D. Richard Hipp wrote:
John Cohen wrote:
The last suggestion worked great (thanks!). But still, I still have a
small problem. It won't accept more than one 'statement'. I know
why, but can't fix it. Take a look:
$ ./a.out
7 + 9 + 7 + 3 / (5 + 7);
23.25
3 + 3 + 3;
Fatal Error: Parser is hopelessly lost...
Now, I know why, because my grammar look like this:
in ::= stmt ENDLINE.
stmt(A) ::= expression. { printf("%u\n", a); }
expression(A) ::= INTEGER(B). { A = B; }
expression(A) ::= expression(B) PPLUS expression(C). { A = B + C; }
expression(A) ::= expression(B) PSUB expression(C). { A = B - C; }
...etc...
Now its obvious why that will only accept one statement, but how to
fix it? SQLite doesn't offer any help here because the parser seems
to be reinitialized each statement, but that really isn't an option in
my case. Is there any way? In bison, you can simply make the start
token right recursive (like in my last message):
in ::= in stmt ENDLINE.
There's a bug in lemon such that it doesn't like the primary
non-terminal to be recursive. So do this:
main ::= in.
Then in addition to what you have it should work.
Correction: There *used* to be this bug in lemon. I think
it is now fixed. The problem above is that there is no
initial case for the in term. You need this:
in ::= .
in ::= in stmt ENDLINE.
--
D. Richard Hipp -- [EMAIL PROTECTED] -- 704.948.4565
