System programming in D (Was: The God Language)

[Iain Buclaw]

On 6 January 2012 00:03, Walter Bright <newshound2 at digitalmars.com> wrote:
> On 1/5/2012 1:43 PM, Manu wrote:
>>
>> On 5 January 2012 23:30, Walter Bright <newshound2 at digitalmars.com
>>
>> <mailto:newshound2 at digitalmars.com>> wrote:
>>
>>    On 1/5/2012 8:49 AM, Manu wrote:
>>
>>        I also wonder if the D language provides some opportunities for
>> optimisation
>>        that aren't expressible in other languages,
>>
>>
>>    There are some. One that is currently being exploited by the optimizer
>> and
>>    back end is the existence of pure functions.
>>
>>
>> Does GDC currently support these same optimisations, or is this a DMD
>> special power?
>
>
> I don't know what GDC does.

GDC ties D optimisations to function attributes of GCC, so you'll have
do you some reading up on the meaning. :)

There are three levels of purity, these are matched to are const, pure
and novops attributes.


-- 
Iain Buclaw

*(p < e ? p++ : p) = (c & 0x0f) + '0';