txXPathOptimizer.h (924B)
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #ifndef txXPathOptimizer_h__ 7 #define txXPathOptimizer_h__ 8 9 #include "txCore.h" 10 11 class Expr; 12 13 class txXPathOptimizer { 14 public: 15 /** 16 * Optimize the given expression. 17 * @param aInExpr Expression to optimize. 18 * @param aOutExpr Resulting expression, null if optimization didn't 19 * result in a new expression. 20 */ 21 void optimize(Expr* aInExpr, Expr** aOutExpr); 22 23 private: 24 // Helper methods for optimizing specific classes 25 void optimizeStep(Expr* aInExpr, Expr** aOutExpr); 26 void optimizePath(Expr* aInExpr, Expr** aOutExpr); 27 void optimizeUnion(Expr* aInExpr, Expr** aOutExpr); 28 }; 29 30 #endif