This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
regcomp.sym: Note specialized use of 'flags' in 2 OPs
[perl5.git] / pod / perldebguts.pod
index 2772a2f..2aa906e 100644 (file)
@@ -748,8 +748,12 @@ will be lost.
  BRANCHJ          off 1 1    BRANCH with long offset.
 
  # Special Case Regops
- IFMATCH          off 1 1    Succeeds if the following matches.
- UNLESSM          off 1 1    Fails if the following matches.
+ IFMATCH          off 1 1    Succeeds if the following matches; non-zero
+                             flags "f" means lookbehind assertion
+                             starting "f" characters before current
+ UNLESSM          off 1 1    Fails if the following matches; non-zero
+                             flags "f" means lookbehind assertion
+                             starting "f" characters before current
  SUSPEND          off 1 1    "Independent" sub-RE.
  IFTHEN           off 1 1    Switch, should be preceded by switcher.
  GROUPP           num 1      Whether the group matched.