Merge topic 'reduce-string-copying'

2c2bb5f5 Remove unnecessary operator<< usage
1e4e2f99 Remove unused variables
25486156 Improved checking for number of arguments passed
86dc86dd Add const-reference qualifications
76bdb407 Change std::basic_string<char> to std::string

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !886

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmVariableRequiresCommand.cxx b/Source/cmVariableRequiresCommand.cxx
index 10b0a88..06ca53c 100644
--- a/Source/cmVariableRequiresCommand.cxx
+++ b/Source/cmVariableRequiresCommand.cxx
@@ -17,11 +17,11 @@ bool cmVariableRequiresCommand::InitialPass(
     return false;
   }
 
-  std::string testVariable = args[0];
+  std::string const& testVariable = args[0];
   if (!this->Makefile->IsOn(testVariable)) {
     return true;
   }
-  std::string resultVariable = args[1];
+  std::string const& resultVariable = args[1];
   bool requirementsMet = true;
   std::string notSet;
   bool hasAdvanced = false;