The minimum string length (in characters) required for the pattern to match. This is used to prune the search space by not bothering to match any closer to the end of a string than would allow a match. For instance there is no point in even starting the regex engine if the minlen is...
With all of the regexps above, if the regexp matched anywhere in the string, it was considered a match. Sometimes, however, we'd like to specifywherein the string the regexp should try to match. To do this, we would use theanchormetacharacters'^'and'$'. The anchor'^'means match at...
# If the pattern is actually the null string, Perl uses the most recently # executed (and successfully compiled) regex is used instead. This is a # nasty trap for the unwary! The PCRE2 test suite does contain null strings # in places - if they are allowed through here all sorts ...
Since $string uses programmer instead of hacker, the test fails. The output shows me the string, what I expected, and the regex it tried to use: not ok 1 - Some sort of hacker! 1..1 # Failed test 'Some sort of hacker!' # 'Just another Perl programmer,' # doesn't match '(?-...
+ ") does not contain regular expression [" + pattern + "]."); } 代码示例来源:origin: org.apache.hivemind/com.springsource.org.apache.hivemind protected void assertRegexp(String pattern, String actual) throws Exception { setupMatcher(); Pattern compiled = _compiler.compile(pattern); if (_...
protected void assertRegexp(String pattern, String actual) throws Exception { setupMatcher(); Pattern compiled = _compiler.compile(pattern); if (_matcher.contains(actual, compiled)) return; throw new AssertionFailedError("\"" + actual + "\" does not contain regular expression[" + pattern + "...
{ my $i_wd = shift; my $word = shift; my $regex = shift; my $has = 0; if ( $word =~ /($regex)/ ) { $has++ if $1; } debug("word: $i_wd ".($has ? 'matches' : 'does not match')." chars: /$regex/"); return $has; } sub report { my %report = @_; my ...
Fall-through You can use the "continue" keyword to fall through from one case to the next: given($foo) { when (/x/) { say '$foo contains an x'; continue } when (/y/) { say '$foo contains a y' } default { say '$foo does not contain a y' } } Switching in a loop ...
#include <pcre2posix.h> int regcomp(regex_t *preg, const char *pattern, int cflags); int regexec(const regex_t *preg, const char *string, size_t nmatch, regmatch_t pmatch[], int eflags); size_t regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size); ...
A common example is a pattern with nested unlimited repeats applied to a long string that does not match. When one of these limits is reached, pcre2_match() gives an error return. The limits can also be set by items at the start of the pattern of the form (*LIMIT_HEAP=d) (*LIMIT...