protected override Expression VisitParameter(ParameterExpression node)
{
object argument;
if (parameterMappings.TryGetValue(node.Name, out argument))
{
if (ReflectionHelper.IsInstanceOf(node.Type, argument))
{
return(Expression.Constant(argument, node.Type));
}
else
{
INotifyExpression expression = argument as INotifyExpression;
if (expression != null && expression.IsConstant)
{
return(Expression.Constant(expression.ValueObject, node.Type));
}
else
{
var notifyValueType = typeof(INotifyValue <>).MakeGenericType(node.Type);
if (notifyValueType.IsInstanceOfType(argument))
{
return(Expression.MakeMemberAccess(Expression.Constant(argument, notifyValueType), ReflectionHelper.GetProperty(notifyValueType, "Value")));
}
}
}
}
return(node);
}
