1 files changed, 58 insertions, 0 deletions
diff --git a/Source/cmGeneratorExpression.h b/Source/cmGeneratorExpression.h
new file mode 100644
index 000000000..1a9d4c6e9
--- /dev/null
+++ b/Source/cmGeneratorExpression.h
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+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#include "cmStandardIncludes.h"
+
+#include <stack>
+
+#include <cmsys/RegularExpression.hxx>
+
+class cmTarget;
+class cmMakefile;
+class cmListFileBacktrace;
+
+/** \class cmGeneratorExpression
+ * \brief Evaluate generate-time query expression syntax.
+ *
+ * cmGeneratorExpression instances are used by build system generator
+ * implementations to evaluate the $<> generator expression syntax.
+ * Generator expressions are evaluated just before the generate step
+ * writes strings into the build system.  They have knowledge of the
+ * build configuration which is not available at configure time.
+ */
+class cmGeneratorExpression
+{
+public:
+  /** Construct with an evaluation context and configuration.  */
+  cmGeneratorExpression(cmMakefile* mf, const char* config,
+                        cmListFileBacktrace const& backtrace,
+                        bool quiet = false);
+
+  /** Evaluate generator expressions in a string.  */
+  const char* Process(std::string const& input);
+  const char* Process(const char* input);
+
+  /** Get set of targets found during evaluations.  */
+  std::set<cmTarget*> const& GetTargets() const
+    { return this->Targets; }
+private:
+  cmMakefile* Makefile;
+  const char* Config;
+  cmListFileBacktrace const& Backtrace;
+  bool Quiet;
+  std::vector<char> Data;
+  std::stack<size_t> Barriers;
+  cmsys::RegularExpression TargetInfo;
+  std::set<cmTarget*> Targets;
+  bool Evaluate();
+  bool Evaluate(const char* expr, std::string& result);
+  bool EvaluateTargetInfo(std::string& result);
+};