<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">use strict;
use warnings;

package Test::Deep::Code;

use Test::Deep::Cmp;

sub init
{
  my $self = shift;

  my $code = shift || die "No coderef supplied";

  $self-&gt;{code} = $code;
}

sub descend
{
  my $self = shift;
  my $got = shift;

  my ($ok, $diag) = &amp;{$self-&gt;{code}}($got);

  $self-&gt;data-&gt;{diag} = $diag;

  return $ok;
}

sub diagnostics
{
  my $self = shift;
  my ($where, $last) = @_;

  my $error = $last-&gt;{diag};
  my $data = Test::Deep::render_val($last-&gt;{got});
  my $diag = &lt;&lt;EOM;
Ran coderef at $where on

$data
EOM
  if (defined($error))
  {
    $diag .= &lt;&lt;EOM;
and it said
$error
EOM
  }
  else
  {
    $diag .= &lt;&lt;EOM;
it failed but it didn't say why.
EOM
  }

  return $diag;
}

1;
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