A pattern I'd like to see more of - Parsing template parameter tuples

[Manu]

I don't really like that SomeObject() will be instantiated a crap load
of times for every possible combination and order of options that a
user might want to supply. How do you control the bloat in a way that
people won't mess up frequently?

On 20 May 2018 at 17:58, Neia Neutuladh via Digitalmars-d
<digitalmars-d at puremagic.com> wrote:
> On Monday, 21 May 2018 at 00:13:26 UTC, Ethan wrote:
>>
>> Code for context:
>> https://github.com/GooberMan/binderoo/blob/master/binderoo_client/d/src/binderoo/util/enumoptions.d
>
>
> This looks good. One small caveat:
>
> alias DocumentType = SomeDocument!(ObjectVersion._1_0, ObjectEncoding.UTF8);
> alias DocumentType2 = SomeDocument!(ObjectEncoding.UTF8,
> ObjectVersion._1_0);
>
> These are not the same type; they're two identical types with different
> mangles. You can fix that with a layer of indirection:
>
> template SomeDocument(Options...)
> {
>   alias SomeDocument = SomeDocumentImpl!(OptionsOf!(DocumentParams,
> Options));
> }