style(3p/nix): Remove 'using std::*' from types.hh r/840

It is considered bad form to use things from includes in headers, as
these directives propagate to everywhere else and can make it
confusing.

types.hh (which is includes almost literally everywhere) had some of
these directives, which this commit removes.

1 files changed, 2 insertions, 2 deletions

diff --git a/third_party/nix/src/nix/command.hh b/third_party/nix/src/nix/command.hh
index 4122bdd0e5..c297bfbd38 100644
--- a/third_party/nix/src/nix/command.hh
+++ b/third_party/nix/src/nix/command.hh
@@ -27,7 +27,7 @@ struct Command : virtual Args {
 
   virtual Examples examples() { return Examples(); }
 
-  void printHelp(const string& programName, std::ostream& out) override;
+  void printHelp(const std::string& programName, std::ostream& out) override;
 };
 
 class Store;
@@ -151,7 +151,7 @@ class MultiCommand : virtual Args {
 
   MultiCommand(Commands commands);
 
-  void printHelp(const string& programName, std::ostream& out) override;
+  void printHelp(const std::string& programName, std::ostream& out) override;
 
   bool processFlag(Strings::iterator& pos, Strings::iterator end) override;