container stuff

[Walter Bright]

Andrei Alexandrescu wrote:
> On 05/25/2010 08:31 PM, Walter Bright wrote:
>> Andrei Alexandrescu wrote:
>>> On 05/25/2010 07:35 PM, Walter Bright wrote:
>>>> Andrei Alexandrescu wrote:
>>>>> I've uploaded a work in progress on the container design here:
>>>>
>>>> Great! Some nitpicky comments:
>>>>
>>>> 1. What's the difference between a value and an element?
>>>
>>> None.
>>
>> Then I suggest sticking with one or the other throughout the spec. Also,
>> there's both an ElementType and a ValueType.
> 
> Sorry, I was wrong. ValueType is defined for keyed containers to mean 
> the mapped type. Should I call it MappedType?

Can a container have different ElementTypes from ValueTypes?