API

Idan Arye via Digitalmars-d digitalmars-d at puremagic.com
Mon May 5 17:52:03 PDT 2014


On Tuesday, 6 May 2014 at 00:10:36 UTC, Andrei Alexandrescu wrote:
> So I'm looking at creation functions and in particular creation 
> functions for arrays.
>
> 1. Follow the new int[n] convention:
>
> auto a = allok.make!(int[])(42);
> assert(a.length == 42);
> assert(a.equal(repeat(0, 42));
>
> 2. Follow the [ literal ] convention:
>
> auto a = allok.make!(int[])(42);
> assert(a.length == 1);
> assert(a[0] == 42);
>
> For the second option, to create longer arrays:
>
> auto a = allok.make!(int[])(42, 43, 44);
> assert(a.length == 3);
> assert(a.equal(iota(42, 45));
>
> Nice ways to repeat things:
>
> auto a = allok.make!(int[])(42, repeat(43, 5), 44);
>
> And even nice ways to create holes for efficiency:
>
> auto a = allok.make!(int[])(42, uninitialized(5), 44);
>
>
> Destroy.
>
> Andrei

The first option should have better performance(write fast code). 
The second method allows more expressiveness(write code fast). I 
generally like expressiveness, but direct memory allocation is 
low level programming, so fast code should take precedence.


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