[OT] Re: DIP 1027---String Interpolation---Format Assessment

jmh530 john.michael.hall at gmail.com
Thu Feb 27 15:54:56 UTC 2020

On Thursday, 27 February 2020 at 15:11:07 UTC, Steven 
Schveighoffer wrote:
> [snip]
> We're going very off topic here, but I wanted to address this.
> Large hidden invisible types are not the problem (look at 
> normal dynamic arrays, the large hidden type built into the 
> runtime is a huge success I think). The problem is that the 
> compiler gives special features to such types.
> In the case of AA, the ONLY missing piece that cannot be 
> implemented by user types is this:
> int[string][string] aalist;
> aalist["hello"]["world"] = 5;
> [snip]

Thanks for writing that. I spent a few minutes reading about 
autovivification and was a little unsure of what the problem was 
as D's operator overloading is pretty flexible. However, I don't 
think I've ever used or seen used multi-dimensional associative 
arrays. It looks as if you cannot make use of aalist["hello", 
"world"] and have to use it like aalist["hello"]["world"].

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