06-12-2015
Thanks, Aia!
So, it seems, I did understand pretty correct.
That means, my unclear, acctualy, is to the logic.
What the reason to restrict new-line (the \r,\n) on line beginning in C/C++ ?!
I am about the '^[^\r\n\{]*' in the #5 part: there is no any restriction in C/C++ ot get any number of new-line that does not brake a word!
How that could be having '<anything>;' between <func_nm>(..<params>..) and the {...} - the function body?! - that I see by #4 and beginning #5 :
- [^\{;] *?(?:^[^\r\n\{]*;?
- especially, finished by ';'?! And up to 10 times?!
That RegEx is searching a function declaration in a C/C++ source.
How those regulation could be useful in that task?
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LEARN ABOUT LINUX
re_exec
RE_COMP(3) Linux Programmer's Manual RE_COMP(3)
NAME
re_comp, re_exec - BSD regex functions
SYNOPSIS
#define _REGEX_RE_COMP
#include <sys/types.h>
#include <regex.h>
char *re_comp(char *regex);
int re_exec(char *string);
DESCRIPTION
re_comp() is used to compile the null-terminated regular expression pointed to by regex. The compiled pattern occupies a static area, the
pattern buffer, which is overwritten by subsequent use of re_comp(). If regex is NULL, no operation is performed and the pattern buffer's
contents are not altered.
re_exec() is used to assess whether the null-terminated string pointed to by string matches the previously compiled regex.
RETURN VALUE
re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer to an appropriate error message.
re_exec() returns 1 for a successful match, zero for failure.
CONFORMING TO
4.3BSD.
NOTES
These functions are obsolete; the functions documented in regcomp(3) should be used instead.
SEE ALSO
regcomp(3), regex(7), GNU regex manual
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU
1995-07-14 RE_COMP(3)