.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" B::Utils::OP \- op related utility functions for perl .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 5 \& use B::Utils::OP qw(parent_op return_op); \& sub foo { \& my $pop = parent_op(0); \& my $rop = return_op(0); \& } .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" .Vb 5 \& sub foo { \& dothis(1); \& find_things(); \& return; \& } .Ve .PP has the following optree: .PP .Vb 10 \& d <1> leavesub[1 ref] K/REFC,1 \->(end) \& \- <@> lineseq KP \->d \& 1 <;> nextstate(main \-371 bah.pl:8) v/2 \->2 \& 5 <1> entersub[t2] vKS/TARG,3 \->6 \& \- <1> ex\-list K \->5 \& 2 <0> pushmark s \->3 \& 3 <$> 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 .Ve .PP The \f(CW\*(C`find_things\*(C'\fR in \f(CW\*(C`foo\*(C'\fR is called in the \f(CW\*(C`entersub\*(C'\fR in #9. If you call \f(CW\*(C`parent_op\*(C'\fR function with level 0, you get the \f(CW\*(C`nextstate\*(C'\fR op that is before the entersub, which is #6. And \f(CW\*(C`return_op\*(C'\fR gives you the next op that the caller is returning to, in this case, the \&\f(CW\*(C`nextstate\*(C'\fR in #a. .SS "\s-1EXPORTED\s0 \s-1PERL\s0 \s-1FUNCTIONS\s0" .IX Subsection "EXPORTED PERL FUNCTIONS" .IP "parent_op($lv)" 4 .IX Item "parent_op($lv)" In runtime, returns the B::OP object whose next is the \f(CW\*(C`entersub\*(C'\fR of the current context up level \f(CW$lv\fR .IP "return_op($lv)" 4 .IX Item "return_op($lv)" In runtime, returns the B::OP object that the current context is returning to at level \f(CW$lv\fR .SS "B::CV \s-1METHODS\s0" .IX Subsection "B::CV METHODS" .ie n .IP "$cv\->NEW_with_start($root, $start)" 4 .el .IP "\f(CW$cv\fR\->NEW_with_start($root, \f(CW$start\fR)" 4 .IX Item "$cv->NEW_with_start($root, $start)" Clone the \f(CW$cv\fR but with different \f(CW$root\fR and \f(CW$start\fR .SH "AUTHORS" .IX Header "AUTHORS" Chia-liang Kao .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2008 by Chia-liang Kao .PP This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. .PP See