|
// 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 Roslyn.Utilities;
using System;
namespace Microsoft.CodeAnalysis.CSharp
{
/// <summary>
/// Semantic information associated with a query clause in a C# query expression.
/// </summary>
public readonly struct QueryClauseInfo : IEquatable<QueryClauseInfo>
{
private readonly SymbolInfo _castInfo;
private readonly SymbolInfo _operationInfo;
internal QueryClauseInfo(SymbolInfo castInfo, SymbolInfo operationInfo)
{
_castInfo = castInfo;
_operationInfo = operationInfo;
}
/// <summary>
/// The .Cast<T>() operation generated from the query range variable's type restriction,
/// or null if the type restriction isn't specified.
/// </summary>
/// <remarks>
/// The operation, when present is implemented via <see cref="IMethodSymbol"/>.
/// To access the type, when this is non-null use <see cref="IMethodSymbol.TypeArguments"/>[0].
/// If it is an extension method, it is returned in reduced form.
/// </remarks>
public SymbolInfo CastInfo
{
get { return _castInfo; }
}
/// <summary>
/// The operation (e.g. Select(), Where(), etc) that implements the given clause.
/// </summary>
/// <remarks>
/// The clause can be implemented via <see cref="IMethodSymbol"/>, or
/// <see cref="IFieldSymbol"/> or <see cref="IPropertySymbol"/> that return a delegate.
/// If it is an extension method, it is returned in reduced form.
/// </remarks>
public SymbolInfo OperationInfo
{
get { return _operationInfo; }
}
public override bool Equals(object? obj)
{
return obj is QueryClauseInfo && Equals((QueryClauseInfo)obj);
}
public bool Equals(QueryClauseInfo other)
{
return _castInfo.Equals(other._castInfo)
&& _operationInfo.Equals(other._operationInfo);
}
public override int GetHashCode()
{
return Hash.Combine(this.CastInfo.GetHashCode(), _operationInfo.GetHashCode());
}
}
}
|