// 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.Runtime.Serialization;

namespace Microsoft.CodeAnalysis.Contracts.EditAndContinue;

/// <summary>
/// Active statement affected by a managed update.
/// This is used when remapping the instruction pointer to the appropriate location.
/// </summary>
/// <remarks>
/// Creates a ManagedActiveStatementUpdate.
/// </remarks>
/// <param name="method">Method information before the change was made.</param>
/// <param name="ilOffset">Old IL offset of the active statement.</param>
/// <param name="newSpan">Updated text span for the active statement.</param>
[DataContract]
internal readonly struct ManagedActiveStatementUpdate(
    ManagedModuleMethodId method,
    int ilOffset,
    SourceSpan newSpan)
{

    /// <summary>
    /// Method ID. It has the token for the method that contains the active statement
    /// and the version when the change was made.
    /// </summary>
    [DataMember(Name = "method")]
    public ManagedModuleMethodId Method { get; } = method;

    /// <summary>
    /// Old IL offset for the active statement.
    /// </summary>
    [DataMember(Name = "ilOffset")]
    public int ILOffset { get; } = ilOffset;

    /// <summary>
    /// Updated text span for the active statement after the edit was made.
    /// </summary>
    [DataMember(Name = "newSpan")]
    public SourceSpan NewSpan { get; } = newSpan;
}