makeindex broken in TL22

[ttk at t-lab.opal.ne.jp]

Hi Frank, all,

I have committed patches of makeindex r63361, r63365
in order to improve heuristic detection of page numbers between roman number and alphabet.
The new algorism will fix issues caused by ambiguous inputs.
The new test cases are included in Build/sources/texk/makeindexk/tests/
https://tug.org/svn/texlive/trunk/Build/source/texk/makeindexk/tests/
It is still heuristic and not perfect,
but will correctly detect roman number and alphabet in most realistic cases.

I think makeindex in TL20 or earlier will fail to detect roman number in the following input.
I do not think TL21 is worse than TL20 or earlier.

input:

\indexentry {foo}{i-13}
\indexentry {foo}{i-15}
\indexentry {foo}{i-16}
\indexentry {foo}{i-17}
\indexentry {foo}{ii-10}
\indexentry {foo}{ii-20}

Best,
Takuji


> Hi Frank,
> 
> Thank you for your report.
> I guess my commit r60547 made the degrade.
> https://tug.org/svn/texlive?view=revision&revision=60547
> 
> For workaround,
> it seems fixed by explicit definition of page_precedence in *.ist.
> 
> pp1.ist :
> 
> page_precedence "nR"
> 
> or
> 
> pp2.ist :
> 
> page_precedence "Rn"
> 
> I will study the issue of page_precedence again.
> 
> Best,
> Takuji
> 
> 
> > Hi folks,
> > 
> > reviewing the index for TLC3 (which is rather large) gave me a small 
> > heart attack it came out rather scrambled after upgrading to TL22
> > 
> > I gut it down the a reasonable size:
> > 
> > input:
> > 
> > \indexentry {foo}{I-13}
> > \indexentry {foo}{I-15}
> > \indexentry {foo}{I-16}
> > \indexentry {foo}{I-17}
> > \indexentry {foo}{II-10}
> > \indexentry {foo}{II-20}
> > 
> > with darwin-universal/makexindex (no options no style no nothing) from 
> > TL22 I get
> > 
> >    \item foo, II-10, II-20, I-13, I-15--I-17
> > 
> > upmendex does it correctly and so does makeindex in TL21 and TL20, all 
> > giving
> > 
> >    \item foo, I-13, I-15--I-17, II-10, II-20
> > 
> > as expected
> > 
> > ---------
> > 
> > Ulrike confirmed that it is also a problem on windows and with miktex, 
> > so not a question of MacOS
> > 
> > cheers
> > frank
> >
>