Improve the usability of Result<T, E> and add new job schedule method to EntityQuery.

Added implicate conversion to Result<T, E> and RefResult<T, E>;
Added new ScheduleChunkParallel in EntityQuery;
Remove Ghost.SparseEntity from solution file. It's now completlty replaced by Ghost.Entities;

Ghost.Core/Result.cs

@@ -1,16 +1,16 @@
+using Misaki.HighPerformance.LowLevel;
 using System.Runtime.CompilerServices;
 
 namespace Ghost.Core;
 
 public readonly struct Result
 {
-    private readonly bool _isSuccess;
     private readonly string? _message;
-
-    public readonly bool IsSuccess => _isSuccess;
-    public readonly bool IsFailure => !_isSuccess;
+    private readonly bool _isSuccess;
 
     public readonly string? Message => _message;
+    public readonly bool IsSuccess => _isSuccess;
+    public readonly bool IsFailure => !_isSuccess;
 
     public Result(bool success, string? message = null)
     {
@@ -38,16 +38,10 @@ public readonly struct Result
         return Result<T>.Failure(message);
     }
 
-    public static Result<T, S> Create<T, S>(T value, S status)
-        where S : Enum
+    public void Deconstruct(out bool success, out string? message)
     {
-        return new Result<T, S>(value, status);
-    }
-
-    public static RefResult<T, S> CreateRef<T, S>(ref T value, S status)
-        where S : Enum
-    {
-        return new RefResult<T, S>(ref value, status);
+        success = IsSuccess;
+        message = Message;
     }
 
     public override string ToString() => IsSuccess ? "OK" : $"Error: {Message}";
@@ -57,15 +51,14 @@ public readonly struct Result
 
 public readonly struct Result<T>
 {
-    private readonly bool _isSuccess;
     private readonly T _value;
     private readonly string? _message;
-
-    public readonly bool IsSuccess => _isSuccess;
-    public readonly bool IsFailure => !_isSuccess;
+    private readonly bool _isSuccess;
 
     public readonly T Value => _value;
     public readonly string? Message => _message;
+    public readonly bool IsSuccess => _isSuccess;
+    public readonly bool IsFailure => !_isSuccess;
 
     public Result(bool success, T value, string? message = null)
     {
@@ -84,6 +77,13 @@ public readonly struct Result<T>
         return new Result<T>(false, default!, message);
     }
 
+    public void Deconstruct(out bool success, out T value, out string? message)
+    {
+        success = IsSuccess;
+        value = Value;
+        message = Message;
+    }
+
     public override string ToString() => IsSuccess ? $"OK: {Value}" : $"Error: {Message}";
 
     public static implicit operator Result<T>(T? data) => data is not null ? Success(data) : Failure(null);
@@ -91,9 +91,9 @@ public readonly struct Result<T>
     public static implicit operator bool(Result<T> result) => result.IsSuccess;
 }
 
-public enum ResultStatus : byte
+public enum ErrorStatus : byte
 {
-    Success,
+    None,
     NotFound,
     InvalidArgument,
     InvalidState,
@@ -106,57 +106,97 @@ public enum ResultStatus : byte
     UnknownError
 }
 
-public readonly struct Result<T, S>
-    where S : Enum
+public readonly struct Result<T, E>
+    where E : struct, Enum
 {
     private readonly T _value;
-    private readonly S _status;
+    private readonly E _error;
+    private readonly bool _isSuccess;
 
     public T Value => _value;
-    public S Status => _status;
+    public E Error => _error;
+    public bool IsSuccess => _isSuccess;
+    public bool IsFailure => !_isSuccess;
 
-    public Result(T value, S status)
+    public Result(T value, E status, bool isSuccess)
     {
         _value = value;
-        _status = status;
+        _error = status;
+        _isSuccess = isSuccess;
     }
 
-    public static Result<T, S> Create(T value, S status)
+    public static Result<T, E> Success(T value)
     {
-        return new Result<T, S>(value, status);
+        return new Result<T, E>(value, default, true);
     }
 
-    public override string ToString() => $"Value: {_value}, Status: {_status}";
+    public static Result<T, E> Failure(E status)
+    {
+        return new Result<T, E>(default!, status, false);
+    }
+
+    public void Deconstruct(out bool success, out T value, out E status)
+    {
+        success = IsSuccess;
+        value = Value;
+        status = Error;
+    }
+
+    public override string ToString() => $"Value: {_value}, Status: {_error}";
+
+    public static implicit operator Result<T, E>(T data) => new(data, default, true);
+    public static implicit operator Result<T, E>(E status) => new(default!, status, false);
+    public static implicit operator bool(Result<T, E> result) => result.IsSuccess;
 }
 
-public readonly ref struct RefResult<T, S>
-    where S : Enum
+public readonly ref struct RefResult<T, E>
+    where E : struct, Enum
 {
     private readonly ref T _value;
-    private readonly S _status;
+    private readonly E _error;
+    private readonly bool _isSuccess;
 
     public ref T Value => ref _value;
-    public S Status => _status;
+    public E Error => _error;
+    public bool IsSuccess => _isSuccess;
+    public bool IsFailure => !_isSuccess;
 
-    public RefResult(ref T value, S status)
+    public RefResult(ref T value, E error, bool isSuccess)
     {
         _value = ref value;
-        _status = status;
+        _error = error;
+        _isSuccess = isSuccess;
     }
 
-    public static RefResult<T, S> Create(ref T value, S status)
+    public static RefResult<T, E> Success(ref T value)
     {
-        return new RefResult<T, S>(ref value, status);
+        return new RefResult<T, E>(ref value, default, true);
     }
 
-    public override string ToString() => $"Value: {_value}, Status: {_status}";
+    public static RefResult<T, E> Failure(E error)
+    {
+        return new RefResult<T, E>(ref Unsafe.NullRef<T>(), error, false);
+    }
+
+    public void Deconstruct(out bool success, out Ref<T> value, out E status)
+    {
+        success = IsSuccess;
+        value = new Ref<T>(ref Value);
+        status = Error;
+    }
+
+    public override string ToString() => $"Value: {_value}, Status: {_error}";
+
+    public static implicit operator RefResult<T, E>(Ref<T> data) => new(ref data.Get(), default, true);
+    public static implicit operator RefResult<T, E>(E error) => new(ref Unsafe.NullRef<T>(), error, false);
+    public static implicit operator bool(RefResult<T, E> result) => result.IsSuccess;
 }
 
 public static class ResultExtensions
 {
-    public static void ThrowIfFailed(this ResultStatus result, [CallerArgumentExpression(nameof(result))] string? op = null)
+    public static void ThrowIfFailed(this ErrorStatus result, [CallerArgumentExpression(nameof(result))] string? op = null)
     {
-        if (result != ResultStatus.Success)
+        if (result != ErrorStatus.None)
         {
             throw new InvalidOperationException($"{op} failed: {result}");
         }
@@ -180,12 +220,12 @@ public static class ResultExtensions
         return result.Value;
     }
 
-    public static T GetValueOrThrow<T, S>(this Result<T, S> result, S expect, [CallerArgumentExpression(nameof(result))] string? op = null)
-        where S : Enum
+    public static T GetValueOrThrow<T, S>(this Result<T, S> result, [CallerArgumentExpression(nameof(result))] string? op = null)
+        where S : struct, Enum
     {
-        if (!EqualityComparer<S>.Default.Equals(result.Status, expect))
+        if (!result.IsSuccess)
         {
-            throw new InvalidOperationException($"{op} failed: expected status {expect}, but got {result.Status}");
+            throw new InvalidOperationException($"{op} failed: status {result.Error}");
         }
 
         return result.Value;
@@ -196,10 +236,10 @@ public static class ResultExtensions
         return result.IsSuccess ? result.Value : defaultValue;
     }
 
-    public static T? GetValueOrDefault<T, S>(this Result<T, S> result, S expect, T? defaultValue = default)
-        where S : Enum
+    public static T? GetValueOrDefault<T, S>(this Result<T, S> result, T? defaultValue = default)
+        where S : struct, Enum
     {
-        return (result.Status?.Equals(expect) ?? false) ? defaultValue : result.Value;
+        return result.IsSuccess ? result.Value : defaultValue;
     }
 
     public static bool TryGetValue<T>(this Result<T> result, out T value)
@@ -214,10 +254,10 @@ public static class ResultExtensions
         return false;
     }
 
-    public static bool TryGetValue<T, S>(this Result<T, S> result, S expect, out T value)
-        where S : Enum
+    public static bool TryGetValue<T, S>(this Result<T, S> result, out T value)
+        where S : struct, Enum
     {
-        if (EqualityComparer<S>.Default.Equals(result.Status, expect))
+        if (result.IsSuccess)
         {
             value = result.Value;
             return true;

Ghost.Entities.Test/EntityTest.cs

@@ -1,16 +1,18 @@
 using Ghost.Test.Core;
 using Misaki.HighPerformance.Jobs;
-using Misaki.HighPerformance.LowLevel.Buffer;
 using Misaki.HighPerformance.Mathematics;
-using System.Runtime.CompilerServices;
 
 namespace Ghost.Entities.Test;
 
-internal struct TestEntityQueryJob : IJobEntity<Transform>
+internal struct TestEntityQueryJob : IJobChunk
 {
-    public readonly void Execute(Entity entity, ref Transform transform)
+    public void Execute(ChunkView view, int threadIndex)
     {
-        transform.position += new float3(10, 10, 10);
+        var transforms = view.GetComponentData<Transform>();
+        for (var i = 0; i < view.Count; i++)
+        {
+            transforms[i].position += new float3(10, 10, 10);
+        }
     }
 }
 
@@ -23,8 +25,6 @@ public partial class EntityTest : ITest
     {
         _jobScheduler = new JobScheduler(4);
         _world = World.Create(_jobScheduler);
-
-        Console.WriteLine(Unsafe.SizeOf<EntityQuery>());
     }
 
     public void Run()
@@ -39,7 +39,7 @@ public partial class EntityTest : ITest
         ref var query = ref _world.GetEntityQueryReference(queryID);
 
         var testJob = new TestEntityQueryJob();
-        var handle = query.ScheduleEntityParallel<TestEntityQueryJob, Transform>(testJob, Allocator.Temp, 64, JobHandle.Invalid);
+        var handle = query.ScheduleChunkParallel(testJob, 64, JobHandle.Invalid);
         _jobScheduler.WaitComplete(handle);
 
         query.ForEach<Transform>((e, ref t) =>

Ghost.Entities/Archetype.cs

@@ -263,12 +263,12 @@ internal unsafe struct Archetype : IIdentifierType, IDisposable
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public readonly ResultStatus SetComponentData(int chunkIndex, int rowIndex, Identifier<IComponent> componentID, void* pComponent)
+    public readonly ErrorStatus SetComponentData(int chunkIndex, int rowIndex, Identifier<IComponent> componentID, void* pComponent)
     {
         var r = GetLayout(componentID);
-        if (r.Status != ResultStatus.Success)
+        if (r.Error != ErrorStatus.None)
         {
-            return r.Status;
+            return r.Error;
         }
 
         var offset = r.Value.offset;
@@ -280,14 +280,14 @@ internal unsafe struct Archetype : IIdentifierType, IDisposable
 
         MemoryUtility.MemCpy(dst, pComponent, (nuint)size);
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public readonly void* GetComponentData(int chunkIndex, int rowIndex, Identifier<IComponent> componentID)
     {
         var r = GetLayout(componentID);
-        if (r.Status != ResultStatus.Success)
+        if (r.Error != ErrorStatus.None)
         {
             return null;
         }
@@ -307,27 +307,27 @@ internal unsafe struct Archetype : IIdentifierType, IDisposable
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public readonly Result<ComponentMemoryLayout, ResultStatus> GetLayout(int componentID)
+    public readonly Result<ComponentMemoryLayout, ErrorStatus> GetLayout(int componentID)
     {
         if (componentID >= _componentIDToLayoutIndex.Count)
         {
-            return Result.Create(default(ComponentMemoryLayout), ResultStatus.InvalidArgument);
+            return ErrorStatus.InvalidArgument;
         }
 
         var layoutIndex = _componentIDToLayoutIndex[componentID];
         if (layoutIndex == -1)
         {
-            return Result.Create(default(ComponentMemoryLayout), ResultStatus.NotFound);
+            return ErrorStatus.NotFound;
         }
 
-        return Result.Create(_layouts[layoutIndex], ResultStatus.Success);
+        return _layouts[layoutIndex];
     }
 
-    public ResultStatus RemoveEntity(int chunkIndex, int rowIndex)
+    public ErrorStatus RemoveEntity(int chunkIndex, int rowIndex)
     {
         if (chunkIndex < 0 || chunkIndex >= _chunks.Count)
         {
-            return ResultStatus.InvalidArgument;
+            return ErrorStatus.InvalidArgument;
         }
 
         ref var chunk = ref _chunks[chunkIndex];
@@ -341,13 +341,13 @@ internal unsafe struct Archetype : IIdentifierType, IDisposable
             var pRowEntity = chunkBase + _entityIdsOffset + (sizeof(Entity) * rowIndex);
 
             var wroldResult = World.GetWorld(_worldID);
-            if (wroldResult.Status != ResultStatus.Success)
+            if (wroldResult.Error != ErrorStatus.None)
             {
-                return wroldResult.Status;
+                return wroldResult.Error;
             }
 
             var result = wroldResult.Value.EntityManager.UpdateEntityLocation(*(Entity*)pLastEntity, _id, chunkIndex, rowIndex);
-            if (result != ResultStatus.Success)
+            if (result != ErrorStatus.None)
             {
                 return result;
             }
@@ -367,7 +367,7 @@ internal unsafe struct Archetype : IIdentifierType, IDisposable
         }
 
         chunk.Count--;
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]

Ghost.Entities/EntityCommandBuffer.cs

@@ -102,14 +102,16 @@ public unsafe class EntityCommandBuffer : IDisposable
         return bufferPtr;
     }
 
-    public void CreateEntity()
+    public void CreateEntity(int count = 1)
     {
         WriteHeader(ECBOpCode.CreateEntity);
+        Write(count);
     }
 
-    public void CreateEntity(params ReadOnlySpan<Identifier<IComponent>> componentTypeIDs)
+    public void CreateEntity(int count, params ReadOnlySpan<Identifier<IComponent>> componentTypeIDs)
     {
         WriteHeader(ECBOpCode.CreateEntityWithComponents);
+        Write(count);
         Write(componentTypeIDs.Length);
         WriteSpan(componentTypeIDs);
     }
@@ -150,23 +152,23 @@ public unsafe class EntityCommandBuffer : IDisposable
     {
         var cursor = 0;
         var length = _buffer.Count;
-        var ptr = (byte*)_buffer.GetUnsafePtr();
 
         while (cursor < length)
         {
-            var op = *(ECBOpCode*)ptr[cursor];
-            cursor += sizeof(ECBOpCode);
+            var op = Read<ECBOpCode>(ref cursor);
 
             switch (op)
             {
                 case ECBOpCode.CreateEntity:
-                    _entityManager.CreateEntity();
+                    var count = Read<int>(ref cursor);
+                    _entityManager.CreateEntities(count);
                     break;
 
                 case ECBOpCode.CreateEntityWithComponents:
+                    var entityCount = Read<int>(ref cursor);
                     var compCount = Read<int>(ref cursor);
                     var compTypeIDs = ReadSpan<Identifier<IComponent>>(ref cursor, compCount);
-                    _entityManager.CreateEntity(compTypeIDs);
+                    _entityManager.CreateEntities(entityCount, compTypeIDs);
                     break;
 
                 case ECBOpCode.DestroyEntity:

Ghost.Entities/EntityManager.cs

@@ -6,6 +6,14 @@ using System.Diagnostics;
 
 namespace Ghost.Entities;
 
+/// <summary>
+/// A manager for creating, destroying, and managing entities and their components.
+/// </summary>
+/// <remarks>
+/// All methods in this class are not thread-safe and all of them will cause structural changes if not mentioned otherwise.
+/// Use <see cref="EntityCommandBuffer"/> to defer structural changes to a safe point.
+/// Use <see cref="World.GetThreadLocalEntityCommandBuffer(int)"/> to get a thread-local command buffer for multithreaded scenarios.
+/// </remarks>
 public unsafe partial class EntityManager : IDisposable
 {
     private struct EntityLocation
@@ -30,19 +38,19 @@ public unsafe partial class EntityManager : IDisposable
         Dispose();
     }
 
-    internal ResultStatus UpdateEntityLocation(Entity entity, Identifier<Archetype> newArchetypeID, int newChunkIndex, int newRowIndex)
+    internal ErrorStatus UpdateEntityLocation(Entity entity, Identifier<Archetype> newArchetypeID, int newChunkIndex, int newRowIndex)
     {
         ref var location = ref _entityLocations.GetElementReferenceAt(entity.ID, entity.Generation, out var exist);
         if (!exist)
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         location.archetypeID = newArchetypeID;
         location.chunkIndex = newChunkIndex;
         location.rowIndex = newRowIndex;
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -51,21 +59,10 @@ public unsafe partial class EntityManager : IDisposable
     /// <returns>The created entity.</returns>
     public Entity CreateEntity()
     {
-        // Put into empty archetype
-        ref var emptyArchetype = ref _world.GetArchetypeReference(World.EmptyArchetypeID);
-        emptyArchetype.AllocateEntity(out var chunkIndex, out var rowIndex);
+        var entities = (Span<Entity>)stackalloc Entity[1];
+        CreateEntities(1, entities);
 
-        var id = _entityLocations.Add(new EntityLocation
-        {
-            archetypeID = World.EmptyArchetypeID,
-            chunkIndex = chunkIndex,
-            rowIndex = rowIndex
-        }, out var generation);
-
-        var entity = new Entity(id, generation);
-        emptyArchetype.SetEntity(chunkIndex, rowIndex, entity);
-
-        return entity;
+        return entities[0];
     }
 
     /// <summary>
@@ -75,28 +72,59 @@ public unsafe partial class EntityManager : IDisposable
     /// <returns>The created entity.</returns>
     public Entity CreateEntity(params ReadOnlySpan<Identifier<IComponent>> componentTypeIDs)
     {
-        var signatureHash = ComponentRegister.GetHashCode(componentTypeIDs);
-        var arcID = _world.GetArchetypeIDBySignatureHash(signatureHash);
+        var entities = (Span<Entity>)stackalloc Entity[1];
+        CreateEntities(1, entities, componentTypeIDs);
 
-        if (arcID.IsNotValid)
+        return entities[0];
+    }
+
+    /// <summary>
+    /// Create multiple entities with no components.
+    /// </summary>
+    /// <param name="count">The number of entities to create.</param>
+    /// <param name="entities">The span to store the created entities.</param>
+    public void CreateEntities(int count, Span<Entity> entities)
+    {
+        ref var emptyArchetype = ref _world.GetArchetypeReference(World.EmptyArchetypeID);
+        emptyArchetype.AllocateEntity(out var chunkIndex, out var rowIndex);
+
+        for (var i = 0; i < count; i++)
         {
-            arcID = _world.CreateArchetype(componentTypeIDs, signatureHash);
+            var id = _entityLocations.Add(new EntityLocation
+            {
+                archetypeID = World.EmptyArchetypeID,
+                chunkIndex = chunkIndex,
+                rowIndex = rowIndex
+            }, out var generation);
+
+            var entity = new Entity(id, generation);
+            emptyArchetype.SetEntity(chunkIndex, rowIndex, entity);
+
+            entities[i] = entity;
         }
+    }
 
-        ref var archetype = ref _world.GetArchetypeReference(arcID);
-        archetype.AllocateEntity(out var chunkIndex, out var rowIndex);
+    /// <summary>
+    /// Create multiple entities with no components.
+    /// </summary>
+    /// <param name="count">The number of entities to create.</param>
+    public void CreateEntities(int count)
+    {
+        ref var emptyArchetype = ref _world.GetArchetypeReference(World.EmptyArchetypeID);
+        emptyArchetype.AllocateEntity(out var chunkIndex, out var rowIndex);
 
-        var id = _entityLocations.Add(new EntityLocation
+        for (var i = 0; i < count; i++)
         {
-            archetypeID = arcID,
-            chunkIndex = chunkIndex,
-            rowIndex = rowIndex
-        }, out var generation);
+            var id = _entityLocations.Add(new EntityLocation
+            {
+                archetypeID = World.EmptyArchetypeID,
+                chunkIndex = chunkIndex,
+                rowIndex = rowIndex
+            }, out var generation);
 
-        var entity = new Entity(id, generation);
-        archetype.SetEntity(chunkIndex, rowIndex, entity);
-
-        return entity;
+            var entity = new Entity(id, generation);
+            emptyArchetype.SetEntity(chunkIndex, rowIndex, entity);
+        }
     }
 
     /// <summary>
@@ -106,7 +134,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="allocator">The allocator to use for the returned array.</param>
     /// <param name="componentTypeIDs">The component type IDs to add to the entities. </param>
     /// <returns>An array of the created entities.</returns>
-    public UnsafeArray<Entity> CreateEntities(int count, Allocator allocator, params ReadOnlySpan<Identifier<IComponent>> componentTypeIDs)
+    public void CreateEntities(int count, Span<Entity> entities, params ReadOnlySpan<Identifier<IComponent>> componentTypeIDs)
     {
         var signatureHash = ComponentRegister.GetHashCode(componentTypeIDs);
         var arcID = _world.GetArchetypeIDBySignatureHash(signatureHash);
@@ -118,7 +146,6 @@ public unsafe partial class EntityManager : IDisposable
 
         ref var archetype = ref _world.GetArchetypeReference(arcID);
 
-        var entities = new UnsafeArray<Entity>(count, allocator);
         for (var i = 0; i < count; i++)
         {
             archetype.AllocateEntity(out var chunkIndex, out var rowIndex);
@@ -135,8 +162,6 @@ public unsafe partial class EntityManager : IDisposable
 
             entities[i] = entity;
         }
-
-        return entities;
     }
 
     /// <summary>
@@ -176,26 +201,26 @@ public unsafe partial class EntityManager : IDisposable
     /// Destroy the specified entity.
     /// </summary>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus DestroyEntity(Entity entity)
+    public ErrorStatus DestroyEntity(Entity entity)
     {
         if (!_entityLocations.TryGetElementAt(entity.ID, entity.Generation, out var location))
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         ref var archetype = ref _world.GetArchetypeReference(location.archetypeID);
         var r = archetype.RemoveEntity(location.chunkIndex, location.rowIndex);
-        if (r != ResultStatus.Success)
+        if (r != ErrorStatus.None)
         {
             return r;
         }
 
         if (!_entityLocations.Remove(entity.ID, entity.Generation))
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -214,11 +239,11 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="componentID">The component type ID of the singleton.</param>
     /// <param name="pComponent">Pointer to the component data.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus CreateSingleton(Identifier<IComponent> componentID, void* pComponent)
+    public ErrorStatus CreateSingleton(Identifier<IComponent> componentID, void* pComponent)
     {
         if (pComponent == null)
         {
-            return ResultStatus.InvalidArgument;
+            return ErrorStatus.InvalidArgument;
         }
 
         // Check if singleton already exists
@@ -227,7 +252,7 @@ public unsafe partial class EntityManager : IDisposable
 
         if (arcID.IsValid)
         {
-            return ResultStatus.InvalidArgument;
+            return ErrorStatus.InvalidArgument;
         }
 
         arcID = _world.CreateArchetype([componentID], signatureHash);
@@ -246,7 +271,7 @@ public unsafe partial class EntityManager : IDisposable
         archetype.SetEntity(chunkIndex, rowIndex, entity);
         archetype.SetComponentData(chunkIndex, rowIndex, componentID, pComponent);
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -255,7 +280,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <typeparam name="T">The component type.</typeparam>
     /// <param name="component">The component data.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus CreateSingleton<T>(T component = default)
+    public ErrorStatus CreateSingleton<T>(T component = default)
         where T : unmanaged, IComponent
     {
         return CreateSingleton(ComponentTypeID<T>.value, &component);
@@ -278,7 +303,7 @@ public unsafe partial class EntityManager : IDisposable
 
         ref var archetype = ref _world.GetArchetypeReference(arcID);
         var layoutResult = archetype.GetLayout(componentID);
-        if (layoutResult.Status != ResultStatus.Success)
+        if (layoutResult.Error != ErrorStatus.None)
         {
             return null;
         }
@@ -311,8 +336,8 @@ public unsafe partial class EntityManager : IDisposable
 
             var src = oldArch._chunks[oldChunk].GetUnsafePtr() + layout.offset + (layout.size * oldRow);
             var r = newArch.GetLayout(layout.componentID);
-            Debug.Assert(r.Status == ResultStatus.Success); // This should always be true if the system is consistent.
-            if (r.Status != ResultStatus.Success)
+            Debug.Assert(r.Error == ErrorStatus.None); // This should always be true if the system is consistent.
+            if (r.Error != ErrorStatus.None)
             {
                 continue;
             }
@@ -330,13 +355,13 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="componentID">The component type ID to add.</param>
     /// <param name="pComponent">Pointer to the component data.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus AddComponent(Entity entity, Identifier<IComponent> componentID, void* pComponent)
+    public ErrorStatus AddComponent(Entity entity, Identifier<IComponent> componentID, void* pComponent)
     {
         // Find current location
         ref var location = ref _entityLocations.GetElementReferenceAt(entity.ID, entity.Generation, out var exist);
         if (!exist)
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         // Build new archetype signature
@@ -397,8 +422,8 @@ public unsafe partial class EntityManager : IDisposable
         newArchetype.SetComponentData(newChunkIndex, newRowIndex, componentID, pComponent);
 
         var r = oldArchetype.RemoveEntity(location.chunkIndex, location.rowIndex);
-        Debug.Assert(r == ResultStatus.Success); // We assert it because the entity should exist if the whole system is consistent.
-        if (r != ResultStatus.Success)
+        Debug.Assert(r == ErrorStatus.None); // We assert it because the entity should exist if the whole system is consistent.
+        if (r != ErrorStatus.None)
         {
             return r;
         }
@@ -408,7 +433,7 @@ public unsafe partial class EntityManager : IDisposable
         location.chunkIndex = newChunkIndex;
         location.rowIndex = newRowIndex;
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -418,7 +443,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="entity">The entity to add the component to.</param>
     /// <param name="component">The component data.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus AddComponent<T>(Entity entity, T component = default)
+    public ErrorStatus AddComponent<T>(Entity entity, T component = default)
         where T : unmanaged, IComponent
     {
         return AddComponent(entity, ComponentTypeID<T>.value, &component);
@@ -430,13 +455,13 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="entity">The entity to remove the component from.</param>
     /// <param name="componentID">The component type ID to remove.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus RemoveComponent(Entity entity, Identifier<IComponent> componentID)
+    public ErrorStatus RemoveComponent(Entity entity, Identifier<IComponent> componentID)
     {
         // Find current location
         ref var location = ref _entityLocations.GetElementReferenceAt(entity.ID, entity.Generation, out var exist);
         if (!exist)
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         // Build new archetype signature
@@ -492,8 +517,8 @@ public unsafe partial class EntityManager : IDisposable
         newArchetype.SetEntity(newChunkIndex, newRowIndex, entity);
 
         var r = oldArchetype.RemoveEntity(location.chunkIndex, location.rowIndex);
-        Debug.Assert(r == ResultStatus.Success); // We assert it because the entity should exist if the whole system is consistent.
-        if (r != ResultStatus.Success)
+        Debug.Assert(r == ErrorStatus.None); // We assert it because the entity should exist if the whole system is consistent.
+        if (r != ErrorStatus.None)
         {
             return r;
         }
@@ -503,7 +528,7 @@ public unsafe partial class EntityManager : IDisposable
         location.chunkIndex = newChunkIndex;
         location.rowIndex = newRowIndex;
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -512,7 +537,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <typeparam name="T">The component type.</typeparam>
     /// <param name="entity">The entity to remove the component from.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus RemoveComponent<T>(Entity entity)
+    public ErrorStatus RemoveComponent<T>(Entity entity)
         where T : unmanaged, IComponent
     {
         return RemoveComponent(entity, ComponentTypeID<T>.value);
@@ -525,17 +550,17 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="componentID">The component type ID to set.</param>
     /// <param name="pComponent">Pointer to the component data.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus SetComponent(Entity entity, Identifier<IComponent> componentID, void* pComponent)
+    public ErrorStatus SetComponent(Entity entity, Identifier<IComponent> componentID, void* pComponent)
     {
         if (!_entityLocations.TryGetElementAt(entity.ID, entity.Generation, out var location))
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         ref var archetype = ref _world.GetArchetypeReference(location.archetypeID);
         archetype.SetComponentData(location.chunkIndex, location.rowIndex, componentID, pComponent);
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -544,7 +569,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <typeparam name="T">The component type.</typeparam>
     /// <param name="entity">The entity to set the component data for.</param>
     /// <param name="component">The component data.</param>
-    public ResultStatus SetComponent<T>(Entity entity, T component)
+    public ErrorStatus SetComponent<T>(Entity entity, T component)
         where T : unmanaged, IComponent
     {
         return SetComponent(entity, ComponentTypeID<T>.value, &component);
@@ -616,11 +641,11 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="componentID">The component type ID of the enableable component.</
     /// <param name="enabled">True to enable the component, false to disable it.</param>
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus SetEnabled(Entity entity, Identifier<IComponent> componentID, bool enabled)
+    public ErrorStatus SetEnabled(Entity entity, Identifier<IComponent> componentID, bool enabled)
     {
         if (!_entityLocations.TryGetElementAt(entity.ID, entity.Generation, out var location))
         {
-            return ResultStatus.NotFound;
+            return ErrorStatus.NotFound;
         }
 
         ref var archetype = ref _world.GetArchetypeReference(location.archetypeID);
@@ -628,9 +653,9 @@ public unsafe partial class EntityManager : IDisposable
         var rowIndex = location.rowIndex;
 
         var layoutResult = archetype.GetLayout(componentID);
-        if (layoutResult.Status != ResultStatus.Success)
+        if (layoutResult.Error != ErrorStatus.None)
         {
-            return layoutResult.Status;
+            return layoutResult.Error;
         }
 
         ref var chunk = ref archetype.GetChunkReference(chunkIndex);
@@ -649,7 +674,7 @@ public unsafe partial class EntityManager : IDisposable
             maskBase[byteIndex] &= (byte)~(1 << bitIndex);
         }
 
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     /// <summary>
@@ -659,7 +684,7 @@ public unsafe partial class EntityManager : IDisposable
     /// <param name="entity">The entity to set the enabled state for.</param>
     /// <param name="enabled">True to enable the component, false to disable it.</
     /// <returns>The result status of the operation.</returns>
-    public ResultStatus SetEnabled<T>(Entity entity, bool enabled)
+    public ErrorStatus SetEnabled<T>(Entity entity, bool enabled)
         where T : unmanaged, IEnableableComponent
     {
         return SetEnabled(entity, ComponentTypeID<T>.value, enabled);

Ghost.Entities/EntityQuery.JobChunk.cs

@@ -0,0 +1,87 @@
+using Ghost.Core;
+using Misaki.HighPerformance.Jobs;
+using Misaki.HighPerformance.LowLevel.Collections;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Entities;
+
+public interface IJobChunk
+{
+    void Execute(ChunkView view, int threadIndex);
+}
+
+internal unsafe struct ChunkInfo
+{
+    public Chunk* pChunk;
+    public Archetype* pArchetype;
+}
+
+internal unsafe struct JobChunkBatch<TJob> : IJobParallelFor
+    where TJob : unmanaged, IJobChunk
+{
+
+    public TJob userJob;
+    public ReadOnlyUnsafeCollection<ChunkInfo> chunkInfos;
+
+    public void Execute(int loopIndex, int threadIndex)
+    {
+        var info = chunkInfos[loopIndex];
+        var view = new ChunkView(in *info.pArchetype, in *info.pChunk);
+
+        userJob.Execute(view, threadIndex);
+    }
+}
+
+internal struct DisposeJobChunk : IJob
+{
+    public UnsafeList<ChunkInfo> list;
+
+    public void Execute(int threadIndex)
+    {
+        list.Dispose();
+    }
+}
+
+public unsafe partial struct EntityQuery
+{
+    public JobHandle ScheduleChunkParallel<TJob>(TJob job, int batchSize, JobHandle dependency)
+        where TJob : unmanaged, IJobChunk
+    {
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
+
+        var chunkInfos = new UnsafeList<ChunkInfo>(_matchingArchetypes.Count * 2, JobScheduler.TempAllocatorHandle);
+
+        foreach (var archID in _matchingArchetypes)
+        {
+            ref var arch = ref world.GetArchetypeReference(archID);
+
+            for (int i = 0; i < arch.ChunkCount; i++)
+            {
+                var pChunk = (Chunk*)arch._chunks.GetUnsafePtr() + i;
+
+                chunkInfos.Add(new ChunkInfo
+                {
+                    pArchetype = (Archetype*)Unsafe.AsPointer(ref arch),
+                    pChunk = pChunk
+                });
+            }
+        }
+
+        var batchJob = new JobChunkBatch<TJob>
+        {
+            userJob = job,
+            chunkInfos = chunkInfos.AsReadOnly()
+        };
+
+        var handle = world.JobScheduler.ScheduleParallel(ref batchJob, chunkInfos.Count, batchSize, dependency);
+
+        var disposeJob = new DisposeJobChunk
+        {
+            list = chunkInfos
+        };
+
+        world.JobScheduler.Schedule(ref disposeJob, handle);
+
+        return handle;
+    }
+}

Ghost.Entities/Query.cs

@@ -74,91 +74,102 @@ public struct EntityQueryMask : IDisposable, IEquatable<EntityQueryMask>
     }
 }
 
-public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
+/// <summary>
+/// Provides a read-only view over a chunk of entities and their component data within an archetype.
+/// </summary>
+/// <remarks>This does not filter disabled/enabled components. You must handle that manually.</remarks>
+public readonly unsafe ref struct ChunkView
 {
-    /// <summary>
-    /// Provides a read-only view over a chunk of entities and their component data within an archetype.
-    /// </summary>
-    /// <remarks>This does not filter disabled/enabled components. You must handle that manually.</remarks>
-    public readonly ref struct ChunkView
+    private readonly ReadOnlyUnsafeCollection<Archetype.ComponentMemoryLayout> _layouts;
+    private readonly byte* _pChunkData;
+    private readonly int _entityOffset;
+    private readonly int _entityCount;
+
+    public readonly int Count => _entityCount;
+
+    internal ChunkView(ReadOnlyUnsafeCollection<Archetype.ComponentMemoryLayout> layouts, byte* pChunkData, int entityOffset, int entityCount)
     {
-        private readonly ref Archetype _archetype;
-        private readonly ref Chunk _chunk;
-
-        public readonly int Count => _chunk.Count;
-
-        internal ChunkView(ref Archetype archetype, int chunkIndex)
-        {
-            _archetype = ref archetype;
-            _chunk = ref archetype.GetChunkReference(chunkIndex);
-        }
-
-        /// <summary>
-        /// Returns a read-only span containing structuralAll entities stored in the current chunk.
-        /// </summary>
-        /// <returns>A read-only span of <see cref="Entity"/> values representing the entities in the chunk.</returns>
-        public readonly ReadOnlySpan<Entity> GetEntities()
-        {
-            var ptr = _chunk.GetUnsafePtr();
-            var pEntity = (Entity*)(ptr + _archetype.EntityIDsOffset);
-            return new ReadOnlySpan<Entity>(pEntity, _chunk.Count);
-        }
-
-        /// <summary>
-        /// Gets a span providing direct access to the component data of type T0 for structuralAll entities in the chunk.
-        /// </summary>
-        /// <typeparam name="T">The type of component to access. Must be an unmanaged type that implements <see cref="Component"/>.</typeparam>
-        /// <returns>A span of type <see cref="{T}"/> containing the component data for each entity in the chunk.</returns>
-        /// <exception cref="InvalidOperationException">Thrown if the specified component type is not present in the archetype.</exception>
-        public readonly Span<T> GetComponentData<T>()
-            where T : unmanaged, IComponent
-        {
-            var layout = _archetype.GetLayout(ComponentTypeID<T>.value).GetValueOrThrow(ResultStatus.Success);
-            var ptr = _chunk.GetUnsafePtr() + layout.offset;
-            return new Span<T>(ptr, _chunk.Count);
-        }
-
-        /// <summary>
-        /// Gets a bit set representing the enabled state of each instance of the specified enableable component
-        /// type within the current chunk.
-        /// </summary>
-        /// <typeparam name="T">The component type for which to retrieve enablement bits. Must be unmanaged and implement <see cref="IEnableableComponent"/>.</typeparam>
-        /// <returns>A <see cref="SpanBitSet"/> that provides access to the enablement bits for all instances of the specified component type in the chunk.</returns>
-        /// <exception cref="InvalidOperationException">Thrown if the specified component type does not support enablement.</exception>
-        public SpanBitSet GetEnableBits<T>()
-            where T : unmanaged, IEnableableComponent
-        {
-            var layout = _archetype.GetLayout(ComponentTypeID<T>.value).GetValueOrThrow(ResultStatus.Success);
-            if (layout.enableBitsOffset == -1)
-            {
-                throw new InvalidOperationException($"Component {typeof(T).FullName} is not enableable.");
-            }
-
-            var maskBase = _chunk.GetUnsafePtr() + layout.enableBitsOffset;
-            return new SpanBitSet(new Span<uint>(maskBase, (_chunk.Count + 31) / 32));
-        }
-
-        /// <summary>
-        /// Determines whether the specified component of type <typeparamref name="T"/> at the given index is currently enabled.
-        /// </summary>
-        /// <typeparam name="T">The type of the component to check. Must be an unmanaged type that implements <see cref="IEnableableComponent"/>.</typeparam>
-        /// <param name="index">The zero-based index of the component instance to check within the chunk.</param>
-        /// <returns>true if the component at the specified index is enabled; otherwise, false.</returns>
-        /// <exception cref="InvalidOperationException">Thrown if the specified component type <typeparamref name="T"/> does not support enable/disable functionality.</exception>
-        public readonly bool IsComponentEnabled<T>(int index)
-            where T : unmanaged, IEnableableComponent
-        {
-            var layout = _archetype.GetLayout(ComponentTypeID<T>.value).GetValueOrThrow(ResultStatus.Success);
-            if (layout.enableBitsOffset == -1)
-            {
-                throw new InvalidOperationException($"Component {typeof(T).FullName} is not enableable.");
-            }
-
-            var maskBase = _chunk.GetUnsafePtr() + layout.enableBitsOffset;
-            return CheckBit(maskBase, index);
-        }
+        _layouts = layouts;
+        _pChunkData = pChunkData;
+        _entityOffset = entityOffset;
+        _entityCount = entityCount;
     }
 
+    internal ChunkView(ref readonly Archetype archetype, ref readonly Chunk chunk)
+    {
+        _layouts = archetype._layouts.AsReadOnly();
+        _pChunkData = chunk.GetUnsafePtr();
+        _entityOffset = archetype.EntityIDsOffset;
+        _entityCount = chunk.Count;
+    }
+
+    /// <summary>
+    /// Returns a read-only span containing structuralAll entities stored in the current chunk.
+    /// </summary>
+    /// <returns>A read-only span of <see cref="Entity"/> values representing the entities in the chunk.</returns>
+    public readonly ReadOnlySpan<Entity> GetEntities()
+    {
+        var pEntity = (Entity*)(_pChunkData + _entityOffset);
+        return new ReadOnlySpan<Entity>(pEntity, _entityCount);
+    }
+
+    /// <summary>
+    /// Gets a span providing direct access to the component data of type T0 for structuralAll entities in the chunk.
+    /// </summary>
+    /// <typeparam name="T">The type of component to access. Must be an unmanaged type that implements <see cref="Component"/>.</typeparam>
+    /// <returns>A span of type <see cref="{T}"/> containing the component data for each entity in the chunk.</returns>
+    /// <exception cref="InvalidOperationException">Thrown if the specified component type is not present in the archetype.</exception>
+    public readonly Span<T> GetComponentData<T>()
+        where T : unmanaged, IComponent
+    {
+        var layout = _layouts[ComponentTypeID<T>.value];
+        var pComponentData = _pChunkData + layout.offset;
+        return new Span<T>(pComponentData, _entityCount);
+    }
+
+    /// <summary>
+    /// Gets a bit set representing the enabled state of each instance of the specified enableable component
+    /// type within the current chunk.
+    /// </summary>
+    /// <typeparam name="T">The component type for which to retrieve enablement bits. Must be unmanaged and implement <see cref="IEnableableComponent"/>.</typeparam>
+    /// <returns>A <see cref="SpanBitSet"/> that provides access to the enablement bits for all instances of the specified component type in the chunk.</returns>
+    /// <exception cref="InvalidOperationException">Thrown if the specified component type does not support enablement.</exception>
+    public readonly SpanBitSet GetEnableBits<T>()
+        where T : unmanaged, IEnableableComponent
+    {
+        var layout = _layouts[ComponentTypeID<T>.value];
+        if (layout.enableBitsOffset == -1)
+        {
+            throw new InvalidOperationException($"Component {typeof(T).FullName} is not enableable.");
+        }
+
+        var maskBase = _pChunkData + layout.enableBitsOffset;
+        return new SpanBitSet(new Span<uint>(maskBase, (_entityCount + 31) / 32));
+    }
+
+    /// <summary>
+    /// Determines whether the specified component of type <typeparamref name="T"/> at the given index is currently enabled.
+    /// </summary>
+    /// <typeparam name="T">The type of the component to check. Must be an unmanaged type that implements <see cref="IEnableableComponent"/>.</typeparam>
+    /// <param name="index">The zero-based index of the component instance to check within the chunk.</param>
+    /// <returns>true if the component at the specified index is enabled; otherwise, false.</returns>
+    /// <exception cref="InvalidOperationException">Thrown if the specified component type <typeparamref name="T"/> does not support enable/disable functionality.</exception>
+    public readonly bool IsComponentEnabled<T>(int index)
+        where T : unmanaged, IEnableableComponent
+    {
+        var layout = _layouts[ComponentTypeID<T>.value];
+        if (layout.enableBitsOffset == -1)
+        {
+            throw new InvalidOperationException($"Component {typeof(T).FullName} is not enableable.");
+        }
+
+        var pMask = _pChunkData + layout.enableBitsOffset;
+        return EntityQuery.CheckBit(pMask, index);
+    }
+}
+
+public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
+{
     /// <summary>
     /// Provides an enumerator for iterating over chunks of entities and their component data that match a set of archetypes within a world.
     /// </summary>
@@ -182,7 +193,8 @@ public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
                 get
                 {
                     ref var archetype = ref _iterator._world.GetArchetypeReference(_iterator._matchingArchetypes[_archetypeIndex]);
-                    return new ChunkView(ref archetype, _chunkIndex);
+                    ref var chunk = ref archetype.GetChunkReference(_chunkIndex);
+                    return new ChunkView(in archetype, in chunk);
                 }
             }
 
@@ -250,7 +262,7 @@ public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
         {
             // Get the EnableBitmask for this component in this chunk
             var layoutResult = archetype.GetLayout(id);
-            if (layoutResult.Status != ResultStatus.Success
+            if (layoutResult.Error != ErrorStatus.None
                 // Not enableable, always true
                 || layoutResult.Value.enableBitsOffset == -1)
             {
@@ -269,7 +281,7 @@ public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
         while (it.Next(out var id))
         {
             var layoutResult = archetype.GetLayout(id);
-            if (layoutResult.Status != ResultStatus.Success)
+            if (layoutResult.Error != ErrorStatus.None)
             {
                 continue;
             }
@@ -290,7 +302,7 @@ public unsafe partial struct EntityQuery : IIdentifierType, IDisposable
         while (it.Next(out var id))
         {
             var layoutResult = archetype.GetLayout(id);
-            if (layoutResult.Status != ResultStatus.Success)
+            if (layoutResult.Error != ErrorStatus.None)
             {
                 continue;
             }

Ghost.Entities/Templates/EntityQuery.ComponentIterator.gen.cs

@@ -54,7 +54,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 1; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -124,7 +124,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -147,10 +146,9 @@ public unsafe partial struct EntityQuery
     public readonly ComponentIterator<T0> GetComponentIterator<T0>()
         where T0 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -223,7 +221,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 2; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -293,7 +291,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -317,10 +314,9 @@ public unsafe partial struct EntityQuery
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -402,7 +398,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 3; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -472,7 +468,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -497,10 +492,9 @@ public unsafe partial struct EntityQuery
         where T1 : unmanaged, IComponent
         where T2 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2, T3>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -591,7 +585,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 4; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -661,7 +655,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -687,10 +680,9 @@ public unsafe partial struct EntityQuery
         where T2 : unmanaged, IComponent
         where T3 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2, T3>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2, T3>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2, T3, T4>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -790,7 +782,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 5; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -860,7 +852,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -887,10 +878,9 @@ public unsafe partial struct EntityQuery
         where T3 : unmanaged, IComponent
         where T4 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2, T3, T4>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2, T3, T4>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2, T3, T4, T5>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -999,7 +989,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 6; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1069,7 +1059,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -1097,10 +1086,9 @@ public unsafe partial struct EntityQuery
         where T4 : unmanaged, IComponent
         where T5 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2, T3, T4, T5>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2, T3, T4, T5>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2, T3, T4, T5, T6>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -1218,7 +1206,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 7; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1288,7 +1276,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -1317,10 +1304,9 @@ public unsafe partial struct EntityQuery
         where T5 : unmanaged, IComponent
         where T6 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2, T3, T4, T5, T6>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2, T3, T4, T5, T6>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
     public readonly ref struct ComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
@@ -1447,7 +1433,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 8; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1517,7 +1503,6 @@ public unsafe partial struct EntityQuery
                     }
                 }
             }
-
         }
 
         private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
@@ -1547,8 +1532,7 @@ public unsafe partial struct EntityQuery
         where T6 : unmanaged, IComponent
         where T7 : unmanaged, IComponent
     {
-        return new ComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
-
 }

Ghost.Entities/Templates/EntityQuery.ComponentIterator.tt

@@ -99,7 +99,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < <#= i #>; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -191,7 +191,7 @@ public unsafe partial struct EntityQuery
     public readonly ComponentIterator<<#= generics#>> GetComponentIterator<<#= generics#>>()
 <#= restrictions #>
     {
-        return new ComponentIterator<<#= generics#>>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new ComponentIterator<<#= generics#>>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
 <# } #>

Ghost.Entities/Templates/EntityQuery.EntityComponentIterator.gen.cs

@@ -77,7 +77,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 1; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -169,7 +169,7 @@ public unsafe partial struct EntityQuery
     public readonly EntityComponentIterator<T0> GetEntityComponentIterator<T0>()
         where T0 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1>
@@ -251,7 +251,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 2; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -344,7 +344,7 @@ public unsafe partial struct EntityQuery
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2>
@@ -435,7 +435,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 3; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -529,7 +529,7 @@ public unsafe partial struct EntityQuery
         where T1 : unmanaged, IComponent
         where T2 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2, T3>
@@ -629,7 +629,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 4; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -724,7 +724,7 @@ public unsafe partial struct EntityQuery
         where T2 : unmanaged, IComponent
         where T3 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2, T3>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2, T3>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2, T3, T4>
@@ -833,7 +833,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 5; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -929,7 +929,7 @@ public unsafe partial struct EntityQuery
         where T3 : unmanaged, IComponent
         where T4 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2, T3, T4>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2, T3, T4>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2, T3, T4, T5>
@@ -1047,7 +1047,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 6; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1144,7 +1144,7 @@ public unsafe partial struct EntityQuery
         where T4 : unmanaged, IComponent
         where T5 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6>
@@ -1271,7 +1271,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 7; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1369,7 +1369,7 @@ public unsafe partial struct EntityQuery
         where T5 : unmanaged, IComponent
         where T6 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
     public readonly ref struct EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>
@@ -1505,7 +1505,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < 8; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -1604,7 +1604,7 @@ public unsafe partial struct EntityQuery
         where T6 : unmanaged, IComponent
         where T7 : unmanaged, IComponent
     {
-        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<T0, T1, T2, T3, T4, T5, T6, T7>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
 }

Ghost.Entities/Templates/EntityQuery.EntityComponentIterator.tt

@@ -100,7 +100,7 @@ public unsafe partial struct EntityQuery
                 for (var index = 0; index < <#= i #>; index++)
                 {
                     var layout = _currentArchetype.GetLayout(_compTypeIDs[index])
-                        .GetValueOrThrow(ResultStatus.Success);
+                        .GetValueOrThrow();
                     _offsets[index] = layout.offset;
                     _compBasePtrs[index] = (long)(_chunkBasePtr + _offsets[index]);
                 }
@@ -192,7 +192,7 @@ public unsafe partial struct EntityQuery
     public readonly EntityComponentIterator<<#= generics#>> GetEntityComponentIterator<<#= generics#>>()
 <#= restrictions #>
     {
-        return new EntityComponentIterator<<#= generics#>>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success));
+        return new EntityComponentIterator<<#= generics#>>(_matchingArchetypes.AsReadOnly(), _mask, World.GetWorld(_worldID).GetValueOrThrow());
     }
 
 <# } #>

Ghost.Entities/Templates/EntityQuery.ForEach.gen.cs

@@ -1,4 +1,3 @@
-
 using Ghost.Core;
 
 namespace Ghost.Entities;
@@ -8,7 +7,7 @@ public unsafe partial struct EntityQuery
     public readonly void ForEach<T0>(ForEach<T0> action)
         where T0 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value };
         var offsets = stackalloc int[1];
@@ -21,7 +20,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 1; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -64,7 +63,7 @@ public unsafe partial struct EntityQuery
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value };
         var offsets = stackalloc int[2];
@@ -77,7 +76,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 2; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -122,7 +121,7 @@ public unsafe partial struct EntityQuery
         where T1 : unmanaged, IComponent
         where T2 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value };
         var offsets = stackalloc int[3];
@@ -135,7 +134,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 3; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -182,7 +181,7 @@ public unsafe partial struct EntityQuery
         where T2 : unmanaged, IComponent
         where T3 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value };
         var offsets = stackalloc int[4];
@@ -195,7 +194,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 4; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -244,7 +243,7 @@ public unsafe partial struct EntityQuery
         where T3 : unmanaged, IComponent
         where T4 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value };
         var offsets = stackalloc int[5];
@@ -257,7 +256,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 5; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -308,7 +307,7 @@ public unsafe partial struct EntityQuery
         where T4 : unmanaged, IComponent
         where T5 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value };
         var offsets = stackalloc int[6];
@@ -321,7 +320,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 6; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -374,7 +373,7 @@ public unsafe partial struct EntityQuery
         where T5 : unmanaged, IComponent
         where T6 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value, ComponentTypeID<T6>.value };
         var offsets = stackalloc int[7];
@@ -387,7 +386,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 7; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -442,7 +441,7 @@ public unsafe partial struct EntityQuery
         where T6 : unmanaged, IComponent
         where T7 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value, ComponentTypeID<T6>.value, ComponentTypeID<T7>.value };
         var offsets = stackalloc int[8];
@@ -455,7 +454,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 8; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -504,7 +503,7 @@ public unsafe partial struct EntityQuery
     public readonly void ForEach<T0>(ForEachWithEntity<T0> action)
         where T0 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value };
         var offsets = stackalloc int[1];
@@ -517,7 +516,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 1; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -561,7 +560,7 @@ public unsafe partial struct EntityQuery
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value };
         var offsets = stackalloc int[2];
@@ -574,7 +573,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 2; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -620,7 +619,7 @@ public unsafe partial struct EntityQuery
         where T1 : unmanaged, IComponent
         where T2 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value };
         var offsets = stackalloc int[3];
@@ -633,7 +632,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 3; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -681,7 +680,7 @@ public unsafe partial struct EntityQuery
         where T2 : unmanaged, IComponent
         where T3 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value };
         var offsets = stackalloc int[4];
@@ -694,7 +693,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 4; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -744,7 +743,7 @@ public unsafe partial struct EntityQuery
         where T3 : unmanaged, IComponent
         where T4 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value };
         var offsets = stackalloc int[5];
@@ -757,7 +756,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 5; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -809,7 +808,7 @@ public unsafe partial struct EntityQuery
         where T4 : unmanaged, IComponent
         where T5 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value };
         var offsets = stackalloc int[6];
@@ -822,7 +821,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 6; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -876,7 +875,7 @@ public unsafe partial struct EntityQuery
         where T5 : unmanaged, IComponent
         where T6 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value, ComponentTypeID<T6>.value };
         var offsets = stackalloc int[7];
@@ -889,7 +888,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 7; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -945,7 +944,7 @@ public unsafe partial struct EntityQuery
         where T6 : unmanaged, IComponent
         where T7 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { ComponentTypeID<T0>.value, ComponentTypeID<T1>.value, ComponentTypeID<T2>.value, ComponentTypeID<T3>.value, ComponentTypeID<T4>.value, ComponentTypeID<T5>.value, ComponentTypeID<T6>.value, ComponentTypeID<T7>.value };
         var offsets = stackalloc int[8];
@@ -958,7 +957,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < 8; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;

Ghost.Entities/Templates/EntityQuery.ForEach.tt

@@ -16,8 +16,7 @@ public unsafe partial struct EntityQuery
 #>
 <# for (var i = 1; i <= Amount; i++)
 {
-    var generics = AppendGenerics(i);
-    var compGenerics = AppendGenericRefParameters(i);
+    var generics = AppendParameters(i, "T{0}");
     var restrictions = AppendGenericRestrictionsMultiline(i, "unmanaged, IComponent", 2);
 
     var delegateTupe = isForEachWithEntity ? "ForEachWithEntity" : "ForEach";
@@ -25,7 +24,7 @@ public unsafe partial struct EntityQuery
     public readonly void ForEach<<#= generics #>>(<#= delegateTupe #><<#= generics #>> action)
 <#= restrictions #>
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         var compTypeIDs = stackalloc int[] { <#= AppendGenerics(i, "ComponentTypeID<T{0}>.value") #> };
         var offsets = stackalloc int[<#= i #>];
@@ -38,7 +37,7 @@ public unsafe partial struct EntityQuery
             for (var index = 0; index < <#= i #>; index++)
             {
                 var layoutResult = archetype.GetLayout(compTypeIDs[index]);
-                if (layoutResult.Status != ResultStatus.Success)
+                if (!layoutResult)
                 {
                     hasAllComponents = false;
                     break;
@@ -75,9 +74,9 @@ public unsafe partial struct EntityQuery
 
 <# if (isForEachWithEntity) { #>
                     var pEntity = (Entity*)(pChunkData + archetype.EntityIDsOffset + (sizeof(Entity) * entityIndex));
-                    action(*pEntity, <#= AppendRefParameters(i, "*pComp{0}") #>);
+                    action(*pEntity, <#= AppendParameters(i, "ref *pComp{0}") #>);
 <# } else { #>
-                    action(<#= AppendRefParameters(i, "*pComp{0}") #>);
+                    action(<#= AppendParameters(i, "ref *pComp{0}") #>);
 <# } #>
                 }
             }

Ghost.Entities/Templates/EntityQuery.JobEntity.gen.cs

@@ -8,7 +8,7 @@ namespace Ghost.Entities;
 public interface IJobEntity<T0>
     where T0 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0);
+    void Execute(Entity entity, ref T0 component0, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0> : IJobParallelFor
@@ -43,7 +43,7 @@ internal unsafe struct JobEntityBatch<TJob, T0> : IJobParallelFor
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], threadIndex);
         }
     }
 }
@@ -52,7 +52,7 @@ public interface IJobEntity<T0, T1>
     where T0 : unmanaged, IComponent
     where T1 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1> : IJobParallelFor
@@ -100,7 +100,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1> : IJobParallelFor
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], threadIndex);
         }
     }
 }
@@ -110,7 +110,7 @@ public interface IJobEntity<T0, T1, T2>
     where T1 : unmanaged, IComponent
     where T2 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2> : IJobParallelFor
@@ -171,7 +171,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2> : IJobParallelFor
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], threadIndex);
         }
     }
 }
@@ -182,7 +182,7 @@ public interface IJobEntity<T0, T1, T2, T3>
     where T2 : unmanaged, IComponent
     where T3 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3> : IJobParallelFor
@@ -256,7 +256,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3> : IJobParallelFor
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], threadIndex);
         }
     }
 }
@@ -268,7 +268,7 @@ public interface IJobEntity<T0, T1, T2, T3, T4>
     where T3 : unmanaged, IComponent
     where T4 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4> : IJobParallelFor
@@ -355,7 +355,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4> : IJobParallelFo
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], threadIndex);
         }
     }
 }
@@ -368,7 +368,7 @@ public interface IJobEntity<T0, T1, T2, T3, T4, T5>
     where T4 : unmanaged, IComponent
     where T5 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5> : IJobParallelFor
@@ -468,7 +468,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5> : IJobParall
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i], threadIndex);
         }
     }
 }
@@ -482,7 +482,7 @@ public interface IJobEntity<T0, T1, T2, T3, T4, T5, T6>
     where T5 : unmanaged, IComponent
     where T6 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5, T6> : IJobParallelFor
@@ -595,7 +595,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5, T6> : IJobPa
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i], ref ptr6[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i], ref ptr6[i], threadIndex);
         }
     }
 }
@@ -610,7 +610,7 @@ public interface IJobEntity<T0, T1, T2, T3, T4, T5, T6, T7>
     where T6 : unmanaged, IComponent
     where T7 : unmanaged, IComponent
 {
-    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6, ref T7 component7);
+    void Execute(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6, ref T7 component7, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5, T6, T7> : IJobParallelFor
@@ -736,7 +736,7 @@ internal unsafe struct JobEntityBatch<TJob, T0, T1, T2, T3, T4, T5, T6, T7> : IJ
                 continue;
             }
 
-            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i], ref ptr6[i], ref ptr7[i]);
+            userJob.Execute(pEntity[i], ref ptr0[i], ref ptr1[i], ref ptr2[i], ref ptr3[i], ref ptr4[i], ref ptr5[i], ref ptr6[i], ref ptr7[i], threadIndex);
         }
     }
 }
@@ -768,7 +768,7 @@ public unsafe partial struct EntityQuery
         where TJob : unmanaged, IJobEntity<T0>
         where T0 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -790,7 +790,7 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -871,7 +871,7 @@ public unsafe partial struct EntityQuery
         where T0 : unmanaged, IComponent
         where T1 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -896,9 +896,9 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -995,7 +995,7 @@ public unsafe partial struct EntityQuery
         where T1 : unmanaged, IComponent
         where T2 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1023,11 +1023,11 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -1140,7 +1140,7 @@ public unsafe partial struct EntityQuery
         where T2 : unmanaged, IComponent
         where T3 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1171,13 +1171,13 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout3 = arch.GetLayout(ComponentTypeID<T3>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -1306,7 +1306,7 @@ public unsafe partial struct EntityQuery
         where T3 : unmanaged, IComponent
         where T4 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1340,15 +1340,15 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout3 = arch.GetLayout(ComponentTypeID<T3>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout4 = arch.GetLayout(ComponentTypeID<T4>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -1493,7 +1493,7 @@ public unsafe partial struct EntityQuery
         where T4 : unmanaged, IComponent
         where T5 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1530,17 +1530,17 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout3 = arch.GetLayout(ComponentTypeID<T3>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout4 = arch.GetLayout(ComponentTypeID<T4>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout5 = arch.GetLayout(ComponentTypeID<T5>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -1701,7 +1701,7 @@ public unsafe partial struct EntityQuery
         where T5 : unmanaged, IComponent
         where T6 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1741,19 +1741,19 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout3 = arch.GetLayout(ComponentTypeID<T3>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout4 = arch.GetLayout(ComponentTypeID<T4>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout5 = arch.GetLayout(ComponentTypeID<T5>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout6 = arch.GetLayout(ComponentTypeID<T6>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)
@@ -1930,7 +1930,7 @@ public unsafe partial struct EntityQuery
         where T6 : unmanaged, IComponent
         where T7 : unmanaged, IComponent
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -1973,21 +1973,21 @@ public unsafe partial struct EntityQuery
 
             // Get offsets ONCE per archetype
             var layout0 = arch.GetLayout(ComponentTypeID<T0>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout1 = arch.GetLayout(ComponentTypeID<T1>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout2 = arch.GetLayout(ComponentTypeID<T2>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout3 = arch.GetLayout(ComponentTypeID<T3>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout4 = arch.GetLayout(ComponentTypeID<T4>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout5 = arch.GetLayout(ComponentTypeID<T5>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout6 = arch.GetLayout(ComponentTypeID<T6>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
             var layout7 = arch.GetLayout(ComponentTypeID<T7>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 
             // Add all chunks from this archetype
             for (var i = 0; i < arch.ChunkCount; i++)

Ghost.Entities/Templates/EntityQuery.JobEntity.tt

@@ -19,7 +19,7 @@ namespace Ghost.Entities;
 public interface IJobEntity<<#= generics #>>
 <#= restrictions #>
 {
-    void Execute(Entity entity, <#= AppendParameters(i, "ref T{0} component{0}") #>);
+    void Execute(Entity entity, <#= AppendParameters(i, "ref T{0} component{0}") #>, int threadIndex);
 }
 
 internal unsafe struct JobEntityBatch<TJob, <#= generics #>> : IJobParallelFor
@@ -62,7 +62,7 @@ internal unsafe struct JobEntityBatch<TJob, <#= generics #>> : IJobParallelFor
             }
 
 <# } #>
-            userJob.Execute(pEntity[i], <#= AppendParameters(i, "ref ptr{0}[i]") #>);
+            userJob.Execute(pEntity[i], <#= AppendParameters(i, "ref ptr{0}[i]") #>, threadIndex);
         }
     }
 }
@@ -104,7 +104,7 @@ public unsafe partial struct EntityQuery
         where TJob : unmanaged, IJobEntity<<#= generics #>>
 <#= restrictions #>
     {
-        var world = World.GetWorld(_worldID).GetValueOrThrow(ResultStatus.Success);
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
 
         // 1. Flatten the World
         var chunkList = new UnsafeList<IntPtr>(128, allocator);
@@ -129,7 +129,7 @@ public unsafe partial struct EntityQuery
             // Get offsets ONCE per archetype
 <# for (var j = 0; j < i; j++){ #>
             var layout<#= j #> = arch.GetLayout(ComponentTypeID<T<#= j #>>.value)
-                .GetValueOrThrow(ResultStatus.Success);
+                .GetValueOrThrow();
 <# } #>
 
             // Add all chunks from this archetype

Ghost.Entities/Templates/ForEach.gen.cs

@@ -1,92 +1,35 @@
-
 namespace Ghost.Entities;
 
 public delegate void ForEach<T0>(ref T0 component0)
     where T0 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1>(ref T0 component0, ref T1 component1)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2>(ref T0 component0, ref T1 component1, ref T2 component2)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2, T3>(ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2, T3, T4>(ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2, T3, T4, T5>(ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2, T3, T4, T5, T6>(ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent
-    where T6 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent where T6 : unmanaged, IComponent;
 public delegate void ForEach<T0, T1, T2, T3, T4, T5, T6, T7>(ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6, ref T7 component7)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent
-    where T6 : unmanaged, IComponent
-    where T7 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent where T6 : unmanaged, IComponent where T7 : unmanaged, IComponent;
 
 public delegate void ForEachWithEntity<T0>(Entity entity, ref T0 component0)
     where T0 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1>(Entity entity, ref T0 component0, ref T1 component1)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2, T3>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2, T3, T4>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2, T3, T4, T5>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2, T3, T4, T5, T6>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent
-    where T6 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent where T6 : unmanaged, IComponent;
 public delegate void ForEachWithEntity<T0, T1, T2, T3, T4, T5, T6, T7>(Entity entity, ref T0 component0, ref T1 component1, ref T2 component2, ref T3 component3, ref T4 component4, ref T5 component5, ref T6 component6, ref T7 component7)
-    where T0 : unmanaged, IComponent
-    where T1 : unmanaged, IComponent
-    where T2 : unmanaged, IComponent
-    where T3 : unmanaged, IComponent
-    where T4 : unmanaged, IComponent
-    where T5 : unmanaged, IComponent
-    where T6 : unmanaged, IComponent
-    where T7 : unmanaged, IComponent;
+    where T0 : unmanaged, IComponent where T1 : unmanaged, IComponent where T2 : unmanaged, IComponent where T3 : unmanaged, IComponent where T4 : unmanaged, IComponent where T5 : unmanaged, IComponent where T6 : unmanaged, IComponent where T7 : unmanaged, IComponent;

Ghost.Entities/Templates/ForEach.tt

@@ -10,18 +10,18 @@ namespace Ghost.Entities;
 {
     var generics = AppendParameters(i, "T{0}");
     var compGenerics = AppendParameters(i, "ref T{0} component{0}");
-    var restrictions = AppendGenericRestrictionsMultiline(i, "unmanaged, IComponent", 1);
+    var restrictions = AppendGenericRestrictions(i, "unmanaged, IComponent");
 #>
 public delegate void ForEach<<#= generics #>>(<#= compGenerics #>)
-<#= restrictions #>;
+    <#= restrictions #>;
 <# } #>
 
 <# for (var i = 1; i <= Amount; i++)
 {
     var generics = AppendParameters(i, "T{0}");
     var compGenerics = AppendParameters(i, "ref T{0} component{0}");
-    var restrictions = AppendGenericRestrictionsMultiline(i, "unmanaged, IComponent", 1);
+    var restrictions = AppendGenericRestrictions(i, "unmanaged, IComponent");
 #>
 public delegate void ForEachWithEntity<<#= generics #>>(Entity entity, <#= compGenerics #>)
-<#= restrictions #>;
+    <#= restrictions #>;
 <# } #>

Ghost.Entities/World.cs

@@ -48,20 +48,20 @@ public partial class World
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static Result<World, ResultStatus> GetWorld(Identifier<World> id)
+    public static Result<World, ErrorStatus> GetWorld(Identifier<World> id)
     {
         if (id.value < 0 || id.value >= s_worlds.Count)
         {
-            return Result.Create(default(World)!, ResultStatus.NotFound);
+            return ErrorStatus.InvalidArgument;
         }
 
         var world = s_worlds[id.value];
         if (world is null)
         {
-            return Result.Create(default(World)!, ResultStatus.NotFound);
+            return ErrorStatus.NotFound;
         }
 
-        return Result.Create(world, ResultStatus.Success);
+        return world;
     }
 }
 
@@ -102,6 +102,9 @@ public partial class World : IIdentifierType, IDisposable, IEquatable<World>
     /// <summary>
     /// Gets the main entity command buffer for this world.
     /// </summary>
+    /// <remarks>
+    /// Use <see cref="GetThreadLocalEntityCommandBuffer(int)"/> to get thread-local command buffers for multi-threaded jobs.
+    /// </remarks>
     public EntityCommandBuffer EntityCommandBuffer => _entityCommandBuffer;
 
     private World(Identifier<World> id, int entityCapacity, JobScheduler jobScheduler)

Ghost.Graphics/Core/Material.cs

@@ -1,5 +1,6 @@
 using Ghost.Core;
 using Ghost.Graphics.RHI;
+using Misaki.HighPerformance.LowLevel;
 using Misaki.HighPerformance.LowLevel.Buffer;
 using Misaki.HighPerformance.LowLevel.Collections;
 using System.Runtime.CompilerServices;
@@ -83,15 +84,15 @@ public struct Material : IResourceReleasable, IHandleType
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public readonly unsafe Result<T, ResultStatus> GetPropertyCache<T>()
+    public readonly unsafe Result<T, ErrorStatus> GetPropertyCache<T>()
         where T : unmanaged
     {
         if (sizeof(T) != _cBufferCache.Size)
         {
-            return Result.Create(default(T), ResultStatus.InvalidArgument);
+            return ErrorStatus.InvalidArgument;
         }
 
-        return Result.Create(*(T*)_cBufferCache.CpuData.GetUnsafePtr(), ResultStatus.Success);
+        return *(T*)_cBufferCache.CpuData.GetUnsafePtr();
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -106,28 +107,28 @@ public struct Material : IResourceReleasable, IHandleType
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public readonly unsafe ResultStatus SetPropertyCache<T>(ref readonly T data)
+    public readonly unsafe ErrorStatus SetPropertyCache<T>(ref readonly T data)
         where T : unmanaged
     {
         if (sizeof(T) != _cBufferCache.Size)
         {
-            return ResultStatus.InvalidArgument;
+            return ErrorStatus.InvalidArgument;
         }
 
         Unsafe.WriteUnaligned(_cBufferCache.CpuData.GetUnsafePtr(), data);
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public readonly unsafe ResultStatus SetRawPropertyCache(ReadOnlySpan<byte> data)
+    public readonly unsafe ErrorStatus SetRawPropertyCache(ReadOnlySpan<byte> data)
     {
         if (data.Length != _cBufferCache.Size)
         {
-            return ResultStatus.InvalidArgument;
+            return ErrorStatus.InvalidArgument;
         }
 
         Unsafe.WriteUnaligned(_cBufferCache.CpuData.GetUnsafePtr(), data);
-        return ResultStatus.Success;
+        return ErrorStatus.None;
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]

Ghost.Graphics/Core/RenderingContext.cs

@@ -49,7 +49,7 @@ public readonly unsafe ref struct RenderingContext
             CommandBufferType.Graphics => _engine.Device.GraphicsQueue,
             CommandBufferType.Compute => _engine.Device.ComputeQueue,
             CommandBufferType.Copy => _engine.Device.CopyQueue,
-            _ => throw new ArgumentOutOfRangeException(),
+            _ => throw new InvalidOperationException("Unknown command buffer type."),
         };
 
         queue.Submit(commandBuffer);
@@ -123,8 +123,8 @@ public readonly unsafe ref struct RenderingContext
             localToWorld = localToWorld,
             worldBoundsMin = meshData.BoundingBox.Min,
             worldBoundsMax = meshData.BoundingBox.Max,
-            vertexBuffer = _engine.ResourceDatabase.GetBindlessIndex(meshData.VertexBuffer.AsResource()).GetValueOrThrow(ResultStatus.Success),
-            indexBuffer = _engine.ResourceDatabase.GetBindlessIndex(meshData.IndexBuffer.AsResource()).GetValueOrThrow(ResultStatus.Success),
+            vertexBuffer = _engine.ResourceDatabase.GetBindlessIndex(meshData.VertexBuffer.AsResource()).GetValueOrThrow(),
+            indexBuffer = _engine.ResourceDatabase.GetBindlessIndex(meshData.IndexBuffer.AsResource()).GetValueOrThrow(),
         };
 
         var bufferHandle = meshData.ObjectDataBuffer.AsResource();
@@ -147,7 +147,7 @@ public readonly unsafe ref struct RenderingContext
         where T : unmanaged
     {
         var desc = ResourceDatabase.GetResourceDescription(texture.AsResource())
-            .GetValueOrThrow(ResultStatus.Success);
+            .GetValueOrThrow();
 
         if (data.Length * sizeof(T) != desc.TextureDescription.GetTotalBytes())
         {
@@ -180,7 +180,7 @@ public readonly unsafe ref struct RenderingContext
         var shader = ResourceDatabase.GetShaderReference(materialRef.Shader);
 
         var keyResult = shader.TryGetPassKey(passName, out var passIndex);
-        if (keyResult.Status != ResultStatus.Success)
+        if (keyResult.Error != ErrorStatus.None)
         {
             throw new Exception(keyResult.ToString());
         }

Ghost.Graphics/Core/Shader.cs

@@ -101,17 +101,17 @@ public class Shader : IResourceReleasable, IIdentifierType
         return ref _passes[index];
     }
 
-    public RefResult<ShaderPass, ResultStatus> TryGetPassKey(string passName, out int passIndex)
+    public RefResult<ShaderPass, ErrorStatus> TryGetPassKey(string passName, out int passIndex)
     {
         var index = _passLookup.GetValueOrDefault(passName, -1);
         if (index == -1)
         {
             passIndex = -1;
-            return Result.CreateRef(ref Unsafe.NullRef<ShaderPass>(), ResultStatus.NotFound);
+            return ErrorStatus.NotFound;
         }
 
         passIndex = index;
-        return Result.CreateRef(ref _passes[index], ResultStatus.Success);
+        return RefResult<ShaderPass, ErrorStatus>.Success(ref _passes[index]);
     }
 
     void IResourceReleasable.ReleaseResource(IResourceDatabase database)

Ghost.Graphics/D3D12/D3D12CommandBuffer.cs

@@ -130,7 +130,7 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
 #if DEBUG
     [DoesNotReturn]
 #endif
-    private void RecordError(string cmdName, ResultStatus status)
+    private void RecordError(string cmdName, ErrorStatus status)
     {
 #if DEBUG
         throw new InvalidOperationException($"Error at {cmdName} with {status}");
@@ -183,7 +183,7 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         _commandList.Get()->Close();
         _isRecording = false;
 
-        if (_lastError.Status != ResultStatus.Success)
+        if (_lastError.Status != ErrorStatus.None)
         {
             return Result.Failure($"Command buffer ended with errors at {_lastError.CommandIndex}, command '{_lastError.CommandName}': {_lastError.Status}");
         }
@@ -220,21 +220,21 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
 
             if (!desc.Resource.IsValid)
             {
-                RecordError(nameof(ResourceBarrier), ResultStatus.InvalidArgument);
+                RecordError(nameof(ResourceBarrier), ErrorStatus.InvalidArgument);
                 continue;
             }
 
             var recordResult = _resourceDatabase.GetResourceRecord(desc.Resource);
-            if (recordResult.Status != ResultStatus.Success)
+            if (recordResult.Error != ErrorStatus.None)
             {
-                RecordError(nameof(ResourceBarrier), recordResult.Status);
+                RecordError(nameof(ResourceBarrier), recordResult.Error);
                 continue;
             }
 
             ref var record = ref recordResult.Value;
             if (record.state != desc.StateBefore)
             {
-                RecordError(nameof(ResourceBarrier), ResultStatus.InvalidState);
+                RecordError(nameof(ResourceBarrier), ErrorStatus.InvalidState);
                 continue;
             }
 
@@ -263,9 +263,9 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         }
 
         var recordResult = _resourceDatabase.GetResourceRecord(resource);
-        if (recordResult.Status != ResultStatus.Success)
+        if (recordResult.Error != ErrorStatus.None)
         {
-            RecordError(nameof(ResourceBarrier), recordResult.Status);
+            RecordError(nameof(ResourceBarrier), recordResult.Error);
             return;
         }
 
@@ -284,9 +284,9 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         IncrementCommandCount();
 
         var recordResult = _resourceDatabase.GetResourceRecord(resource);
-        if (recordResult.Status != ResultStatus.Success)
+        if (recordResult.Error != ErrorStatus.None)
         {
-            RecordError(nameof(ResourceBarrier), recordResult.Status);
+            RecordError(nameof(ResourceBarrier), recordResult.Error);
             return;
         }
 
@@ -316,14 +316,14 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
             var handle = renderTargets[i];
             if (!handle.IsValid)
             {
-                RecordError(nameof(SetRenderTargets), ResultStatus.InvalidArgument);
+                RecordError(nameof(SetRenderTargets), ErrorStatus.InvalidArgument);
                 continue;
             }
 
             var recordResult = _resourceDatabase.GetResourceRecord(handle.AsResource());
-            if (recordResult.Status != ResultStatus.Success)
+            if (recordResult.Error != ErrorStatus.None)
             {
-                RecordError(nameof(SetRenderTargets), recordResult.Status);
+                RecordError(nameof(SetRenderTargets), recordResult.Error);
                 continue;
             }
 
@@ -337,9 +337,9 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         if (pDsvHandle != null)
         {
             var recordResult = _resourceDatabase.GetResourceRecord(depthTarget.AsResource());
-            if (recordResult.Status != ResultStatus.Success)
+            if (recordResult.Error != ErrorStatus.None)
             {
-                RecordError(nameof(SetRenderTargets), recordResult.Status);
+                RecordError(nameof(SetRenderTargets), recordResult.Error);
                 return;
             }
 
@@ -362,14 +362,14 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
             var rtDesc = rtDescs[i];
             if (!rtDesc.Texture.IsValid)
             {
-                RecordError(nameof(BeginRenderPass), ResultStatus.InvalidArgument);
+                RecordError(nameof(BeginRenderPass), ErrorStatus.InvalidArgument);
                 continue;
             }
 
             var recordResult = _resourceDatabase.GetResourceRecord(rtDesc.Texture.AsResource());
-            if (recordResult.Status != ResultStatus.Success)
+            if (recordResult.Error != ErrorStatus.None)
             {
-                RecordError(nameof(BeginRenderPass), recordResult.Status);
+                RecordError(nameof(BeginRenderPass), recordResult.Error);
                 continue;
             }
 
@@ -402,9 +402,9 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         if (pDsvDesc != null)
         {
             var recordResult = _resourceDatabase.GetResourceRecord(depthDesc.Texture.AsResource());
-            if (recordResult.Status != ResultStatus.Success)
+            if (recordResult.Error != ErrorStatus.None)
             {
-                RecordError(nameof(BeginRenderPass), recordResult.Status);
+                RecordError(nameof(BeginRenderPass), recordResult.Error);
                 return;
             }
 
@@ -458,10 +458,10 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         IncrementCommandCount();
 
         var psor = _pipelineLibrary.GetGraphicsPSO(pipelineKey);
-        if (psor.Status != ResultStatus.Success)
+        if (psor.Error != ErrorStatus.None)
         {
 #if DEBUG || GHOST_EDITOR
-            Logger.LogError($"Failed to get graphics pipeline state object for key {pipelineKey}: {psor.Status}");
+            Logger.LogError($"Failed to get graphics pipeline state object for key {pipelineKey}: {psor.Error}");
 #endif
             return;
         }
@@ -487,9 +487,9 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         IncrementCommandCount();
 
         var recordResult = _resourceDatabase.GetResourceRecord(buffer.AsResource());
-        if (recordResult.Status != ResultStatus.Success)
+        if (recordResult.Error != ErrorStatus.None)
         {
-            RecordError(nameof(BeginRenderPass), recordResult.Status);
+            RecordError(nameof(BeginRenderPass), recordResult.Error);
             return;
         }
 
@@ -657,7 +657,7 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         var pSrcResource = _resourceDatabase.GetResource(src.AsResource());
         if (pSrcResource == null || pDestResource == null)
         {
-            RecordError(nameof(CopyBuffer), ResultStatus.InvalidArgument);
+            RecordError(nameof(CopyBuffer), ErrorStatus.InvalidArgument);
             return;
         }
 

Ghost.Graphics/D3D12/D3D12PipelineLibrary.cs

@@ -161,7 +161,7 @@ internal unsafe class D3D12PipelineLibrary : IPipelineLibrary
 
         if (File.Exists(filePath))
         {
-            var fileBytes = File.ReadAllBytes(filePath!);
+            var fileBytes = File.ReadAllBytes(filePath);
             fixed (byte* pFileBytes = fileBytes)
             {
                 ThrowIfFailed(_device.NativeDevice.Get()->CreatePipelineLibrary(pFileBytes, (nuint)fileBytes.Length, __uuidof(pLibrary), (void**)&pLibrary));
@@ -224,7 +224,7 @@ internal unsafe class D3D12PipelineLibrary : IPipelineLibrary
                     RegisterSlot = info.BindPoint,
                     RegisterSpace = info.Space,
                     SizeInBytes = info.Size,
-                    Properties = info.Properties ?? Array.Empty<CBufferPropertyInfo>(),
+                    Properties = info.Properties ?? [],
                 };
             }
         }
@@ -401,14 +401,14 @@ internal unsafe class D3D12PipelineLibrary : IPipelineLibrary
         return key;
     }
 
-    public Result<SharedPtr<ID3D12PipelineState>, ResultStatus> GetGraphicsPSO(GraphicsPipelineKey key)
+    public Result<SharedPtr<ID3D12PipelineState>, ErrorStatus> GetGraphicsPSO(GraphicsPipelineKey key)
     {
         if (_pipelineCache.TryGetValue(key, out var cacheEntry))
         {
-            return Result.Create(new SharedPtr<ID3D12PipelineState>(cacheEntry.pso.Get()), ResultStatus.Success);
+            return cacheEntry.pso.Share();
         }
 
-        return Result.Create(default(SharedPtr<ID3D12PipelineState>), ResultStatus.NotFound);
+        return ErrorStatus.NotFound;
     }
 
     public void Dispose()

Ghost.Graphics/D3D12/D3D12ResourceDatabase.cs

@@ -178,17 +178,17 @@ internal class D3D12ResourceDatabase : IResourceDatabase
         return _resources.Contains(handle.id, handle.generation);
     }
 
-    public RefResult<ResourceRecord, ResultStatus> GetResourceRecord(Handle<GPUResource> handle)
+    public RefResult<ResourceRecord, ErrorStatus> GetResourceRecord(Handle<GPUResource> handle)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
 
         ref var info = ref _resources.GetElementReferenceAt(handle.id, handle.generation, out var exist);
         if (!exist)
         {
-            return Result.CreateRef(ref Unsafe.NullRef<ResourceRecord>(), ResultStatus.NotFound);
+            return ErrorStatus.NotFound;
         }
 
-        return Result.CreateRef(ref info, ResultStatus.Success);
+        return RefResult<ResourceRecord, ErrorStatus>.Success(ref info);
     }
 
     public ref ResourceRecord GetResourceRecord(Handle<GPUResource> handle, out bool exist)
@@ -202,7 +202,7 @@ internal class D3D12ResourceDatabase : IResourceDatabase
         ObjectDisposedException.ThrowIf(_disposed, this);
 
         var r = GetResourceRecord(handle);
-        if (r.Status != ResultStatus.Success)
+        if (r.Error != ErrorStatus.None)
         {
             return null;
         }
@@ -210,17 +210,17 @@ internal class D3D12ResourceDatabase : IResourceDatabase
         return r.Value.ResourcePtr;
     }
 
-    public Result<ResourceState, ResultStatus> GetResourceState(Handle<GPUResource> handle)
+    public Result<ResourceState, ErrorStatus> GetResourceState(Handle<GPUResource> handle)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
 
         var r = GetResourceRecord(handle);
-        if (r.Status != ResultStatus.Success)
+        if (!r)
         {
-            return Result.Create(ResourceState.Common, r.Status);
+            return r.Error;
         }
 
-        return Result.Create(r.Value.state, ResultStatus.Success);
+        return r.Value.state;
     }
 
     public void SetResourceState(Handle<GPUResource> handle, ResourceState state)
@@ -236,31 +236,30 @@ internal class D3D12ResourceDatabase : IResourceDatabase
         info.state = state;
     }
 
-    public Result<ResourceDesc, ResultStatus> GetResourceDescription(Handle<GPUResource> handle)
+    public Result<ResourceDesc, ErrorStatus> GetResourceDescription(Handle<GPUResource> handle)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
 
         var r = GetResourceRecord(handle);
-
-        if (r.Status != ResultStatus.Success)
+        if (!r)
         {
-            return Result.Create(default(ResourceDesc), r.Status);
+            return r.Error;
         }
 
-        return Result.Create(r.Value.desc, ResultStatus.Success);
+        return r.Value.desc;
     }
 
-    public Result<uint, ResultStatus> GetBindlessIndex(Handle<GPUResource> handle)
+    public Result<uint, ErrorStatus> GetBindlessIndex(Handle<GPUResource> handle)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
 
         ref var info = ref GetResourceRecord(handle, out var exist);
         if (!exist || !info.Allocated)
         {
-            return Result.Create(0u, ResultStatus.NotFound);
+            return ErrorStatus.NotFound;
         }
 
-        return Result.Create((uint)info.viewGroup.srv.value, ResultStatus.Success);
+        return (uint)info.viewGroup.srv.value;
     }
 
     public string? GetResourceName(Handle<GPUResource> handle)

Ghost.Graphics/RHI/Common.cs

@@ -98,7 +98,7 @@ internal struct GraphicsPipelineHash
     // Do we need to store blend state?
     // TODO: Variants
 
-    public GraphicsPipelineKey GetKey()
+    public readonly GraphicsPipelineKey GetKey()
     {
         Span<ulong> data = stackalloc ulong[3 + D3D12_SIMULTANEOUS_RENDER_TARGET_COUNT];
         data[0] = Id.value;
@@ -731,7 +731,7 @@ public struct CommandError
         get; set;
     }
 
-    public ResultStatus Status
+    public ErrorStatus Status
     {
         get; set;
     }

Ghost.Graphics/RHI/IResourceDatabase.cs

@@ -39,7 +39,7 @@ public interface IResourceDatabase : IDisposable
     /// </summary>
     /// <param name="handle">The handle that uniquely identifies the resource whose state is to be retrieved.</param>
     /// <returns>A ResourceState Value representing the current state of the resource associated with the specified handle.</returns>
-    Result<ResourceState, ResultStatus> GetResourceState(Handle<GPUResource> handle);
+    Result<ResourceState, ErrorStatus> GetResourceState(Handle<GPUResource> handle);
 
     /// <summary>
     /// Sets the state of the specified resource handle to the given Value.
@@ -53,14 +53,14 @@ public interface IResourceDatabase : IDisposable
     /// </summary>
     /// <param name="handle">A handle that identifies the GPU resource for which to obtain the description. Must reference a valid resource.</param>
     /// <returns>A ResourceDesc structure containing details about the specified GPU resource.</returns>
-    Result<ResourceDesc, ResultStatus> GetResourceDescription(Handle<GPUResource> handle);
+    Result<ResourceDesc, ErrorStatus> GetResourceDescription(Handle<GPUResource> handle);
 
     /// <summary>
     /// Retrieves the bindless index associated with the specified GPU resource handle.
     /// </summary>
     /// <param name="handle">A handle to the GPU resource for which to obtain the bindless index. Must reference a valid, currently registered resource.</param>
     /// <returns>The bindless index corresponding to the specified GPU resource handle. -1 if the resource does not support bindless access or is not found.</returns>
-    Result<uint, ResultStatus> GetBindlessIndex(Handle<GPUResource> handle);
+    Result<uint, ErrorStatus> GetBindlessIndex(Handle<GPUResource> handle);
 
     /// <summary>
     /// Retrieves the name of the GPU resource associated with the specified handle.

Ghost.Graphics/RenderPasses/MeshRenderPass.cs

@@ -27,9 +27,9 @@ internal class MeshRenderPass : IRenderPass
         public uint texture4;
         public uint tex_sampler;
 
-        private uint _padding1;
-        private uint _padding2;
-        private uint _padding3;
+        private readonly uint _padding1;
+        private readonly uint _padding2;
+        private readonly uint _padding3;
     }
 
     private Handle<Mesh> _mesh;
@@ -121,14 +121,14 @@ internal class MeshRenderPass : IRenderPass
         var matProps = new ShaderProperties_MyShader_Standard
         {
             color = new float4(1.0f, 1.0f, 1.0f, 1.0f),
-            texture1 = ctx.ResourceDatabase.GetBindlessIndex(_textures[0].AsResource()).GetValueOrThrow(ResultStatus.Success),
-            texture2 = ctx.ResourceDatabase.GetBindlessIndex(_textures[1].AsResource()).GetValueOrThrow(ResultStatus.Success),
-            texture3 = ctx.ResourceDatabase.GetBindlessIndex(_textures[2].AsResource()).GetValueOrThrow(ResultStatus.Success),
-            texture4 = ctx.ResourceDatabase.GetBindlessIndex(_textures[3].AsResource()).GetValueOrThrow(ResultStatus.Success),
+            texture1 = ctx.ResourceDatabase.GetBindlessIndex(_textures[0].AsResource()).GetValueOrThrow(),
+            texture2 = ctx.ResourceDatabase.GetBindlessIndex(_textures[1].AsResource()).GetValueOrThrow(),
+            texture3 = ctx.ResourceDatabase.GetBindlessIndex(_textures[2].AsResource()).GetValueOrThrow(),
+            texture4 = ctx.ResourceDatabase.GetBindlessIndex(_textures[3].AsResource()).GetValueOrThrow(),
             tex_sampler = (uint)sampler.value,
         };
 
-        Debug.Assert(matRef.SetPropertyCache(in matProps) == ResultStatus.Success);
+        Debug.Assert(matRef.SetPropertyCache(in matProps) == ErrorStatus.None);
         matRef.UploadData(ctx.DirectCommandBuffer);
     }
 

GhostEngine.slnx

@@ -23,8 +23,7 @@
     <Project Path="Ghost.ArcEntities/Ghost.ArcEntities.csproj" />
     <Project Path="Ghost.Core/Ghost.Core.csproj" />
     <Project Path="Ghost.Engine/Ghost.Engine.csproj" />
-    <Project Path="Ghost.SparseEntities/Ghost.SparseEntities.csproj" />
-    <Project Path="Ghost.Entities/Ghost.Entities.csproj" Id="8d127b7f-dc6a-4814-8dc0-1aefe65b5d08" />
+    <Project Path="Ghost.Entities/Ghost.Entities.csproj" />
     <Project Path="Ghost.Graphics/Ghost.Graphics.csproj" />
   </Folder>
   <Folder Name="/Test/">