From b5083221dad8084deb4a7949cb9fc487aa09e080 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 16 Nov 2021 10:46:19 +0200
Subject: WIP: apply/perform_update

---
 libbuild2/dynamic.hxx | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 libbuild2/dynamic.hxx

(limited to 'libbuild2/dynamic.hxx')

diff --git a/libbuild2/dynamic.hxx b/libbuild2/dynamic.hxx
new file mode 100644
index 0000000..395a839
--- /dev/null
+++ b/libbuild2/dynamic.hxx
@@ -0,0 +1,33 @@
+// file      : libbuild2/dynamic.hxx -*- C++ -*-
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_DYNAMIC_HXX
+#define LIBBUILD2_DYNAMIC_HXX
+
+#include <libbuild2/types.hxx>
+#include <libbuild2/forward.hxx>
+#include <libbuild2/utility.hxx>
+
+#include <libbuild2/action.hxx>
+#include <libbuild2/target.hxx>
+
+#include <libbuild2/export.hxx>
+
+// Additional functionality that is normally only useful for implementing
+// rules with dynamic dependencies.
+//
+namespace build2
+{
+  class LIBBUILD2_SYMEXPORT dyndep_rule
+  {
+  public:
+    // Update the target during the match phase. Return true if it has changed
+    // or if the passed timestamp is not timestamp_unknown and is older than
+    // the target.
+    //
+    static bool
+    update (tracer&, action, const target&, timestamp);
+  };
+}
+
+#endif // LIBBUILD2_DYNAMIC_HXX
-- 
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