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2020-07-13 r/1277 feat(3p/nix/libutil): Add util::overloaded class for std::visitorVincent Ambo1-0/+19
Implements the fairly common lambda overload class used for std::visit over variants and other things that require groups of callables. Change-Id: Ia7448b7e1bd349b4909974758e6e6303a80d86d7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1137 Tested-by: BuildkiteCI Reviewed-by: glittershark <grfn@gws.fyi> Reviewed-by: edef <edef@edef.eu>