D dropped in favour of C# for PSP emulator

[Ali Çehreli]

On 05/12/2012 12:26 AM, SomeDude wrote:
 > On Saturday, 12 May 2012 at 00:12:07 UTC, Timon Gehr wrote:
 >> On 05/12/2012 01:47 AM, Ali Çehreli wrote:
 >>> On 05/11/2012 02:45 PM, Timon Gehr wrote:
 >>>> On 05/11/2012 10:10 PM, Nick Sabalausky wrote:
 >>>>> I use 'in' all the time, and I never even think about it returning a
 >>>>> pointer. I just do:
 >>>>>
 >>>>> if(foo in bar)
 >>>>>
 >>>>> And it just works. So I don't see a particularly big problem here.
 >>>>>
 >>>>>
 >>>>
 >>>> Try this:
 >>>>
 >>>> bool fun(){ return foo in bar; }
 >>>
 >>> Isn't that an inconsistency in the language then? Are pointer values
 >>> implicitly convertible to bool or not?
 >>>
 >>> Ali
 >>
 >> if(condition) { ... }
 >>
 >> is equivalent to
 >>
 >> if(cast(bool)condition) { ... }
 >>
 >> i.e. this conversion is 'explicit'.
 >
 > I'm not sure what you're talking about, there is no implicit conversion
 > to bool.
 > dmd returns:
 >
 > bug.d(6): Error: cannot implicitly convert expression (foo in bar) of
 > type int* to bool
 >
 > With the cast(bool), everything works fine.

Which example are you testing with?

// With dmd 2.059, this compiles:
void main()
{
     int[int] aa;

     if (42 in aa) {
     }
}

// But this does not compile:
bool foo()
{
     int[int] aa;

     return 42 in aa;
}

Ali

-- 
D Programming Language Tutorial: http://ddili.org/ders/d.en/index.html