Bitblob (hash wrapper) & Minivariant (tagged union) dub packages
snarwin at gmail.com
Tue Jan 22 18:09:16 UTC 2019
On Tuesday, 22 January 2019 at 10:26:33 UTC, Mathias Lang wrote:
> ## Minivariant
> Minivariant is a "works for me" replacement of `std.variant :
> I looked into fixing it, but given Variant's design (which
> relies heavily on `TypeInfo`) it would have been a wild goose
> chase. And I know I'm not the only one that needed his own
> tagged union (see e.g.
> https://github.com/s-ludwig/taggedalgebraic). It also has a
> `visit` method similar to std.variant, although not with
> delegates, as there is currently no way to merge delegates into
> an overload set, so you have to use an existing overload set
> (see the examples).
I've also been through this exact process. The resulting package
is on dub as `sumtype` . In addition to solving the problem
you noticed with `immutable`, it also works with @safe, @nogc,
pure, and nothrow, and supports both delegates and overload sets
with its `match` method (the equivalent of `visit`).
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