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ExportCodeFixProviderAttribute.cs
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/
ExportCodeFixProviderAttribute.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 System.Composition;
namespace Microsoft.CodeAnalysis.CodeFixes
{
/// <summary>
/// Use this attribute to declare a <see cref="CodeFixProvider"/> implementation so that it can be discovered by the host.
/// </summary>
[MetadataAttribute]
[AttributeUsage(AttributeTargets.Class)]
public sealed class ExportCodeFixProviderAttribute : ExportAttribute
{
/// <summary>
/// Optional name of the <see cref="CodeFixProvider"/>.
/// </summary>
public string Name { get; set; }
/// <summary>
/// The source languages this provider can provide fixes for. See <see cref="LanguageNames"/>.
/// </summary>
public string[] Languages { get; }
/// <summary>
/// Attribute constructor used to specify automatic application of a code fix provider.
/// </summary>
/// <param name="firstLanguage">One language to which the code fix provider applies.</param>
/// <param name="additionalLanguages">Additional languages to which the code fix provider applies. See <see cref="LanguageNames"/>.</param>
public ExportCodeFixProviderAttribute(
string firstLanguage,
params string[] additionalLanguages)
: base(typeof(CodeFixProvider))
{
if (additionalLanguages == null)
{
throw new ArgumentNullException(nameof(additionalLanguages));
}
this.Name = null;
string[] languages = new string[additionalLanguages.Length + 1];
languages[0] = firstLanguage ?? throw new ArgumentNullException(nameof(firstLanguage));
for (int index = 0; index < additionalLanguages.Length; index++)
{
languages[index + 1] = additionalLanguages[index];
}
this.Languages = languages;
}
}
}