What's the deal with "Warning: explicit element-wise assignment..."

[via Digitalmars-d]

On Wednesday, 30 April 2014 at 15:45:32 UTC, Andrei Alexandrescu 
wrote:
>> The name should indicate what you get (the calculating of a 
>> result), not
>> how the framework obtains it (sequential scan).
>
> Making complexity an implementation detail is an antipattern. 
> -- Andrei

Where did I say that?