// 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. using System.Diagnostics; using System.Runtime.Serialization; namespace Microsoft.CodeAnalysis; /// <summary> /// Provides information about the way a particular symbol is being used at a symbol reference node. /// For namespaces and types, this corresponds to values from <see cref="TypeOrNamespaceUsageInfo"/>. /// For methods, fields, properties, events, locals and parameters, this corresponds to values from <see cref="ValueUsageInfo"/>. /// </summary> [DataContract] internal readonly record struct SymbolUsageInfo { public static readonly SymbolUsageInfo None = Create(ValueUsageInfo.None); [DataMember(Order = 0)] public ValueUsageInfo? ValueUsageInfoOpt { get; } [DataMember(Order = 1)] public TypeOrNamespaceUsageInfo? TypeOrNamespaceUsageInfoOpt { get; } // Must be public since it's used for deserialization. public SymbolUsageInfo(ValueUsageInfo? valueUsageInfoOpt, TypeOrNamespaceUsageInfo? typeOrNamespaceUsageInfoOpt) { Debug.Assert(valueUsageInfoOpt.HasValue ^ typeOrNamespaceUsageInfoOpt.HasValue); ValueUsageInfoOpt = valueUsageInfoOpt; TypeOrNamespaceUsageInfoOpt = typeOrNamespaceUsageInfoOpt; } public static SymbolUsageInfo Create(ValueUsageInfo valueUsageInfo) => new(valueUsageInfo, typeOrNamespaceUsageInfoOpt: null); public static SymbolUsageInfo Create(TypeOrNamespaceUsageInfo typeOrNamespaceUsageInfo) => new(valueUsageInfoOpt: null, typeOrNamespaceUsageInfo); public bool IsReadFrom() => ValueUsageInfoOpt.HasValue && ValueUsageInfoOpt.Value.IsReadFrom(); public bool IsWrittenTo() => ValueUsageInfoOpt.HasValue && ValueUsageInfoOpt.Value.IsWrittenTo(); } |