Re: Compare boost::hana to D

[Steven Schveighoffer via Digitalmars-d]

On 4/23/17 12:22 AM, Jesse Phillips wrote:
On Friday, 21 April 2017 at 13:10:43 UTC, Adam D. Ruppe wrote:
On Wednesday, 19 April 2017 at 18:02:46 UTC, Adrian Matoga wrote:
[2] https://epi.github.io/2017/03/18/less_fun.html

BTW in your D foreach, you could also have done `switch`

  void trigger(string event) {
    switch(event) {
      foreach (i, e; events) {
        case e:
          foreach (c; callbacks_[i])
            c();
          return;
      }
      default:
           assert(false, "trying to trigger an unknown event: " ~ event);
    }
  }


And the compiler+runtime can optimize that into a binary search when
it gets larger automatically.

Doesn't the latest compiler complain with a depreciation that i/e
initialization is being skipped?

Yep, but it's just a warning. A really annoying warning. 
https://issues.dlang.org/show_bug.cgi?id=16521 has more details. static 
foreach + switch can be bad if you ref the elements of the tuple. The 
"correct" thing to do is:

foreach(i, _unused; someTuple)
{
    // use someTuple[i] instead of _unused
}

You will still get the warning though.

-Steve