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main.l
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main.l
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%{
#include "y.tab.h"
int nLineas=0;
%}
operador ("="|"+"|"-"|"*"|"/"|"%"|"!"|">"|"<"|"&")
separador (","|"."|";"|"("|")"|"["|"]"|"{"|"}"|"#")
letra [a-zA-Z]
digito [0-9]
identificador {letra}({letra}|{digito})*
cadena (\"[^"]*\")
caracter (\'([^']|"\\"{letra})\')
entero {digito}+
real {digito}+("."){digito}+(("e"("-")?{digito}))?
comentario (("/""/"(.)*))
%s CODE COMMENT
%%
{BEGIN(CODE);}
<CODE>"/*" {
fprintf(yyout,"\n Ha reconocida un comentario largo que ignoraremos\n");
BEGIN(COMMENT);}
<COMMENT>. {;}
<COMMENT>\n {nLineas++;}
<COMMENT>"*/" {BEGIN(CODE);}
<CODE>{comentario} {
fprintf(yyout,"\n COMENTARIO");
return COMENTARIO;
}
<CODE>{real} {
fprintf(yyout,"\n NUM");
yylval.tipo = 2;
return NUM;
}
<CODE>{entero} {
fprintf(yyout,"\n NUM");
yylval.tipo = 1;
return NUM;
}
<CODE>{cadena} {
fprintf(yyout,"\n CADENA");
yylval.tipo = 4;
return CADENA;
}
<CODE>{caracter} {
fprintf(yyout,"\n CARACTER");
yylval.tipo = 3;
return CARACTER;
}
<CODE>true {
fprintf(yyout,"\n TRUE");
yylval.tipo = 5;
return BOOLVAL;
}
<CODE>false {
fprintf(yyout,"\n FALSE");
yylval.tipo = 5;
return BOOLVAL;
}
<CODE>[ \t] ;
<CODE>define {
fprintf(yyout,"\n DEFINE");
return DEFINE;
}
<CODE>main {
fprintf(yyout,"\n MAIN");
return MAIN;
}
<CODE>int {
fprintf(yyout,"\n INT");
yylval.tipo = 1;
return INT;
}
<CODE>float {
fprintf(yyout,"\n FLOAT");
yylval.tipo = 2;
return FLOAT;
}
<CODE>char {
fprintf(yyout,"\n CHAR");
yylval.tipo = 3;
return CHAR;
}
<CODE>string {
fprintf(yyout,"\n STRING");
yylval.tipo = 4;
return STRING;
}
<CODE>bool {
fprintf(yyout,"\n BOOLEAN");
yylval.tipo = 5;
return BOOLEAN;
}
<CODE>printf {
fprintf(yyout,"\n PRINTF");
return PRINTF;
}
<CODE>scanf {
fprintf(yyout,"\n SCANF");
return SCANF;
}
<CODE>if {
fprintf(yyout,"\n IF");
return IF;
}
<CODE>else {
fprintf(yyout,"\n ELSE");
return ELSE;
}
<CODE>switch {
fprintf(yyout,"\n SWITCH");
return SWITCH;
}
<CODE>case {
fprintf(yyout,"\n CASE");
return CASE;
}
<CODE>break {
fprintf(yyout,"\n BREAK");
return BREAK;
}
<CODE>while {
fprintf(yyout,"\n WHILE");
return WHILE;
}
<CODE>for {
fprintf(yyout,"\n FOR");
return FOR;
}
<CODE>{separador} {
fprintf(yyout,"\n%c",yytext[0]);
return yytext[0];
}
<CODE>{operador} {
fprintf(yyout,"\n%c",yytext[0]);
return yytext[0];
}
<CODE>{identificador} {
fprintf(yyout,"\n ID");
strcpy(yylval.nombre, yytext);
return ID;
}
<CODE>\n {
nLineas++;
}
<CODE>. {fprintf(yyout,"\n %c",yytext[0]);
return yytext[0];}
%%
int yywrap(){
return 1;
}