Re: [boost] variant2 never empty guarantees

2017-06-09 8:09 GMT+02:00 degski via Boost :

On 9 June 2017 at 02:05, Gavin Lambert via Boost wrote:

...

... since assignment is not really expected to throw for any reason other than out of memory.

Are there really any modernish OSes that *do* run out of memory? Stack space (on those type of machines) maybe, but now we are talking programming error, I would say, because that situation is foreseeable (and should be expected) by the programmer. From what I understand, if one is programming for embedded systems or iot-devices, dynamic allocation is not the common way to do things and all memory required is allocated upon boot.

When you are implementing a "cache": you want to store the most "hot" part of your database data in RAM on a dedicated server, which obviously cannot cache the entire database. You have to make some predictions, how much data you can accept. If the actual data is bigger, you probably want to terminate with apologize message. Regards, &rzej;