memcpy() comparison: C, Rust, and D

[Walter Bright via Digitalmars-d]

On 1/31/2017 2:44 AM, Nordlöw wrote:
> On Tuesday, 31 January 2017 at 10:20:59 UTC, Olivier FAURE wrote:
>> I thought it meant "the parameter can be returned" not "the parameter *will*
>> be returned".
>
> And what about multiple `return`-qualified function parameters?

'return' means treat the return value "as if" it was derived from that 
parameter. If multiple parameters are marked as 'return', treat the return value 
as if it was derived from one of them.

This "as if" thing enables the designer of a function API to set the desired 
relationships even if the implementation is doing some deviated preversion with 
the data (i.e. a ref counted object).