std.collection - changing the collection while iterating

[Andrei Alexandrescu via Digitalmars-d]

On 6/21/15 7:31 PM, Steven Schveighoffer wrote:
> On 6/21/15 7:02 PM, Andrei Alexandrescu wrote:
>> While I work on making std.allocator better, here's some food for
>> thought regarding std.collection.
>>
>> Consider a traditional container with reference semantics, Java-style.
>> Regarding changing the collection (e.g. adding/removing elements) while
>> iterating, we have the following possibilities:
>>
>> 1. Leave it undefined, like the STL does. Probably this is too extreme.
>
> I don't think it's undefined, it depends on the container:
>
> http://www.cplusplus.com/reference/set/set/erase/
>
> "Iterators, pointers and references referring to elements removed by the
> function are invalidated. All other iterators, pointers and references
> keep their validity."

"Invalidated" = undefined. The point is to make it a hard error when 
trying to use an invalidated range. -- Andrei