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#!/usr/bin/env perl
use warnings;
use strict;
my $PROG = 'flatlntree';
sub parsetree
{
my($name) = @_;
my($txt, $ln, @tree) = (q{}, $., $name);
while(<STDIN>){
if(/^BEGNODE (\S+)$/){
push @tree, $txt if($txt);
push @tree, parsetree($1);
$txt = q{};
}elsif(/^ENDNODE (\S+)$/){
if($1 ne $name){
print STDERR "$PROG: wrong ENDNODE:"
. qq{ '$1' at line $.}
. qq{ (in '$name' started at line $ln)\n};
exit 101;
}else{
last;
}
}else{
$txt .= $_;
}
}
push @tree, $txt if($txt);
return \@tree;
}
sub flatten
{
my($tree) = @_;
if(ref $tree){
# skip name
return join q{}, map { flatten($tree->[$_]) } 1 .. $#$tree;
}else{
return $tree;
}
}
sub main
{
my $top = parsetree('TOP');
@$top = grep { ref } @$top; # only keep sub-nodes
for my $n (@$top){
my $name = $n->[0];
print ">>> $name\n";
print flatten($n);
}
return 0;
}
exit main();
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