1 files changed, 53 insertions, 0 deletions
diff --git a/build2/version/rule.hxx b/build2/version/rule.hxx
new file mode 100644
index 0000000..e686694
--- /dev/null
+++ b/build2/version/rule.hxx
@@ -0,0 +1,53 @@
+// file      : build2/version/rule.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef BUILD2_VERSION_RULE_HXX
+#define BUILD2_VERSION_RULE_HXX
+
+#include <build2/types.hxx>
+#include <build2/utility.hxx>
+
+#include <build2/rule.hxx>
+
+namespace build2
+{
+  namespace version
+  {
+    // Generate a version file.
+    //
+    class version_doc: public rule
+    {
+    public:
+      version_doc () {}
+
+      virtual match_result
+      match (action, target&, const string&) const override;
+
+      virtual recipe
+      apply (action, target&) const override;
+
+      static target_state
+      perform_update (action, const target&);
+    };
+
+    // Preprocess an .in file.
+    //
+    class version_in: public rule
+    {
+    public:
+      version_in () {}
+
+      virtual match_result
+      match (action, target&, const string&) const override;
+
+      virtual recipe
+      apply (action, target&) const override;
+
+      static target_state
+      perform_update (action, const target&);
+    };
+  }
+}
+
+#endif // BUILD2_VERSION_RULE_HXX