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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using System;
using System.Collections.Immutable;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.FindUsages;
/// <summary>
/// A collection of <see cref="DefinitionItem"/>s and <see cref="SourceReferenceItem"/>s
/// that can be presented in an editor and used to navigate to the defintions and
/// references found for a symbol.
/// </summary>
internal readonly struct DefinitionsAndReferences
{
public static readonly DefinitionsAndReferences Empty =
new([], []);
/// <summary>
/// All the definitions to show. Note: not all definitions may have references.
/// </summary>
public ImmutableArray<DefinitionItem> Definitions { get; }
/// <summary>
/// All the references to show. Note: every <see cref="SourceReferenceItem.Definition"/>
/// should be in <see cref="Definitions"/>
/// </summary>
public ImmutableArray<SourceReferenceItem> References { get; }
public DefinitionsAndReferences(
ImmutableArray<DefinitionItem> definitions,
ImmutableArray<SourceReferenceItem> references)
{
var definitionSet = definitions.ToSet();
for (int i = 0, n = references.Length; i < n; i++)
{
var reference = references[i];
if (!definitionSet.Contains(reference.Definition))
{
throw new ArgumentException(
$"{nameof(references)}[{i}].{nameof(reference.Definition)} not found in '{nameof(definitions)}'");
}
}
Definitions = definitions;
References = references;
}
}
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