Compilador/scanner.l at master · rhuam/Compilador · GitHub

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%{

//Inserção das bibliotecas necessárias

#include <stdio.h>
#include "y.tab.h"
#include <stdlib.h>
#include "mytable.h"

//Declarando as assinaturas das funções e criando variaveis globais

extern void yyerror(const char *);
static void comment(void);
int yylineno ;


%}


L   [a-zA-Z_]
A   [a-zA-Z_0-9]
D   [0-9]
NZ  [1-9]
UNDER (_)

WS  [ \t\v\n\f]

%%

"/*"			{ comment(); }
"//".* 			{ /* consume //-comment */ }
{NZ}{D}*                { yylval.intval = strdup(yytext);return(NUMBER); }
"int"			{ yylval.intval = strdup(yytext);return(INT); }
"char"			{ yylval.intval = strdup(yytext);return(CHAR); }
"if"			{ return(IF); }
"else"			{ return(ELSE); }
"and"                   { return(AND); }
"not"                   { return(NOT); }
"while"                 { return WHILE;}
"return"                { return RETURN; }
"or"                    { return(OR); }
"("			{ return PAR_OPEN; }
")"			{ return PAR_CLOSE; }
";"			{ return SEMICOLON; }
"{"			{ return CB_OPEN; }
"}"			{ return CB_CLOSE; }
"+"			{ return PLUS; }
"-"			{ return MINUS; }
"*"			{ return ASTERISK; }
"/"			{ return SLASH; }
"="			{ return ASSIGNMENT; }
"<="			{ return LESS_EQUAL; }
"<"			{ return LESS; }
">="			{ return MORE_EQUAL; }
">"			{ return MORE; }
"=="			{ return EQUAL; }
"!="			{ return NOT_EQUAL; }
","                     { return COMMA;}
"'"                     {return QUOT;}

{UNDER}{L}              { yylval.charval = yytext[1];
                        return LITERAL_C ; }

{L}{A}*			{ yylval.symp = symlook(yytext);
                        return(ID); }

{WS}			{ if( *yytext == '\n' ){yylineno++;} }
.			{ yyerror("Undefiend keyword"); }


%%
int yywrap(void){
    return 1;
}

static void comment(void){
    int c;

    while ((c = input()) != 0)
        if (c == '*')
        {
            while ((c = input()) == '*')
                ;

            if (c == '/')
                return;

            if (c == 0)
                break;
        }
    yyerror("unterminated comment");
}