I'm trying to write a simple grammar for propositional logic for a project
of mine, with support for AND, OR, XOR, NOT. Nothing fancy, only I cant seem
to come up with a correct grammar. My simple test cases all give me syntax
errors.
Anyone mind taking a look at it?
Thanks
Marty
syntaxAnalyzer
Know that feeling alright...
On Wed, Sep 1, 2010 at 1:13 AM, Alfonso Urdaneta wrote:
> On 9/1/10 1:01 AM, Martin McDermott wrote:
>
>> I'm trying to write a simple grammar for propositional logic for a project
>> of mine, with support for AND, OR, XOR, NOT. Nothing fan
Any comments on why I would be getting a syntax error?
On Wed, Sep 1, 2010 at 1:50 AM, John P. Hartmann wrote:
> -- Forwarded message --
> From: John P. Hartmann
> Date: 1 September 2010 07:49
> Subject: Re: grammar for propositional logic
> To: Martin McDer
I hate to keep dragging this out but this isnt helping me very much. I now
know that my syntax error is because of "unexpected $undefined, expecting
$end or '\n'", but adding a newline to my test_file doesn't fix this issue.
I'm not sure how my input does not conform to my grammar.
Thanks everyon
Flex doesn't give me any output and looking online it looks like whitespace
wouldn't be causing this. For everything else I used the "." to have misc
things printed out.
So I'm not sure how thats possible or where its coming from. I attached the
file in case anyone feels like taking a look.
lexi
h is why it doesn't tell you
> anything.
>
> Assuming you don't care about whitespace, you need to split the rule
> on line 39 into
>
> [ \t\r] ;
> [\n] {lexEcho("%s", yytext); return yytext[0];}
>
> The default rule needs t
