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-rw-r--r--dom/xslt/xpath/txXPathOptimizer.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txXPathOptimizer.h b/dom/xslt/xpath/txXPathOptimizer.h
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+++ b/dom/xslt/xpath/txXPathOptimizer.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef txXPathOptimizer_h__
+#define txXPathOptimizer_h__
+
+#include "txCore.h"
+
+class Expr;
+
+class txXPathOptimizer
+{
+public:
+ /**
+ * Optimize the given expression.
+ * @param aInExpr Expression to optimize.
+ * @param aOutExpr Resulting expression, null if optimization didn't
+ * result in a new expression.
+ */
+ nsresult optimize(Expr* aInExpr, Expr** aOutExpr);
+
+private:
+ // Helper methods for optimizing specific classes
+ nsresult optimizeStep(Expr* aInExpr, Expr** aOutExpr);
+ nsresult optimizePath(Expr* aInExpr, Expr** aOutExpr);
+ nsresult optimizeUnion(Expr* aInExpr, Expr** aOutExpr);
+};
+
+#endif