public void Build()
{
var type = method.DeclaringType;
genericType = type;
if (type.HasGenericParameters)
{
genericType = type.MakeGenericInstanceType(type.GenericParameters.ToArray());
}
var proceedClassName = weaver.GenerateUniqueName(method, extensionPoint.AttributeType, "Proceed");
proceedStruct = new TypeDefinition(method.DeclaringType.Namespace, proceedClassName, TypeAttributes.NestedPrivate | WeaverContext.Struct, weaver.Context.ValueType);
proceedStructConstructor = null;
if (!method.IsStatic)
{
instanceField = new FieldDefinition("$this", FieldAttributes.Private, genericType);
proceedStruct.Fields.Add(instanceField);
proceedStructConstructor = new MethodDefinition(".ctor", WeaverContext.Constructor, weaver.TypeSystem.VoidReference);
proceedStructConstructor.Parameters.Add(new ParameterDefinition(genericType));
proceedStructConstructor.Body = new MethodBody(proceedStructConstructor);
proceedStructConstructor.Body.InitLocals = true;
proceedStructConstructor.Body.Emit(il =>
{
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Stfld, instanceField);
il.Emit(OpCodes.Ret);
});
proceedStruct.Methods.Add(proceedStructConstructor);
proceedStructConstructorReference = proceedStructConstructor;
}
else
{
proceedStructConstructorReference = null;
}
method.DeclaringType.CopyGenericParameters(proceedStruct);
method.CopyGenericParameters(proceedStruct);
method.DeclaringType.NestedTypes.Add(proceedStruct);
var original = method.MoveImplementation($"{method.Name}$Original");
proceedStruct.Methods.Add(Proceed);
ProceedReference = Proceed;
TypeReference genericProceedType = proceedStruct;
if (type.HasGenericParameters || method.HasGenericParameters)
{
genericProceedType = proceedStruct.MakeGenericInstanceType(type.GenericParameters.Concat(method.GenericParameters).ToArray());
ProceedReference = Proceed.Bind((GenericInstanceType)genericProceedType);
proceedStructConstructorReference = proceedStructConstructor?.Bind((GenericInstanceType)genericProceedType);
}
proceedStructType = genericProceedType;
genericProceedTargetMethod = original;
if (type.HasGenericParameters || method.HasGenericParameters)
{
var genericMethodArguments = proceedStruct.GenericParameters.Skip(type.GenericParameters.Count).ToArray();
genericProceedTargetMethod = genericProceedTargetMethod.BindMethod(genericType, genericMethodArguments);
}
}
