On Saturday, 23 June 2018 at 01:58:31 UTC, DigitalDesigns wrote:
Is there any idiomatic undo designs in D that give a more
natural implementation than the standard techniques?
There is the solution above, but there I've implemented something
similar in Diamond.
It's a little bit different concept since it's based on
"snapshot" types which basically is a type that keeps snapshots
of its values and thus you can change the state of it.
They're used for transactions within Diamond, which could
show-case how to use them.
http://diamondmvc.org/docs/data/#transactions
But a quick example would be from the docs:
```
import diamond.data;
auto value = new Snapshot!int;
value = 100;
value = 200;
value = 300;
value = 400;
import std.stdio : writefln;
writefln("%d %d %d %d %d", value[0], value[1], value[2],
value[3], value);
// Prints: 100 200 300 400 400
```
For more information also see:
http://diamond.dpldocs.info/diamond.data.snapshot.Snapshot.html
