RE: XFoot with Qualified DS's

["Steve Richter" <srichter@xxxxxxxxxxxxx>]

I dont see the problem with having the parser/compiler classify the "+" or
"-" as a sign symbol only when it is adjacent to a digit character.
   -5   // negative 5
   6+   // positive 6

and never identify "- 6" as negative 6.

the following rpg expression makes no sense, yet is permitted:
  count = count - - 5 ;

99 times out of 100 that is a coding error.  yet the compiler accepts it as
"count = count - -5 ;

also, note that the "," cant be used in a numeric literal because the parser
does not know if it is punctation or a delimeter.

yet the decimal point IS recognized as such only when there is no whitespace
between it and the digit characters.
   amt = amt + 25.5  // ok
   amt = amt + 25 . 5 // not ok.

commas in numeric literals would help:
   EstWorldPopulation = 50000000000 ;  // too many zeros?
   EstWorldPopulation = 5,000,000,000 ; // much more readable.

-Steve

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Bob cozzi
Sent: Tuesday, November 25, 2003 11:24 AM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: XFoot with Qualified DS's


Then what would be the difference between this:

  X = +1;
And this:
  X=+1;
Does this mean X = 1, or X = X + 1?
It would have been worse, in my view, if it were not consistent with C, C++,
Java and other languages that use it.

Bob Cozzi
Cozzi Consulting
www.rpgiv.com


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of M. Lazarus
Sent: Tuesday, November 25, 2003 9:40 AM
To: RPG programming on the AS400 / iSeries
Subject: Re: XFoot with Qualified DS's

At 11/25/03 08:57 AM, you wrote:
>+= is a good thing to remember.  Much like the optional factor 1 in the
>ADD op code.

  Does anyone think that the shorthand syntax is a little backwards?
It replaces this format: X = X + 1 with X += 1.  Shouldn't it be X =+
1?  It's a little easier to visualize putting the X in between the = and +
than having to reverse it.


  I realize that C and it's derivatives do it that way, I just think that
it's a little odd.  JMHO.

  Hans, would it be possible to have the compiler handle both ways?

  -mark

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