[PYTHONMAC-SIG] UNIX files

[Guido van Rossum]

> I was originally thinking about a solution in this vein, but I think that it 
> is better to give an error. The problem with such an "accept everything" 
> approach is that it will cause confusion in another place: when you open a 
> unix textfile in your python program.

Hmm...  This is really a problem with the CW stdio library -- it
appears to *swap* CR and LF in text translation mode.  If it just
mapped CR to LF and left LF alone, we'd have no problems (until
someone tries a DOS file, which will appear to be double-spaced).

> My suggestion would be to make \r be illegal to the parser. There is
> currently code in tokenizer.c that explicitly turns \r into \n, if
> this were disabled (and a decent error message was given, such as
> "SyntaxError, \r in line (non-native text file?)" this problem would
> easily be catched.

The only code I can find turns CR LF into LF, which would be fine to
convert DOS files when read in binary mode.

--Guido van Rossum (home page: http://www.python.org/~guido/)


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