[Bug-glpk] second issue

[Brady Hunsaker]

The second issue comes from a bug report submitted to the Debian
package of GLPK.  The bug report itself is at
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=175205 

A user complains that while the following assignment works:

  TCasualA[i,j] := table(i in Tattiche, j in Tattiche:
            carica   attacca  circonda agguato  ferma    ritira:
  carica,   Cp2,       .,     Cp1,       .,       .,     Cp3,
  attacca,  Cp2,     Cp1,       .,       .,     Cm1,     Cp2/2,
  circonda,   .,     Cp1,       .,       .,     Cp2,     Cm1/2,
  agguato,  Cp2,     Cp1,     Cm1,       .,     Cm1,     Cm1/2,
  ferma,    Cp2,       .,       .,       .,      .,      .,
  ritira,     .,     0/2,     0/2,   Cm1/2,      .,      .   );

The following alternative does not:

  TCasualA[i,j] := table(i in Tattiche, j in Tattiche:
            carica   attacca  circonda agguato  ferma    ritira:
  carica    Cp2        .      Cp1        .        .      Cp3 
  attacca   Cp2      Cp1        .        .      Cm1      Cp2/2 
  circonda    .      Cp1        .        .      Cp2      Cm1/2 
  agguato   Cp2      Cp1      Cm1        .      Cm1      Cm1/2 
  ferma     Cp2        .        .        .       .       . 
  ritira      .      0/2      0/2    Cm1/2       .       .   );

Cp1, Cp2, and Cm1 are parameters.

The problem is that GLPK interprets the first `.' as indicating a
suffix for Cp2.  But parameters can't have suffixes, so GLPK exits on
error. 

One solution is to make the documentation more clear by stating that
commas may be omitted only if following numerical constants or
periods.  Then the second version above is clearly invalid input.

Another alternative is to change the way that designators are parsed
in glplan5.c.  Instead of checking for a `.' always, it could only be
checked if the token is a variable.  Then both versions above should
work. 

Let me know how you'd like to deal with this so I can help Falk close
the bug report.  

Thanks,
Brady