runtime/Completion.h

   1 /*
   2  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2003, 2007 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Library General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Library General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Library General Public License
  17  *  along with this library; see the file COPYING.LIB.  If not, write to
  18  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifndef Completion_h
  24 #define Completion_h
  25
  26 #include "JSValue.h"
  27
  28 namespace JSC {
  29
  30     class ExecState;
  31     class ScopeChain;
  32     class SourceCode;
  33
  34     enum ComplType { Normal, Break, Continue, ReturnValue, Throw, Interrupted };
  35
  36     /*
  37      * Completion objects are used to convey the return status and value
  38      * from functions.
  39      */
  40     class Completion {
  41     public:
  42         Completion(ComplType type = Normal, JSValue value = JSValue())
  43             : m_type(type)
  44             , m_value(value)
  45         {
  46         }
  47
  48         ComplType complType() const { return m_type; }
  49         JSValue value() const { return m_value; }
  50         void setValue(JSValue v) { m_value = v; }
  51         bool isValueCompletion() const { return m_value; }
  52
  53     private:
  54         ComplType m_type;
  55         JSValue m_value;
  56     };
  57
  58     Completion checkSyntax(ExecState*, const SourceCode&);
  59     Completion evaluate(ExecState*, ScopeChain&, const SourceCode&, JSValue thisValue = JSValue());
  60
  61 } // namespace JSC
  62
  63 #endif // Completion_h