SymbolTable.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / SqlClient / SqlGen / SymbolTable.cs / 1305376 / SymbolTable.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Text; 
using System.Data.SqlClient;
using System.Data.Metadata.Edm; 
using System.Data.Common.CommandTrees; 

namespace System.Data.SqlClient.SqlGen 
{
    /// 
    /// The symbol table is quite primitive - it is a stack with a new entry for
    /// each scope.  Lookups search from the top of the stack to the bottom, until 
    /// an entry is found.
    /// 
    /// The symbols are of the following kinds 
    /// 
    ///  represents tables (extents/nested selects/unnests) 
    ///  represents Join nodes
    ///  columns.
    /// 
    /// 
    /// Symbols represent names  to be resolved,
    /// or things to be renamed. 
    ///  
    internal sealed class SymbolTable
    { 
        private List> symbols = new List>();

        internal void EnterScope()
        { 
            symbols.Add(new Dictionary(StringComparer.OrdinalIgnoreCase));
        } 
 
        internal void ExitScope()
        { 
            symbols.RemoveAt(symbols.Count - 1);
        }

        internal void Add(string name, Symbol value) 
        {
            symbols[symbols.Count - 1][name] = value; 
        } 

        internal Symbol Lookup(string name) 
        {
            for (int i = symbols.Count - 1; i >= 0; --i)
            {
                if (symbols[i].ContainsKey(name)) 
                {
                    return symbols[i][name]; 
                } 
            }
 
            return null;
        }
    }
} 

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

using System; 
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Text; 
using System.Data.SqlClient;
using System.Data.Metadata.Edm; 
using System.Data.Common.CommandTrees; 

namespace System.Data.SqlClient.SqlGen 
{
    /// 
    /// The symbol table is quite primitive - it is a stack with a new entry for
    /// each scope.  Lookups search from the top of the stack to the bottom, until 
    /// an entry is found.
    /// 
    /// The symbols are of the following kinds 
    /// 
    ///  represents tables (extents/nested selects/unnests) 
    ///  represents Join nodes
    ///  columns.
    /// 
    /// 
    /// Symbols represent names  to be resolved,
    /// or things to be renamed. 
    ///  
    internal sealed class SymbolTable
    { 
        private List> symbols = new List>();

        internal void EnterScope()
        { 
            symbols.Add(new Dictionary(StringComparer.OrdinalIgnoreCase));
        } 
 
        internal void ExitScope()
        { 
            symbols.RemoveAt(symbols.Count - 1);
        }

        internal void Add(string name, Symbol value) 
        {
            symbols[symbols.Count - 1][name] = value; 
        } 

        internal Symbol Lookup(string name) 
        {
            for (int i = symbols.Count - 1; i >= 0; --i)
            {
                if (symbols[i].ContainsKey(name)) 
                {
                    return symbols[i][name]; 
                } 
            }
 
            return null;
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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