Working on a library: request for code review

[via Digitalmars-d-learn]

On Tuesday, 17 June 2014 at 18:35:34 UTC, Mike wrote:
> Thanks, will work on fixes tonight.
>
>
>> The current method will not detect an error when the image type
>> is not mapped  but a color map is present.
>> At least I assume that is not a valid TGA file?
>
> A non-mapped image may contain a color map ;-0 it's simply 
> discarded.
>
>
> As per your ideas
>
>>return to!bool(isColorMapped(header)
>>                       ? header.colorMapDepth.among(16, 32)
>>                       : header.pixelDepth.among(16, 32));
>
> this is not nothrow, but as you can see there is nothing that 
> can ever throw.. so perhaps I'll stick to the cast(bool) 
> thing.. Any idea?

Perhaps `return !!(...);` ?