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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
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