How to generate Description Attribute for enum by IIncrementalGenerator

[LGinC]

MyState.cs

public enum MyState
{
    /// <summary>
    ///  StartOfWorkflow
    /// </summary>
    Start,

    /// <summary>
    ///  EndOfWorkflow
    /// </summary>
    End,
}

and I want to modify MyState.cs to

public enum MyState
{
    /// <summary>
    ///  StartOfWorkflow
    /// </summary>
    [Description("StartOfWorkflow")]
    Start,

    /// <summary>
    ///  EndOfWorkflow
    /// </summary>
    [Description("EndOfWorkflow")]
    End,
}

just add [Description("xxx")] from comment

how to do this by IIncrementalGenerator？

[CyrusNajmabadi]

You cannot do this. Generators can only add new files. They cannot modify existing files.

[KennethHoff]

What you could do is create the enum in it's entirely. Instead of trying to add something to the enum based on a comment, create the enum from the comment - that'd allow you to add the Attribute