RSCG – AutoConstructor

RSCG – AutoConstructor
 
 

Generating constructor for class with many properties

This is how you can use AutoConstructor .

The code that you start with is

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

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

	<ItemGroup>
	  <PackageReference Include="AutoConstructor" Version="4.1.1">
	    <PrivateAssets>all</PrivateAssets>
	    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
	  </PackageReference>
	</ItemGroup>
</Project>

The code that you will use is

using QuickConstructorDemo;

var p = new Person("Andrei","Ignat");

Console.WriteLine(p.FullName());

namespace QuickConstructorDemo;

[AutoConstructor]
internal partial class Person
{
    private readonly string FirstName;
    private readonly string? LastName;
    
    public string FullName() => $"{FirstName} {LastName}";
    
}

The code that is generated is

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by the AutoConstructor source generator.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

[System.AttributeUsage(System.AttributeTargets.Class,Inherited = false,AllowMultiple = false)]
internal sealed class AutoConstructorAttribute : System.Attribute
{
}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by the AutoConstructor source generator.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

[System.AttributeUsage(System.AttributeTargets.Field,Inherited = false,AllowMultiple = false)]
internal sealed class AutoConstructorIgnoreAttribute : System.Attribute
{
}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by the AutoConstructor source generator.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

[System.AttributeUsage(System.AttributeTargets.Field,Inherited = false,AllowMultiple = false)]
internal sealed class AutoConstructorInjectAttribute : System.Attribute
{
    public AutoConstructorInjectAttribute(string initializer = null,string parameterName = null,System.Type injectedType = null)
    {
        Initializer = initializer;
        ParameterName = parameterName;
        InjectedType = injectedType;
    }

    public string Initializer { get; }

    public string ParameterName { get; }

    public System.Type InjectedType { get; }
}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by the AutoConstructor source generator.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
#nullable enable
namespace QuickConstructorDemo
{
    partial class Person
    {
        public Person(string FirstName,string? LastName)
        {
            this.FirstName = FirstName;
            this.LastName = LastName;
        }
    }
}

Code and pdf at

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