yyerror strlen question

[tys lefering]

Hi,
using YYERROR_VERBOSE in a bison grammar to get a verbose
error message at yyerror() it is not mentioned how large
the error message string may be in the manual or source
http://www.gnu.org/software/bison/manual/bison.html#Error-Reporting
reading in the generated yacc y.tab.c the string looks to be
generated with:
static int yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg, int
yystate, int yytoken)
which has a limit om max. 5 args with enum { YYERROR_VERBOSE_ARGS_MAXIMUM
= 5 };
and resulting longest string is like this:
YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or
%s"));
is this correct ?
then the longest yyerror string depends on the token names lenght ?
passing the yyerror string in a gui program to a window and
need to estimate how long the yyerror string may be.
Thanks,
Tys lefering