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chore(3p/nix): don't optional-wrap EvalState::file_access_trace_fn further

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std::function has a natural null we can't eliminate anyway, so this was
effectively std::optional<std::optional<non_nullable_function>>.

Change-Id: If99f139146021edb25d133dad7f0f6e125ef53df
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1688
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: glittershark <grfn@gws.fyi>
This commit is contained in:
edef 2020-08-07 15:27:27 +00:00
parent 7db734afad
commit 3049f31d28
2 changed files with 3 additions and 4 deletions
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3
third_party/nix/src/libexpr/eval.hh vendored
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@ -303,8 +303,7 @@ class EvalState : public gc {
bool countCalls;
std::optional<std::function<void(const Path&)>> file_access_trace_fn =
std::nullopt;
std::function<void(const Path&)> file_access_trace_fn = nullptr;
Path last_traced_file = "";
typedef std::map<Symbol, size_t> PrimOpCalls;