ILAttributes

A collection of attributes for UnityEngine to write functions which can only be expressed by IL.

How to install

First put 'corepath.txt' file in the project folder and write its runtime mscorlib.dll path in it (e.g.C:\Program Files\Unity\Hub\Editor\2022.3.17f1\Editor\Data\MonoBleedingEdge\lib\mono\unityjit-win32\mscorlib.dll)

Package Manager

1. Open the Package Manager by going to Window > Package Manager.
2. Click on the "+" button and select "Add package from git URL".
3. Enter the following URL:

https://github.com/Akeit0/ILAttributes.git?path=/ILAttributesUnity/Assets/ILAttributes

manifest.json

Open Packages/manifest.json and add the following in the dependencies block:

"com.akeit0.il-attributes": "https://github.com/Akeit0/ILAttributes.git?path=/ILAttributesUnity/Assets/ILAttributes"

Contents

To use ILAttributes you need to add [ILAttributes.ILProcess] attribute to the class.

Private Proxy

Allow 'unsafe' Code` is needed to access non public members.

Unity compatible version of https://github.com/Cysharp/PrivateProxy But this library supports static classes, generic classes and generic methods. Generic methods of generic class is not supported. Please see here first.

using ILAttributs.PrivateProxy;//Name space is different
public static class SampleStatic//Static class is supported
{
    static int _field1;
    static void GenericFuga<T>() where T:System.IDisposable{}//Generic method is supported with constraints
}
public struct SampleGeneric<T>where T:class//Generic class/struct is supported with constraints
{
    T _field1;
}
[GeneratePrivateProxy(typeof(SampleStatic))]
public partial struct SampleStaticProxy{};
[GeneratePrivateProxy(typeof(SampleGeneric<>))]
public ref partial  struct SampleGenericProxy<T>{};

ILUnsafeAccessor

This is almost same as UnsafeAccessor in .NET8 but available in Unity.

using System;
using System.Runtime.CompilerServices;
using ILAttributes;
public class Class
{
    static void StaticPrivateMethod() { }
    static void StaticPrivateGenericMethod<T>() { }
    static int StaticPrivateField;
    Class(int i) { PrivateField = i; }
    void PrivateMethod() { }
    int PrivateField;
    void PrivateGenericMethod<T>() { }
}
public class Class<T>
{
    static void StaticPrivateMethod() { }
    // Not Supported now static void StaticPrivateGenericMethod<T>() { }
    static T StaticPrivateField;
    Class(T i) { PrivateField = i; }
    void PrivateMethod() { }
    T PrivateField;
   // Not Supported now void PrivateGenericMethod<T>() { }
}
[ILProcess]
public class AccessClass{
  public void CallStaticPrivateMethod()
  {
      StaticPrivateMethod(null);
  
      [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticMethod, Name = nameof(StaticPrivateMethod))]
      extern static void StaticPrivateMethod(Class c);
      [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticMethod, Name = nameof(StaticPrivateMethod),typeof(Class))]
      extern static void StaticPrivateMethod();
       [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticMethod, Name = nameof(StaticPrivateGenericMethod))]
      extern static void StaticPrivateGenericMethod<T>(Class c);
      [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticMethod, Name = nameof(StaticPrivateGenericMethod),typeof(Class))]
      extern static void StaticPrivateGenericMethod<T>();
  }
  public void GetSetStaticPrivateField()
  {
      ref int f = ref GetSetStaticPrivateField(null);
  
  
      [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticField, Name = "StaticPrivateField")]
      extern static ref int GetSetStaticPrivateField(Class c);
      [ILUnsafeAccessor(ILUnsafeAccessorKind.StaticField, Name = "StaticPrivateField",typeof(Class))]
      extern static ref int GetSetStaticPrivateField();
  }
  public void CallPrivateConstructor()
  {
      Class c1 = PrivateCtor(1);
  
      Class c2 = (Class)RuntimeHelpers.GetUninitializedObject(typeof(Class));
  
      PrivateCtorAsMethod(c2, 2);
  
  
      [UnsafeAccessor(UnsafeAccessorKind.Constructor)]
      extern static Class PrivateCtor(int i);
  
      [UnsafeAccessor(UnsafeAccessorKind.Method, Name = ".ctor")]
      extern static void PrivateCtorAsMethod(Class c, int i);
  
  }
  public void CallPrivateMethod(Class c)
  {
      PrivateMethod(c);
  
      [ILUnsafeAccessor(ILUnsafeAccessorKind.Method, Name = nameof(PrivateMethod))]
      extern static void PrivateMethod(Class c);
      [ILUnsafeAccessor(ILUnsafeAccessorKind.Method, Name = nameof(PrivateGenericMethod))]
      extern static void PrivateGenericMethod<T>(Class c);
  }
  public void GetSetPrivateField(Class c)
  {
      ref int f = ref GetSetPrivateField(c);
  
  
      [ILUnsafeAccessor(ILUnsafeAccessorKind.Field, Name = "PrivateField")]
      extern static ref int GetSetPrivateField(Class c);
  }
}

ILRetIdentity

This just returns first argument.

[ILProcess]
public class UnsafeClass{
  [ILRetIdentity]
  public static extern ref T AsRef<T>(in T value);
  [ILRetIdentity]
  public static extern  T As<T>(object obj)where T:class;
  [ILRetIdentity]
  public static extern  ref TRet AsRef<TSource,TRet>(ref TSource source);
  [ILRetIdentity]
  public static extern  ref Span<TRet> AsRef<TSource,TRet>(ref ref Span<TSource> source);
}

Experimantal

ILInline

InlineIL Supports limited opcodes.

[ILProcess]
public class UnsafeClass{

  [Experimental.ILInline("ldarg.0  ldarg.1 sizeof !!T mul add ret")]
  public static extern  ref T Add<T>(ref  T pointer,nint offset);

  [Experimental.ILInline("ldarg.0  ldarg.1 add ret")]
  public static extern  ref T AddByteOffset<T>(ref  T pointer,nint offset);


  [Experimental.ILInline("ldarg.0 conv.u ret")]
  public static extern ref byte  AsRef<T>( T pointer)where T:class;


  [Experimental.ILInline("sizeof !!T ret")]
  public static extern int SizeOf<T>();
  
  [Experimental.ILInline("ret")]
  public static extern void SkipInit<T>(out T value);
  
  [Experimental.ILInline("ldarg.0 ldarg.1 ldarg.2 cpblk ret")]
  public static extern void CopyBlock(ref byte destination, ref byte source, uint byteCount);
        
}

LICENCE

This library is licensed under the MIT licence.