| Standards / Extensions | C or C++ | Dependencies |
|---|---|---|
XPG4 |
both |
#include <regex.h>
void regfree(regex_t *preg);Frees any memory that was allocated by regcomp() to implement preg. The expression defined by preg is no longer a compiled regular or extended expression. (For a description of regular expressions, see Regular expressions.)
⁄* CELEBR10
This example compiles an extended regular expression and a
free regular expression.
*⁄
#include <regex.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
main() {
regex_t preg;
char *pattern = ".*(simple).*";
int rc;
if ((rc = regcomp(&preg, pattern, REG_EXTENDED)) != 0) {
printf("regcomp() failed, returning nonzero (%d)\n", rc);
exit(1);
}
regfree(&preg);
}