hphp/compiler/expression/binary_op_expression.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com)     |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #ifndef incl_HPHP_BINARY_OP_EXPRESSION_H_
  18 #define incl_HPHP_BINARY_OP_EXPRESSION_H_
  19
  20 #include "hphp/compiler/expression/expression_list.h"
  21
  22 namespace HPHP {
  23 ///////////////////////////////////////////////////////////////////////////////
  24
  25 DECLARE_BOOST_TYPES(BinaryOpExpression);
  26
  27 class BinaryOpExpression : public Expression {
  28 public:
  29   BinaryOpExpression(EXPRESSION_CONSTRUCTOR_PARAMETERS,
  30                      ExpressionPtr exp1, ExpressionPtr exp2, int op);
  31
  32   DECLARE_EXPRESSION_VIRTUAL_FUNCTIONS;
  33   ExpressionPtr preOptimize(AnalysisResultConstPtr ar);
  34   ExpressionPtr postOptimize(AnalysisResultConstPtr ar);
  35   virtual bool isTemporary() const;
  36   virtual int getLocalEffects() const;
  37   virtual bool isLiteralString() const;
  38   virtual std::string getLiteralString() const;
  39   virtual bool containsDynamicConstant(AnalysisResultPtr ar) const;
  40
  41   virtual bool isRefable(bool checkError = false) const;
  42   bool isShortCircuitOperator() const;
  43   bool isLogicalOrOperator() const;
  44   ExpressionPtr getStoreVariable() const { return m_exp1;}
  45   ExpressionPtr getExp1() { return m_exp1;}
  46   ExpressionPtr getExp2() { return m_exp2;}
  47   int getOp() const { return m_op;}
  48
  49   ExpressionPtr foldConst(AnalysisResultConstPtr ar);
  50   ExpressionPtr foldRightAssoc(AnalysisResultConstPtr ar);
  51
  52   virtual ExpressionPtr unneededHelper();
  53   virtual bool canonCompare(ExpressionPtr e) const;
  54
  55   static int getConcatList(ExpressionPtrVec &ev, ExpressionPtr exp,
  56                            bool &hasVoid);
  57   bool isAssignmentOp() const { return m_assign; }
  58
  59 private:
  60   void optimizeTypes(AnalysisResultConstPtr ar);
  61   ExpressionPtr simplifyLogical(AnalysisResultConstPtr ar);
  62   ExpressionPtr simplifyArithmetic(AnalysisResultConstPtr ar);
  63   bool isOpEqual();
  64   ExpressionPtr m_exp1;
  65   ExpressionPtr m_exp2;
  66   int m_op;
  67   bool m_assign;
  68   mutable bool m_canThrow;
  69 };
  70
  71 ///////////////////////////////////////////////////////////////////////////////
  72 }
  73
  74 #endif // incl_HPHP_BINARY_OP_EXPRESSION_H_