SrgsElementFactoryCompiler.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Internal / SrgsCompiler / SrgsElementFactoryCompiler.cs / 1 / SrgsElementFactoryCompiler.cs

                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: 
//
// History: 
//		5/1/2004	jeanfp		Created from the Kurosawa Code
//---------------------------------------------------------------------------

#region Using directives 

using System; 
using System.Collections.Generic; 
using System.Globalization;
using System.Text; 
using System.Speech.Internal.SrgsParser;

#endregion
 
#pragma warning disable 1634, 1691 // Allows suppression of certain PreSharp messages.
 
namespace System.Speech.Internal.SrgsCompiler 
{
    internal class SrgsElementCompilerFactory : IElementFactory 
    {

        //*******************************************************************
        // 
        // Constructors
        // 
        //******************************************************************* 

        #region Constructors 

#if !NO_STG
        internal SrgsElementCompilerFactory (Backend backend, CustomGrammar cg)
        { 
            _backend = backend;
            _cg = cg; 
            _grammar = new GrammarElement (backend, cg); 
        }
#else 
        internal SrgsElementCompilerFactory (Backend backend)
        {
            _backend = backend;
            _grammar = new GrammarElement (backend); 
        }
#endif 
        #endregion 

        //******************************************************************** 
        //
        // Internal Methods
        //
        //******************************************************************* 

        #region Internal Methods 
 
        /// 
        /// Clear all the rules 
        /// 
        void IElementFactory.RemoveAllRules ()
        {
        } 

        IPropertyTag IElementFactory.CreatePropertyTag (IElement parent) 
        { 
            return new PropertyTag ((ParseElementCollection) parent, _backend);
        } 

        ISemanticTag IElementFactory.CreateSemanticTag (IElement parent)
        {
            return new SemanticTag ((ParseElementCollection) parent, _backend); 
        }
 
        IElementText IElementFactory.CreateText (IElement parent, string value) 
        {
            return null; 
        }

        IToken IElementFactory.CreateToken (IElement parent, string content, string pronunciation, string display, float reqConfidence)
        { 
            ParseToken ((ParseElementCollection) parent, content, pronunciation, display, reqConfidence);
            return null; 
        } 

        IItem IElementFactory.CreateItem (IElement parent, IRule rule, int minRepeat, int maxRepeat, float repeatProbability, float weight) 
        {
            return (IItem) new Item (_backend, (Rule) rule, minRepeat, maxRepeat, repeatProbability, weight);
        }
 
        IRuleRef IElementFactory.CreateRuleRef (IElement parent, Uri srgsUri)
        { 
            throw new NotImplementedException (); 
        }
 
        IRuleRef IElementFactory.CreateRuleRef (IElement parent, Uri srgsUri, string semanticKey, string parameters)
        {
            return new RuleRef ((ParseElementCollection) parent, _backend, srgsUri, _grammar.UndefRules, semanticKey, parameters);
        } 

        void IElementFactory.InitSpecialRuleRef (IElement parent, IRuleRef specialRule) 
        { 
            ((RuleRef) specialRule).InitSpecialRuleRef (_backend, (ParseElementCollection) parent);
        } 

        IOneOf IElementFactory.CreateOneOf (IElement parent, IRule rule)
        {
            return (IOneOf) new OneOf ((Rule) rule, _backend); 
        }
 
        ISubset IElementFactory.CreateSubset (IElement parent, string text, MatchMode mode) 
        {
            return (ISubset) new Subset ((ParseElementCollection) parent, _backend, text, mode); 
        }
#if !NO_STG

        void IElementFactory.AddScript (IGrammar grammar, string rule, string code) 
        {
            ((GrammarElement) grammar).AddScript (rule, code); 
        } 

        string IElementFactory.AddScript (IGrammar grammar, string rule, string code, string filename, int line) 
        {
            // add the #line information
            if (line >= 0)
            { 
                if (_cg._language == "C#")
                { 
                    // C# 
                    return String.Format (CultureInfo.InvariantCulture, "#line {0} \"{1}\"\n{2}", line.ToString (CultureInfo.InvariantCulture), filename, code);
                } 
                else
                {
                    // VB.Net
                    return String.Format (CultureInfo.InvariantCulture, "#ExternalSource (\"{1}\",{0}) \n{2}\n#End ExternalSource\n", line.ToString (CultureInfo.InvariantCulture), filename, code); 
                }
            } 
            return code; 
        }
 
        void IElementFactory.AddScript (IGrammar grammar, string script, string filename, int line)
        {
            // add the #line information
            if (line >= 0) 
            {
                if (_cg._language == "C#") 
                { 
                    // C#
                    _cg._script.Append ("#line "); 
                    _cg._script.Append (line.ToString (CultureInfo.InvariantCulture));
                    _cg._script.Append (" \"");
                    _cg._script.Append (filename);
                    _cg._script.Append ("\"\n"); 
                    _cg._script.Append (script);
                } 
                else 
                {
                    // VB.Net 
                    _cg._script.Append ("#ExternalSource (");
                    _cg._script.Append (" \"");
                    _cg._script.Append (filename);
                    _cg._script.Append ("\","); 
                    _cg._script.Append (line.ToString (CultureInfo.InvariantCulture));
                    _cg._script.Append (")\n"); 
                    _cg._script.Append (script); 
                    _cg._script.Append ("#End #ExternalSource\n");
                } 
            }
            else
            {
                _cg._script.Append (script); 
            }
        } 
 
#endif
 
        void IElementFactory.AddItem (IOneOf oneOf, IItem item)
        {
        }
 
        void IElementFactory.AddElement (IRule rule, IElement value)
        { 
        } 

        void IElementFactory.AddElement (IItem item, IElement value) 
        {
        }

        #endregion 

        //******************************************************************** 
        // 
        // Internal Properties
        // 
        //********************************************************************

        #region Internal Properties
 
        IGrammar IElementFactory.Grammar
        { 
            get 
            {
                return _grammar; 
            }
        }

        IRuleRef IElementFactory.Null 
        {
            get 
            { 
                return RuleRef.Null;
            } 
        }
        IRuleRef IElementFactory.Void
        {
            get 
            {
                return RuleRef.Void; 
            } 
        }
        IRuleRef IElementFactory.Garbage 
        {
            get
            {
                return RuleRef.Garbage; 
            }
        } 
        #endregion 

        //******************************************************************* 
        //
        // Private Methods
        //
        //******************************************************************** 

        #region Private Methods 
 
        // Disable parameter validation check
#pragma warning disable 56507 

        /// 
        /// Add transition representing the normalized token.
        /// 
        /// White Space Normalization - Trim leading/trailing white spaces.
        ///                             Collapse white space sequences to a single ' '. 
        /// Restrictions - Normalized token cannot be empty. 
        ///                Normalized token cannot contain double-quote.
        /// 
        /// If (Parent == Token) And (Parent.SAPIPron.Length > 0) Then
        ///     Escape normalized token.  "/" -> "\/", "\" -> "\\"
        ///     Build /D/L/P; form from the escaped token and SAPIPron.
        /// 
        /// SAPIPron may be a semi-colon delimited list of pronunciations.
        /// In this case, a transition for each of the pronuncitions will be added. 
        /// 
        /// AddTransition(NormalizedToken, Parent.EndState, NewState)
        /// Parent.EndState = NewState 
        /// 
        /// Parent element
        /// Token string
        ///  
        /// 
        ///  
        private void ParseToken (ParseElementCollection parent, string sToken, string pronunciation, string display, float reqConfidence) 
        {
            int requiredConfidence = (parent != null) ? parent._confidence : CfgGrammar.SP_NORMAL_CONFIDENCE; 

            // Performs white space normalization in place
            sToken = Backend.NormalizeTokenWhiteSpace (sToken);
            if (string.IsNullOrEmpty (sToken)) 
            {
                return; 
            } 

            // "sapi:reqconf" Attribute 
            parent._confidence = CfgGrammar.SP_NORMAL_CONFIDENCE;  // Default to normal

            if (reqConfidence < 0 || reqConfidence.Equals (0.5f))
            { 
                parent._confidence = CfgGrammar.SP_NORMAL_CONFIDENCE;  // Default to normal
            } 
            else if (reqConfidence < 0.5) 
            {
                parent._confidence = CfgGrammar.SP_LOW_CONFIDENCE; 
            }
            else
            {
                parent._confidence = CfgGrammar.SP_HIGH_CONFIDENCE; 
            }
 
            // If SAPIPron is specified, use /D/L/P; as the transition text, for each of the pronunciations. 
            if (pronunciation != null || display != null)
            { 
                // Escape normalized token.  "/" -> "\/", "\" -> "\\"
                string sEscapedToken = EscapeToken (sToken);
                string sDisplayToken = display == null ? sEscapedToken : EscapeToken (display);
 
                if (pronunciation != null)
                { 
                    // Garbage transition is optional whereas Wildcard is not.  So we need additional epsilon transition. 
                    OneOf oneOf = pronunciation.IndexOf (';') >= 0 ? new OneOf (parent._rule, _backend) : null;
 
                    for (int iCurPron = 0, iDeliminator = 0; iCurPron < pronunciation.Length; iCurPron = iDeliminator + 1)
                    {
                        // Find semi-colon deliminator and replace with null
                        iDeliminator = pronunciation.IndexOf (';', iCurPron); 
                        if (iDeliminator == -1)
                        { 
                            iDeliminator = pronunciation.Length; 
                        }
 
                        string pron = pronunciation.Substring (iCurPron, iDeliminator - iCurPron);
                        string sSubPron = null;
                        switch (_backend.Alphabet)
                        { 
                            case AlphabetType.Sapi:
                                sSubPron = PhonemeConverter.ConvertPronToId (pron, _grammar.Backend.LangId); 
                                break; 

                            case AlphabetType.Ipa: 
                                sSubPron = pron;
                                PhonemeConverter.ValidateUpsIds (sSubPron);
                                break;
 
                            case AlphabetType.Ups:
                                sSubPron = PhonemeConverter.UpsConverter.ConvertPronToId (pron); 
                                break; 
                        }
 
                        // Build /D/L/P; form for this pronunciation.
                        string sDLP = string.Format (CultureInfo.InvariantCulture, "/{0}/{1}/{2};", sDisplayToken, sEscapedToken, sSubPron);

                        // Add /D/L/P; transition to the new state. 
                        if (oneOf != null)
                        { 
                            oneOf.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence)); 
                        }
                        else 
                        {
                            parent.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence));
                        }
                    } 

                    if (oneOf != null) 
                    { 
                        ((IOneOf) oneOf).PostParse (parent);
                    } 
                }
                else
                {
                    // Build /D/L; form for this pronunciation. 
                    string sDLP = string.Format (CultureInfo.InvariantCulture, "/{0}/{1};", sDisplayToken, sEscapedToken);
 
                    // Add /D/L; transition to the new state. 
                    parent.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence));
                } 
            }
            else
            {
                // Add transition to the new state with normalized token. 
                //
                parent.AddArc (_backend.WordTransition (sToken, 1.0f, requiredConfidence)); 
            } 
        }
 
#pragma warning restore 56507

        /// 
        /// Escape token.  "/" -> "\/", "\" -> "\\" 
        /// 
        ///  
        ///  
        private static string EscapeToken (string sToken)                     // String to escape
        { 
            System.Diagnostics.Debug.Assert (!string.IsNullOrEmpty (sToken));

            // Easy out if no escape characters
            if (sToken.IndexOf ("\\/", StringComparison.Ordinal) == -1) 
            {
                return sToken; 
            } 

            char [] achSrc = sToken.ToCharArray (); 
            char [] achDest = new char [achSrc.Length * 2];
            int iDest = 0;

            // Escape slashes and backslashes. 
            for (int i = 0; i < achSrc.Length; )
            { 
                if ((achSrc [i] == '\\') || (achSrc [i] == '/')) 
                {
                    achDest [iDest++] = '\\';                            // Escape special character 
                }

                achDest [iDest++] = achSrc [i++];
            } 

            // null terminate and update string length 
            return new string (achDest, 0, iDest); 
        }
 
        #endregion

        //*******************************************************************
        // 
        // Private Fields
        // 
        //******************************************************************* 

        #region Private Fields 

        // Callers param
        private Backend _backend;
 
        // Grammar
        private GrammarElement _grammar; 
 
#if !NO_STG
 
        // Callers param
        private CustomGrammar _cg;

#endif 

        #endregion 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: 
//
// History: 
//		5/1/2004	jeanfp		Created from the Kurosawa Code
//---------------------------------------------------------------------------

#region Using directives 

using System; 
using System.Collections.Generic; 
using System.Globalization;
using System.Text; 
using System.Speech.Internal.SrgsParser;

#endregion
 
#pragma warning disable 1634, 1691 // Allows suppression of certain PreSharp messages.
 
namespace System.Speech.Internal.SrgsCompiler 
{
    internal class SrgsElementCompilerFactory : IElementFactory 
    {

        //*******************************************************************
        // 
        // Constructors
        // 
        //******************************************************************* 

        #region Constructors 

#if !NO_STG
        internal SrgsElementCompilerFactory (Backend backend, CustomGrammar cg)
        { 
            _backend = backend;
            _cg = cg; 
            _grammar = new GrammarElement (backend, cg); 
        }
#else 
        internal SrgsElementCompilerFactory (Backend backend)
        {
            _backend = backend;
            _grammar = new GrammarElement (backend); 
        }
#endif 
        #endregion 

        //******************************************************************** 
        //
        // Internal Methods
        //
        //******************************************************************* 

        #region Internal Methods 
 
        /// 
        /// Clear all the rules 
        /// 
        void IElementFactory.RemoveAllRules ()
        {
        } 

        IPropertyTag IElementFactory.CreatePropertyTag (IElement parent) 
        { 
            return new PropertyTag ((ParseElementCollection) parent, _backend);
        } 

        ISemanticTag IElementFactory.CreateSemanticTag (IElement parent)
        {
            return new SemanticTag ((ParseElementCollection) parent, _backend); 
        }
 
        IElementText IElementFactory.CreateText (IElement parent, string value) 
        {
            return null; 
        }

        IToken IElementFactory.CreateToken (IElement parent, string content, string pronunciation, string display, float reqConfidence)
        { 
            ParseToken ((ParseElementCollection) parent, content, pronunciation, display, reqConfidence);
            return null; 
        } 

        IItem IElementFactory.CreateItem (IElement parent, IRule rule, int minRepeat, int maxRepeat, float repeatProbability, float weight) 
        {
            return (IItem) new Item (_backend, (Rule) rule, minRepeat, maxRepeat, repeatProbability, weight);
        }
 
        IRuleRef IElementFactory.CreateRuleRef (IElement parent, Uri srgsUri)
        { 
            throw new NotImplementedException (); 
        }
 
        IRuleRef IElementFactory.CreateRuleRef (IElement parent, Uri srgsUri, string semanticKey, string parameters)
        {
            return new RuleRef ((ParseElementCollection) parent, _backend, srgsUri, _grammar.UndefRules, semanticKey, parameters);
        } 

        void IElementFactory.InitSpecialRuleRef (IElement parent, IRuleRef specialRule) 
        { 
            ((RuleRef) specialRule).InitSpecialRuleRef (_backend, (ParseElementCollection) parent);
        } 

        IOneOf IElementFactory.CreateOneOf (IElement parent, IRule rule)
        {
            return (IOneOf) new OneOf ((Rule) rule, _backend); 
        }
 
        ISubset IElementFactory.CreateSubset (IElement parent, string text, MatchMode mode) 
        {
            return (ISubset) new Subset ((ParseElementCollection) parent, _backend, text, mode); 
        }
#if !NO_STG

        void IElementFactory.AddScript (IGrammar grammar, string rule, string code) 
        {
            ((GrammarElement) grammar).AddScript (rule, code); 
        } 

        string IElementFactory.AddScript (IGrammar grammar, string rule, string code, string filename, int line) 
        {
            // add the #line information
            if (line >= 0)
            { 
                if (_cg._language == "C#")
                { 
                    // C# 
                    return String.Format (CultureInfo.InvariantCulture, "#line {0} \"{1}\"\n{2}", line.ToString (CultureInfo.InvariantCulture), filename, code);
                } 
                else
                {
                    // VB.Net
                    return String.Format (CultureInfo.InvariantCulture, "#ExternalSource (\"{1}\",{0}) \n{2}\n#End ExternalSource\n", line.ToString (CultureInfo.InvariantCulture), filename, code); 
                }
            } 
            return code; 
        }
 
        void IElementFactory.AddScript (IGrammar grammar, string script, string filename, int line)
        {
            // add the #line information
            if (line >= 0) 
            {
                if (_cg._language == "C#") 
                { 
                    // C#
                    _cg._script.Append ("#line "); 
                    _cg._script.Append (line.ToString (CultureInfo.InvariantCulture));
                    _cg._script.Append (" \"");
                    _cg._script.Append (filename);
                    _cg._script.Append ("\"\n"); 
                    _cg._script.Append (script);
                } 
                else 
                {
                    // VB.Net 
                    _cg._script.Append ("#ExternalSource (");
                    _cg._script.Append (" \"");
                    _cg._script.Append (filename);
                    _cg._script.Append ("\","); 
                    _cg._script.Append (line.ToString (CultureInfo.InvariantCulture));
                    _cg._script.Append (")\n"); 
                    _cg._script.Append (script); 
                    _cg._script.Append ("#End #ExternalSource\n");
                } 
            }
            else
            {
                _cg._script.Append (script); 
            }
        } 
 
#endif
 
        void IElementFactory.AddItem (IOneOf oneOf, IItem item)
        {
        }
 
        void IElementFactory.AddElement (IRule rule, IElement value)
        { 
        } 

        void IElementFactory.AddElement (IItem item, IElement value) 
        {
        }

        #endregion 

        //******************************************************************** 
        // 
        // Internal Properties
        // 
        //********************************************************************

        #region Internal Properties
 
        IGrammar IElementFactory.Grammar
        { 
            get 
            {
                return _grammar; 
            }
        }

        IRuleRef IElementFactory.Null 
        {
            get 
            { 
                return RuleRef.Null;
            } 
        }
        IRuleRef IElementFactory.Void
        {
            get 
            {
                return RuleRef.Void; 
            } 
        }
        IRuleRef IElementFactory.Garbage 
        {
            get
            {
                return RuleRef.Garbage; 
            }
        } 
        #endregion 

        //******************************************************************* 
        //
        // Private Methods
        //
        //******************************************************************** 

        #region Private Methods 
 
        // Disable parameter validation check
#pragma warning disable 56507 

        /// 
        /// Add transition representing the normalized token.
        /// 
        /// White Space Normalization - Trim leading/trailing white spaces.
        ///                             Collapse white space sequences to a single ' '. 
        /// Restrictions - Normalized token cannot be empty. 
        ///                Normalized token cannot contain double-quote.
        /// 
        /// If (Parent == Token) And (Parent.SAPIPron.Length > 0) Then
        ///     Escape normalized token.  "/" -> "\/", "\" -> "\\"
        ///     Build /D/L/P; form from the escaped token and SAPIPron.
        /// 
        /// SAPIPron may be a semi-colon delimited list of pronunciations.
        /// In this case, a transition for each of the pronuncitions will be added. 
        /// 
        /// AddTransition(NormalizedToken, Parent.EndState, NewState)
        /// Parent.EndState = NewState 
        /// 
        /// Parent element
        /// Token string
        ///  
        /// 
        ///  
        private void ParseToken (ParseElementCollection parent, string sToken, string pronunciation, string display, float reqConfidence) 
        {
            int requiredConfidence = (parent != null) ? parent._confidence : CfgGrammar.SP_NORMAL_CONFIDENCE; 

            // Performs white space normalization in place
            sToken = Backend.NormalizeTokenWhiteSpace (sToken);
            if (string.IsNullOrEmpty (sToken)) 
            {
                return; 
            } 

            // "sapi:reqconf" Attribute 
            parent._confidence = CfgGrammar.SP_NORMAL_CONFIDENCE;  // Default to normal

            if (reqConfidence < 0 || reqConfidence.Equals (0.5f))
            { 
                parent._confidence = CfgGrammar.SP_NORMAL_CONFIDENCE;  // Default to normal
            } 
            else if (reqConfidence < 0.5) 
            {
                parent._confidence = CfgGrammar.SP_LOW_CONFIDENCE; 
            }
            else
            {
                parent._confidence = CfgGrammar.SP_HIGH_CONFIDENCE; 
            }
 
            // If SAPIPron is specified, use /D/L/P; as the transition text, for each of the pronunciations. 
            if (pronunciation != null || display != null)
            { 
                // Escape normalized token.  "/" -> "\/", "\" -> "\\"
                string sEscapedToken = EscapeToken (sToken);
                string sDisplayToken = display == null ? sEscapedToken : EscapeToken (display);
 
                if (pronunciation != null)
                { 
                    // Garbage transition is optional whereas Wildcard is not.  So we need additional epsilon transition. 
                    OneOf oneOf = pronunciation.IndexOf (';') >= 0 ? new OneOf (parent._rule, _backend) : null;
 
                    for (int iCurPron = 0, iDeliminator = 0; iCurPron < pronunciation.Length; iCurPron = iDeliminator + 1)
                    {
                        // Find semi-colon deliminator and replace with null
                        iDeliminator = pronunciation.IndexOf (';', iCurPron); 
                        if (iDeliminator == -1)
                        { 
                            iDeliminator = pronunciation.Length; 
                        }
 
                        string pron = pronunciation.Substring (iCurPron, iDeliminator - iCurPron);
                        string sSubPron = null;
                        switch (_backend.Alphabet)
                        { 
                            case AlphabetType.Sapi:
                                sSubPron = PhonemeConverter.ConvertPronToId (pron, _grammar.Backend.LangId); 
                                break; 

                            case AlphabetType.Ipa: 
                                sSubPron = pron;
                                PhonemeConverter.ValidateUpsIds (sSubPron);
                                break;
 
                            case AlphabetType.Ups:
                                sSubPron = PhonemeConverter.UpsConverter.ConvertPronToId (pron); 
                                break; 
                        }
 
                        // Build /D/L/P; form for this pronunciation.
                        string sDLP = string.Format (CultureInfo.InvariantCulture, "/{0}/{1}/{2};", sDisplayToken, sEscapedToken, sSubPron);

                        // Add /D/L/P; transition to the new state. 
                        if (oneOf != null)
                        { 
                            oneOf.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence)); 
                        }
                        else 
                        {
                            parent.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence));
                        }
                    } 

                    if (oneOf != null) 
                    { 
                        ((IOneOf) oneOf).PostParse (parent);
                    } 
                }
                else
                {
                    // Build /D/L; form for this pronunciation. 
                    string sDLP = string.Format (CultureInfo.InvariantCulture, "/{0}/{1};", sDisplayToken, sEscapedToken);
 
                    // Add /D/L; transition to the new state. 
                    parent.AddArc (_backend.WordTransition (sDLP, 1.0f, requiredConfidence));
                } 
            }
            else
            {
                // Add transition to the new state with normalized token. 
                //
                parent.AddArc (_backend.WordTransition (sToken, 1.0f, requiredConfidence)); 
            } 
        }
 
#pragma warning restore 56507

        /// 
        /// Escape token.  "/" -> "\/", "\" -> "\\" 
        /// 
        ///  
        ///  
        private static string EscapeToken (string sToken)                     // String to escape
        { 
            System.Diagnostics.Debug.Assert (!string.IsNullOrEmpty (sToken));

            // Easy out if no escape characters
            if (sToken.IndexOf ("\\/", StringComparison.Ordinal) == -1) 
            {
                return sToken; 
            } 

            char [] achSrc = sToken.ToCharArray (); 
            char [] achDest = new char [achSrc.Length * 2];
            int iDest = 0;

            // Escape slashes and backslashes. 
            for (int i = 0; i < achSrc.Length; )
            { 
                if ((achSrc [i] == '\\') || (achSrc [i] == '/')) 
                {
                    achDest [iDest++] = '\\';                            // Escape special character 
                }

                achDest [iDest++] = achSrc [i++];
            } 

            // null terminate and update string length 
            return new string (achDest, 0, iDest); 
        }
 
        #endregion

        //*******************************************************************
        // 
        // Private Fields
        // 
        //******************************************************************* 

        #region Private Fields 

        // Callers param
        private Backend _backend;
 
        // Grammar
        private GrammarElement _grammar; 
 
#if !NO_STG
 
        // Callers param
        private CustomGrammar _cg;

#endif 

        #endregion 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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