rule.nex

/@/  { lval.fn = int(IN); return CONTAIN; }
/!@/ { lval.fn = int(NI); return CONTAIN; }
/>/  { lval.fn = int(GT); return CMP; }
/</  { lval.fn = int(LT); return CMP; }
/>=/ { lval.fn = int(GE); return CMP; }
/<=/ { lval.fn = int(LE); return CMP; }
/==/ { lval.fn = int(EQ); return CMP; }
/!=/ { lval.fn = int(NE); return CMP; }
/#/  { lval.fn = int(MA); return CMP; }
/!#/ { lval.fn = int(NM); return CMP; }
/\(/  { return LPAREN; }
/\)/  { return RPAREN; }
/,/   { return COMMA; }
/&&/  { return LAND; }
/\|\|/  { return LOR; }
/=>/  { return GET; }
/default/ { return DEFAULT; }
/len/   { lval.fn = int(LEN); return FUNC; }
/md5/   { lval.fn = int(MD5); return FUNC; }
/count/ { lval.fn = int(COUNT); return FUNC; }
/atoi/  { lval.fn = int(ATOI); return FUNC; }
/itoa/  { lval.fn = int(ITOA); return FUNC; }
/'[^']*'/ { lval.str = yylex.Text(); lval.str = lval.str[1:len(lval.str)-1]; return STR; }
/[_a-zA-Z][_a-zA-Z0-9]*/ { lval.str = yylex.Text(); return VAR; }
/-?[0-9]+(\.[0-9]*)*/ { f, _ := strconv.ParseFloat(yylex.Text(), 64); lval.dval = f; return NUM; }
/\/\/.*\n/ { }
/[ \t\n;]/ { }
/./  { fmt.Println("Lexer: invalid charactor", yylex.Text()); }
// 
package filter 
import ("fmt";"strconv")