#!/usr/bin/perl
# Marpa::R3 is Copyright (C) 2016, Jeffrey Kegler.
#
# This module is free software; you can redistribute it and/or modify it
# under the same terms as Perl 5.10.1. For more details, see the full text
# of the licenses in the directory LICENSES.
#
# This program is distributed in the hope that it will be
# useful, but it is provided “as is” and without any express
# or implied warranties. For details, see the full text of
# of the licenses in the directory LICENSES.
use 5.010001;
use Pod::Simple::SimpleTree;
use Data::Dumper;
my $filename = shift;
my $tree = Pod::Simple::SimpleTree->new->parse_file($filename)->root;
my %headers = ();
sub find_header {
my ($subtree) = @_;
if (ref $subtree eq 'ARRAY') {
if (substr($subtree->[0], 0, 4) eq 'head') {
$headers{$subtree->[2]} = 1;
# say $subtree->[2];
}
if ($subtree->[0] eq 'L') {
my $hash = $subtree->[1];
return if not $hash->{type} eq 'pod';
return if exists $hash->{to};
return if not exists $hash->{section};
push @section_ref, $hash->{section};
}
find_header($_) for @{$subtree};
}
return;
}
# say Dumper($tree);
find_header($tree);
for my $section_ref (@section_ref) {
if (not exists $headers{$section_ref})
{
say STDERR "Unresolved internal section reference: $section_ref"
}
}