Add a generator expression for target properties.

There are two overloads, so that it can use the operational
target when a target property is being evaluated, and a target
can alternatively be specified by name.

At this point, the generators don't chain. That comes later.

1 files changed, 6 insertions, 1 deletions

diff --git a/Source/cmGeneratorExpressionEvaluator.h b/Source/cmGeneratorExpressionEvaluator.h
index 5163ca002d..4086e8e2ac 100644
--- a/Source/cmGeneratorExpressionEvaluator.h
+++ b/Source/cmGeneratorExpressionEvaluator.h
@@ -15,6 +15,11 @@
 #include <vector>
 #include <string>
 
+#include "cmListFileCache.h"
+
+class cmTarget;
+class cmGeneratorTarget;
+
 //----------------------------------------------------------------------------
 struct cmGeneratorExpressionContext
 {
@@ -22,7 +27,7 @@ struct cmGeneratorExpressionContext
   std::set<cmTarget*> Targets;
   cmMakefile *Makefile;
   const char *Config;
-  cmTarget *Target;
+  cmGeneratorTarget *Target;
   bool Quiet;
   bool HadError;
 };