4 # Original written by Ulrich Pfeifer on 2 Jan 1997.
5 # Greatly extended by Tom Phoenix <rootbeer@teleport.com> on 28 Jan 1997.
10 unshift @INC, '../lib';
19 print ((&{$_[0]})?"ok $test\n":"not ok $test\n");
24 sub foo { $i = shift if @_; $i }
31 # closure: lexical outside sub
32 my $foo = sub {$i = shift if @_; $i };
33 my $bar = sub {$i = shift if @_; $i };
37 # did the lexical change?
38 test { foo == 3 and $i == 3};
39 # did the second closure notice?
42 # closure: lexical inside sub
45 sub { $i = shift if @_; $i }
60 sub {$i = shift if @_; $i };
63 sub {$i = shift if @_; $i };
75 test {&$foo(11)-1 == &$bar()};
80 $foo[$_] = sub {$i = shift if @_; $i };
105 for (qw(0 1 2 3 4)) {
107 $foo[$_] = sub {$i = shift if @_; $i };
114 &{$foo[0]}() == 0 and
115 &{$foo[1]}() == 1 and
116 &{$foo[2]}() == 2 and
117 &{$foo[3]}() == 3 and
126 &{$foo[0]}() == 4 and
127 &{$foo[1]}() == 3 and
128 &{$foo[2]}() == 2 and
129 &{$foo[3]}() == 1 and
133 # test if closures get created in optimized for loops
136 for my $n ('A'..'E') {
137 $foo{$n} = sub { $n eq $_[0] };
149 $foo[$n] = sub { $n == $_[0] };
162 # no intervening reference to $n here
176 # Additional tests by Tom Phoenix <rootbeer@teleport.com>.
182 my($debugging, %expected, $inner_type, $where_declared, $within);
183 my($nc_attempt, $call_outer, $call_inner, $undef_outer);
184 my($code, $inner_sub_test, $expected, $line, $errors, $output);
185 my(@inners, $sub_test, $pid);
186 $debugging = 1 if defined($ARGV[0]) and $ARGV[0] eq '-debug';
188 # The expected values for these tests
190 'global_scalar' => 1001,
191 'global_array' => 2101,
192 'global_hash' => 3004,
196 'sub_scalar' => 7001,
202 # Our innermost sub is either named or anonymous
203 for $inner_type (qw!named anon!) {
204 # And it may be declared at filescope, within a named
205 # sub, or within an anon sub
206 for $where_declared (qw!filescope in_named in_anon!) {
207 # And that, in turn, may be within a foreach loop,
208 # a naked block, or another named sub
209 for $within (qw!foreach naked other_sub!) {
211 # Here are a number of variables which show what's
212 # going on, in a way.
213 $nc_attempt = 0+ # Named closure attempted
214 ( ($inner_type eq 'named') ||
215 ($within eq 'other_sub') ) ;
216 $call_inner = 0+ # Need to call &inner
217 ( ($inner_type eq 'anon') &&
218 ($within eq 'other_sub') ) ;
219 $call_outer = 0+ # Need to call &outer or &$outer
220 ( ($inner_type eq 'anon') &&
221 ($within ne 'other_sub') ) ;
222 $undef_outer = 0+ # $outer is created but unused
223 ( ($where_declared eq 'in_anon') &&
224 (not $call_outer) ) ;
226 $code = "# This is a test script built by t/op/closure.t\n\n";
228 $code .= <<"DEBUG_INFO" if $debugging;
229 # inner_type: $inner_type
230 # where_declared: $where_declared
232 # nc_attempt: $nc_attempt
233 # call_inner: $call_inner
234 # call_outer: $call_outer
235 # undef_outer: $undef_outer
238 $code .= <<"END_MARK_ONE";
240 BEGIN { \$SIG{__WARN__} = sub {
244 $code .= <<"END_MARK_TWO" if $nc_attempt;
245 return if index(\$msg, 'will not stay shared') != -1;
246 return if index(\$msg, 'may be unavailable') != -1;
249 $code .= <<"END_MARK_THREE"; # Backwhack a lot!
250 print "not ok: got unexpected warning \$msg\\n";
256 my \$result = &{\$_[0]};
257 print "not " unless \$result;
258 print "ok \$test\\n";
263 # some of the variables which the closure will access
264 \$global_scalar = 1000;
265 \@global_array = (2000, 2100, 2200, 2300);
266 %global_hash = 3000..3009;
268 my \$fs_scalar = 4000;
269 my \@fs_array = (5000, 5100, 5200, 5300);
270 my %fs_hash = 6000..6009;
274 if ($where_declared eq 'filescope') {
276 } elsif ($where_declared eq 'in_named') {
279 my $sub_scalar = 7000;
280 my @sub_array = (8000, 8100, 8200, 8300);
281 my %sub_hash = 9000..9009;
284 } elsif ($where_declared eq 'in_anon') {
287 my $sub_scalar = 7000;
288 my @sub_array = (8000, 8100, 8200, 8300);
289 my %sub_hash = 9000..9009;
293 die "What was $where_declared?"
296 if ($within eq 'foreach') {
298 my \$foreach = 12000;
299 my \@list = (10000, 10010);
300 foreach \$foreach (\@list) {
302 } elsif ($within eq 'naked') {
303 $code .= " { # naked block\n" # }
304 } elsif ($within eq 'other_sub') {
305 $code .= " sub inner_sub {\n" # }
307 die "What was $within?"
311 @inners = ( qw!global_scalar global_array global_hash! ,
312 qw!fs_scalar fs_array fs_hash! );
313 push @inners, 'foreach' if $within eq 'foreach';
314 if ($where_declared ne 'filescope') {
315 push @inners, qw!sub_scalar sub_array sub_hash!;
317 for $inner_sub_test (@inners) {
319 if ($inner_type eq 'named') {
320 $code .= " sub named_$sub_test "
321 } elsif ($inner_type eq 'anon') {
322 $code .= " \$anon_$sub_test = sub "
324 die "What was $inner_type?"
327 # Now to write the body of the test sub
328 if ($inner_sub_test eq 'global_scalar') {
329 $code .= '{ ++$global_scalar }'
330 } elsif ($inner_sub_test eq 'fs_scalar') {
331 $code .= '{ ++$fs_scalar }'
332 } elsif ($inner_sub_test eq 'sub_scalar') {
333 $code .= '{ ++$sub_scalar }'
334 } elsif ($inner_sub_test eq 'global_array') {
335 $code .= '{ ++$global_array[1] }'
336 } elsif ($inner_sub_test eq 'fs_array') {
337 $code .= '{ ++$fs_array[1] }'
338 } elsif ($inner_sub_test eq 'sub_array') {
339 $code .= '{ ++$sub_array[1] }'
340 } elsif ($inner_sub_test eq 'global_hash') {
341 $code .= '{ ++$global_hash{3002} }'
342 } elsif ($inner_sub_test eq 'fs_hash') {
343 $code .= '{ ++$fs_hash{6002} }'
344 } elsif ($inner_sub_test eq 'sub_hash') {
345 $code .= '{ ++$sub_hash{9002} }'
346 } elsif ($inner_sub_test eq 'foreach') {
347 $code .= '{ ++$foreach }'
349 die "What was $inner_sub_test?"
353 if ($inner_type eq 'anon') {
357 $sub_test++; # sub name sequence number
359 } # End of foreach $inner_sub_test
361 # Close up $within block # {
364 # Close up $where_declared block
365 if ($where_declared eq 'in_named') { # {
367 } elsif ($where_declared eq 'in_anon') { # {
371 # We may need to do something with the sub we just made...
372 $code .= "undef \$outer;\n" if $undef_outer;
373 $code .= "&inner_sub;\n" if $call_inner;
375 if ($where_declared eq 'in_named') {
376 $code .= "&outer;\n\n";
377 } elsif ($where_declared eq 'in_anon') {
378 $code .= "&\$outer;\n\n"
382 # Now, we can actually prep to run the tests.
383 for $inner_sub_test (@inners) {
384 $expected = $expected{$inner_sub_test} or
385 die "expected $inner_sub_test missing";
387 # Named closures won't access the expected vars
389 substr($inner_sub_test, 0, 4) eq "sub_" ) {
393 # If you make a sub within a foreach loop,
394 # what happens if it tries to access the
395 # foreach index variable? If it's a named
396 # sub, it gets the var from "outside" the loop,
397 # but if it's anon, it gets the value to which
398 # the index variable is aliased.
400 # Of course, if the value was set only
401 # within another sub which was never called,
402 # the value has not been set yet.
404 if ($inner_sub_test eq 'foreach') {
405 if ($inner_type eq 'named') {
406 if ($call_outer || ($where_declared eq 'filescope')) {
415 if ($inner_type eq 'anon') {
416 $code .= "test { &\$anon_$test == $expected };\n"
418 $code .= "test { &named_$test == $expected };\n"
423 if ($Config{d_fork} and $^O ne 'VMS' and $^O ne 'MSWin32') {
424 # Fork off a new perl to run the tests.
425 # (This is so we can catch spurious warnings.)
426 $| = 1; print ""; $| = 0; # flush output before forking
427 pipe READ, WRITE or die "Can't make pipe: $!";
428 pipe READ2, WRITE2 or die "Can't make second pipe: $!";
429 die "Can't fork: $!" unless defined($pid = open PERL, "|-");
431 # Child process here. We're going to send errors back
432 # through the extra pipe.
435 open STDOUT, ">&WRITE" or die "Can't redirect STDOUT: $!";
436 open STDERR, ">&WRITE2" or die "Can't redirect STDERR: $!";
437 exec './perl', '-w', '-'
438 or die "Can't exec ./perl: $!";
440 # Parent process here.
446 $output = join '', <READ>;
447 $errors = join '', <READ2>; }
452 # No fork(). Do it the hard way.
453 my $cmdfile = "tcmd$$"; $cmdfile++ while -e $cmdfile;
454 my $errfile = "terr$$"; $errfile++ while -e $errfile;
455 my @tmpfiles = ($cmdfile, $errfile);
456 open CMD, ">$cmdfile"; print CMD $code; close CMD;
457 my $cmd = (($^O eq 'VMS') ? "MCR $^X"
458 : ($^O eq 'MSWin32') ? '.\perl'
460 $cmd .= " -w $cmdfile 2>$errfile";
461 if ($^O eq 'VMS' or $^O eq 'MSWin32') {
462 # Use pipe instead of system so we don't inherit STD* from
463 # this process, and then foul our pipe back to parent by
464 # redirecting output in the child.
465 open PERL,"$cmd |" or die "Can't open pipe: $!\n";
466 { local $/; $output = join '', <PERL> }
469 my $outfile = "tout$$"; $outfile++ while -e $outfile;
470 push @tmpfiles, $outfile;
471 system "$cmd >$outfile";
472 { local $/; open IN, $outfile; $output = <IN>; close IN }
475 printf "not ok: exited with error code %04X\n", $?;
476 $debugging or do { 1 while unlink @tmpfiles };
479 { local $/; open IN, $errfile; $errors = <IN>; close IN }
480 1 while unlink @tmpfiles;
483 print STDERR $errors;
484 if ($debugging && ($errors || $? || ($output =~ /not ok/))) {
486 for $line (split '\n', $code) {
487 printf "%3d: %s\n", ++$lnum, $line;
490 printf "not ok: exited with error code %04X\n", $? if $?;
491 print "-" x 30, "\n" if $debugging;
493 } # End of foreach $within
494 } # End of foreach $where_declared
495 } # End of foreach $inner_type