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author | Vincent Ambo <mail@tazj.in> | 2020-07-18T15·40+0100 |
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committer | tazjin <mail@tazj.in> | 2020-07-18T18·08+0000 |
commit | cdc1a0bb6ec52cd05c1a72c00c3c3a4f716a429a (patch) | |
tree | 678d1c8586bc82a3476e581b1cca6810d072e115 /bin/terraform | |
parent | 56614c75e4a187c34706af718d9d8d69685c41b2 (diff) |
refactor(3p/nix/libexpr): Back Nix lists with std::vector r/1377
This change does away with the previous special-casing of lists of certain element sizes, and the use of raw C-style arrays. Lists are now backed by a std::vector of nix::Value*, which uses the traceable GC allocator. This change is unfortunately quite noisy because the accessor methods were updated/removed accordingly, so all callsites of Nix-related lists have changed. For some operations in primops.cc where keeping the previous code structure would have been more difficult with a "proper" vector, the implementation has been replaced with std::vector methods. For example, list concatenation now uses appropriate range inserts. Anecdotally the performance of this is about equal, to even slightly better, than the previous implementation. All language tests pass and the depot paths I've used for testing still evaluate. Change-Id: Ib5eca6c0207429cb323a330c838c3a2200b2c693 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1266 Tested-by: BuildkiteCI Reviewed-by: isomer <isomer@tvl.fyi> Reviewed-by: Kane York <rikingcoding@gmail.com> Reviewed-by: glittershark <grfn@gws.fyi>
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