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Re: Free source code diagramming programs [message #48345 is a reply to message #48304] Thu, 13 April 2006 17:20 Go to previous messageGo to previous message
idlwizard-1@yahoo.com is currently offline  idlwizard-1@yahoo.com
Messages: 11
Registered: December 2005
Junior Member
> Pretty printers (auto-indentation, etc.) lose a lot of information...
> and tend to mess up comments,
> especially when the author carefully lined up the columns of his/her
> comments or code in some sort of table.

Could you elaborate on this? What information is lost by reformatting?

Here is an example from a FORTRAN calculator program, which will also
only line up right if you display in a fixed width font like Courier:

! Problems
if((a.eq.'/' .and. y.eq.0).or. ! Divide by 0
& (a.eq.'1/'.and. y.eq.0).or. ! reciprocal of 0
& (a.eq.'^' .and.(y.lt.0 ! Negatives to
negative power
& .or.(x.eq.0.and.y.eq.0))) then ! Zero to zero power

If you only know IDL,
; Problems
if (a eq '/' and y eq 0) or $ ; Divide by 0
(a eq '1/' and y eq 0) or $ ; reciprocal of 0
(a eq '^' and (y lt 0 $ ; Negatives to
negative power
or (x eq 0 and y eq 0)) then begin ; Zero to zero
power

If you only know C,
/* Problems */
if((strcmp(a,'/' )==0 && y==0) || /* Divide by 0 */
(strcmp(a,'1/')==0 && y==0) || /* reciprocal of 0 */
(strcmp(a,'^' )==0 && (y==0 /* Negatives to negative
power */
|| (x==0 && y==0))) { /* Zero to zero power */

No pretty printer is gonna preserve that.

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