Re: Example for multi level template composition
On Monday, 10 October 2022 at 06:30:05 UTC, Arun wrote: Stumbled upon this question on HN https://news.ycombinator.com/item?id=33142751#33147401 This guy could have read std.meta's documentation or source, but instead makes assumptions and lazes around.
Re: Example for multi level template composition
On Monday, 10 October 2022 at 06:30:05 UTC, Arun wrote:
Stumbled upon this question on HN
https://news.ycombinator.com/item?id=33142751#33147401
Can I write template A and then apply it to itself to get
template B and then apply that onto template C to get template
D.
Does anyone have an example for this?
You can just write that down in code:
```d
template D() { enum D = "It's me, template D!"; }
template A(alias MyA)
{
template A(alias MyC)
{
alias A = D;
}
}
template C() {}
alias B = A!A;
alias MaybeD = B!C;
pragma(msg, MaybeD!()); /* prints "It's me, template D!" */
```
Re: Example for multi level template composition
On 10/10/22 08:30, Arun via Digitalmars-d-learn wrote: Stumbled upon this question on HN https://news.ycombinator.com/item?id=33142751#33147401 Can I write template A and then apply it to itself to get template B and then apply that onto template C to get template D. Does anyone have an example for this? Aren't UFCS chained range calls just that? range.map!foo.filter!bar.fold!baz; These templates return new template ranges that transform themselves according to their inputs via Design by Introspection. For example, joiner of joiner of joiner would allow you to lazily flatten a multi dim array.
Re: Example for multi level template composition
On Monday, 10 October 2022 at 06:30:05 UTC, Arun wrote: Stumbled upon this question on HN https://news.ycombinator.com/item?id=33142751#33147401 Can I write template A and then apply it to itself to get template B and then apply that onto template C to get template D. Does anyone have an example for this? Recursive templates can make other templates with themselves. I dont feel to provide an example ATM tho.
Example for multi level template composition
Stumbled upon this question on HN https://news.ycombinator.com/item?id=33142751#33147401 Can I write template A and then apply it to itself to get template B and then apply that onto template C to get template D. Does anyone have an example for this?
