Re: Run mousetrap

[Paul E Johnson]

Lines 82 and 90 and 98 of the file you refer to have flaws in them so 
that they do not match the Swarm snapshot you are using.

They indicate you should change this:
  priceElement = [priceGraph createElement];
  [[[priceElement setLabel: "price"] setColor: "red"] setWidth: 3];

To something like:
   priceElement = [priceGraph createElement];
   [priceElement setLabel: "price"];
   [priceElement setColor: "red"];
   [priceElement setWidth: 3];

THe key here is that methods like "setLabel", "setColor" and "setWidth" 
now return void, and so you can't act as if they return the same object 
and then string together a bunch of statements like we used to in the 
old days. THere was a big flame war about this style about 4 years ago.

I see this problem pretty often in the adaptation of code from 2.1.1 
Swarm and before to work with the newest snaps.  It happens because of 
some cleaning up of the Java Native Interface.

pj

Li An wrote:
> Dear Paul,
>
>
> > I would suggest you either do
2.1
> address@hidden
>   -I/usr/include/swarm MarketObserverSwarm.m
> cc1obj: warnings being treated as errors
> MarketObserverSwarm.m: In function `-[MarketObserverSwarm buildObjects]':
> MarketObserverSwarm.m:82: warning: invalid receiver type `void '
> MarketObserverSwarm.m:82: void value not ignored as it ought to be
> MarketObserverSwarm.m:82: invalid use of void expression
> MarketObserverSwarm.m:82: warning: invalid receiver type `void '
> MarketObserverSwarm.m:82: void value not ignored as it ought to be
> MarketObserverSwarm.m:82: invalid use of void expression
> MarketObserverSwarm.m:90: warning: invalid receiver type `void '
> MarketObserverSwarm.m:90: void value not ignored as it ought to be
> MarketObserverSwarm.m:90: invalid use of void expression
> MarketObserverSwarm.m:98: warning: invalid receiver type `void '
> MarketObserverSwarm.m:98: void value not ignored as it ought to be
> MarketObserverSwarm.m:98: invalid use of void expression
> make: *** [MarketObserverSwarm.o] Error 1
>
> What is wrong? thanks.



--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
1541 Lilac Lane, Rm 504
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66044-3177           FAX: (785) 864-5700


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