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authorGriffin Smith <grfn@gws.fyi>2020-07-12T17·13-0400
committerglittershark <grfn@gws.fyi>2020-07-13T23·50+0000
commit98148e671130c93d5c292ab560628eb8b8acee8a (patch)
treebb9862f4e85910395208caedfd50cac09a1f4c9c /.hgignore
parentcc12188d31be955ed9c7f79a1d23c36e73f16c99 (diff)
refactor(3p/nix): Abstract away concrete bindings impl r/1283
To pave the way for the thing we want to do eventually which is use a
linear-time array for bindings (aka attribute sets) that are statically
known to be small enough to get a performance benefit from doing so,
make the Bindings class abstract, and define a BTreeBindings class that
inherits from it and is (currently always) returned from the static
initializer. The idea is that we'll have an ArrayBindings class as well
later that we can dispatch to conditionally based on an optional
"capacity" parameter or something like that.

There was some difficulty here in getting the iterator to work - the
approach we settled on ended up making a concrete BindingsIterator class
which will wrap a std::variant of either a btree iterator or something
else later, but right now just wraps a btree iterator.

Paired-With: Luke Granger-Brown <git@lukegb.com>
Paired-With: Vincent Ambo <mail@tazj.in>
Paired-With: Perry Lorier <isomer@tvl.fyi>
Change-Id: Ie02ca5a1c55e8ebf99ab1e957110bd9284278907
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1121
Tested-by: BuildkiteCI
Reviewed-by: isomer <isomer@tvl.fyi>
Diffstat (limited to '.hgignore')
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