Use C++11 override instead of CM_OVERRIDE

We now require C++11 support including `override`.  Drop use of
the old compatibility macro.  Convert references as follows:

    git grep -l CM_OVERRIDE -- '*.h' '*.hxx' '*.cxx' |
      xargs sed -i 's/CM_OVERRIDE/override/g'

1 files changed, 5 insertions, 5 deletions

diff --git a/Source/cmGeneratorExpressionEvaluator.h b/Source/cmGeneratorExpressionEvaluator.h
index cdf89d7..92dac79 100644
--- a/Source/cmGeneratorExpressionEvaluator.h
+++ b/Source/cmGeneratorExpressionEvaluator.h
@@ -42,12 +42,12 @@ struct TextContent : public cmGeneratorExpressionEvaluator
   }
 
   std::string Evaluate(cmGeneratorExpressionContext*,
-                       cmGeneratorExpressionDAGChecker*) const CM_OVERRIDE
+                       cmGeneratorExpressionDAGChecker*) const override
   {
     return std::string(this->Content, this->Length);
   }
 
-  Type GetType() const CM_OVERRIDE
+  Type GetType() const override
   {
     return cmGeneratorExpressionEvaluator::Text;
   }
@@ -77,17 +77,17 @@ struct GeneratorExpressionContent : public cmGeneratorExpressionEvaluator
     this->ParamChildren = parameters;
   }
 
-  Type GetType() const CM_OVERRIDE
+  Type GetType() const override
   {
     return cmGeneratorExpressionEvaluator::Generator;
   }
 
   std::string Evaluate(cmGeneratorExpressionContext* context,
-                       cmGeneratorExpressionDAGChecker*) const CM_OVERRIDE;
+                       cmGeneratorExpressionDAGChecker*) const override;
 
   std::string GetOriginalExpression() const;
 
-  ~GeneratorExpressionContent() CM_OVERRIDE;
+  ~GeneratorExpressionContent() override;
 
 private:
   std::string EvaluateParameters(const cmGeneratorExpressionNode* node,