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OptionKey.cs
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OptionKey.cs
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// Copyright (c) Microsoft. All Rights Reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using Roslyn.Utilities;
#if CODE_STYLE
using WorkspacesResources = Microsoft.CodeAnalysis.CodeStyleResources;
#endif
namespace Microsoft.CodeAnalysis.Options
{
public struct OptionKey : IEquatable<OptionKey>
{
public IOption Option { get; }
public string Language { get; }
public OptionKey(IOption option, string language = null)
{
if (language != null && !option.IsPerLanguage)
{
throw new ArgumentException(WorkspacesResources.A_language_name_cannot_be_specified_for_this_option);
}
else if (language == null && option.IsPerLanguage)
{
throw new ArgumentNullException(WorkspacesResources.A_language_name_must_be_specified_for_this_option);
}
this.Option = option ?? throw new ArgumentNullException(nameof(option));
this.Language = language;
}
public override bool Equals(object obj)
{
return obj is OptionKey key &&
Equals(key);
}
public bool Equals(OptionKey other)
{
return Option == other.Option && Language == other.Language;
}
public override int GetHashCode()
{
var hash = Option.GetHashCode();
if (Language != null)
{
hash = unchecked((hash * (int)0xA5555529) + Language.GetHashCode());
}
return hash;
}
public override string ToString()
{
if (Option is null)
{
return "";
}
var languageDisplay = Option.IsPerLanguage
? $"({Language}) "
: string.Empty;
return languageDisplay + Option.ToString();
}
public static bool operator ==(OptionKey left, OptionKey right)
{
return left.Equals(right);
}
public static bool operator !=(OptionKey left, OptionKey right)
{
return !left.Equals(right);
}
}
}