text: /*
     +----------------------------------------------------------------------+
     | HipHop for PHP                                                       |
     +----------------------------------------------------------------------+
     | Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com)         |
     +----------------------------------------------------------------------+
     | This source file is subject to version 3.01 of the PHP license,      |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.php.net/license/3_01.txt                                  |
     | If you did not receive a copy of the PHP license and are unable to   |
     | obtain it through the world-wide-web, please send a note to          |
     | license@php.net so we can mail you a copy immediately.               |
     +----------------------------------------------------------------------+
  */
  
  #ifndef __EVAL_AST_REF_PARAM_EXPRESSION_H__
  #define __EVAL_AST_REF_PARAM_EXPRESSION_H__
  
  #include <runtime/eval/ast/lval_expression.h>
  
  namespace HPHP {
  namespace Eval {
  ///////////////////////////////////////////////////////////////////////////////
  
  DECLARE_AST_PTR(RefParamExpression);
  
  class RefParamExpression : public LvalExpression {
  public:
    RefParamExpression(EXPRESSION_ARGS, LvalExpressionPtr lv);
    virtual Variant &lval(VariableEnvironment &env) const;
    virtual bool weakLval(VariableEnvironment &env, Variant* &v) const;
    virtual Variant refval(VariableEnvironment &env, int strict = 2) const;
    virtual Variant set(VariableEnvironment &env, CVarRef val) const;
    virtual Variant setOp(VariableEnvironment &env, int op, CVarRef rhs) const;
    virtual void unset(VariableEnvironment &env) const;
    virtual void dump(std::ostream &out) const;
    virtual bool isRefParam() const;
  private:
    LvalExpressionPtr m_lv;
  };
  
  ///////////////////////////////////////////////////////////////////////////////
  }
  }
  
  #endif /* __EVAL_AST_REF_PARAM_EXPRESSION_H__ */
  