BEGIN {

if ($ENV{PERL_CORE}) {

chdir('t') if -d 't';

@INC = qw(../lib);

}

}

# Before `make install' is performed this script should be runnable with

# `make test'. After `make install' it should work as `perl test.pl'

######################### We start with some black magic to print on failure.

# Change 1..1 below to 1..last_test_to_print .

# (It may become useful if the test is moved to ./t subdirectory.)

BEGIN { $| = 1; print "1..19\n"; }

END {print "not ok 1\n" unless $loaded;}

use Text::Balanced qw ( extract_bracketed );

$loaded = 1;

print "ok 1\n";

$count=2;

use vars qw( $DEBUG );

sub debug { print "\t>>>",@_ if $DEBUG }

######################### End of black magic.

$cmd = "print";

$neg = 0;

while (defined($str = <DATA>))

{

chomp $str;

if ($str =~ s/\A# USING://) { $neg = 0; $cmd = $str; next; }

elsif ($str =~ /\A# TH[EI]SE? SHOULD FAIL/) { $neg = 1; next; }

elsif (!$str || $str =~ /\A#/) { $neg = 0; next }

$str =~ s/\\n/\n/g;

debug "\tUsing: $cmd\n";

debug "\t on: [$str]\n";

$var = eval "() = $cmd";

debug "\t list got: [$var]\n";

debug "\t list left: [$str]\n";

print "not " if (substr($str,pos($str),1) eq ';')==$neg;

print "ok ", $count++;

print " ($@)" if $@ && $DEBUG;

print "\n";

pos $str = 0;

$var = eval $cmd;

$var = "<undef>" unless defined $var;

debug "\t scalar got: [$var]\n";

debug "\t scalar left: [$str]\n";

print "not " if ($str =~ '\A;')==$neg;

print "ok ", $count++;

print " ($@)" if $@ && $DEBUG;

print "\n";

}

__DATA__

# USING: extract_bracketed($str);

{a nested { and } are okay as are () and <> pairs and escaped \}'s };

{a nested\n{ and } are okay as are\n() and <> pairs and escaped \}'s };

# USING: extract_bracketed($str,'{}');

{a nested { and } are okay as are unbalanced ( and < pairs and escaped \}'s };

# THESE SHOULD FAIL

{an unmatched nested { isn't okay, nor are ( and < };

{an unbalanced nested [ even with } and ] to match them;

# USING: extract_bracketed($str,'<"`q>');

<a q{uoted} ">" unbalanced right bracket of /(q>)/ either sort (`>>>""">>>>`) is okay >;

# USING: extract_bracketed($str,'<">');

<a quoted ">" unbalanced right bracket is okay >;

# USING: extract_bracketed($str,'<"`>');

<a quoted ">" unbalanced right bracket of either sort (`>>>""">>>>`) is okay >;

# THIS SHOULD FAIL

<a misquoted '>' unbalanced right bracket is bad >;