[futurebasic] Re: [FB] CFIndexRead using FSRef

Message: < previous - next > : Reply : Subscribe : Cleanse
Home   : January 2008 : Group Archive : Group : All Groups

From: Brian Stevens <bstevens33@...>
Date: Fri, 25 Jan 2008 16:20:29 -0700
On Jan 25, 2008, at 3:55 PM, Alain Pastor wrote:
>
> However, I don't know if FBtoC can handle all the possible variants  
> of the syntax.
.ref, ^ref @^ref are all handled in FBtoC

>
> As to the @ symbol, many programmers (among the best I must add)  
> use it as a reminder when calling Toolbox functions: it says that  
> this parameter variable will have its value updated by the Toolbox  
> function being called (besides that's why such a variable must have  
> an address in memory and therefore cannot be located in a  
> register). That symbol is optional in this case and I personally  
> don't use that syntax by laziness.
assume this refers to the the local fn (@x as ^something) syntax?  
versus the using it to obtain the address of something.

AFAIK, the difference between  local fn a (@x as ^something)  versus   
local fn b (x as ^something) is
  the former case can be called via fn a(x) and it knows to send the  
address of x without the programmer explicitly requesting it.

The latter syntax (except for structures) requires the fn b(@x)  
explicit passing of the address

Brian S.