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.\" ========================================================================
.\"
.IX Title "Devel::StackTrace::WithLexicals 3pm"
.TH Devel::StackTrace::WithLexicals 3pm "2022-10-14" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Devel::StackTrace::WithLexicals \- Devel::StackTrace + PadWalker
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Devel::StackTrace::WithLexicals;
\&
\&    sub process_user {
\&        my $item_count = 20;
\&        price_items();
\&        print "$item_count\en";    # prints 21
\&    }
\&
\&    sub price_items {
\&        my $trace = Devel::StackTrace::WithLexicals\->new(
\&            unsafe_ref_capture => 1    # warning: can cause memory leak
\&        );
\&        while ( my $frame = $trace\->next_frame() ) {
\&            my $item_count_ref = $frame\->lexical(\*(Aq$item_count\*(Aq);
\&            ${$item_count_ref}++ if ref $item_count_ref eq \*(AqSCALAR\*(Aq;
\&        }
\&    }
\&
\&    process_user();
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Devel::StackTrace is pretty good at generating stack traces.
.PP
PadWalker is pretty good at the inspection and modification of your callers'
lexical variables.
.PP
Devel::StackTrace::WithLexicals is pretty good at generating stack traces
with all your callers' lexical variables.
.SH "METHODS"
.IX Header "METHODS"
All the same as Devel::StackTrace, except that frames (in class
Devel::StackTrace::WithLexicals::Frame) also have a \f(CW\*(C`lexicals\*(C'\fR method. This
returns the same hashref as returned by PadWalker.
.PP
Unless the \f(CW\*(C`unsafe_ref_capture\*(C'\fR option to Devel::StackTrace is
used, then each reference is stringified. This can be useful to avoid
leaking memory.
.PP
Simple, really.
.SH "AUTHOR"
.IX Header "AUTHOR"
Shawn M Moore, \f(CW\*(C`sartak@gmail.com\*(C'\fR
.SH "BUGS"
.IX Header "BUGS"
I had to copy and paste some code from Devel::StackTrace to achieve this
(it's hard to subclass). There may be bugs lingering here.
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright 2008\-2009 Shawn M Moore.
.PP
Some portions written by Dave Rolsky, they belong to him.
.PP
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.