[ri4pp:2006] - Re: Oporavak od gre¹aka (CUP) by jelena markicevic <markicevic011@yahoo.com>

Ja mislim da ne moze jer ce posle BEGIN procitati  statements pa naici na gresku. Oporavice se do prve ; (kao statement)  ali ako recimo poslednji statement, pre END nema ; onda ne moze. Ja  radim byaccj i tu moze da se oporavi ako stavis smenu tipa
  main_function ::=BEGIN statemens error END
  Mozda moze i nekako elegantnije, ali meni je ovo prvo palo na pamet. Mozda ce i kod tebe da uspe...
  Pozz

Vaso Putica <vaso@putica.com> wrote:  Je l' ima neko ideju za¹to dobijam gre¹ku "Couldn't repair and continue 
parse Object" sa ovom gramatikom i test programom? Zar ne bi trebalo da 
"main_function ::= BEGIN error END" odradi oporavak po¹to "error SEMI" 
ne mo¾e jer nedostaje ; iza x?


// CUP ----------------------------------
start with program;

program  ::= prog_decl main_function;
prog_decl ::= PROGRAM ID SEMI;

main_function ::= BEGIN END; 
main_function ::= BEGIN statements END;
main_function ::= BEGIN error END {: 
System.out.println("main_function_error");
:};


statements ::= statement statements;
statements ::= statement;


statement ::= ID EQ INTEGER_LITERAL SEMI;
statement ::= error SEMI {: System.out.println("statement error"); :};



// microJava ----------------------------------
program pp;
begin
 z=4;
 x
end.

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