Idiomatic way to generate all possible values a static array of ubyte can have

[Steven Schveighoffer via Digitalmars-d-learn]

On 4/2/16 5:47 AM, jkpl wrote:
> gives: core.exception.OutOfMemoryError at src/core/exception.d(693): Memory
> allocation failed
>
>
>
Probably because randomCover needs to allocate a bool for all the 
elements it has already covered, so you are allocating 32 * 4G bools. 
How much RAM do you have? Note that D's GC is conservative, so false 
pointers, especially for large arrays also can cause problems.

I'll note that even if it worked, this code will never complete in your 
lifetime, or even your great great grandchild's lifetime. I don't 
understand the point of doing this.

I'll also note that if you just want to test a *subset* of all the 
possible inputs (given the length of time taken to test all these), you 
probably want to change different elements each time through the loop. 
Your code spends a long time testing the same elements in the first 
slots. Given your test code is just looking at the first element, this 
isn't very good test coverage.

I honestly think you are better off just generating random arrays, even 
if it results in some overlap (unlikely to be relevant).

-Steve