> On 27 Sep 2021, at 22:02, Akim Demaille <a...@lrde.epita.fr> wrote: > > Hi Hans, > >> Le 27 sept. 2021 à 20:54, Hans Åberg <haber...@telia.com> a écrit : >> >> In order to generate better syntax error messages writing out the input line >> with the error and a line with a marker underneath, I thought of checking >> how Bison does it, but I could not find the place in its sources. >> —Specifically, a suggestion is to tweak YY_INPUT in the lexer to buffer one >> input line at a time, but Bison does not seem to do that. > > No, I keep track of the byte offset in the file, and print from the file, > which I reopen to quote the source.
In C++, I can do that using tellg and seekg without reopening the file, and then search for the line, which is an easy hack.
