Generate extension method to fluent set member for class, strcut, interface.

Name	NuGet	MyGet
GodSharp.FluentMember

• Install Package

  <ItemGroup>
    <PackageReference Include="GodSharp.FluentMember" Version="2021.206.26" />
  </ItemGroup>

• Add Attribute

  [FluentMemberGenerator(Partial = true)]
  public partial class User
  {
      public int Id { get; internal set; }
      public int Age { get; set; }
      internal string Name { get; set; }
      public string Secret { get; private set; }
      public Role Role { get; set; } = new();
  
      [FluentMemberGenerator(Partial = true)]
      public partial struct Address
      {
          public string Country { get; set; }
          public string City { get; set; }
          internal string Postcode { get; set; }
          public string Secret { get; private set; }
      }
  }

• Build Project

  You will be use fluent api to set member, like With* and Set method by extension method.

  generated code like this:

  //-----------------------------------------------------------------------   -------
  // <auto-generated>
  //     Generated by SourceGenerator generator at 2022/6/26 15:07:32.
  //     Source: User
  // </auto-generated>
  //------------------------------------------------------------------------------
  
  using System;
  using System.Linq.Expressions;
  using GodSharp.FluentMember;
  
  namespace GodSharpFluentMemberTest;
  
  public partial class User
  {
      internal User WithId(Int32 id)
      {
          this.Id = id;
          return this;
      }
  
      public User WithAge(Int32 age)
      {
          this.Age = age;
          return this;
      }
  
      internal User WithName(String name)
      {
          this.Name = name;
          return this;
      }
  
      public User WithRole(Role role)
      {
          this.Role = role;
          return this;
      }
  
      public User Set<TMember>(Expression<Func<User,TMember>> predicate,  TMember value)
          => TypeSetter.Set(this,predicate,value);
  
  }
  
  public static class UserExtensions
  {
      internal static User WithId(this User user ,Int32 id)
      {
          user.Id = id;
          return user;
      }
  
      public static User WithAge(this User user ,Int32 age)
      {
          user.Age = age;
          return user;
      }
  
      internal static User WithName(this User user ,String name)
      {
          user.Name = name;
          return user;
      }
  
      public static User WithRole(this User user ,Role role)
      {
          user.Role = role;
          return user;
      }
  
      public static User Set<TMember>(this User user,     Expression<Func<User,TMember>> predicate, TMember value)
          => TypeSetter.Set(user, predicate, value);
  
  }

MIT