/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System.Diagnostics;
using Microsoft.Scripting.Utils;
namespace Microsoft.Scripting.Runtime{
class ExtraKeyEnumerator : CheckedDictionaryEnumerator {
private CustomSymbolDictionary _idDict;
private int _curIndex = -1;
public ExtraKeyEnumerator(CustomSymbolDictionary idDict) {
_idDict = idDict;
}
protected override object GetKey() {
return SymbolTable.IdToString(_idDict.GetExtraKeys()[_curIndex]);
}
protected override object GetValue() {
object val;
bool hasExtraValue = _idDict.TryGetExtraValue(_idDict.GetExtraKeys()[_curIndex], out val);
Debug.Assert(hasExtraValue && !(val is Uninitialized));
return val;
}
protected override bool DoMoveNext() {
if (_idDict.GetExtraKeys().Length == 0)
return false;
while (_curIndex < (_idDict.GetExtraKeys().Length - 1)) {
_curIndex++;
if (_idDict.GetExtraKeys()[_curIndex].Id < 0) break;
object val;
if (_idDict.TryGetExtraValue(_idDict.GetExtraKeys()[_curIndex], out val) && val != Uninitialized.Instance) {
return true;
}
}
return false;
}
protected override void DoReset() {
_curIndex = -1;
}
}
}
|