AMDG On 12/23/2017 02:25 PM, Robert Ramey via Boost wrote:
On 12/23/17 10:49 AM, Steven Watanabe via Boost wrote:
(We really want the format to be memorialised for all time, regardless of future changes to the test system). It should be pretty simple to set up for portable archive formats.
Right. I'm not even sure it could be done for binary archives given the evolution in compilers/libraries etc.
Actually, I think you could make it work, if you make the key a list of the sizes of all known built in types + various standard typedefs (size_t, ptrdiff_t, streamsize). New toolchains that change any of this will automatically go into a new bin. We can at least guarantee that the archives are readable between ABI compatible toolchains (which is the most that we can reasonably expect for binary archives).
The main problem that I see is sorting out which binary archive is for the current platform.
since binary archives are not likely to be used for longer term storage, the problem would/could be ignored for this case. Of course someone would raise the issue about using serialization to pass data on the wire between different versions of the application.
This is all quite interesting. But I'm inclined to just accept the fact that I/we can't solve every problem. The number of cases that this problem has actually occurred is pretty small, especially when
Since I burned myself on this in a bad way in may 2010, the number of cases that this problem has actually occurred is very, very small. Somehow I'm thinking that it won't happen to Mr. King again at least.
In Christ, Steven Watanabe