How does flex support bison-location exactly?

Question

I\'m trying to use flex and bison to create a filter, because I want get certain grammar elements from a complex language. My plan is to use flex + bison to recognise the gr

Answer 1

So, I got this to "work", but with a couple of extra steps (I may have overlooked them here ... apologies in that case):

1. In parser.y, I had to say:

   #define YYLEX_PARAM &yylval, &yylloc
   

   even with %locations and bison --locations, to get it to pass the data.

2. In lexer.l I had to use -> instead of . for yylloc

3. Also in lexer.l, I reset the column in the action:

   [\n] { yycolumn = 1; }
   

Obviously a bit more complex, for \r etc, but at least I got it to work.