Re: [Dev-luatex] A design philosophy question...

"Martin Schröder" writes:

2007/4/3, David Kastrup :

...

Anyway, this would make "72.27pt" the same value as "1in". Which was what this was all supposed to be about. Only that I wanted to check that I did not break anything, and things were broken already.

Looks good.

Does this affect the trip test? We should try to keep passing it, if possible. :-)

If the trip test does a good job at capturing TeX's idiosyncrasies, it should break. I have scanned through the source code of the test and still feel sick. Anyway, there are surprisingly few uses of units. So I can't really guess either which way. In some locations he uses numbers with a ridiculous precision (making them exact): in those cases likely neither rounding nor truncation occur. So the change _has_ a possibility of passing the trip test, but if it does so, it is more by accident than by spirit. I have also filed this several months ago as a bug report to Bb, so there is a minuscule chance of Knuth considering a fix upstream at the end of the year. I know that he has an aversion of changing anything with such an impact, but then he wants TeX to become an epitaph, and what kind of epitaph for the author of "The Art of Computing -- Seminumerical Algorithms" would it be if "1in" and "72.27pt" had different values? -- David Kastrup