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입력 코드에서 발생하는 구문 오류의 번호를 내 코드가 인쇄하도록하십시오. 내 코드는 다음과 같습니다.bison-flex에서 구문 오류를 계산하는 방법
%{
#include <stdio.h>
#include <math.h>
void yyerror(char *);
extern int yylval;
extern FILE *yyin;
extern FILE *yyout;
extern yylineno;
extern int yyparse(void);
extern int yylex(void);
extern int yywrap() { return 1; }
extern char* yytext;
int errors;
%}
%debug
%start m_class
%token IF ELSE INT CHAR CLASS NEW GURISE VOID WHILE
%token PUBLIC PROTECTED PRIVATE STATIC FINAL ABSTRACT
%token PLUS MINUS MUL DIV MODULO
%token EQ NEQ GRT LT GREQ LEQ
%token OR AND NOT
%token AR_PAR DEK_PAR AR_AGK DEK_AGK AR_STRO DEK_STRO
%token SEMICOLON ANATHESI COMA
%token MY_INT SINT MY_CHAR ID
%right ANATHESI
%left OR AND
%nonassoc EQ NEQ GRT LT GREQ LEQ
%left PLUS MINUS MUL DIV MODULO
%right NOT
%right "then" ELSE
%%
m_class: m_class class_declaration
| class_declaration
| error "\n" {yyerrok; errors++; yyclearin;}
;
class_declaration: CLASS ID class_body
| error "\n" {yyerrok; errors++; yyclearin;}
;
class_body: AR_STRO variable_declaration constructor method_declaration DEK_STRO
| error "\n" {yyerrok; errors++; yyclearin;}
;
variable_declaration:variable variable_declaration
|variable
|array_declaration
|array_declaration variable_declaration
| error "\n" {yyerrok; errors++; yyclearin;}
;
variable: var_type ID SEMICOLON
| error "\n" {yyerrok; errors++; yyclearin;}
;
var_type: INT
|CHAR
| error "\n" {yyerrok; errors++; yyclearin;}
;
array_declaration: ID ANATHESI NEW var_type AR_AGK MY_INT DEK_AGK SEMICOLON
| error "\n" {yyerrok; errors++; yyclearin;}
;
constructor: modifier ID AR_STRO variable_declaration DEK_STRO
| error "\n" {yyerrok; errors++; yyclearin;}
;
modifier: PUBLIC
| PROTECTED
| PRIVATE
| STATIC
| FINAL
| ABSTRACT
| error "\n" {yyerrok; errors++; yyclearin;}
;
method_declaration: modifier meth_type ID parameters meth_body
| error "\n" {yyerrok; errors++; yyclearin;}
;
meth_type: VOID
| var_type
| error "\n" {yyerrok; errors++; yyclearin;}
;
parameters: AR_PAR par_body DEK_PAR
| error "\n" {yyerrok; errors++; yyclearin;}
;
par_body: var_type ID
| par_body COMA var_type ID
| error "\n" {yyerrok; errors++; yyclearin;}
;
meth_body: AR_STRO bodybuilder DEK_STRO
| error "\n" {yyerrok; errors++; yyclearin;}
;
bodybuilder: statement GURISE expression SEMICOLON
|statement bodybuilder
|statement
| error "\n" {yyerrok; errors++; yyclearin;}
;
statement: anathesh
| if_statement
| while_statement
| error "\n" {yyerrok; errors++; yyclearin;}
;
anathesh:atath SEMICOLON
| atath numeric_expression SEMICOLON
| error "\n" {yyerrok; errors++; yyclearin;}
;
atath: ID ANATHESI orisma
|ID AR_AGK MY_INT DEK_AGK ANATHESI orisma
| error "\n" {yyerrok; errors++; yyclearin;}
;
orisma: ID
|MY_INT
|SINT
|MY_CHAR
| error "\n" {yyerrok; errors++; yyclearin;}
;
expression: testing_expression
| numeric_expression
| logical_expression
| ID
| MY_INT
| SINT
| MY_CHAR
| error "\n" {yyerrok; errors++; yyclearin;}
;
numeric_expression: expression PLUS expression
| expression MINUS expression
| expression MUL expression
| expression DIV expression
| expression MODULO expression
| error "\n" {yyerrok; errors++; yyclearin;}
;
testing_expression: expression EQ expression
| expression NEQ expression
| expression GRT expression
| expression LT expression
| expression GREQ expression
| expression LEQ expression
| error "\n" {yyerrok; errors++; yyclearin;}
;
logical_expression: expression OR expression
| expression AND expression
| expression NOT expression
| error "\n" {yyerrok; errors++; yyclearin;}
;
if_statement: IF sin8iki statement %prec "then"
| IF sin8iki statement ELSE statement
| error "\n" {yyerrok; errors++; yyclearin;}
;
sin8iki: AR_PAR testing_expression DEK_PAR
| AR_PAR logical_expression DEK_PAR
| error "\n" {yyerrok; errors++; yyclearin;}
;
while_statement: WHILE sin8iki statement
| error "\n" {yyerrok; errors++; yyclearin;}
;
%%
void yyerror(char *s) {
errors++;
printf("\n------- ERROR AT LINE #%d.\n\n", yylineno);
fprintf(stderr, "%d: error: '%s' at '%s', yylval=%u\n", yylineno, s, yytext, yylval);
}
int main (int argc, char **argv) {
++argv;
--argc;
errors=0;
if (argc > 0)
yyin = fopen (argv[0], "r");
else
yyin = stdin;
yyout = fopen ("output","w");
yyparse();
if(errors==0)
printf("komple");
else
printf("la8oi: %d", errors);
return 0;
}
나는 yyerrok를 수정하려고했지만 그럴 수없는 것 같습니다. 나는 또한 for 루프에 yyparse를 넣으려고했다. 입력 파일에 구문 오류가 5 개 있지만 인쇄는 1 !!!!!! 어떤 아이디어?
환영을 참조하십시오. 태그를 지정할 때주의하십시오. Flex는 Adobe/Apache UI 프레임 워크에 사용됩니다. Flex-Lexer는 어휘 분석기 용으로 사용됩니다. – JeffryHouser