Is there way to convert Expression<Func<T, object>>
to Expression<Func<object, object>>
?
How about something like this:
static Expression<Func<object,object>> ConvertFunction<T>(Expression<Func<T,object>> function)
{
ParameterExpression p=Expression.Parameter(typeof(object));
return Expression.Lambda<Func<object,object>>
(
Expression.Invoke(function,Expression.Convert(p,typeof(T))), p
);
}
Then you can say something like this:
Expression<Func<string,object>> foo=s=>s.Length;
Expression<Func<object,object>> bar=ConvertFunction(foo);
var call=bar.Compile();
Console.Write(call("hello")) ; // Prints 5