private Expression[] GetAllArgs(Expression[] args, Reference targetField)
{
var allArgs = new Expression[args.Length + 1];
args.CopyTo(allArgs, 1);
allArgs[0] = new ConvertExpression(targetType, targetField.ToExpression());
return allArgs;
}
protected void CreateIInvocationInvokeOnTarget(
ClassEmitter targetTypeEmitter,
NestedClassEmitter nested,
ParameterInfo[] parameters,
FieldReference targetField,
MethodInfo callbackMethod)
{
const MethodAttributes methodAtts = MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual;
MethodEmitter method =
nested.CreateMethod ("InvokeMethodOnTarget", methodAtts, typeof (void));
Expression[] args = new Expression[parameters.Length];
// Idea: instead of grab parameters one by one
// we should grab an array
Hashtable byRefArguments = new Hashtable();
for(int i = 0; i < parameters.Length; i++)
{
ParameterInfo param = parameters[i];
Type paramType = param.ParameterType;
if (HasGenericParameters(paramType))
{
paramType = paramType.GetGenericTypeDefinition().MakeGenericType(nested.GetGenericArgumentsFor(paramType));
}
else if (paramType.IsGenericParameter)
{
paramType = nested.GetGenericArgument(paramType.Name);
}
if (paramType.IsByRef)
{
LocalReference localReference = method.CodeBuilder.DeclareLocal(paramType.GetElementType());
method.CodeBuilder.AddStatement(
new AssignStatement(localReference,
new ConvertExpression(paramType.GetElementType(),
new MethodInvocationExpression(SelfReference.Self,
typeof(AbstractInvocation).GetMethod(
"GetArgumentValue"),
new LiteralIntExpression(i)))));
ByRefReference byRefReference = new ByRefReference(localReference);
args[i] = new ReferenceExpression(byRefReference);
byRefArguments[i] = localReference;
}
else
{
args[i] =
new ConvertExpression(paramType,
new MethodInvocationExpression(SelfReference.Self,
typeof(AbstractInvocation).GetMethod("GetArgumentValue"),
new LiteralIntExpression(i)));
}
}
MethodInvocationExpression baseMethodInvExp;
if (callbackMethod.IsGenericMethod)
{
callbackMethod = callbackMethod.MakeGenericMethod(nested.GetGenericArgumentsFor(callbackMethod));
}
baseMethodInvExp = new MethodInvocationExpression(targetField, callbackMethod, args);
baseMethodInvExp.VirtualCall = true;
LocalReference ret_local = null;
if (callbackMethod.ReturnType != typeof(void))
{
if (callbackMethod.ReturnType.IsGenericParameter)
{
ret_local = method.CodeBuilder.DeclareLocal(nested.GetGenericArgument(callbackMethod.ReturnType.Name));
}
else if (HasGenericParameters(callbackMethod.ReturnType))
{
ret_local =
method.CodeBuilder.DeclareLocal(
callbackMethod.ReturnType.GetGenericTypeDefinition().MakeGenericType(
nested.GetGenericArgumentsFor(callbackMethod.ReturnType)));
}
else
{
ret_local = method.CodeBuilder.DeclareLocal(callbackMethod.ReturnType);
}
method.CodeBuilder.AddStatement(new AssignStatement(ret_local, baseMethodInvExp));
}
else
{
method.CodeBuilder.AddStatement(new ExpressionStatement(baseMethodInvExp));
}
foreach(DictionaryEntry byRefArgument in byRefArguments)
{
int index = (int) byRefArgument.Key;
LocalReference localReference = (LocalReference) byRefArgument.Value;
method.CodeBuilder.AddStatement(
new ExpressionStatement(
new MethodInvocationExpression(SelfReference.Self,
typeof(AbstractInvocation).GetMethod("SetArgumentValue"),
new LiteralIntExpression(index),
new ConvertExpression(typeof(object), localReference.Type,
new ReferenceExpression(localReference)))
));
}
if (callbackMethod.ReturnType != typeof(void))
{
MethodInvocationExpression setRetVal =
new MethodInvocationExpression(SelfReference.Self,
typeof(AbstractInvocation).GetMethod("set_ReturnValue"),
new ConvertExpression(typeof(object), ret_local.Type, ret_local.ToExpression()));
method.CodeBuilder.AddStatement(new ExpressionStatement(setRetVal));
}
method.CodeBuilder.AddStatement(new ReturnStatement());
}