refactor(3p/nix): Apply clang-tidy's performance-* fixes r/789

This applies the performance fixes listed here:

https://clang.llvm.org/extra/clang-tidy/checks/list.html

1 files changed, 5 insertions, 5 deletions

diff --git a/third_party/nix/src/libstore/machines.hh b/third_party/nix/src/libstore/machines.hh
index a5013fe4f151..aef8054c250e 100644
--- a/third_party/nix/src/libstore/machines.hh
+++ b/third_party/nix/src/libstore/machines.hh
@@ -19,12 +19,12 @@ struct Machine {
 
   bool mandatoryMet(const std::set<string>& features) const;
 
-  Machine(decltype(storeUri) storeUri, decltype(systemTypes) systemTypes,
-          decltype(sshKey) sshKey, decltype(maxJobs) maxJobs,
+  Machine(decltype(storeUri)& storeUri, decltype(systemTypes)& systemTypes,
+          decltype(sshKey)& sshKey, decltype(maxJobs) maxJobs,
           decltype(speedFactor) speedFactor,
-          decltype(supportedFeatures) supportedFeatures,
-          decltype(mandatoryFeatures) mandatoryFeatures,
-          decltype(sshPublicHostKey) sshPublicHostKey);
+          decltype(supportedFeatures)& supportedFeatures,
+          decltype(mandatoryFeatures)& mandatoryFeatures,
+          decltype(sshPublicHostKey)& sshPublicHostKey);
 };
 
 typedef std::vector<Machine> Machines;