1 files changed, 54 insertions, 0 deletions
diff --git a/Source/cmGeneratorExpressionNode.h b/Source/cmGeneratorExpressionNode.h
new file mode 100644
index 0000000..ecf745e
--- /dev/null
+++ b/Source/cmGeneratorExpressionNode.h
@@ -0,0 +1,54 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmGeneratorExpressionNode_h
+#define cmGeneratorExpressionNode_h
+
+#include <cmConfigure.h> // IWYU pragma: keep
+
+#include <string>
+#include <vector>
+
+class cmGeneratorTarget;
+class cmLocalGenerator;
+struct GeneratorExpressionContent;
+struct cmGeneratorExpressionContext;
+struct cmGeneratorExpressionDAGChecker;
+
+struct cmGeneratorExpressionNode
+{
+  enum
+  {
+    DynamicParameters = 0,
+    OneOrMoreParameters = -1,
+    OneOrZeroParameters = -2
+  };
+  virtual ~cmGeneratorExpressionNode() {}
+
+  virtual bool GeneratesContent() const { return true; }
+
+  virtual bool RequiresLiteralInput() const { return false; }
+
+  virtual bool AcceptsArbitraryContentParameter() const { return false; }
+
+  virtual int NumExpectedParameters() const { return 1; }
+
+  virtual std::string Evaluate(
+    const std::vector<std::string>& parameters,
+    cmGeneratorExpressionContext* context,
+    const GeneratorExpressionContent* content,
+    cmGeneratorExpressionDAGChecker* dagChecker) const = 0;
+
+  static std::string EvaluateDependentExpression(
+    std::string const& prop, cmLocalGenerator* lg,
+    cmGeneratorExpressionContext* context, const cmGeneratorTarget* headTarget,
+    const cmGeneratorTarget* currentTarget,
+    cmGeneratorExpressionDAGChecker* dagChecker);
+
+  static const cmGeneratorExpressionNode* GetNode(
+    const std::string& identifier);
+};
+
+void reportError(cmGeneratorExpressionContext* context,
+                 const std::string& expr, const std::string& result);
+
+#endif