Improvements to CS Console

* Errors are now logged properly.
* Can now define classes, methods, etc - no longer has to be an expression body.
* Added `StartCoroutine(IEnumerator routine)` helper method to easily run a Coroutine
* Disabling suggestions now properly stops Explorer trying to update suggestion cache instead of just not showing them. In the rare cases that suggestions cause a crash, disabling them will now prevent those crashes.
* Various other misc improvements behind the scenes

src/Core/CSharp/DummyBehaviour.cs

@@ -0,0 +1,29 @@
+#if MONO
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEngine;
+
+namespace UnityExplorer.Core.CSharp
+{
+    public class DummyBehaviour : MonoBehaviour
+    {
+        public static DummyBehaviour Instance;
+
+        public static void Setup()
+        {
+            var obj = new GameObject("Explorer_DummyBehaviour");
+            DontDestroyOnLoad(obj);
+            obj.hideFlags |= HideFlags.HideAndDontSave;
+
+            obj.AddComponent<DummyBehaviour>();
+        }
+
+        internal void Awake()
+        {
+            Instance = this;
+        }
+    }
+}
+#endif

src/Core/CSharp/ScriptEvaluator.cs

@@ -15,11 +15,12 @@ namespace UnityExplorer.Core.CSharp
             "mscorlib", "System.Core", "System", "System.Xml"
         };
 
-        private readonly TextWriter tw;
+        internal static TextWriter _textWriter;
+        internal static StreamReportPrinter _reportPrinter;
 
         public ScriptEvaluator(TextWriter tw) : base(BuildContext(tw))
         {
-            this.tw = tw;
+            _textWriter = tw;
 
             ImportAppdomainAssemblies(ReferenceAssembly);
             AppDomain.CurrentDomain.AssemblyLoad += OnAssemblyLoad;
@@ -28,23 +29,22 @@ namespace UnityExplorer.Core.CSharp
         public void Dispose()
         {
             AppDomain.CurrentDomain.AssemblyLoad -= OnAssemblyLoad;
-            tw.Dispose();
+            _textWriter.Dispose();
         }
 
         private void OnAssemblyLoad(object sender, AssemblyLoadEventArgs args)
         {
             string name = args.LoadedAssembly.GetName().Name;
+
             if (StdLib.Contains(name))
-            {
                 return;
-            }
 
             ReferenceAssembly(args.LoadedAssembly);
         }
 
         private static CompilerContext BuildContext(TextWriter tw)
         {
-            var reporter = new StreamReportPrinter(tw);
+            _reportPrinter = new StreamReportPrinter(tw);
 
             var settings = new CompilerSettings
             {
@@ -56,7 +56,7 @@ namespace UnityExplorer.Core.CSharp
                 EnhancedWarnings = false
             };
 
-            return new CompilerContext(settings, reporter);
+            return new CompilerContext(settings, _reportPrinter);
         }
 
         private static void ImportAppdomainAssemblies(Action<Assembly> import)

src/Core/CSharp/ScriptInteraction.cs

@@ -4,6 +4,11 @@ using UnityExplorer.UI;
 using UnityExplorer.UI.Main;
 using UnityExplorer.Core.Inspectors;
 using UnityExplorer.UI.Main.CSConsole;
+using System.Collections;
+using UnityEngine;
+using System.Collections.Generic;
+using System.Linq;
+using UnityExplorer.Core.Runtime;
 
 namespace UnityExplorer.Core.CSharp
 {
@@ -14,6 +19,11 @@ namespace UnityExplorer.Core.CSharp
             ExplorerCore.Log(message);
         }
 
+        public static void StartCoroutine(IEnumerator ienumerator)
+        {
+            RuntimeProvider.Instance.StartConsoleCoroutine(ienumerator);
+        }
+
         public static void AddUsing(string directive)
         {
             CSharpConsole.Instance.AddUsing(directive);
@@ -21,7 +31,7 @@ namespace UnityExplorer.Core.CSharp
 
         public static void GetUsing()
         {
-            ExplorerCore.Log(CSharpConsole.Instance.m_evaluator.GetUsing());
+            ExplorerCore.Log(CSharpConsole.Instance.Evaluator.GetUsing());
         }
 
         public static void Reset()

src/Core/Runtime/Il2Cpp/Il2CppCoroutine.cs

@@ -0,0 +1,156 @@
+#if CPP
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using UnhollowerBaseLib;
+using UnityEngine;
+
+// CREDIT HerpDerpenstine
+// https://github.com/LavaGang/MelonLoader/blob/master/MelonLoader.Support.Il2Cpp/MelonCoroutines.cs
+
+namespace UnityExplorer.Core.Runtime.Il2Cpp
+{
+    public static class Il2CppCoroutine
+    {
+        private struct CoroTuple
+        {
+            public object WaitCondition;
+            public IEnumerator Coroutine;
+        }
+        private static readonly List<CoroTuple> ourCoroutinesStore = new List<CoroTuple>();
+        private static readonly List<IEnumerator> ourNextFrameCoroutines = new List<IEnumerator>();
+        private static readonly List<IEnumerator> ourWaitForFixedUpdateCoroutines = new List<IEnumerator>();
+        private static readonly List<IEnumerator> ourWaitForEndOfFrameCoroutines = new List<IEnumerator>();
+
+        private static readonly List<IEnumerator> tempList = new List<IEnumerator>();
+
+        internal static object Start(IEnumerator routine)
+        {
+            if (routine != null) ProcessNextOfCoroutine(routine);
+            return routine;
+        }
+
+        internal static void Stop(IEnumerator enumerator)
+        {
+            if (ourNextFrameCoroutines.Contains(enumerator)) // the coroutine is running itself
+                ourNextFrameCoroutines.Remove(enumerator);
+            else
+            {
+                int coroTupleIndex = ourCoroutinesStore.FindIndex(c => c.Coroutine == enumerator);
+                if (coroTupleIndex != -1) // the coroutine is waiting for a subroutine
+                {
+                    object waitCondition = ourCoroutinesStore[coroTupleIndex].WaitCondition;
+                    if (waitCondition is IEnumerator waitEnumerator)
+                        Stop(waitEnumerator);
+
+                    ourCoroutinesStore.RemoveAt(coroTupleIndex);
+                }
+            }
+        }
+
+        private static void ProcessCoroList(List<IEnumerator> target)
+        {
+            if (target.Count == 0) return;
+
+            // use a temp list to make sure waits made during processing are not handled by same processing invocation
+            // additionally, a temp list reduces allocations compared to an array
+            tempList.AddRange(target);
+            target.Clear();
+            foreach (var enumerator in tempList) ProcessNextOfCoroutine(enumerator);
+            tempList.Clear();
+        }
+
+        internal static void Process()
+        {
+            for (var i = ourCoroutinesStore.Count - 1; i >= 0; i--)
+            {
+                var tuple = ourCoroutinesStore[i];
+                if (tuple.WaitCondition is WaitForSeconds waitForSeconds)
+                {
+                    if ((waitForSeconds.m_Seconds -= Time.deltaTime) <= 0)
+                    {
+                        ourCoroutinesStore.RemoveAt(i);
+                        ProcessNextOfCoroutine(tuple.Coroutine);
+                    }
+                }
+            }
+
+            ProcessCoroList(ourNextFrameCoroutines);
+        }
+
+        internal static void ProcessWaitForFixedUpdate() => ProcessCoroList(ourWaitForFixedUpdateCoroutines);
+
+        internal static void ProcessWaitForEndOfFrame() => ProcessCoroList(ourWaitForEndOfFrameCoroutines);
+
+        private static void ProcessNextOfCoroutine(IEnumerator enumerator)
+        {
+            try
+            {
+                if (!enumerator.MoveNext()) // Run the next step of the coroutine. If it's done, restore the parent routine
+                {
+                    var indices = ourCoroutinesStore.Select((it, idx) => (idx, it)).Where(it => it.it.WaitCondition == enumerator).Select(it => it.idx).ToList();
+                    for (var i = indices.Count - 1; i >= 0; i--)
+                    {
+                        var index = indices[i];
+                        ourNextFrameCoroutines.Add(ourCoroutinesStore[index].Coroutine);
+                        ourCoroutinesStore.RemoveAt(index);
+                    }
+                    return;
+                }
+            }
+            catch (Exception e)
+            {
+                ExplorerCore.LogError(e.ToString());
+                Stop(FindOriginalCoro(enumerator)); // We want the entire coroutine hierachy to stop when an error happen
+            }
+
+            var next = enumerator.Current;
+            switch (next)
+            {
+                case null:
+                    ourNextFrameCoroutines.Add(enumerator);
+                    return;
+                case WaitForFixedUpdate _:
+                    ourWaitForFixedUpdateCoroutines.Add(enumerator);
+                    return;
+                case WaitForEndOfFrame _:
+                    ourWaitForEndOfFrameCoroutines.Add(enumerator);
+                    return;
+                case WaitForSeconds _:
+                    break; // do nothing, this one is supported in Process
+                case Il2CppObjectBase il2CppObjectBase:
+                    var nextAsEnumerator = il2CppObjectBase.TryCast<Il2CppSystem.Collections.IEnumerator>();
+                    if (nextAsEnumerator != null) // il2cpp IEnumerator also handles CustomYieldInstruction
+                        next = new Il2CppEnumeratorWrapper(nextAsEnumerator);
+                    else
+                        ExplorerCore.LogWarning($"Unknown coroutine yield object of type {il2CppObjectBase} for coroutine {enumerator}");
+                    break;
+            }
+
+            ourCoroutinesStore.Add(new CoroTuple { WaitCondition = next, Coroutine = enumerator });
+
+            if (next is IEnumerator nextCoro)
+                ProcessNextOfCoroutine(nextCoro);
+        }
+
+        private static IEnumerator FindOriginalCoro(IEnumerator enumerator)
+        {
+            int index = ourCoroutinesStore.FindIndex(ct => ct.WaitCondition == enumerator);
+            if (index == -1)
+                return enumerator;
+            return FindOriginalCoro(ourCoroutinesStore[index].Coroutine);
+        }
+
+        private class Il2CppEnumeratorWrapper : IEnumerator
+        {
+            private readonly Il2CppSystem.Collections.IEnumerator il2cppEnumerator;
+
+            public Il2CppEnumeratorWrapper(Il2CppSystem.Collections.IEnumerator il2CppEnumerator) => il2cppEnumerator = il2CppEnumerator;
+            public bool MoveNext() => il2cppEnumerator.MoveNext();
+            public void Reset() => il2cppEnumerator.Reset();
+            public object Current => il2cppEnumerator.Current;
+        }
+    }
+}
+#endif

src/Core/Runtime/Il2Cpp/Il2CppProvider.cs

@@ -10,6 +10,7 @@ using UnhollowerRuntimeLib;
 using UnityEngine;
 using UnityEngine.Events;
 using UnityEngine.SceneManagement;
+using System.Collections;
 
 namespace UnityExplorer.Core.Runtime.Il2Cpp
 {
@@ -41,6 +42,11 @@ namespace UnityExplorer.Core.Runtime.Il2Cpp
             }
         }
 
+        public override void StartConsoleCoroutine(IEnumerator routine)
+        {
+            Il2CppCoroutine.Start(routine);
+        }
+
         internal delegate IntPtr d_LayerToName(int layer);
 
         public override string LayerToName(int layer)

src/Core/Runtime/Mono/MonoProvider.cs

@@ -1,5 +1,6 @@
 #if MONO
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
@@ -7,6 +8,7 @@ using System.Text;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using UnityExplorer.Core;
+using UnityExplorer.Core.CSharp;
 
 namespace UnityExplorer.Core.Runtime.Mono
 {
@@ -25,6 +27,11 @@ namespace UnityExplorer.Core.Runtime.Mono
             //SceneManager.activeSceneChanged += ExplorerCore.Instance.OnSceneLoaded2;
         }
 
+        public override void StartConsoleCoroutine(IEnumerator routine)
+        {
+            DummyBehaviour.Instance.StartCoroutine(routine);
+        }
+
         public override string LayerToName(int layer)
             => LayerMask.LayerToName(layer);
 
@@ -50,4 +57,12 @@ namespace UnityExplorer.Core.Runtime.Mono
     }
 }
 
+public static class MonoExtensions
+{
+    public static void Clear(this StringBuilder sb)
+    {
+        sb.Remove(0, sb.Length);
+    }
+}
+
 #endif

src/Core/Runtime/RuntimeProvider.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -36,6 +37,8 @@ namespace UnityExplorer.Core.Runtime
 
         public abstract void SetupEvents();
 
+        public abstract void StartConsoleCoroutine(IEnumerator routine);
+
         // Unity API handlers
 
         public abstract string LayerToName(int layer);