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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System.Diagnostics.Contracts;
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namespace ICSharpCode.NRefactory.TypeSystem
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[ContractClass(typeof(IFreezableContract))]
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public interface IFreezable
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/// Gets if this instance is frozen. Frozen instances are immutable and thus thread-safe.
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bool IsFrozen { get; }
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/// Freezes this instance.
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[ContractClassFor(typeof(IFreezable))]
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abstract class IFreezableContract : IFreezable
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bool IFreezable.IsFrozen {
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get { return default(bool); }
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void IFreezable.Freeze()
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IFreezable self = this;
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Contract.Ensures(self.IsFrozen);