Passing a reference to a returned reference

[Michael]

On Friday, 6 July 2018 at 16:24:03 UTC, Timoses wrote:
> On Friday, 6 July 2018 at 15:51:34 UTC, Michael wrote:
>> [...]
> While writing I realized that the following is even the case 
> without the 'ref' parameter:
> The caller of the setter will still be able to change the 
> content of your private data after you checked it for validity. 
> Take following example:
>
> [...]

I understand your warning, but as the array is created purely to 
assign to the agent's beliefs, it only appears in the main() 
function as a rhs reference, which is passed to the agent, the 
reference is stored in the member variable, and then the main 
function continues, holding no reference to that array outside of 
agent's agent.beliefs getter function. Appreciate the heads up, 
though.