LRU cache for ~=

[Andrei Alexandrescu]

Rainer Deyke wrote:
> Andrei Alexandrescu wrote:
>> One surprising (but safe) behavior that remains with slices is this:
>>
>> void fun(int[] a) {
>>    a[0] = 0;
>>    a ~= 42;
>>    a[0] = 42;
>> }
>>
>> The caller may or may not see 42 in the first slot after the call.
> 
> Your definition of "safe" is clearly not aligned with mine.
> 
> 

What's yours?

Andrei