Expr.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / Expr.cs / 2 / Expr.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backup [....] 
//--------------------------------------------------------------------- 

 
namespace System.Data.Common.EntitySql
{
    using System;
    using System.Globalization; 
    using System.Collections;
    using System.Collections.Generic; 
 

    enum AstExprKind 
    {
        Generic,
        Query,
        Insert, 
        Update,
        Delete 
    } 

    ///  
    /// Represents the base type of all Expression Nodes
    /// 
    internal abstract class Expr : AstNode
    { 
        internal Expr() : base() { }
 
        internal Expr( string query, int inputPos ) : base(query, inputPos) { } 

        internal virtual AstExprKind ExprKind 
        {
            get { return AstExprKind.Generic; }
        }
 
    }
 
 
    /// 
    /// Represents generic list of expressions. 
    /// 
    /// expression type
    internal sealed class ExprList : Expr, System.Collections.Generic.IEnumerable
    { 
        private List _exprList = new List();
 
        ///  
        /// default constructor
        ///  
        internal ExprList()
        {
        }
 
        /// 
        /// initializes adding one item to the list. 
        ///  
        /// expression
        internal ExprList( T item ) 
        {
            _exprList.Add(item);
        }
 

        ///  
        /// add an expression to the expression list. 
        /// 
        /// Expression 
        /// Updated ExpressionList
        internal ExprList Add( T item )
        {
            _exprList.Add(item); 

            return this; 
        } 

        ///  
        /// Returns the list of expressions
        /// 
        internal List Expressions
        { 
            get { return _exprList; }
        } 
 
#if __WHEN_NEEDED__
        ///  
        /// Verifies if list elements if of specified type.
        /// 
        /// instance of a given type
        /// true if is the same type, false otherwise 
        internal bool IsListOf( object o )
        { 
            return o.GetType().Equals( typeof( T ) ); 
        }
#endif 

        /// 
        /// Returns the number of elements in the list
        ///  
        internal int Count
        { 
            get { return _exprList.Count; } 
        }
 
        /// 
        /// Indexer to the list entries.
        /// 
        /// integer position of the element in the list 
        /// Expression
        internal T this[int index] 
        { 
            get { return _exprList[index]; }
        } 

        #region GetEnumerator
        System.Collections.Generic.IEnumerator System.Collections.Generic.IEnumerable.GetEnumerator()
        { 
            return _exprList.GetEnumerator();
        } 
 
        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        { 
            return _exprList.GetEnumerator();
        }
        #endregion
 
    }
 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backup [....] 
//--------------------------------------------------------------------- 

 
namespace System.Data.Common.EntitySql
{
    using System;
    using System.Globalization; 
    using System.Collections;
    using System.Collections.Generic; 
 

    enum AstExprKind 
    {
        Generic,
        Query,
        Insert, 
        Update,
        Delete 
    } 

    ///  
    /// Represents the base type of all Expression Nodes
    /// 
    internal abstract class Expr : AstNode
    { 
        internal Expr() : base() { }
 
        internal Expr( string query, int inputPos ) : base(query, inputPos) { } 

        internal virtual AstExprKind ExprKind 
        {
            get { return AstExprKind.Generic; }
        }
 
    }
 
 
    /// 
    /// Represents generic list of expressions. 
    /// 
    /// expression type
    internal sealed class ExprList : Expr, System.Collections.Generic.IEnumerable
    { 
        private List _exprList = new List();
 
        ///  
        /// default constructor
        ///  
        internal ExprList()
        {
        }
 
        /// 
        /// initializes adding one item to the list. 
        ///  
        /// expression
        internal ExprList( T item ) 
        {
            _exprList.Add(item);
        }
 

        ///  
        /// add an expression to the expression list. 
        /// 
        /// Expression 
        /// Updated ExpressionList
        internal ExprList Add( T item )
        {
            _exprList.Add(item); 

            return this; 
        } 

        ///  
        /// Returns the list of expressions
        /// 
        internal List Expressions
        { 
            get { return _exprList; }
        } 
 
#if __WHEN_NEEDED__
        ///  
        /// Verifies if list elements if of specified type.
        /// 
        /// instance of a given type
        /// true if is the same type, false otherwise 
        internal bool IsListOf( object o )
        { 
            return o.GetType().Equals( typeof( T ) ); 
        }
#endif 

        /// 
        /// Returns the number of elements in the list
        ///  
        internal int Count
        { 
            get { return _exprList.Count; } 
        }
 
        /// 
        /// Indexer to the list entries.
        /// 
        /// integer position of the element in the list 
        /// Expression
        internal T this[int index] 
        { 
            get { return _exprList[index]; }
        } 

        #region GetEnumerator
        System.Collections.Generic.IEnumerator System.Collections.Generic.IEnumerable.GetEnumerator()
        { 
            return _exprList.GetEnumerator();
        } 
 
        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        { 
            return _exprList.GetEnumerator();
        }
        #endregion
 
    }
 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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Expr.cs source code in C# .NET

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