Associative arrays

[Steven Schveighoffer]

On 5/18/21 5:34 AM, Chris Piker wrote:
> On Tuesday, 18 May 2021 at 08:54:00 UTC, Mathias LANG wrote:
> 
> Thanks for the description, that was informative :)
> 
>> The following doesn't even compile:
>> ```
>> void main () nothrow
>> {
>>     int[int] aa;
>>     foreach (k, v; aa) {}
>> }
>> ```
> 
> So basically I can use AAs, so long as I don't put them in critical 
> software since they are always going to throw.  No trouble, I can live 
> with that, it's good to know that up front.
> 

No, that's the wrong way to look at it.

`foreach(k, v; aa)` isn't nothrow, because it accepts an opApply-style 
delegate. This is a language limitation, not a promise that they will 
throw in some cases.

`foreach(kv; aa.byKeyValue)` is nothrow, (where kv.key and kv.value are 
used to access the data), because it uses the range interface to foreach.

-Steve