reformatted all code to .NET standard formatting

1 files changed, 352 insertions, 296 deletions

diff --git a/src/ProtocolBuffers/Descriptors/DescriptorPool.cs b/src/ProtocolBuffers/Descriptors/DescriptorPool.cs
index c8654572..12abafeb 100644
--- a/src/ProtocolBuffers/Descriptors/DescriptorPool.cs
+++ b/src/ProtocolBuffers/Descriptors/DescriptorPool.cs
@@ -1,296 +1,352 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// http://github.com/jskeet/dotnet-protobufs/
-// Original C++/Java/Python code:
-// http://code.google.com/p/protobuf/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-using System.Collections.Generic;
-using System;
-using System.Text;
-using System.Text.RegularExpressions;
-
-namespace Google.ProtocolBuffers.Descriptors {
-  /// <summary>
-  /// Contains lookup tables containing all the descriptors defined in a particular file.
-  /// </summary>
-  internal sealed class DescriptorPool {
-
-    private readonly IDictionary<string, IDescriptor> descriptorsByName =
-        new Dictionary<string, IDescriptor>();
-    private readonly IDictionary<DescriptorIntPair, FieldDescriptor> fieldsByNumber =
-        new Dictionary<DescriptorIntPair, FieldDescriptor>();
-    private readonly IDictionary<DescriptorIntPair, EnumValueDescriptor> enumValuesByNumber =
-        new Dictionary<DescriptorIntPair, EnumValueDescriptor>();
-    private readonly DescriptorPool[] dependencies;
-
-    internal DescriptorPool(FileDescriptor[] dependencyFiles) {
-      dependencies = new DescriptorPool[dependencyFiles.Length];
-      for (int i = 0; i < dependencyFiles.Length; i++) {
-        dependencies[i] = dependencyFiles[i].DescriptorPool;
-      }
-
-      foreach (FileDescriptor dependency in dependencyFiles) {
-        AddPackage(dependency.Package, dependency);
-      }
-    }
-
-    /// <summary>
-    /// Finds a symbol of the given name within the pool.
-    /// </summary>
-    /// <typeparam name="T">The type of symbol to look for</typeparam>
-    /// <param name="fullName">Fully-qualified name to look up</param>
-    /// <returns>The symbol with the given name and type,
-    /// or null if the symbol doesn't exist or has the wrong type</returns>
-    internal T FindSymbol<T>(string fullName) where T : class, IDescriptor {
-      IDescriptor result;
-      descriptorsByName.TryGetValue(fullName, out result);
-      T descriptor = result as T;
-      if (descriptor != null) {
-        return descriptor;
-      }
-
-      foreach (DescriptorPool dependency in dependencies) {
-        dependency.descriptorsByName.TryGetValue(fullName, out result);
-        descriptor = result as T;
-        if (descriptor != null) {
-          return descriptor;
-        }
-      }
-
-      return null;
-    }
-
-    /// <summary>
-    /// Adds a package to the symbol tables. If a package by the same name
-    /// already exists, that is fine, but if some other kind of symbol
-    /// exists under the same name, an exception is thrown. If the package
-    /// has multiple components, this also adds the parent package(s).
-    /// </summary>
-    internal void AddPackage(string fullName, FileDescriptor file) {
-      int dotpos = fullName.LastIndexOf('.');
-      String name;
-      if (dotpos != -1) {
-        AddPackage(fullName.Substring(0, dotpos), file);
-        name = fullName.Substring(dotpos + 1);
-      } else {
-        name = fullName;
-      }
-
-      IDescriptor old;
-      if (descriptorsByName.TryGetValue(fullName, out old)) {
-        if (!(old is PackageDescriptor)) {
-          throw new DescriptorValidationException(file,
-           "\"" + name + "\" is already defined (as something other than a " +
-            "package) in file \"" + old.File.Name + "\".");
-        }
-      }
-      descriptorsByName[fullName] = new PackageDescriptor(name, fullName, file);
-    }
-
-    /// <summary>
-    /// Adds a symbol to the symbol table.
-    /// </summary>
-    /// <exception cref="DescriptorValidationException">The symbol already existed
-    /// in the symbol table.</exception>
-    internal void AddSymbol(IDescriptor descriptor) {
-      ValidateSymbolName(descriptor);
-      String fullName = descriptor.FullName;
-
-      IDescriptor old;
-      if (descriptorsByName.TryGetValue(fullName, out old)) {
-        int dotPos = fullName.LastIndexOf('.');
-        string message;
-        if (descriptor.File == old.File) {
-          if (dotPos == -1) {
-            message = "\"" + fullName + "\" is already defined.";
-          } else {
-            message = "\"" + fullName.Substring(dotPos + 1) + "\" is already defined in \"" + fullName.Substring(0, dotPos) + "\".";
-          }
-        } else {
-          message = "\"" + fullName + "\" is already defined in file \"" + old.File.Name + "\".";
-        }
-        throw new DescriptorValidationException(descriptor, message);
-      }
-      descriptorsByName[fullName] = descriptor;
-    }
-
-    private static readonly Regex ValidationRegex = new Regex("^[_A-Za-z][_A-Za-z0-9]*$", SilverlightCompatibility.CompiledRegexWhereAvailable);
-
-    /// <summary>
-    /// Verifies that the descriptor's name is valid (i.e. it contains
-    /// only letters, digits and underscores, and does not start with a digit).
-    /// </summary>
-    /// <param name="descriptor"></param>
-    private static void ValidateSymbolName(IDescriptor descriptor) {
-      if (descriptor.Name == "") {
-        throw new DescriptorValidationException(descriptor, "Missing name.");
-      }
-      if (!ValidationRegex.IsMatch(descriptor.Name)) {
-        throw new DescriptorValidationException(descriptor,
-            "\"" + descriptor.Name + "\" is not a valid identifier.");
-      }
-    }
-
-    /// <summary>
-    /// Returns the field with the given number in the given descriptor,
-    /// or null if it can't be found.
-    /// </summary>
-    internal FieldDescriptor FindFieldByNumber(MessageDescriptor messageDescriptor, int number) {
-      FieldDescriptor ret;
-      fieldsByNumber.TryGetValue(new DescriptorIntPair(messageDescriptor, number), out ret);
-      return ret;
-    }
-
-    internal EnumValueDescriptor FindEnumValueByNumber(EnumDescriptor enumDescriptor, int number) {
-      EnumValueDescriptor ret;
-      enumValuesByNumber.TryGetValue(new DescriptorIntPair(enumDescriptor, number), out ret);
-      return ret;
-    }
-
-    /// <summary>
-    /// Adds a field to the fieldsByNumber table.
-    /// </summary>
-    /// <exception cref="DescriptorValidationException">A field with the same
-    /// containing type and number already exists.</exception>
-    internal void AddFieldByNumber(FieldDescriptor field) {
-      DescriptorIntPair key = new DescriptorIntPair(field.ContainingType, field.FieldNumber);
-      FieldDescriptor old;
-      if (fieldsByNumber.TryGetValue(key, out old)) {
-        throw new DescriptorValidationException(field, "Field number " + field.FieldNumber +
-          "has already been used in \"" + field.ContainingType.FullName +
-          "\" by field \"" + old.Name + "\".");
-      }
-      fieldsByNumber[key] = field;
-    }
-
-    /// <summary>
-    /// Adds an enum value to the enumValuesByNumber table. If an enum value
-    /// with the same type and number already exists, this method does nothing.
-    /// (This is allowed; the first value defined with the number takes precedence.)
-    /// </summary>
-    internal void AddEnumValueByNumber(EnumValueDescriptor enumValue) {
-      DescriptorIntPair key = new DescriptorIntPair(enumValue.EnumDescriptor, enumValue.Number);
-      if (!enumValuesByNumber.ContainsKey(key)) {
-        enumValuesByNumber[key] = enumValue;
-      }
-    }
-
-    /// <summary>
-    /// Looks up a descriptor by name, relative to some other descriptor.
-    /// The name may be fully-qualified (with a leading '.'), partially-qualified,
-    /// or unqualified. C++-like name lookup semantics are used to search for the
-    /// matching descriptor.
-    /// </summary>
-    public IDescriptor LookupSymbol(string name, IDescriptor relativeTo) {
-      // TODO(jonskeet):  This could be optimized in a number of ways.
-
-      IDescriptor result;
-      if (name.StartsWith(".")) {
-        // Fully-qualified name.
-        result = FindSymbol<IDescriptor>(name.Substring(1));
-      } else {
-        // If "name" is a compound identifier, we want to search for the
-        // first component of it, then search within it for the rest.
-        int firstPartLength = name.IndexOf('.');
-        string firstPart = firstPartLength == -1 ? name : name.Substring(0, firstPartLength);
-
-        // We will search each parent scope of "relativeTo" looking for the
-        // symbol.
-        StringBuilder scopeToTry = new StringBuilder(relativeTo.FullName);
-
-        while (true) {
-          // Chop off the last component of the scope.
-
-          // TODO(jonskeet): Make this more efficient. May not be worth using StringBuilder at all
-          int dotpos = scopeToTry.ToString().LastIndexOf(".");
-          if (dotpos == -1) {
-            result = FindSymbol<IDescriptor>(name);
-            break;
-          } else {
-            scopeToTry.Length = dotpos + 1;
-
-            // Append firstPart and try to find.
-            scopeToTry.Append(firstPart);
-            result = FindSymbol<IDescriptor>(scopeToTry.ToString());
-
-            if (result != null) {
-              if (firstPartLength != -1) {
-                // We only found the first part of the symbol.  Now look for
-                // the whole thing.  If this fails, we *don't* want to keep
-                // searching parent scopes.
-                scopeToTry.Length = dotpos + 1;
-                scopeToTry.Append(name);
-                result = FindSymbol<IDescriptor>(scopeToTry.ToString());
-              }
-              break;
-            }
-
-            // Not found.  Remove the name so we can try again.
-            scopeToTry.Length = dotpos;
-          }
-        }
-      }
-
-      if (result == null) {
-        throw new DescriptorValidationException(relativeTo, "\"" + name + "\" is not defined.");
-      } else {
-        return result;
-      }
-    }
-
-    /// <summary>
-    /// Struct used to hold the keys for the fieldByNumber table.
-    /// </summary>
-    struct DescriptorIntPair : IEquatable<DescriptorIntPair> {
-
-      private readonly int number;
-      private readonly IDescriptor descriptor;
-
-      internal DescriptorIntPair(IDescriptor descriptor, int number) {
-        this.number = number;
-        this.descriptor = descriptor;
-      }
-
-      public bool Equals(DescriptorIntPair other) {
-        return descriptor == other.descriptor
-            && number == other.number;
-      }
-
-      public override bool Equals(object obj) {
-        if (obj is DescriptorIntPair) {
-          return Equals((DescriptorIntPair)obj);
-        }
-        return false;
-      }
-
-      public override int GetHashCode() {
-        return descriptor.GetHashCode() * ((1 << 16) - 1) + number;
-      }
-    }
-  }
-}
+// Protocol Buffers - Google's data interchange format

+// Copyright 2008 Google Inc.  All rights reserved.

+// http://github.com/jskeet/dotnet-protobufs/

+// Original C++/Java/Python code:

+// http://code.google.com/p/protobuf/

+//

+// Redistribution and use in source and binary forms, with or without

+// modification, are permitted provided that the following conditions are

+// met:

+//

+//     * Redistributions of source code must retain the above copyright

+// notice, this list of conditions and the following disclaimer.

+//     * Redistributions in binary form must reproduce the above

+// copyright notice, this list of conditions and the following disclaimer

+// in the documentation and/or other materials provided with the

+// distribution.

+//     * Neither the name of Google Inc. nor the names of its

+// contributors may be used to endorse or promote products derived from

+// this software without specific prior written permission.

+//

+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+using System.Collections.Generic;

+using System;

+using System.Text;

+using System.Text.RegularExpressions;

+

+namespace Google.ProtocolBuffers.Descriptors

+{

+    /// <summary>

+    /// Contains lookup tables containing all the descriptors defined in a particular file.

+    /// </summary>

+    internal sealed class DescriptorPool

+    {

+        private readonly IDictionary<string, IDescriptor> descriptorsByName =

+            new Dictionary<string, IDescriptor>();

+

+        private readonly IDictionary<DescriptorIntPair, FieldDescriptor> fieldsByNumber =

+            new Dictionary<DescriptorIntPair, FieldDescriptor>();

+

+        private readonly IDictionary<DescriptorIntPair, EnumValueDescriptor> enumValuesByNumber =

+            new Dictionary<DescriptorIntPair, EnumValueDescriptor>();

+

+        private readonly DescriptorPool[] dependencies;

+

+        internal DescriptorPool(FileDescriptor[] dependencyFiles)

+        {

+            dependencies = new DescriptorPool[dependencyFiles.Length];

+            for (int i = 0; i < dependencyFiles.Length; i++)

+            {

+                dependencies[i] = dependencyFiles[i].DescriptorPool;

+            }

+

+            foreach (FileDescriptor dependency in dependencyFiles)

+            {

+                AddPackage(dependency.Package, dependency);

+            }

+        }

+

+        /// <summary>

+        /// Finds a symbol of the given name within the pool.

+        /// </summary>

+        /// <typeparam name="T">The type of symbol to look for</typeparam>

+        /// <param name="fullName">Fully-qualified name to look up</param>

+        /// <returns>The symbol with the given name and type,

+        /// or null if the symbol doesn't exist or has the wrong type</returns>

+        internal T FindSymbol<T>(string fullName) where T : class, IDescriptor

+        {

+            IDescriptor result;

+            descriptorsByName.TryGetValue(fullName, out result);

+            T descriptor = result as T;

+            if (descriptor != null)

+            {

+                return descriptor;

+            }

+

+            foreach (DescriptorPool dependency in dependencies)

+            {

+                dependency.descriptorsByName.TryGetValue(fullName, out result);

+                descriptor = result as T;

+                if (descriptor != null)

+                {

+                    return descriptor;

+                }

+            }

+

+            return null;

+        }

+

+        /// <summary>

+        /// Adds a package to the symbol tables. If a package by the same name

+        /// already exists, that is fine, but if some other kind of symbol

+        /// exists under the same name, an exception is thrown. If the package

+        /// has multiple components, this also adds the parent package(s).

+        /// </summary>

+        internal void AddPackage(string fullName, FileDescriptor file)

+        {

+            int dotpos = fullName.LastIndexOf('.');

+            String name;

+            if (dotpos != -1)

+            {

+                AddPackage(fullName.Substring(0, dotpos), file);

+                name = fullName.Substring(dotpos + 1);

+            }

+            else

+            {

+                name = fullName;

+            }

+

+            IDescriptor old;

+            if (descriptorsByName.TryGetValue(fullName, out old))

+            {

+                if (!(old is PackageDescriptor))

+                {

+                    throw new DescriptorValidationException(file,

+                                                            "\"" + name +

+                                                            "\" is already defined (as something other than a " +

+                                                            "package) in file \"" + old.File.Name + "\".");

+                }

+            }

+            descriptorsByName[fullName] = new PackageDescriptor(name, fullName, file);

+        }

+

+        /// <summary>

+        /// Adds a symbol to the symbol table.

+        /// </summary>

+        /// <exception cref="DescriptorValidationException">The symbol already existed

+        /// in the symbol table.</exception>

+        internal void AddSymbol(IDescriptor descriptor)

+        {

+            ValidateSymbolName(descriptor);

+            String fullName = descriptor.FullName;

+

+            IDescriptor old;

+            if (descriptorsByName.TryGetValue(fullName, out old))

+            {

+                int dotPos = fullName.LastIndexOf('.');

+                string message;

+                if (descriptor.File == old.File)

+                {

+                    if (dotPos == -1)

+                    {

+                        message = "\"" + fullName + "\" is already defined.";

+                    }

+                    else

+                    {

+                        message = "\"" + fullName.Substring(dotPos + 1) + "\" is already defined in \"" +

+                                  fullName.Substring(0, dotPos) + "\".";

+                    }

+                }

+                else

+                {

+                    message = "\"" + fullName + "\" is already defined in file \"" + old.File.Name + "\".";

+                }

+                throw new DescriptorValidationException(descriptor, message);

+            }

+            descriptorsByName[fullName] = descriptor;

+        }

+

+        private static readonly Regex ValidationRegex = new Regex("^[_A-Za-z][_A-Za-z0-9]*$",

+                                                                  SilverlightCompatibility.CompiledRegexWhereAvailable);

+

+        /// <summary>

+        /// Verifies that the descriptor's name is valid (i.e. it contains

+        /// only letters, digits and underscores, and does not start with a digit).

+        /// </summary>

+        /// <param name="descriptor"></param>

+        private static void ValidateSymbolName(IDescriptor descriptor)

+        {

+            if (descriptor.Name == "")

+            {

+                throw new DescriptorValidationException(descriptor, "Missing name.");

+            }

+            if (!ValidationRegex.IsMatch(descriptor.Name))

+            {

+                throw new DescriptorValidationException(descriptor,

+                                                        "\"" + descriptor.Name + "\" is not a valid identifier.");

+            }

+        }

+

+        /// <summary>

+        /// Returns the field with the given number in the given descriptor,

+        /// or null if it can't be found.

+        /// </summary>

+        internal FieldDescriptor FindFieldByNumber(MessageDescriptor messageDescriptor, int number)

+        {

+            FieldDescriptor ret;

+            fieldsByNumber.TryGetValue(new DescriptorIntPair(messageDescriptor, number), out ret);

+            return ret;

+        }

+

+        internal EnumValueDescriptor FindEnumValueByNumber(EnumDescriptor enumDescriptor, int number)

+        {

+            EnumValueDescriptor ret;

+            enumValuesByNumber.TryGetValue(new DescriptorIntPair(enumDescriptor, number), out ret);

+            return ret;

+        }

+

+        /// <summary>

+        /// Adds a field to the fieldsByNumber table.

+        /// </summary>

+        /// <exception cref="DescriptorValidationException">A field with the same

+        /// containing type and number already exists.</exception>

+        internal void AddFieldByNumber(FieldDescriptor field)

+        {

+            DescriptorIntPair key = new DescriptorIntPair(field.ContainingType, field.FieldNumber);

+            FieldDescriptor old;

+            if (fieldsByNumber.TryGetValue(key, out old))

+            {

+                throw new DescriptorValidationException(field, "Field number " + field.FieldNumber +

+                                                               "has already been used in \"" +

+                                                               field.ContainingType.FullName +

+                                                               "\" by field \"" + old.Name + "\".");

+            }

+            fieldsByNumber[key] = field;

+        }

+

+        /// <summary>

+        /// Adds an enum value to the enumValuesByNumber table. If an enum value

+        /// with the same type and number already exists, this method does nothing.

+        /// (This is allowed; the first value defined with the number takes precedence.)

+        /// </summary>

+        internal void AddEnumValueByNumber(EnumValueDescriptor enumValue)

+        {

+            DescriptorIntPair key = new DescriptorIntPair(enumValue.EnumDescriptor, enumValue.Number);

+            if (!enumValuesByNumber.ContainsKey(key))

+            {

+                enumValuesByNumber[key] = enumValue;

+            }

+        }

+

+        /// <summary>

+        /// Looks up a descriptor by name, relative to some other descriptor.

+        /// The name may be fully-qualified (with a leading '.'), partially-qualified,

+        /// or unqualified. C++-like name lookup semantics are used to search for the

+        /// matching descriptor.

+        /// </summary>

+        public IDescriptor LookupSymbol(string name, IDescriptor relativeTo)

+        {

+            // TODO(jonskeet):  This could be optimized in a number of ways.

+

+            IDescriptor result;

+            if (name.StartsWith("."))

+            {

+                // Fully-qualified name.

+                result = FindSymbol<IDescriptor>(name.Substring(1));

+            }

+            else

+            {

+                // If "name" is a compound identifier, we want to search for the

+                // first component of it, then search within it for the rest.

+                int firstPartLength = name.IndexOf('.');

+                string firstPart = firstPartLength == -1 ? name : name.Substring(0, firstPartLength);

+

+                // We will search each parent scope of "relativeTo" looking for the

+                // symbol.

+                StringBuilder scopeToTry = new StringBuilder(relativeTo.FullName);

+

+                while (true)

+                {

+                    // Chop off the last component of the scope.

+

+                    // TODO(jonskeet): Make this more efficient. May not be worth using StringBuilder at all

+                    int dotpos = scopeToTry.ToString().LastIndexOf(".");

+                    if (dotpos == -1)

+                    {

+                        result = FindSymbol<IDescriptor>(name);

+                        break;

+                    }

+                    else

+                    {

+                        scopeToTry.Length = dotpos + 1;

+

+                        // Append firstPart and try to find.

+                        scopeToTry.Append(firstPart);

+                        result = FindSymbol<IDescriptor>(scopeToTry.ToString());

+

+                        if (result != null)

+                        {

+                            if (firstPartLength != -1)

+                            {

+                                // We only found the first part of the symbol.  Now look for

+                                // the whole thing.  If this fails, we *don't* want to keep

+                                // searching parent scopes.

+                                scopeToTry.Length = dotpos + 1;

+                                scopeToTry.Append(name);

+                                result = FindSymbol<IDescriptor>(scopeToTry.ToString());

+                            }

+                            break;

+                        }

+

+                        // Not found.  Remove the name so we can try again.

+                        scopeToTry.Length = dotpos;

+                    }

+                }

+            }

+

+            if (result == null)

+            {

+                throw new DescriptorValidationException(relativeTo, "\"" + name + "\" is not defined.");

+            }

+            else

+            {

+                return result;

+            }

+        }

+

+        /// <summary>

+        /// Struct used to hold the keys for the fieldByNumber table.

+        /// </summary>

+        private struct DescriptorIntPair : IEquatable<DescriptorIntPair>

+        {

+            private readonly int number;

+            private readonly IDescriptor descriptor;

+

+            internal DescriptorIntPair(IDescriptor descriptor, int number)

+            {

+                this.number = number;

+                this.descriptor = descriptor;

+            }

+

+            public bool Equals(DescriptorIntPair other)

+            {

+                return descriptor == other.descriptor

+                       && number == other.number;

+            }

+

+            public override bool Equals(object obj)

+            {

+                if (obj is DescriptorIntPair)

+                {

+                    return Equals((DescriptorIntPair) obj);

+                }

+                return false;

+            }

+

+            public override int GetHashCode()

+            {

+                return descriptor.GetHashCode()*((1 << 16) - 1) + number;

+            }

+        }

+    }

+}
\ No newline at end of file