1 files changed, 14 insertions, 0 deletions
diff --git a/pkg/ast/filter.go b/pkg/ast/filter.go
new file mode 100644
index 000000000..a36114e82
--- /dev/null
+++ b/pkg/ast/filter.go
@@ -0,0 +1,14 @@
+// Copyright 2018 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package ast
+
+func (desc *Description) Filter(predicate func(Node) bool) *Description {
+	desc1 := &Description{}
+	for _, n := range desc.Nodes {
+		if predicate(n) {
+			desc1.Nodes = append(desc1.Nodes, n.Clone())
+		}
+	}
+	return desc1
+}