private void ConfigureMethod(MethodInfo method, ParameterInfo[] parameters)
{
var returnType = method.ReturnType;
var isVoid = returnType == typeof(void);
if (isVoid)
{
_dispatchType |= DispatchType.Void;
LogicalReturnType = returnType;
}
else if (typeof(Promise).IsAssignableFrom(returnType))
{
_dispatchType |= DispatchType.Promise;
var promise = returnType.GetOpenTypeConformance(typeof(Promise <>));
LogicalReturnType = promise != null
? promise.GetGenericArguments()[0]
: typeof(object);
}
else if (typeof(Task).IsAssignableFrom(returnType))
{
_dispatchType |= DispatchType.Task;
var task = returnType.GetOpenTypeConformance(typeof(Task <>));
LogicalReturnType = task != null
? task.GetGenericArguments()[0]
: typeof(object);
}
else
{
LogicalReturnType = returnType;
}
if (!method.IsGenericMethodDefinition)
{
switch (parameters.Length)
{
#region Early Bound
case 0:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallNoArgs(method)
: RuntimeHelper.CreateFuncNoArgs(method);
_dispatchType |= DispatchType.FastNoArgs;
return;
case 1:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallOneArg(method)
: RuntimeHelper.CreateFuncOneArg(method);
_dispatchType |= DispatchType.FastOneArg;
return;
case 2:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallTwoArgs(method)
: RuntimeHelper.CreateFuncTwoArgs(method);
_dispatchType |= DispatchType.FastTwoArgs;
return;
case 3:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallThreeArgs(method)
: RuntimeHelper.CreateFuncThreeArgs(method);
_dispatchType |= DispatchType.FastThreeArgs;
return;
case 4:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallFourArgs(method)
: RuntimeHelper.CreateFuncFourArgs(method);
_dispatchType |= DispatchType.FastFourArgs;
return;
case 5:
_delegate = isVoid
? (Delegate)RuntimeHelper.CreateCallFiveArgs(method)
: RuntimeHelper.CreateFuncFiveArgs(method);
_dispatchType |= DispatchType.FastFiveArgs;
return;
#endregion
default:
_dispatchType |= DispatchType.LateBound;
return;
}
}
var argSources = parameters
.Where(p => p.ParameterType.ContainsGenericParameters)
.Select(p => Tuple.Create(p.Position, p.ParameterType))
.ToList();
if (returnType.ContainsGenericParameters)
{
if (IsAsync)
{
returnType = returnType.GenericTypeArguments[0];
}
argSources.Add(Tuple.Create(UseReturn, returnType));
}
var methodArgs = method.GetGenericArguments();
var typeMapping = new Tuple <int, int> [methodArgs.Length];
foreach (var source in argSources)
{
var sourceArg = source.Item2;
if (sourceArg.IsGenericParameter)
{
if (methodArgs.Length == 1 && methodArgs[0] == sourceArg)
{
typeMapping[0] = Tuple.Create(source.Item1, UseArgument);
}
continue;
}
var sourceGenericArgs = sourceArg.GetGenericArguments();
for (var i = 0; i < methodArgs.Length; ++i)
{
if (typeMapping[i] != null)
{
continue;
}
var index = Array.IndexOf(sourceGenericArgs, methodArgs[i]);
if (index >= 0)
{
typeMapping[i] = Tuple.Create(source.Item1, index);
}
}
if (!typeMapping.Contains(null))
{
break;
}
}
if (typeMapping.Contains(null))
{
throw new InvalidOperationException(
$"Type mapping for {method.GetDescription()} could not be inferred");
}
_mapping = typeMapping;
_dispatchType |= DispatchType.LateBound;
_closed = new ConcurrentDictionary <MethodInfo, MethodDispatch>();
}