I'm trying to use GNU bison to parse from a "continuous" stream, that is, I
do want to implement a program similar to a shell: parse one "command" at
a time, process it, and continue until end-of-stream is encountered.
However, I do want my parser to return the parsed tree to the calling
program to process it on each step, so ideally I'd like bison to return
from yyparse() when a complete instance of the start symbol is read, but it
seems it does not do this (waits for special 0-token, as far as I found
out)--to counter-act, I currently do something like this:
start_symbol:
real_start_symbol
{
storeValueForProcession($1);
YYACCEPT;
}
;
Aha, Yes!
Use the push parser that I have just implemented in Bison. You will be
the first beta tester. The documentation should be in CVS and you need a
CVS version of bison.
Thanks for the hint, it looks neat as far as I have seen yet! But I'm
not yet sure how this will help me exactly; will yypush_parse return
without this YYPUSHMORE whenever it encounters the start symbol (or any
symbol?), so I can process it in my code and continue calling
yypush_parse afterwards, with the state including all look-ahead conserved?
BTW, how does one bootstrap the autotools stuff for bison? Trying
myself with aclocal; automake -a; autoheader; autoconf (like this) gives
me errors in the resulting configure related to gl_* symbols; I suspect
that autoconf is missing some m4-files or the like?
Cheers,
Daniel
--
Got two Dear-Daniel-Instant Messages
by MSN, associate ICQ with stress--so
please use good, old E-MAIL!
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