use Test::More tests => 5;
use PDL::LiteF;
sub tapprox {
        my($a,$b) = @_;
        my($c,$d);
        $c = abs($a-$b);
        $d = max($c);
        $d < 0.01;
}
$debug = $debug = 0;
$PDL::debug = 1;
$a = sequence(3,4);
$b = yvals(zeroes(4,3)) + sequence(4);
$c = $a->xchg(0,1)->slice(':,-1:0');
# not very useful examples but simple and test the essentials
thread_define 'tline(a(n);b(n))', over {
    $_[0] .= $_[1];
};
thread_define 'tassgn(a(n,m);[o] b())', over {
    # sumover($_[0],$_[1]);
    $_[1] .= $_[0]->sum;
};
thread_define 'ttext(a(n=3)), NOtherPars => 1', over {
    ${$_[1]} .= sprintf("%.3f %.3f %.3f,\n",$_[0]->list);
  #join(' ',$_[0]->list) . ",\n";
};
thread_define 'tprint(a(n);b(n)), NOtherPars => 1', over {
        ${$_[2]} .= "$_[1]";
};
PDL::Core::set_debugging(1) if $debug;
tline($c,$b);
note $a;
note $b;
ok(tapprox($c,$b));
$c = ones(5); # produce an error
eval('tline($a,$c)');
like $@, qr/conflicting/;
$a = ones(2,3,4)*sequence(4)->slice('*,*,:');
note $a;
tassgn($a,($b=null));
note "$b\n";
$b->dump;
ok(tapprox($b,6*sequence(4)));
# test if setting named dim with '=' raises error
# correctly at runtime
$a = sequence(4,4);
$text="";
eval('ttext($a, \$text)');
like $@, qr/conflicting/;
# test if dim=1 -> threaddim
note "testing tprint\n";
$a = sequence(3);
$b = pdl [1];
$text = "";
tprint($a, $b, \$text);
is $text, '[1 1 1]';