Replace DelegateHelper with pre-generated delegates (#4867)

1 files changed, 0 insertions, 104 deletions

diff --git a/src/ARMeilleure/Translation/DelegateHelper.cs b/src/ARMeilleure/Translation/DelegateHelper.cs
deleted file mode 100644
index 43a39bab..00000000
--- a/src/ARMeilleure/Translation/DelegateHelper.cs
+++ /dev/null
@@ -1,104 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
-using System.Reflection.Emit;
-
-namespace ARMeilleure.Translation
-{
-    static class DelegateHelper
-    {
-        private const string DelegateTypesAssemblyName = "JitDelegateTypes";
-
-        private static readonly ModuleBuilder _modBuilder;
-
-        private static readonly Dictionary<string, Type> _delegateTypesCache;
-
-        static DelegateHelper()
-        {
-            AssemblyBuilder asmBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(DelegateTypesAssemblyName), AssemblyBuilderAccess.Run);
-
-            _modBuilder = asmBuilder.DefineDynamicModule(DelegateTypesAssemblyName);
-
-            _delegateTypesCache = new Dictionary<string, Type>();
-        }
-
-        public static Delegate GetDelegate(MethodInfo info)
-        {
-            ArgumentNullException.ThrowIfNull(info);
-
-            Type[] parameters = info.GetParameters().Select(pI => pI.ParameterType).ToArray();
-            Type   returnType = info.ReturnType;
-
-            Type delegateType = GetDelegateType(parameters, returnType);
-
-            return Delegate.CreateDelegate(delegateType, info);
-        }
-
-        private static Type GetDelegateType(Type[] parameters, Type returnType)
-        {
-            string key = GetFunctionSignatureKey(parameters, returnType);
-
-            if (!_delegateTypesCache.TryGetValue(key, out Type delegateType))
-            {
-                delegateType = MakeDelegateType(parameters, returnType, key);
-
-                _delegateTypesCache.TryAdd(key, delegateType);
-            }
-
-            return delegateType;
-        }
-
-        private static string GetFunctionSignatureKey(Type[] parameters, Type returnType)
-        {
-            string sig = GetTypeName(returnType);
-
-            foreach (Type type in parameters)
-            {
-                sig += '_' + GetTypeName(type);
-            }
-
-            return sig;
-        }
-
-        private static string GetTypeName(Type type)
-        {
-            return type.FullName.Replace(".", string.Empty);
-        }
-
-        private const MethodAttributes CtorAttributes =
-            MethodAttributes.RTSpecialName |
-            MethodAttributes.HideBySig     |
-            MethodAttributes.Public;
-
-        private const TypeAttributes DelegateTypeAttributes =
-            TypeAttributes.Class     |
-            TypeAttributes.Public    |
-            TypeAttributes.Sealed    |
-            TypeAttributes.AnsiClass |
-            TypeAttributes.AutoClass;
-
-        private const MethodImplAttributes ImplAttributes =
-            MethodImplAttributes.Runtime |
-            MethodImplAttributes.Managed;
-
-        private const MethodAttributes InvokeAttributes =
-            MethodAttributes.Public    |
-            MethodAttributes.HideBySig |
-            MethodAttributes.NewSlot   |
-            MethodAttributes.Virtual;
-
-        private static readonly Type[] _delegateCtorSignature = { typeof(object), typeof(IntPtr) };
-
-        private static Type MakeDelegateType(Type[] parameters, Type returnType, string name)
-        {
-            TypeBuilder builder = _modBuilder.DefineType(name, DelegateTypeAttributes, typeof(MulticastDelegate));
-
-            builder.DefineConstructor(CtorAttributes, CallingConventions.Standard, _delegateCtorSignature).SetImplementationFlags(ImplAttributes);
-
-            builder.DefineMethod("Invoke", InvokeAttributes, returnType, parameters).SetImplementationFlags(ImplAttributes);
-
-            return builder.CreateTypeInfo();
-        }
-    }
-}