretCast!int(f);
>
> // Flip the sign bit.
> i &= ~(1 << 31);
> f = reinterpretCast!float(i);
>
> dynamicCast: Cast a class to another. This should throw something
> derived from Error (not Exception) on failure instead of just returning
> null. If you want null, just use the cast operator. Maybe we should
> change its name, though. How about checkedCast or downCast?

I think, to!someClass(x) works like you want dynamic cast to work.