Genex: Add more extensive support for an unbounded number of parameters

Previously genex support for unbounded number of parameters required
at least 1 parameter. We now support zero or more parameters, and two
or more parameters.

1 files changed, 3 insertions, 1 deletions

diff --git a/Source/cmGeneratorExpressionNode.h b/Source/cmGeneratorExpressionNode.h
index 3dbfc6e..7a36924 100644
--- a/Source/cmGeneratorExpressionNode.h
+++ b/Source/cmGeneratorExpressionNode.h
@@ -20,7 +20,9 @@ struct cmGeneratorExpressionNode
   {
     DynamicParameters = 0,
     OneOrMoreParameters = -1,
-    OneOrZeroParameters = -2
+    TwoOrMoreParameters = -2,
+    ZeroOrMoreParameters = -3,
+    OneOrZeroParameters = -4
   };
   virtual ~cmGeneratorExpressionNode() = default;