1 files changed, 113 insertions, 0 deletions
diff --git a/Source/cmGeneratorExpressionEvaluator.h b/Source/cmGeneratorExpressionEvaluator.h
new file mode 100644
index 0000000..92dac79
--- /dev/null
+++ b/Source/cmGeneratorExpressionEvaluator.h
@@ -0,0 +1,113 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmGeneratorExpressionEvaluator_h
+#define cmGeneratorExpressionEvaluator_h
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include <stddef.h>
+#include <string>
+#include <vector>
+
+struct cmGeneratorExpressionContext;
+struct cmGeneratorExpressionDAGChecker;
+struct cmGeneratorExpressionNode;
+
+struct cmGeneratorExpressionEvaluator
+{
+  cmGeneratorExpressionEvaluator() {}
+  virtual ~cmGeneratorExpressionEvaluator() {}
+
+  enum Type
+  {
+    Text,
+    Generator
+  };
+
+  virtual Type GetType() const = 0;
+
+  virtual std::string Evaluate(cmGeneratorExpressionContext* context,
+                               cmGeneratorExpressionDAGChecker*) const = 0;
+
+private:
+  CM_DISABLE_COPY(cmGeneratorExpressionEvaluator)
+};
+
+struct TextContent : public cmGeneratorExpressionEvaluator
+{
+  TextContent(const char* start, size_t length)
+    : Content(start)
+    , Length(length)
+  {
+  }
+
+  std::string Evaluate(cmGeneratorExpressionContext*,
+                       cmGeneratorExpressionDAGChecker*) const override
+  {
+    return std::string(this->Content, this->Length);
+  }
+
+  Type GetType() const override
+  {
+    return cmGeneratorExpressionEvaluator::Text;
+  }
+
+  void Extend(size_t length) { this->Length += length; }
+
+  size_t GetLength() { return this->Length; }
+
+private:
+  const char* Content;
+  size_t Length;
+};
+
+struct GeneratorExpressionContent : public cmGeneratorExpressionEvaluator
+{
+  GeneratorExpressionContent(const char* startContent, size_t length);
+  void SetIdentifier(
+    std::vector<cmGeneratorExpressionEvaluator*> const& identifier)
+  {
+    this->IdentifierChildren = identifier;
+  }
+
+  void SetParameters(
+    std::vector<std::vector<cmGeneratorExpressionEvaluator*>> const&
+      parameters)
+  {
+    this->ParamChildren = parameters;
+  }
+
+  Type GetType() const override
+  {
+    return cmGeneratorExpressionEvaluator::Generator;
+  }
+
+  std::string Evaluate(cmGeneratorExpressionContext* context,
+                       cmGeneratorExpressionDAGChecker*) const override;
+
+  std::string GetOriginalExpression() const;
+
+  ~GeneratorExpressionContent() override;
+
+private:
+  std::string EvaluateParameters(const cmGeneratorExpressionNode* node,
+                                 const std::string& identifier,
+                                 cmGeneratorExpressionContext* context,
+                                 cmGeneratorExpressionDAGChecker* dagChecker,
+                                 std::vector<std::string>& parameters) const;
+
+  std::string ProcessArbitraryContent(
+    const cmGeneratorExpressionNode* node, const std::string& identifier,
+    cmGeneratorExpressionContext* context,
+    cmGeneratorExpressionDAGChecker* dagChecker,
+    std::vector<std::vector<cmGeneratorExpressionEvaluator*>>::const_iterator
+      pit) const;
+
+private:
+  std::vector<cmGeneratorExpressionEvaluator*> IdentifierChildren;
+  std::vector<std::vector<cmGeneratorExpressionEvaluator*>> ParamChildren;
+  const char* StartContent;
+  size_t ContentLength;
+};
+
+#endif