Hi,
I have requirement to consider following as valid comment in source
language
|abc#
Some description ...
#abc|
And following is invalid comment
|abc#
Some description ...
#xyz|
And for above requirement I need to capture token string and performed match
operation as there is no inbuilt support for backward reference in ragel
I tried out with following implementation
action mark_start{
start = fpc+1;
// printf(" Mark start at %c\n",fc);
}
action tagstart{
size_t len = fpc - start ;
s = calloc(len,sizeof(char));
strncpy(s,start,len);
s[len]='\0';
// printf("Start : %s\n",s);
}
action tagend{
size_t len = fpc - start ;
e = calloc(len,sizeof(char));
strncpy(e,start,len);
e[len]='\0';
stringcmp = strncmp(e,s,sizeof(s));
//printf("End : %s\n",e);
}
curl_tag_comment =
'|'@mark_start (nonnewline - ws)* '#'@tagstart @comment(
newline %{ entity = INTERNAL_NL; } %curl_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> ('#'@mark_start (nonnewline - ws)* '|' @tagend when { stringcmp
== 0}) @comment;
Now I am able to capture both start and end substring properly and able to
do math operation in when condition but it produces as a valid commet in
parser for even a non valid statement.
Like
curl comment |abc#
curl comment Some description ...
curl comment #xyz|
Please provide me any suggestions where I am doing something wrong or is
there any other better way to implement the same.
Thanks & Regards
Hardik Parikh
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