B::Utils::OP(3pm) | User Contributed Perl Documentation | B::Utils::OP(3pm) |
NAME¶
B::Utils::OP - op related utility functions for perl
VERSION¶
version 0.27
SYNOPSIS¶
use B::Utils::OP qw(parent_op return_op); sub foo { my $pop = parent_op(0); my $rop = return_op(0); }
DESCRIPTION¶
sub foo { dothis(1); find_things(); return; }
has the following optree:
d <1> leavesub[1 ref] K/REFC,1 ->(end) - <@> lineseq KP ->d 1 <;> nextstate(main -371 bah.pl:8) v/2 ->2 5 <1> entersub[t2] vKS/TARG,3 ->6 - <1> ex-list K ->5 2 <0> pushmark s ->3 3 <$> const[IV 1] sM ->4 - <1> ex-rv2cv sK/3 ->- 4 <#> gv[*dothis] s ->5 6 <;> nextstate(main -371 bah.pl:9) v/2 ->7 9 <1> entersub[t4] vKS/TARG,3 ->a - <1> ex-list K ->9 7 <0> pushmark s ->8 - <1> ex-rv2cv sK/3 ->- 8 <#> gv[*find_things] s/EARLYCV ->9 a <;> nextstate(main -371 bah.pl:10) v/2 ->b c <@> return K ->d b <0> pushmark s ->c
The "find_things" in "foo" is called in the "entersub" in #9. If you call "parent_op" function with level 0, you get the "nextstate" op that is before the entersub, which is #6. And "return_op" gives you the next op that the caller is returning to, in this case, the "nextstate" in #a.
EXPORTED PERL FUNCTIONS¶
- parent_op($lv)
- In runtime, returns the B::OP object whose next is the "entersub" of the current context up level $lv
- return_op($lv)
- In runtime, returns the B::OP object that the current context is returning to at level $lv
B::CV METHODS¶
- $cv->NEW_with_start($root, $start)
- Clone the $cv but with different $root and $start
AUTHORS¶
Chia-liang Kao <clkao@clkao.org>
COPYRIGHT¶
Copyright 2008 by Chia-liang Kao
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
2022-10-19 | perl v5.36.0 |