On 18 Aug 2012, at 22:39, John Levine wrote: >>> You mean, Fortran is not parseable by Bison, is that what you mean? >> >> Not practical. > > I've written Fortran 77 parsers in yacc. It's quite easy. > > The lexical structure of Fortran is dreadful, but once you understand > the hacks required, it's straightforward to pre-scan each statement to > figure out whether it's an assignment or something else. After that, > the tokenization is somewhat context dependent, but not hard. > > It got a lot easier after 1990 once you were allowed to pay attention > to spaces.
I remembered that you mentioned the problem with the lexing, and had a vague memory about that is was about the earlier Fortran versions, but thanks for clarifying the Yacc/Bison part and later Fortran. Hans _______________________________________________ help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
