// 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.
 
namespace Microsoft.CodeAnalysis.Shared.Utilities
{
    internal interface ISpeculationAnalyzer
    {
        /// <summary>
        /// The original expression that is being replaced by <see cref="ReplacedExpression"/>.  This will be in the
        /// <see cref="SemanticModel.SyntaxTree"/> that <see cref="OriginalSemanticModel"/> points at.
        /// </summary>
        SyntaxNode OriginalExpression { get; }
 
        /// <summary>
        /// The new node that <see cref="OriginalExpression"/>n was replaced with.  This will be in the <see
        /// cref="SemanticModel.SyntaxTree"/> that <see cref="SpeculativeSemanticModel"/> points at.
        /// </summary>
        SyntaxNode ReplacedExpression { get; }
 
        /// <summary>
        /// The original semantic model that <see cref="OriginalExpression"/> was contained in.
        /// </summary>
        SemanticModel OriginalSemanticModel { get; }
 
        /// <summary>
        /// A forked semantic model off of <see cref="OriginalSemanticModel"/>.  In that model <see
        /// cref="OriginalExpression"/> will have been replaced with <see cref="ReplacedExpression"/>.
        /// </summary>
        SemanticModel SpeculativeSemanticModel { get; }
    }
}