diff options
Diffstat (limited to 'pod/perldebug.pod')
| -rw-r--r-- | pod/perldebug.pod | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/pod/perldebug.pod b/pod/perldebug.pod index 7d8d84f3ed..a02fd5c710 100644 --- a/pod/perldebug.pod +++ b/pod/perldebug.pod @@ -14,7 +14,8 @@ as we had thought. Debugging had to be discovered. I can remember the exact instant when I realized that a large part of my life from then on was going to be spent in finding mistakes in my own programs." ---Maurice Wilkes, 1949 + +I< --Maurice Wilkes, 1949> If you invoke Perl with the B<-d> switch, your script runs under the Perl source debugger. This works like an interactive Perl @@ -941,7 +942,7 @@ package DB, Perl sets the array @DB::args to contain the arguments the corresponding stack frame was called with. If perl is run with B<-d> option, the following additional features -are enabled: +are enabled (cf. L<perlvar/$^P>): =over @@ -1016,16 +1017,13 @@ in the package C<DB>.) =back -Note that no subroutine call is possible until C<&DB::sub> is defined -(for subroutines outside of package C<DB>). (This restriction is -recently lifted.) - -(In fact, for the standard debugger the same is true if C<$DB::deep> -(how many levels of recursion deep into the debugger you can go before -a mandatory break) is not defined.) +Note that if C<&DB::sub> needs some external data to be setup for it +to work, no subroutine call is possible until this is done. For the +standard debugger C<$DB::deep> (how many levels of recursion deep into +the debugger you can go before a mandatory break) gives an example of +such a dependency. -With the recent updates the minimal possible debugger consists of one -line +The minimal working debugger consists of one line sub DB::DB {} |