I have 4 rules
rule1: match variable
rule2: match Float
rule3: match Integer
rule4: [ \t] ; //skipping space, tabs
rule5: \n ;
now I want to have a rule for matching error, anything else that is not ID,Float,Integer, eg:"&^()>~...."
So this is the rule I created:
. { printf("found an error:%s\n",yytext);
err_count++;
}
But there is something wrong, it catches an unknown token whenever scanner jumps to next line.
My input:
12+32+22:18,18
99558^8*6
15.~646(5
My output
Found a number:12
Found a error:+
Found a number:32
Found a error:+
Found a number:22
Found a error::
Found a number:18
Found a error:,
Found a number:18
Found a error:
Found a number:99558
Found a error:^
Found a number:8
Found a error:*
Found a number:6
Found a error:
Found a float:15.
Found a error:~
Found a number:646
Found a error:(
Found a number:5
for debug purpose, I try to find out the token by enclose it with square bracket
. {
printf("Found a error:[%s]\n",yytext);
err_count++;
}
bash show:
Found a number:12
Found a error:[+]
Found a number:32
Found a error:[+]
Found a number:22
Found a error:[:]
Found a number:18
Found a error:[,]
Found a number:18
]ound a error:[
Found a number:99558
Found a error:[^]
Found a number:8
Found a error:[*]
Found a number:6
]ound a error:[
Found a float:15.
Found a error:[~]
Found a number:646
Found a error:[(]
Found a number:5
redirect output to a txt file
Found a number:12
Found a error:[+]
Found a number:32
Found a error:[+]
Found a number:22
Found a error:[:]
Found a number:18
Found a error:[,]
Found a number:18
Found a error:[
]
Found a number:99558
Found a error:[^]
Found a number:8
Found a error:[*]
Found a number:6
Found a error:[
]
Found a float:15.
Found a error:[~]
Found a number:646
Found a error:[(]
Found a number:5
Anyone know what causing the problem ? Thanks
And I can assure you rule5: \n ; is working properly, here is the proof
I add print to rule5"\n { printf("newline\n");
redirect output to a txt file
Found a number:12
Found a error:[+]
Found a number:32
Found a error:[+]
Found a number:22
Found a error:[:]
Found a number:18
Found a error:[,]
Found a number:18
Found a error:[
]
newline
Found a number:99558
Found a error:[^]
Found a number:8
Found a error:[*]
Found a number:6
Found a error:[
]
newline
Found a float:15.
Found a error:[~]
Found a number:646
Found a error:[(]
Found a number:5
Found a error:[
]
newline
Found a variable:T189_10
Found a error:[@]
Found a float:12.2
Found a error:[
]
newline
Found a number:1
Found a variable:ABB21u
Found a error:[=]
Found a variable:ier_
Found a error:[
]
newline
Found a error:[$]
Found a error:[%]
Found a error:[^]