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#!./perl
#
# Verify which OP= operators warn if their targets are undefined.
# Based on redef.t, contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
# -- Robin Barker <rmb@cise.npl.co.uk>
#
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
}
use strict;
use warnings;
my $warn = "";
$SIG{q(__WARN__)} = sub { print $warn; $warn .= join("",@_) };
sub ok { print $_[1] ? "ok " : "not ok ", $_[0], "\n"; }
sub uninitialized { $warn =~ s/Use of uninitialized value[^\n]+\n//s; }
print "1..32\n";
{ my $x; $x ++; ok 1, ! uninitialized; }
{ my $x; $x --; ok 2, ! uninitialized; }
{ my $x; ++ $x; ok 3, ! uninitialized; }
{ my $x; -- $x; ok 4, ! uninitialized; }
{ my $x; $x **= 1; ok 5, uninitialized; }
{ my $x; $x += 1; ok 6, ! uninitialized; }
{ my $x; $x -= 1; ok 7, ! uninitialized; }
{ my $x; $x .= 1; ok 8, ! uninitialized; }
{ my $x; $x *= 1; ok 9, uninitialized; }
{ my $x; $x /= 1; ok 10, uninitialized; }
{ my $x; $x %= 1; ok 11, uninitialized; }
{ my $x; $x x= 1; ok 12, uninitialized; }
{ my $x; $x &= 1; ok 13, uninitialized; }
{ my $x; $x |= 1; ok 14, ! uninitialized; }
{ my $x; $x ^= 1; ok 15, ! uninitialized; }
{ my $x; $x &&= 1; ok 16, ! uninitialized; }
{ my $x; $x ||= 1; ok 17, ! uninitialized; }
{ my $x; $x <<= 1; ok 18, uninitialized; }
{ my $x; $x >>= 1; ok 19, uninitialized; }
{ my $x; $x &= "x"; ok 20, uninitialized; }
{ my $x; $x |= "x"; ok 21, ! uninitialized; }
{ my $x; $x ^= "x"; ok 22, ! uninitialized; }
{ use integer; my $x; $x += 1; ok 23, ! uninitialized; }
{ use integer; my $x; $x -= 1; ok 24, ! uninitialized; }
{ use integer; my $x; $x *= 1; ok 25, uninitialized; }
{ use integer; my $x; $x /= 1; ok 26, uninitialized; }
{ use integer; my $x; $x %= 1; ok 27, uninitialized; }
{ use integer; my $x; $x ++; ok 28, ! uninitialized; }
{ use integer; my $x; $x --; ok 29, ! uninitialized; }
{ use integer; my $x; ++ $x; ok 30, ! uninitialized; }
{ use integer; my $x; -- $x; ok 31, ! uninitialized; }
ok 32, $warn eq '';
# If we got any errors that we were not expecting, then print them
print map "#$_\n", split /\n/, $warn if length $warn;
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