[ir4pp1:2008] - Re: Za asistenta :cudna greska by "Ivan Lukić" <ivan.lukic83@gmail.com>

E drago mi je da si ipak na kraju nasla gresku,
posto ja nisam bas imao ideju kako da ti pomognem
:(
poz

2008/1/21 Ivana <ivanaruti3@yahoo.com>:

> Znam zbog ceka i na koji nacin shift/reduce konflikt nastaje. Problem je
> bio u tome sto u celom .cup file-u nije postojao ni jedan od takvih nacina.
>
> Ja sam samo htela da proverim tacno znacenje one greske kako bi mi to
> pomoglo i bar malo priblizilo delu u fajlu gde se problem nalazi.
>
> Sve u svemu, ja razresih problem koji nije imao veze sa shift/reduce
> conflict-om niti se nalazio u tom delu gde se greska javljala. Problem je
> bio sto sam iskoristila promenljivu koju nisam definisala.
>
>
> *Sasa Vitorovic <savitor85@gmail.com>* wrote:
>
> Pozdrav,
>
> Ja ne znam za automatski nacin. Kad sam ja radio taj deo, posle svake
> izmene proverim da li i dalje mogu da prevedem program.
>
> LR parser ti gleda unapred jedan simbol, pa recimo ako imas
>
> simbol1 akcija1 simbol2 simbol444
>
> i
>
> simbol1 akcija2 simbol2 simbol555
>
> javice ti gresku jer u trenutku kad se simbol1 uparuje, parser ne zna da
> li da ide prvim ili drugim putem. To se ne moze usput uraditi, jer jednom
> kad izvrsis akciju nazad vise nema! Zato ovo ne bi bio problem kad ne bi
> bilo akcije izmedju.
>
> Pozdrav,
>        Sasa Vitorovic
>
> P.S. Ovo je problem cak i kad su akcije iste, jer parser to ne zna.
> Resenje: staviti novi neterminal
>
> POMOCNI1::=simbol1 akcija1
> POMOCNI2::=simbol1 akcija2
>
>
> ----- Original Message -----
> *From:* Ivana <ivanaruti3@yahoo.com>
> *To:* ir4pp1@rti.etf.bg.ac.yu
> *Sent:* Monday, January 21, 2008 1:03 PM
> *Subject:* Re: [ir4pp1] Za asistenta :cudna greska
>
> Dobro, posto si provalio o cemu se radi jel bi mogao sad meni da objasnis
> sta predstavlja ovo NT$21, tj. kako da provalim koji je to neterminal?
> Javlja mi se shift/reduce conflict tipa:
>
> *** Shift/Reduce conflict found in state #16
>   between NT$5 ::= (*)
>   and        Type ::= (*) IDENT
>   under symbol IDENT
>   Resolved in favour of shifting
>
> Pa mene sad interesuje sta oznacava state#16 a sta NT$5 kako bi uspela da
> pronadjem gde se tacno greska nalazi. Od ovog buljenja u ceo .cup file (koji
> je pri tom OGROMAN) nema svrhe, sve mi se cini u najboljem redu.
>
> *Ivan Luki� <ivan.lukic83@gmail.com>* wrote:
>
> Ako bi neko znao da mi objasni sta znaci ovo dole mnogo bih mu/joj bio
> zahvalan.
> Najvise me interesuje ono : Production ... ... never reduced
> Ako niko drugi pouzdam se u asistenta Glisu ;)
> pozdrav svim ljudima dobre volje :)
>
> unapred hvala
>
> D:\Java>java -cp .;d:\; java_cup.Main n35103/MJparser.cup
> Opening files...
> Parsing specification from standard input...
> Checking specification...
> Building parse tables...
>   Computing non-terminal nullability...
>   Computing first sets...
>   Building state machine...
>   Filling in tables...
>   Checking for non-reduced productions...
> *** Production "relop ::= GROREQ " never reduced
> *** Production "relop ::= LESSOREQ " never reduced
> *** Production "relop ::= LESS " never reduced
> *** Production "relop ::= GREATER " never reduced
> *** Production "relop ::= DIFFERS " never reduced
> *** Production "relop ::= EQUALS " never reduced
> *** Production "mulop ::= PERCENT " never reduced
> *** Production "mulop ::= DIV " never reduced
> *** Production "mulop ::= TIMES " never reduced
> *** Production "addop ::= MINUS " never reduced
> *** Production "addop ::= PLUS " never reduced
> *** Production "NT$22 ::= " never reduced
> *** Production "NT$21 ::= " never reduced
> *** Production "f_type ::= IDENT " never reduced
> *** Production "factor ::= LPAREN expr RPAREN " never reduced
> *** Production "factor ::= NEW f_type NT$20 LSQUARE expr RSQUARE " never
> reduced
>
> *** Production "NT$20 ::= " never reduced
> *** Production "factor ::= NEW f_type " never reduced
> *** Production "factor ::= CHARCONST " never reduced
> *** Production "factor ::= NUMBER " never reduced
> *** Production "factor ::= designator LPAREN RPAREN " never reduced
> *** Production "factor ::= designator " never reduced
> *** Production "factor ::= designator LPAREN NT$19 act_pars RPAREN " never
> reduc
> ed
> *** Production "NT$19 ::= " never reduced
> *** Production "factor_list ::= MINUS factor " never reduced
> *** Production "factor_list ::= factor " never reduced
> *** Production "factor_list ::= factor_list mulop factor " never reduced
> *** Production "term ::= factor_list " never reduced
> *** Production "term_list ::= term " never reduced
> *** Production "term_list ::= term_list addop term " never reduced
> *** Production "NT$17 ::= " never reduced
> *** Production "print_ispis ::= " never reduced
> *** Production "NT$15 ::= " never reduced
> *** Production "NT$13 ::= " never reduced
> *** Production "NT$11 ::= " never reduced
> *** Production "NT$9 ::= " never reduced
> *** Production "NT$8 ::= " never reduced
> Writing parser...
> Closing files...
> ------- CUP v0.10k Parser Generation Summary -------
>   0 errors and 37 warnings
>   46 terminals, 87 non-terminals, and 166 productions declared,
>   producing 270 unique parse states.
>   0 terminals declared but not used.
>   0 non-terminals declared but not used.
>   0 productions never reduced.
>   0 conflicts detected (0 expected).
>   Code written to "parser.java", and "sym.java".
> ---------------------------------------------------- (v0.10k)
>
> D:\Java>copy parser.java .\n35103\ /Y
>         1 file(s) copied.
>
> D:\Java>
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>
>
> Pozdrav,
> Ivana
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>
> Pozdrav,
> Ivana
>
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