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NAME
Eval::LineNumbers - Add line numbers to heredoc blocks that contain perl
source code
SYNOPSIS
use Eval::LineNumbers qw(eval_line_numbes);
eval eval_line_numbers(<<END_HEREIS);
code
END_HEREIS
eval eval_line_numbers($caller_level, $code)
DESCRIPTION
Add a "#line "this-file" 392" comment to heredoc/hereis text that is
going to be eval'ed so that error messages will point back to the right
place.
Please note: when you embed "\n" in your code, it gets expanded in
double-quote hereis documents so it will mess up your line numbering.
Use "\\n" instead when you can.
Caller Level Example
The second form of eval_line_numbers where a caller-level is provided is
for the situation where the code is generated in one place and eval'ed
in another place. The caller level should be the number of stack levels
between where the heredoc was created and where it is eval'ed.
sub example {
return <<END_HEREIS
code
END_HEREIS
}
eval eval_line_numbers(1, example())
LICENSE
Copyright (C) 2009 David Muir Sharnoff. Copyright (C) 2013 Google, Inc.
This package may be used and redistributed under the terms of either the
Artistic 2.0 or LGPL 2.1 license.
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