A Programmer with Microsoft tools

RSCG – Dusharp
 
 

Generate tagged union

This is how you can use Dusharp .

The code that you start with is

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>

	<ItemGroup>
	  <PackageReference Include="Dusharp" Version="0.4.0">
	    <PrivateAssets>all</PrivateAssets>
	    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
	  </PackageReference>
	</ItemGroup>

	

</Project>

The code that you will use is

using UnionTypesDemo;

Console.WriteLine("Save or not");
var data = SaveToDatabase.Save(0);
data.Match(
    ok => Console.WriteLine(ok),
    ()=> Console.WriteLine("Not found")
);

data = SaveToDatabase.Save(1);
data.Match(
    ok => Console.WriteLine(ok),
    () => Console.WriteLine("Not found")
);

using Dusharp;
namespace UnionTypesDemo;


[Union]
public partial class ResultSave
{
    [UnionCase]
    public static partial ResultSave Ok(int i);
    [UnionCase]
    public static partial ResultSave NotFound();
    
}

namespace UnionTypesDemo;

public class SaveToDatabase
{
    public static ResultSave Save(int i)
    {

        if (i == 0)
        {
            return ResultSave.NotFound();
        }
        return ResultSave.Ok(i); ;
    }
}

The code that is generated is

// <auto-generated> This file has been auto generated. </auto-generated>
#nullable enable
using System;
using System.Runtime.CompilerServices;

namespace Dusharp
{
	public static class ExceptionUtils
	{
		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static void ThrowIfNull<T>(this T value, string paramName)
			where T : class
		{
			if (value == null)
			{
				ThrowArgumentNull(paramName);
			}
		}

		[MethodImpl(MethodImplOptions.NoInlining)]
		public static void ThrowUnionInInvalidState() =>
			throw new InvalidOperationException("Union in invalid state.");

		[MethodImpl(MethodImplOptions.NoInlining)]
		private static void ThrowArgumentNull(string paramName) => throw new ArgumentNullException(paramName);
	}
}

// <auto-generated> This file has been auto generated. </auto-generated>
#nullable enable
using System;

namespace Dusharp
{
	[AttributeUsage(AttributeTargets.Class)]
	public sealed class UnionAttribute : Attribute
	{
	}
}

// <auto-generated> This file has been auto generated. </auto-generated>
#nullable enable
using System;

namespace Dusharp
{
	[AttributeUsage(AttributeTargets.Method)]
	public sealed class UnionCaseAttribute : Attribute
	{
	}
}

// <auto-generated> This file has been auto generated. </auto-generated>
#nullable enable
namespace UnionTypesDemo
{
	[System.Diagnostics.CodeAnalysis.SuppressMessage("", "CA1000", Justification = "For generic unions.")]
	abstract partial class ResultSave : System.IEquatable<ResultSave>
	{
		private ResultSave() {}

		public void Match(System.Action<int> okCase, System.Action notFoundCase)
		{
			Dusharp.ExceptionUtils.ThrowIfNull(okCase, "okCase");
			Dusharp.ExceptionUtils.ThrowIfNull(notFoundCase, "notFoundCase");

			{
				var unionCase = this as OkCase;
				if (!object.ReferenceEquals(unionCase, null)) { okCase(unionCase.i); return; }
			}

			{
				var unionCase = this as NotFoundCase;
				if (!object.ReferenceEquals(unionCase, null)) { notFoundCase(); return; }
			}

			Dusharp.ExceptionUtils.ThrowUnionInInvalidState();
		}

		public TRet Match<TRet>(System.Func<int, TRet> okCase, System.Func<TRet> notFoundCase)
		{
			Dusharp.ExceptionUtils.ThrowIfNull(okCase, "okCase");
			Dusharp.ExceptionUtils.ThrowIfNull(notFoundCase, "notFoundCase");

			{
				var unionCase = this as OkCase;
				if (!object.ReferenceEquals(unionCase, null)) { return okCase(unionCase.i); }
			}

			{
				var unionCase = this as NotFoundCase;
				if (!object.ReferenceEquals(unionCase, null)) { return notFoundCase(); }
			}

			Dusharp.ExceptionUtils.ThrowUnionInInvalidState();
			return default!;
		}

		public void Match<TState>(TState state, System.Action<TState, int> okCase, System.Action<TState> notFoundCase)
		{
			Dusharp.ExceptionUtils.ThrowIfNull(okCase, "okCase");
			Dusharp.ExceptionUtils.ThrowIfNull(notFoundCase, "notFoundCase");

			{
				var unionCase = this as OkCase;
				if (!object.ReferenceEquals(unionCase, null)) { okCase(state, unionCase.i); return; }
			}

			{
				var unionCase = this as NotFoundCase;
				if (!object.ReferenceEquals(unionCase, null)) { notFoundCase(state); return; }
			}

			Dusharp.ExceptionUtils.ThrowUnionInInvalidState();
		}

		public TRet Match<TState, TRet>(TState state, System.Func<TState, int, TRet> okCase, System.Func<TState, TRet> notFoundCase)
		{
			Dusharp.ExceptionUtils.ThrowIfNull(okCase, "okCase");
			Dusharp.ExceptionUtils.ThrowIfNull(notFoundCase, "notFoundCase");

			{
				var unionCase = this as OkCase;
				if (!object.ReferenceEquals(unionCase, null)) { return okCase(state, unionCase.i); }
			}

			{
				var unionCase = this as NotFoundCase;
				if (!object.ReferenceEquals(unionCase, null)) { return notFoundCase(state); }
			}

			Dusharp.ExceptionUtils.ThrowUnionInInvalidState();
			return default!;
		}

		public virtual bool Equals(ResultSave? other) { return object.ReferenceEquals(this, other); }
		public override bool Equals(object? other) { return object.ReferenceEquals(this, other); }
		public override int GetHashCode() { return System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(this); }
		public static bool operator ==(ResultSave? left, ResultSave? right)
		{
			return !object.ReferenceEquals(left, null) ? left.Equals(right) : object.ReferenceEquals(left, right);
		}

		public static bool operator !=(ResultSave? left, ResultSave? right)
		{
			return !object.ReferenceEquals(left, null) ? !left.Equals(right) : !object.ReferenceEquals(left, right);
		}

		private sealed class OkCase : ResultSave
		{
			public readonly int i;
			public OkCase(int i)
			{
				this.i = i;
			}

			public override string ToString()
			{
				return $"Ok {{ i = {i} }}";
			}

			public override bool Equals(ResultSave? other)
			{
				if (object.ReferenceEquals(this, other)) return true;
				var otherCasted = other as OkCase;
				if (object.ReferenceEquals(otherCasted, null)) return false;
				return StructuralEquals(otherCasted);
			}

			public override bool Equals(object? other)
			{
				if (object.ReferenceEquals(this, other)) return true;
				var otherCasted = other as OkCase;
				if (object.ReferenceEquals(otherCasted, null)) return false;
				return StructuralEquals(otherCasted);
			}

			public override int GetHashCode()
			{
				unchecked { return System.Collections.Generic.EqualityComparer<int>.Default.GetHashCode(i!) * -1521134295 + "Ok".GetHashCode(); }
			}

			private bool StructuralEquals(OkCase other)
			{
				return System.Collections.Generic.EqualityComparer<int>.Default.Equals(i, other.i);
			}
		}

		public static partial ResultSave Ok(int i)
		{
			return new OkCase(i);
		}

		private sealed class NotFoundCase : ResultSave
		{
			public static readonly NotFoundCase Instance = new NotFoundCase();
			public NotFoundCase()
			{
			}

			public override string ToString()
			{
				return "NotFound";
			}
		}

		public static partial ResultSave NotFound()
		{
			return NotFoundCase.Instance;
		}
	}
}

// <auto-generated/>

#nullable enable

using Sera.TaggedUnion;

namespace UnionTypesDemo {

public partial struct ResultSave
    : global::Sera.TaggedUnion.ITaggedUnion
    , global::System.IEquatable<ResultSave>
    , global::System.IComparable<ResultSave>
#if NET7_0_OR_GREATER
    , global::System.Numerics.IEqualityOperators<ResultSave, ResultSave, bool>
    , global::System.Numerics.IComparisonOperators<ResultSave, ResultSave, bool>
#endif
{
    private __impl_ _impl;
    private ResultSave(__impl_ _impl) { this._impl = _impl; }

    public readonly Tags Tag
    {
        [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
        get => this._impl._tag;
    }

    public enum Tags : byte
    {
        Ok = 1,
        NotFound = 2,
    }

    [global::System.Runtime.CompilerServices.CompilerGenerated]
    private struct __impl_
    {
        public __unmanaged_ _unmanaged_;
        public readonly Tags _tag;

        [global::System.Runtime.CompilerServices.CompilerGenerated]
        [global::System.Runtime.InteropServices.StructLayout(global::System.Runtime.InteropServices.LayoutKind.Explicit)]
        internal struct __unmanaged_
        {
            [global::System.Runtime.InteropServices.FieldOffset(0)]
            public int _0;
        }

        public __impl_(Tags _tag)
        {
            global::System.Runtime.CompilerServices.Unsafe.SkipInit(out this._unmanaged_);
            this._tag = _tag;
        }
    }

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static ResultSave MakeOk(int value)
    {
        var _impl = new __impl_(Tags.Ok);
        _impl._unmanaged_._0 = value;
        return new ResultSave(_impl);
    }
    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static ResultSave MakeNotFound()
    {
        var _impl = new __impl_(Tags.NotFound);
        return new ResultSave(_impl);
    }

    public readonly bool IsOk
    {
        [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
        get => this._impl._tag == Tags.Ok;
    }
    public readonly bool IsNotFound
    {
        [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
        get => this._impl._tag == Tags.NotFound;
    }

    public int Ok
    {
        [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
        readonly get => !this.IsOk ? default! : this._impl._unmanaged_._0!;
        [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
        set { if (this.IsOk) { this._impl._unmanaged_._0 = value; } }
    }

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public readonly bool Equals(ResultSave other) => this.Tag != other.Tag ? false : this.Tag switch
    {
        Tags.Ok => global::System.Collections.Generic.EqualityComparer<int>.Default.Equals(this.Ok, other.Ok),
        _ => true,
    };

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public readonly override int GetHashCode() => this.Tag switch
    {
        Tags.Ok => global::System.HashCode.Combine(this.Tag, this.Ok),
        _ => global::System.HashCode.Combine(this.Tag),
    };

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public readonly override bool Equals(object? obj) => obj is ResultSave other && Equals(other);

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator ==(ResultSave left, ResultSave right) => Equals(left, right);
    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator !=(ResultSave left, ResultSave right) => !Equals(left, right);

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public readonly int CompareTo(ResultSave other) => this.Tag != other.Tag ? global::System.Collections.Generic.Comparer<Tags>.Default.Compare(this.Tag, other.Tag) : this.Tag switch
    {
        Tags.Ok => global::System.Collections.Generic.Comparer<int>.Default.Compare(this.Ok, other.Ok),
        _ => 0,
    };

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator <(ResultSave left, ResultSave right) => left.CompareTo(right) < 0;
    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator >(ResultSave left, ResultSave right) => left.CompareTo(right) > 0;
    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator <=(ResultSave left, ResultSave right) => left.CompareTo(right) <= 0;
    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public static bool operator >=(ResultSave left, ResultSave right) => left.CompareTo(right) >= 0;

    [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    public readonly override string ToString() => this.Tag switch
    {
        Tags.Ok => $"{nameof(ResultSave)}.{nameof(Tags.Ok)} {{ {this.Ok} }}",
        Tags.NotFound => $"{nameof(ResultSave)}.{nameof(Tags.NotFound)}",
        _ => nameof(ResultSave),
    };
}

} // namespace UnionTypesDemo

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/Dusharp

RSCG – LightweightObjectMapper
 
 

Generating function to map DTOs

This is how you can use LightweightObjectMapper .

The code that you start with is

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>

	<ItemGroup>
	  <PackageReference Include="LightweightObjectMapper" Version="1.0.2" />
	</ItemGroup>

	<!--<PropertyGroup>
		<NoLightweightObjectMapperPreCodes>true</NoLightweightObjectMapperPreCodes>
		<LOMappingMethodAccessibility>public</LOMappingMethodAccessibility>
	</PropertyGroup>-->

	
</Project>

The code that you will use is

using mapperDemo;
using LightweightObjectMapper;
var p=new Person();
p.FirstName = "Andrei";
p.LastName = "Ignat";
PersonDTO dto= p.MapTo<PersonDTO>();
Console.WriteLine(dto.FullName);

public partial class Person
{
    public int ID { get; set; }
    public string? FirstName { get; set; }
    public string? LastName { get; set; }
}

namespace mapperDemo;
public partial class PersonDTO
{
    public int ID { get; set; }
    public string? FirstName { get; set; }
    public string? LastName { get; set; }
    public string FullName { 
        get
        {
            return FirstName + " " + LastName;
        }
    }
}

using LightweightObjectMapper;
using System;
namespace mapperDemo;

[MappingProfile]
internal partial class Extensions:
    IPostMapping<Person, PersonDTO>
{
    

    public PersonDTO PostMapping(Person source, PersonDTO target)
    {
        target.ID = source.ID;
        return target;
    }
}

The code that is generated is

// <Auto-Generated/>
#pragma warning disable IDE0005
#pragma warning disable CS0105
using LightweightObjectMapper;
using System;
using System;
using System.Linq;
using System.Runtime.CompilerServices;

namespace mapperDemo
{
    sealed partial class Extensions
    {
        public static partial class Generated
        {
            /// <summary>
            /// PostMappingDeclaration for <see cref = "global::Person"/> to <see cref = "global::mapperDemo.PersonDTO"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.PostMappingDeclaration, typeof(global::Person), typeof(global::mapperDemo.PersonDTO))]
            public static global::mapperDemo.PersonDTO PostMapping_D275C37F33F4AFBD(global::Person source, global::mapperDemo.PersonDTO target)
            {
                target.ID = source.ID;
                return target;
            }
        }
    }
}

#if !NO_LIGHTWEIGHT_OBJECT_MAPPER_PRE_CODES

// <Auto-Generated/>

#pragma warning disable IDE0161 // 转换为文件范围限定的 namespace

using System;
using System.Collections.Generic;

namespace LightweightObjectMapper
{
    /// <summary>
    /// 映射配置接口
    /// </summary>
    internal interface IMappingProfile { }

    /// <summary>
    /// 映射后执行的动作
    /// </summary>
    /// <typeparam name="TIn"></typeparam>
    /// <typeparam name="TOut"></typeparam>
    internal interface IPostMapping<TIn, TOut> : IMappingProfile
    {
        /// <summary>
        /// 映射后执行的动作
        /// </summary>
        /// <param name="source"></param>
        /// <param name="target"></param>
        /// <returns></returns>
        TOut PostMapping(TIn source, TOut target);
    }

    /// <summary>
    /// 映射前准备
    /// </summary>
    /// <typeparam name="TIn"></typeparam>
    /// <typeparam name="TOut"></typeparam>
    internal interface IMappingPrepare<TIn, TOut> : IMappingProfile
    {
        /// <summary>
        /// 映射前准备
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        TOut MappingPrepare(TIn source);
    }

    /// <summary>
    /// 接管完整的类型映射（仅非目标实例映射）
    /// </summary>
    /// <typeparam name="TIn"></typeparam>
    /// <typeparam name="TOut"></typeparam>
    internal interface ITypeMapping<TIn, TOut> : IMappingProfile
    {
        /// <summary>
        /// 接管完整的类型映射（仅非目标实例映射）
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        TOut TypeMapping(TIn source);
    }

    /// <summary>
    /// 类型成员忽略映射
    /// </summary>
    /// <typeparam name="T"></typeparam>
    internal interface ITypeMemberIgnoreMapping<T> : IMappingProfile
    {
        /// <summary>
        /// 类型成员忽略映射<br/>
        /// 方法体内访问过的 <paramref name="target"/> 所有成员，将在映射时被忽略
        /// </summary>
        /// <param name="target"></param>
        /// <returns></returns>
        object? IgnoreMapping(T target);
    }

    /// <summary>
    /// 标记一个方法为集合映射方法<br/>
    /// 集合映射方法应包含唯一泛型参数 T ，以及唯一参数 <see cref="IEnumerable{T}"/> ，返回类型应该为 <see cref="IEnumerable{T}"/> 的派生类型
    /// </summary>
    [AttributeUsage(AttributeTargets.Method, Inherited = false, AllowMultiple = false)]
    internal sealed class CollectionMappingAttribute : Attribute
    {
    }

    /// <summary>
    /// 标记类为映射配置类
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
    internal sealed class MappingProfileAttribute : Attribute
    {
        /// <inheritdoc cref="MappingProfileAttribute"/>
        public MappingProfileAttribute() { }
    }

    /// <summary>
    /// 映射元数据
    /// </summary>
    [AttributeUsage(AttributeTargets.All, Inherited = false, AllowMultiple = true)]
    internal sealed class MappingMetadataAttribute : Attribute
    {
        /// <inheritdoc cref="MappingMetadataAttribute"/>
        public MappingMetadataAttribute(MappingMetadataType type, params object[] data) { }
    }

    /// <summary>
    /// 映射元数据类型
    /// </summary>
    internal enum MappingMetadataType
    {
        /// <summary>
        /// 声明 MappingPrepare
        /// </summary>
        MappingPrepareDeclaration,

        /// <summary>
        /// 声明 PostMapping
        /// </summary>
        PostMappingDeclaration,

        /// <summary>
        /// 声明 TypeMapping
        /// </summary>
        TypeMappingDeclaration,

        /// <summary>
        /// 声明 CollectionMapping
        /// </summary>
        CollectionMappingDeclaration,

        /// <summary>
        /// 忽略成员声明
        /// </summary>
        IgnoreMembersDeclaration,

        /// <summary>
        /// 类型忽略成员声明
        /// </summary>
        TypeIgnoreMembersDeclaration,
    }

    /// <summary>
    /// 引用其它映射配置类
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
    internal sealed class MappingProfileIncludeAttribute : Attribute
    {
        /// <inheritdoc cref="MappingProfileIncludeAttribute"/>
        public MappingProfileIncludeAttribute(params Type[] profileTypes) { }
    }

    /// <summary>
    /// 对象映射 MapTo 占位方法
    /// </summary>
    [Obsolete("Do not use the placeholder extension class.", true)]
    internal static class LightweightObjectMapperPlaceholderExtensions
    {
        private const string ErrorCallPlaceholderMethodMessage = "Do not use the placeholder extension method. If not redirect to the right mapper extension method please try fix other errors and rebuild the project.";

        /// <summary>
        /// 对象映射 MapTo 占位方法<br/>
        /// 生成 无需目标对象 的泛型映射方法，映射到 <typeparamref name="TOut"/>
        /// </summary>
        /// <typeparam name="TOut"></typeparam>
        /// <param name="source"></param>
        /// <returns></returns>
        [Obsolete(ErrorCallPlaceholderMethodMessage, true)]
        public static TOut MapTo<TOut>(this object source)
        {
            throw new NotImplementedException();
        }

        /// <summary>
        /// 对象映射 MapTo 占位方法<br/>
        /// 生成 需要目标对象 的泛型映射方法，映射到 <typeparamref name="TOut"/>
        /// </summary>
        /// <typeparam name="TOut"></typeparam>
        /// <param name="source"></param>
        /// <returns></returns>
        [Obsolete(ErrorCallPlaceholderMethodMessage, true)]
        public static TOut MapTo<TOut>(this object source, TOut target)
        {
            throw new NotImplementedException();
        }

        /// <summary>
        /// 值类型 对象映射 MapTo 占位方法<br/>
        /// 生成 需要目标值类型对象 的泛型映射方法，映射到 <typeparamref name="TOut"/>
        /// </summary>
        /// <typeparam name="TOut"></typeparam>
        /// <param name="source"></param>
        /// <returns></returns>
        [Obsolete(ErrorCallPlaceholderMethodMessage, true)]
        public static TOut MapTo<TOut>(this object source, ref TOut target)
            where TOut : struct
        {
            throw new NotImplementedException();
        }
    }
}

#endif

#if !NO_LIGHTWEIGHT_OBJECT_MAPPER_PRE_CODES

// <Auto-Generated/>

#pragma warning disable IDE0161 // 转换为文件范围限定的 namespace

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;

namespace LightweightObjectMapper
{
    /// <summary>
    /// 预定义的类型映射
    /// </summary>
    [MappingProfile]
    internal sealed partial class PredefinedSpecialTypeMapping
        : ITypeMapping<int, bool>
        , ITypeMapping<short, bool>
        , ITypeMapping<long, bool>
    {
        public bool TypeMapping(int source)
        {
            return source != 0;
        }

        public bool TypeMapping(short source)
        {
            return source != 0;
        }

        bool ITypeMapping<long, bool>.TypeMapping(long source)
        {
            return source != 0;
        }

        [CollectionMapping]
        public static IEnumerable<T>? ToIEnumerable<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }

        [CollectionMapping]
        public static ICollection<T>? ToICollection<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }

        [CollectionMapping]
        public static IReadOnlyCollection<T>? ToIReadOnlyCollection<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }

        [CollectionMapping]
        public static IList<T>? ToIList<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }

        [CollectionMapping]
        public static IReadOnlyList<T>? ToIReadOnlyList<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }

        [CollectionMapping]
        public static List<T>? ToList<T>(IEnumerable<T>? items)
        {
            return items?.ToList();
        }
    }
}

#endif

// <Auto-Generated/>
#pragma warning disable IDE0005
#pragma warning disable CS0105
using System;
using System.Linq;
using System.Runtime.CompilerServices;

namespace LightweightObjectMapper
{
    internal static partial class LOMMapExtensions_mapperDemo
    {
        /// <summary>
        /// Map <see cref = "global::Person"/> to the following types:<br/>
        /// <see cref = "global::mapperDemo.PersonDTO"/><br/>
        /// </summary>
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static TOut MapTo<TOut>(this global::Person source)
        {
            if (source == null)
            {
                throw new ArgumentNullException(nameof(source));
            }

            if (typeof(TOut) == typeof(global::mapperDemo.PersonDTO))
            {
                var target = new global::mapperDemo.PersonDTO()
                {
                    LastName = source.LastName,
                    ID = source.ID,
                    FirstName = source.FirstName,
                };
                target = global::mapperDemo.Extensions.Generated.PostMapping_D275C37F33F4AFBD(source, target);
                return (TOut)(target as object);
            }

            throw new global::System.NotImplementedException($"No mapping code for {typeof(TOut)}.");
        }
    }
}

// <Auto-Generated/>
#pragma warning disable IDE0005
#pragma warning disable CS0105
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System;
using System.Linq;
using System.Runtime.CompilerServices;

namespace LightweightObjectMapper
{
    sealed partial class PredefinedSpecialTypeMapping
    {
        public static partial class Generated
        {
            /// <summary>
            /// TypeMappingDeclaration for <see cref = "int "/> to <see cref = "bool "/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.TypeMappingDeclaration, typeof(int), typeof(bool))]
            public static bool TypeMapping_A07AFC9A322FFA04(int source)
            {
                return source != 0;
            }

            /// <summary>
            /// TypeMappingDeclaration for <see cref = "short "/> to <see cref = "bool "/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.TypeMappingDeclaration, typeof(short), typeof(bool))]
            public static bool TypeMapping_946949E7222BC174(short source)
            {
                return source != 0;
            }

            /// <summary>
            /// TypeMappingDeclaration for <see cref = "long "/> to <see cref = "bool "/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.TypeMappingDeclaration, typeof(long), typeof(bool))]
            public static bool TypeMapping_3C4D395B4EF43E87(long source)
            {
                return source != 0;
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.IEnumerable{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.IEnumerable<>))]
            public static global::System.Collections.Generic.IEnumerable<T> CollectionMapping_CEFAD35E246FD0F7<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.ICollection{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.ICollection<>))]
            public static global::System.Collections.Generic.ICollection<T> CollectionMapping_37FFD1A2226B51E9<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.IReadOnlyCollection{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.IReadOnlyCollection<>))]
            public static global::System.Collections.Generic.IReadOnlyCollection<T> CollectionMapping_AF82A9960EE0C495<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.IList{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.IList<>))]
            public static global::System.Collections.Generic.IList<T> CollectionMapping_284BCB723CA17B0E<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.IReadOnlyList{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.IReadOnlyList<>))]
            public static global::System.Collections.Generic.IReadOnlyList<T> CollectionMapping_976EA1DB5B772C59<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }

            /// <summary>
            /// CollectionMappingDeclaration for <see cref = "global::System.Collections.Generic.List{T}"/>
            /// </summary>
            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            [MappingMetadata(MappingMetadataType.CollectionMappingDeclaration, typeof(global::System.Collections.Generic.List<>))]
            public static global::System.Collections.Generic.List<T> CollectionMapping_070F0D0F908DAF14<T>(global::System.Collections.Generic.IEnumerable<T> items)
            {
                return items?.ToList();
            }
        }
    }
}

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/LightweightObjectMapper

RSCG – Enhanced.GetTypes
 
 

Generating list of PUBLIC classes that implements an interface

This is how you can use Enhanced.GetTypes .

The code that you start with is

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Enhanced.GetTypes" Version="1.0.0" />
  </ItemGroup>
	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>
</Project>

The code that you will use is

// See https://aka.ms/new-console-template for more information
using GetTypesForInterface;

Console.WriteLine("Hello, World!");
foreach (var type in ProjectTypes.GetIPersonTypes())
{
    Console.WriteLine(type.Name);
}

using Enhanced.GetTypes.Annotation;

namespace GetTypesForInterface;
public partial class ProjectTypes
{
    [DerivedTypes(typeof(IPerson))]
    public  static partial IEnumerable<Type> GetIPersonTypes();
}

namespace GetTypesForInterface;
internal interface IPerson
{
    public string Name { get; set; }
}

namespace GetTypesForInterface;
public class Student : IPerson
{
    public string Name { get; set; } = "";
}
    

namespace GetTypesForInterface;
public class Teacher:IPerson
{
    public string Name { get; set; } = "";
}

The code that is generated is

// <auto-generated />
namespace GetTypesForInterface
{
    partial class ProjectTypes
    {
        public static partial System.Collections.Generic.IEnumerable<System.Type> GetIPersonTypes()
        {
            yield return typeof(GetTypesForInterface.Student);
            yield return typeof(GetTypesForInterface.Teacher);
            yield break;
        }
    }
}

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/Enhanced.GetTypes

RSCG – Immediate.Handlers
 
 

Generating mediator like handlers

This is how you can use Immediate.Handlers .

The code that you start with is

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>
	<ItemGroup>
		<PackageReference Include="Immediate.Handlers" Version="1.6.1" />
		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />		
	</ItemGroup>

</Project>

The code that you will use is

Console.WriteLine("Hello, World!");
ServiceCollection services = new ();
services.AddSingleton<ILoggerFactory, NullLoggerFactory>();
services.AddSingleton(typeof(ILogger<>), typeof(NullLogger<>));
services.AddHandlers();
services.AddBehaviors();
IHandler<Ping, Pong> handler = services.BuildServiceProvider().GetRequiredService<IHandler<Ping, Pong>>();
var id = Guid.NewGuid();
var request = new Ping(id);
var pong = await handler.HandleAsync(request, CancellationToken.None);
Console.WriteLine($"Got pong with id {pong.Id}!");

using Immediate.Handlers.Shared;

public sealed record Ping(Guid Id);// : IRequest<Pong>;

public sealed record Pong(Guid Id);


[Handler]
[Behaviors(
    typeof(LoggingBehavior<,>)
)]
public static partial class PingHandler //: IPipelineAction<Ping, Pong>
{

    private static async ValueTask<Pong> HandleAsync(Ping request, CancellationToken token)
    {
        await Task.Delay(1000);
        Console.WriteLine("Returning pong!");
        return new Pong(request.Id);
    }
}

public sealed class LoggingBehavior<TRequest, TResponse>(ILogger<LoggingBehavior<TRequest, TResponse>>? logger)
    : Behavior<TRequest, TResponse>
{
    public override async ValueTask<TResponse> HandleAsync(TRequest request, CancellationToken cancellationToken)
    {
        Console.WriteLine("I am a logging behaviour");
        logger?.LogInformation("LoggingBehavior.Enter");
        var response = await Next(request, cancellationToken);
        logger?.LogInformation("LoggingBehavior.Exit");
        return response;
    }
}

global using Microsoft.Extensions.DependencyInjection;
global using Immediate.Handlers.Shared;
global using Microsoft.Extensions.Logging;
global using Mediator;
global using Microsoft.Extensions.Logging.Abstractions;

The code that is generated is

using Microsoft.Extensions.DependencyInjection;

#pragma warning disable CS1591

partial class PingHandler
{
	public sealed partial class Handler : global::Immediate.Handlers.Shared.IHandler<global::Ping, global::Pong>
	{
		private readonly global::PingHandler.HandleBehavior _handleBehavior;
		private readonly global::LoggingBehavior<global::Ping, global::Pong> _loggingBehavior;

		public Handler(
			global::PingHandler.HandleBehavior handleBehavior,
			global::LoggingBehavior<global::Ping, global::Pong> loggingBehavior
		)
		{
			var handlerType = typeof(PingHandler);

			_handleBehavior = handleBehavior;

			_loggingBehavior = loggingBehavior;
			_loggingBehavior.HandlerType = handlerType;

			_loggingBehavior.SetInnerHandler(_handleBehavior);
		}

		public async global::System.Threading.Tasks.ValueTask<global::Pong> HandleAsync(
			global::Ping request,
			global::System.Threading.CancellationToken cancellationToken = default
		)
		{
			return await _loggingBehavior
				.HandleAsync(request, cancellationToken)
				.ConfigureAwait(false);
		}
	}

	[global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
	public sealed class HandleBehavior : global::Immediate.Handlers.Shared.Behavior<global::Ping, global::Pong>
	{

		public HandleBehavior(
		)
		{
		}

		public override async global::System.Threading.Tasks.ValueTask<global::Pong> HandleAsync(
			global::Ping request,
			global::System.Threading.CancellationToken cancellationToken
		)
		{
			return await global::PingHandler
				.HandleAsync(
					request
					, cancellationToken
				)
				.ConfigureAwait(false);
		}
	}

	[global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
	public static IServiceCollection AddHandlers(
		IServiceCollection services,
		ServiceLifetime lifetime = ServiceLifetime.Scoped
	)
	{
		services.Add(new(typeof(global::PingHandler.Handler), typeof(global::PingHandler.Handler), lifetime));
		services.Add(new(typeof(global::Immediate.Handlers.Shared.IHandler<global::Ping, global::Pong>), typeof(global::PingHandler.Handler), lifetime));
		services.Add(new(typeof(global::PingHandler.HandleBehavior), typeof(global::PingHandler.HandleBehavior), lifetime));
		return services;
	}
}

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;

#pragma warning disable CS1591

namespace Mediator;

public static class HandlerServiceCollectionExtensions
{
	public static IServiceCollection AddBehaviors(
		this IServiceCollection services)
	{
		services.TryAddTransient(typeof(global::LoggingBehavior<,>));
		
		return services;
	}

	public static IServiceCollection AddHandlers(
		this IServiceCollection services,
		ServiceLifetime lifetime = ServiceLifetime.Scoped
	)
	{
		global::PingHandler.AddHandlers(services, lifetime);
		
		return services;
	}
}

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/Immediate.Handlers