Sub-Uplevel-0.24/0000755000175000017500000000000011720606431012542 5ustar daviddavidSub-Uplevel-0.24/examples/0000755000175000017500000000000011720606431014360 5ustar daviddavidSub-Uplevel-0.24/examples/uplevel-demo.pl0000644000175000017500000000103211720606431017307 0ustar daviddaviduse strict; use warnings; use Sub::Uplevel; # subroutine A calls subroutine B with uplevel(), so when # subroutine B queries caller(), it gets main as the caller (just # like subroutine A) instead of getting subroutine A sub sub_a { print "Entering Subroutine A\n"; print "caller() says: ", join( ", ", (caller())[0 .. 2] ), "\n"; print "Calling B with uplevel\n"; uplevel 1, \&sub_b; } sub sub_b { print "Entering Subroutine B\n"; print "caller() says: ", join( ", ", (caller())[0 .. 2] ), "\n"; } sub_a(); Sub-Uplevel-0.24/xt/0000755000175000017500000000000011720606431013175 5ustar daviddavidSub-Uplevel-0.24/xt/release/0000755000175000017500000000000011720606431014615 5ustar daviddavidSub-Uplevel-0.24/xt/release/test-version.t0000644000175000017500000000023211720606431017441 0ustar daviddavid#!/usr/bin/perl use 5.006; use strict; use warnings; use Test::More; use Test::Requires { 'Test::Version' => 0.04, }; version_all_ok; done_testing; Sub-Uplevel-0.24/xt/release/pod-coverage.t0000644000175000017500000000052711720606431017361 0ustar daviddavid#!perl use Test::More; eval "use Test::Pod::Coverage 1.08"; plan skip_all => "Test::Pod::Coverage 1.08 required for testing POD coverage" if $@; eval "use Pod::Coverage::TrustPod"; plan skip_all => "Pod::Coverage::TrustPod required for testing POD coverage" if $@; all_pod_coverage_ok({ coverage_class => 'Pod::Coverage::TrustPod' }); Sub-Uplevel-0.24/xt/release/portability.t0000644000175000017500000000024311720606431017343 0ustar daviddavid#!perl use Test::More; eval 'use Test::Portability::Files'; plan skip_all => 'Test::Portability::Files required for testing portability' if $@; run_tests(); Sub-Uplevel-0.24/xt/release/pod-syntax.t0000644000175000017500000000021211720606431017103 0ustar daviddavid#!perl use Test::More; eval "use Test::Pod 1.41"; plan skip_all => "Test::Pod 1.41 required for testing POD" if $@; all_pod_files_ok(); Sub-Uplevel-0.24/xt/release/distmeta.t0000644000175000017500000000021711720606431016614 0ustar daviddavid#!perl use Test::More; eval "use Test::CPAN::Meta"; plan skip_all => "Test::CPAN::Meta required for testing META.yml" if $@; meta_yaml_ok(); Sub-Uplevel-0.24/xt/author/0000755000175000017500000000000011720606431014477 5ustar daviddavidSub-Uplevel-0.24/xt/author/pod-spell.t0000644000175000017500000000072411720606431016566 0ustar daviddavid#!perl # This test is generated by Dist::Zilla::Plugin::Test::PodSpelling use Test::More; eval "use Pod::Wordlist::hanekomu"; plan skip_all => "Pod::Wordlist::hanekomu required for testing POD spelling" if $@; eval "use Test::Spelling 0.12"; plan skip_all => "Test::Spelling 0.12 required for testing POD spelling" if $@; add_stopwords(); all_pod_files_spelling_ok('bin', 'lib'); __DATA__ PadWalker Tcl's Welch uplevel Michael Schwern David Golden and Sub-Uplevel-0.24/xt/author/critic.t0000644000175000017500000000043511720606431016143 0ustar daviddavid#!perl use strict; use warnings; use Test::More; use English qw(-no_match_vars); eval "use Test::Perl::Critic"; plan skip_all => 'Test::Perl::Critic required to criticise code' if $@; Test::Perl::Critic->import( -profile => "perlcritic.rc" ) if -e "perlcritic.rc"; all_critic_ok(); Sub-Uplevel-0.24/lib/0000755000175000017500000000000011720606431013310 5ustar daviddavidSub-Uplevel-0.24/lib/Sub/0000755000175000017500000000000011720606431014041 5ustar daviddavidSub-Uplevel-0.24/lib/Sub/Uplevel.pm0000644000175000017500000002552011720606431016017 0ustar daviddavidpackage Sub::Uplevel; use 5.006; use strict; # ABSTRACT: apparently run a function in a higher stack frame our $VERSION = '0.24'; # VERSION # Frame check global constant our $CHECK_FRAMES; BEGIN { $CHECK_FRAMES = !! $CHECK_FRAMES; } use constant CHECK_FRAMES => $CHECK_FRAMES; # We must override *CORE::GLOBAL::caller if it hasn't already been # overridden or else Perl won't see our local override later. if ( not defined *CORE::GLOBAL::caller{CODE} ) { *CORE::GLOBAL::caller = \&_normal_caller; } # modules to force reload if ":aggressive" is specified my @reload_list = qw/Exporter Exporter::Heavy/; sub import { no strict 'refs'; ## no critic my ($class, @args) = @_; for my $tag ( @args, 'uplevel' ) { if ( $tag eq 'uplevel' ) { my $caller = caller(0); *{"$caller\::uplevel"} = \&uplevel; } elsif( $tag eq ':aggressive' ) { _force_reload( @reload_list ); } else { die qq{"$tag" is not exported by the $class module\n} } } return; } sub _force_reload { no warnings 'redefine'; local $^W = 0; for my $m ( @_ ) { $m =~ s{::}{/}g; $m .= ".pm"; require $m if delete $INC{$m}; } } # @Up_Frames -- uplevel stack # $Caller_Proxy -- whatever caller() override was in effect before uplevel our (@Up_Frames, $Caller_Proxy); sub _apparent_stack_height { my $height = 1; # start above this function while ( 1 ) { last if ! defined scalar $Caller_Proxy->($height); $height++; } return $height - 1; # subtract 1 for this function } sub uplevel { # Backwards compatible version of "no warnings 'redefine'" my $old_W = $^W; $^W = 0; # Update the caller proxy if the uplevel override isn't in effect local $Caller_Proxy = *CORE::GLOBAL::caller{CODE} if *CORE::GLOBAL::caller{CODE} != \&_uplevel_caller; local *CORE::GLOBAL::caller = \&_uplevel_caller; # Restore old warnings state $^W = $old_W; if ( CHECK_FRAMES and $_[0] >= _apparent_stack_height() ) { require Carp; Carp::carp("uplevel $_[0] is more than the caller stack"); } local @Up_Frames = (shift, @Up_Frames ); my $function = shift; return $function->(@_); } sub _normal_caller (;$) { ## no critic Prototypes my ($height) = @_; $height++; my @caller = CORE::caller($height); if ( CORE::caller() eq 'DB' ) { # Oops, redo picking up @DB::args package DB; @caller = CORE::caller($height); } return if ! @caller; # empty return $caller[0] if ! wantarray; # scalar context return @_ ? @caller : @caller[0..2]; # extra info or regular } sub _uplevel_caller (;$) { ## no critic Prototypes my $height = $_[0] || 0; # shortcut if no uplevels have been called # always add +1 to CORE::caller (proxy caller function) # to skip this function's caller return $Caller_Proxy->( $height + 1 ) if ! @Up_Frames; my $saw_uplevel = 0; my $adjust = 0; # walk up the call stack to fight the right package level to return; # look one higher than requested for each call to uplevel found # and adjust by the amount found in the Up_Frames stack for that call. # We *must* use CORE::caller here since we need the real stack not what # some other override says the stack looks like, just in case that other # override breaks things in some horrible way for ( my $up = 0; $up <= $height + $adjust; $up++ ) { my @caller = CORE::caller($up + 1); if( defined $caller[0] && $caller[0] eq __PACKAGE__ ) { # add one for each uplevel call seen # and look into the uplevel stack for the offset $adjust += 1 + $Up_Frames[$saw_uplevel]; $saw_uplevel++; } } # For returning values, we pass through the call to the proxy caller # function, just at a higher stack level my @caller = $Caller_Proxy->($height + $adjust + 1); if ( CORE::caller() eq 'DB' ) { # Oops, redo picking up @DB::args package DB; @caller = $Sub::Uplevel::Caller_Proxy->($height + $adjust + 1); } return if ! @caller; # empty return $caller[0] if ! wantarray; # scalar context return @_ ? @caller : @caller[0..2]; # extra info or regular } 1; __END__ =pod =head1 NAME Sub::Uplevel - apparently run a function in a higher stack frame =head1 VERSION version 0.24 =head1 SYNOPSIS use Sub::Uplevel; sub foo { print join " - ", caller; } sub bar { uplevel 1, \&foo; } #line 11 bar(); # main - foo.plx - 11 =head1 DESCRIPTION Like Tcl's uplevel() function, but not quite so dangerous. The idea is just to fool caller(). All the really naughty bits of Tcl's uplevel() are avoided. B =over 4 =item B uplevel $num_frames, \&func, @args; Makes the given function think it's being executed $num_frames higher than the current stack level. So when they use caller($frames) it will actually give caller($frames + $num_frames) for them. C is effectively C but you don't immediately exit the current subroutine. So while you can't do this: sub wrapper { print "Before\n"; goto &some_func; print "After\n"; } you can do this: sub wrapper { print "Before\n"; my @out = uplevel 1, &some_func; print "After\n"; return @out; } C has the ability to issue a warning if C<$num_frames> is more than the current call stack depth, although this warning is disabled and compiled out by default as the check is relatively expensive. To enable the check for debugging or testing, you should set the global C<$Sub::Uplevel::CHECK_FRAMES> to true before loading Sub::Uplevel for the first time as follows: #!/usr/bin/perl BEGIN { $Sub::Uplevel::CHECK_FRAMES = 1; } use Sub::Uplevel; Setting or changing the global after the module has been loaded will have no effect. =begin _private So it has to work like this: Call stack Actual uplevel 1 CORE::GLOBAL::caller Carp::short_error_loc 0 Carp::shortmess_heavy 1 0 Carp::croak 2 1 try_croak 3 2 uplevel 4 function_that_called_uplevel 5 caller_we_want_to_see 6 3 its_caller 7 4 So when caller(X) winds up below uplevel(), it only has to use CORE::caller(X+1) (to skip CORE::GLOBAL::caller). But when caller(X) winds up no or above uplevel(), it's CORE::caller(X+1+uplevel+1). Which means I'm probably going to have to do something nasty like walk up the call stack on each caller() to see if I'm going to wind up before or after Sub::Uplevel::uplevel(). =end _private =begin _dagolden I found the description above a bit confusing. Instead, this is the logic that I found clearer when CORE::GLOBAL::caller is invoked and we have to walk up the call stack: * if searching up to the requested height in the real call stack doesn't find a call to uplevel, then we can return the result at that height in the call stack * if we find a call to uplevel, we need to keep searching upwards beyond the requested height at least by the amount of upleveling requested for that call to uplevel (from the Up_Frames stack set during the uplevel call) * additionally, we need to hide the uplevel subroutine call, too, so we search upwards one more level for each call to uplevel * when we've reached the top of the search, we want to return that frame in the call stack, i.e. the requested height plus any uplevel adjustments found during the search =end _dagolden =back =head1 EXAMPLE The main reason I wrote this module is so I could write wrappers around functions and they wouldn't be aware they've been wrapped. use Sub::Uplevel; my $original_foo = \&foo; *foo = sub { my @output = uplevel 1, $original_foo; print "foo() returned: @output"; return @output; }; If this code frightens you B =head1 BUGS and CAVEATS Well, the bad news is uplevel() is about 5 times slower than a normal function call. XS implementation anyone? It also slows down every invocation of caller(), regardless of whether uplevel() is in effect. Sub::Uplevel overrides CORE::GLOBAL::caller temporarily for the scope of each uplevel call. It does its best to work with any previously existing CORE::GLOBAL::caller (both when Sub::Uplevel is first loaded and within each uplevel call) such as from Contextual::Return or Hook::LexWrap. However, if you are routinely using multiple modules that override CORE::GLOBAL::caller, you are probably asking for trouble. You B load Sub::Uplevel as early as possible within your program. As with all CORE::GLOBAL overloading, the overload will not affect modules that have already been compiled prior to the overload. One module that often is unavoidably loaded prior to Sub::Uplevel is Exporter. To forcibly recompile Exporter (and Exporter::Heavy) after loading Sub::Uplevel, use it with the ":aggressive" tag: use Sub::Uplevel qw/:aggressive/; The private function C may be passed a list of additional modules to reload if ":aggressive" is not aggressive enough. Reloading modules may break things, so only use this as a last resort. As of version 0.20, Sub::Uplevel requires Perl 5.6 or greater. =head1 HISTORY Those who do not learn from HISTORY are doomed to repeat it. The lesson here is simple: Don't sit next to a Tcl programmer at the dinner table. =head1 THANKS Thanks to Brent Welch, Damian Conway and Robin Houston. See http://www.perl.com/perl/misc/Artistic.html =head1 SEE ALSO PadWalker (for the similar idea with lexicals), Hook::LexWrap, Tcl's uplevel() at http://www.scriptics.com/man/tcl8.4/TclCmd/uplevel.htm =for :stopwords cpan testmatrix url annocpan anno bugtracker rt cpants kwalitee diff irc mailto metadata placeholders =head1 SUPPORT =head2 Bugs / Feature Requests Please report any bugs or feature requests through the issue tracker at L. You will be notified automatically of any progress on your issue. =head2 Source Code This is open source software. The code repository is available for public review and contribution under the terms of the license. L git clone https://github.com/dagolden/sub-uplevel.git =head1 AUTHORS =over 4 =item * Michael Schwern =item * David Golden =back =head1 COPYRIGHT AND LICENSE This software is copyright (c) 2012 by Michael Schwern and David Golden. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =cut Sub-Uplevel-0.24/README.PATCHING0000644000175000017500000000261611720606431014623 0ustar daviddavidREADME.PATCHING Thank you for considering contributing to this distribution. This file contains instructions that will help you work with the source code. The distribution is managed with Dist::Zilla. This means than many of the usual files you might expect are not in the repository, but are generated at release time (e.g. Makefile.PL). However, you can run tests directly using the 'prove' tool: $ prove -l $ prove -lv t/some_test_file.t For most distributions, 'prove' is entirely sufficent for you to test any patches you have. Likewise, much of the documentation Pod is generated at release time. Depending on the distribution, some documentation may be written in a Pod dialect called WikiDoc. (See Pod::WikiDoc on CPAN.) If you would like to submit a documentation edit, please limit yourself to the documentation you see. If you see typos or documentation issues in the generated docs, please email or open a bug ticket instead of patching. Dist::Zilla is a very powerful authoring tool, but requires a number of author-specific plugins. If you would like to use it for contributing, install it from CPAN, then run one of the following commands, depending on your CPAN client: $ cpan `dzil authordeps` $ dzil authordeps | cpanm Once installed, here are some dzil commands you might try: $ dzil build $ dzil test $ dzil xtest You can learn more about Dist::Zilla at http://dzil.org/ Sub-Uplevel-0.24/perlcritic.rc0000644000175000017500000000100711720606431015226 0ustar daviddavidseverity = 5 verbose = 8 [Variables::ProhibitPunctuationVars] allow = $@ $! # Turn these off [-BuiltinFunctions::ProhibitStringyEval] [-ControlStructures::ProhibitPostfixControls] [-ControlStructures::ProhibitUnlessBlocks] [-Documentation::RequirePodSections] [-InputOutput::ProhibitInteractiveTest] [-Miscellanea::RequireRcsKeywords] [-References::ProhibitDoubleSigils] [-RegularExpressions::RequireExtendedFormatting] [-InputOutput::ProhibitTwoArgOpen] # Turn this on [Lax::ProhibitStringyEval::ExceptForRequire] Sub-Uplevel-0.24/t/0000755000175000017500000000000011720606431013005 5ustar daviddavidSub-Uplevel-0.24/t/05_honor_prior_override.t0000644000175000017500000000512111720606431017734 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More tests => 10; # Goal of these tests: confirm that Sub::Uplevel will honor (use) a # CORE::GLOBAL::caller override that occurs prior to Sub::Uplevel loading #--------------------------------------------------------------------------# # define a custom caller function that increments a counter #--------------------------------------------------------------------------# my $caller_counter = 0; sub _count_caller(;$) { $caller_counter++; my $height = $_[0]; my @caller = CORE::caller(++$height); if( wantarray and !@_ ) { return @caller[0..2]; } elsif (wantarray) { return @caller; } else { return $caller[0]; } } #--------------------------------------------------------------------------# # redefine CORE::GLOBAL::caller then load Sub::Uplevel #--------------------------------------------------------------------------# BEGIN { ok( ! defined *CORE::GLOBAL::caller{CODE}, "no global override yet" ); { # old style no warnings 'redefine' my $old_W = $^W; $^W = 0; *CORE::GLOBAL::caller = \&_count_caller; $^W = $old_W; } is( *CORE::GLOBAL::caller{CODE}, \&_count_caller, "added custom caller override" ); use_ok('Sub::Uplevel'); is( *CORE::GLOBAL::caller{CODE}, \&_count_caller, "custom caller override still in place" ); } #--------------------------------------------------------------------------# # define subs *after* caller has been redefined in BEGIN #--------------------------------------------------------------------------# sub test_caller { return scalar caller } sub uplevel_caller { return uplevel 1, \&test_caller } sub test_caller_w_uplevel { return uplevel_caller } #--------------------------------------------------------------------------# # Test for reversed package name both inside and outside an uplevel call #--------------------------------------------------------------------------# my $old_caller_counter; $old_caller_counter = $caller_counter; is( scalar caller(), undef, "caller from main package is undef" ); ok( $caller_counter > $old_caller_counter, "custom caller() was used" ); $old_caller_counter = $caller_counter; is( test_caller(), "main", "caller from subroutine is main" ); ok( $caller_counter > $old_caller_counter, "custom caller() was used" ); $old_caller_counter = $caller_counter; is( test_caller_w_uplevel(), "main", "caller from uplevel subroutine is main" ); ok( $caller_counter > $old_caller_counter, "custom caller() was used" ); Sub-Uplevel-0.24/t/04_honor_later_override.t0000644000175000017500000000443611720606431017717 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More tests => 7; # Goal of these tests: confirm that Sub::Uplevel will honor (use) a # CORE::GLOBAL::caller that occurs after Sub::Uplevel is loaded #--------------------------------------------------------------------------# # define a custom caller function that reverses the package name #--------------------------------------------------------------------------# sub _reverse_caller(;$) { my $height = $_[0]; my @caller = CORE::caller(++$height); $caller[0] = defined $caller[0] ? reverse $caller[0] : undef; if( wantarray and !@_ ) { return @caller[0..2]; } elsif (wantarray) { return @caller; } else { return $caller[0]; } } #--------------------------------------------------------------------------# # load Sub::Uplevel then redefine CORE::GLOBAL::caller #--------------------------------------------------------------------------# BEGIN { ok( ! defined *CORE::GLOBAL::caller{CODE}, "no global override yet" ); use_ok('Sub::Uplevel'); is( *CORE::GLOBAL::caller{CODE}, \&Sub::Uplevel::_normal_caller, "Sub::Uplevel's normal caller override in place" ); # old style no warnings 'redefine' my $old_W = $^W; $^W = 0; *CORE::GLOBAL::caller = \&_reverse_caller; $^W = $old_W } is( *CORE::GLOBAL::caller{CODE}, \&_reverse_caller, "added new, custom caller override" ); #--------------------------------------------------------------------------# # define subs *after* caller has been redefined in BEGIN #--------------------------------------------------------------------------# sub test_caller { return scalar caller } sub uplevel_caller { return uplevel 1, \&test_caller } sub test_caller_w_uplevel { return uplevel_caller } #--------------------------------------------------------------------------# # Test for reversed package name both inside and outside an uplevel call #--------------------------------------------------------------------------# is( scalar caller(), undef, "caller from main package is undef" ); is( test_caller(), reverse("main"), "caller from subroutine calls custom routine" ); is( test_caller_w_uplevel(), reverse("main"), "caller from uplevel subroutine calls custom routine" ); Sub-Uplevel-0.24/t/07_uplevel_too_high.t0000644000175000017500000000132011720606431017030 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More tests => 5; BEGIN { $Sub::Uplevel::CHECK_FRAMES = 1; use_ok('Sub::Uplevel'); } sub show_caller { return scalar caller; } sub wrap_show_caller { my $uplevel = shift; return uplevel $uplevel, \&show_caller; } my $warning = ''; local $SIG{__WARN__} = sub { $warning = shift }; my $caller = wrap_show_caller(1); is($caller, 'main', "wrapper returned correct caller"); is( $warning, '', "don't warn if ordinary uplevel" ); $warning = ''; $caller = wrap_show_caller(2); my $file = __FILE__; is($caller, undef, "wrapper returned correct caller"); like( $warning, qr/uplevel 2 is more than the caller stack/, "warn if too much uplevel" ); Sub-Uplevel-0.24/t/03_nested_uplevels.t0000644000175000017500000000322111720606431016673 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More; use Sub::Uplevel; package Wrap; use Sub::Uplevel; sub wrap { my ($n, $f, $depth, $up, @case) = @_; if ($n > 1) { $n--; return wrap( $n, $f, $depth, $up, @case ); } else { return uplevel( $up , $f, $depth, $up, @case ); } } package Call; sub recurse_call_check { my ($depth, $up, @case) = @_; if ( $depth ) { $depth--; my @result; push @result, recurse_call_check($depth, $up, @case, 'Call' ); for my $n ( 1 .. $up ) { push @result, Wrap::wrap( $n, \&recurse_call_check, $depth, $n, @case, $n == 1 ? "Wrap(Call)" : "Wrap(Call) x $n" ), ; } return @result; } else { my (@uplevel_callstack, @real_callstack); my $i = 0; while ( defined( my $caller = caller($i++) ) ) { push @uplevel_callstack, $caller; } $i = 0; while ( defined( my $caller = CORE::caller($i++) ) ) { push @real_callstack, $caller; } return [ join( q{, }, @case ), join( q{, }, reverse @uplevel_callstack ), join( q{, }, reverse @real_callstack ), ]; } } package main; my $depth = 4; my $up = 3; my $cases = 104; plan tests => $cases; my @results = Call::recurse_call_check( $depth, $up, 'Call' ); is( scalar @results, $cases, "Right number of cases" ); my $expected = shift @results; for my $got ( @results ) { is( $got->[1], $expected->[1], "Case: $got->[0]" ) or diag( "Real callers: $got->[2]" ); } Sub-Uplevel-0.24/t/09_emptylist.t0000644000175000017500000000100411720606431015527 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More; use Sub::Uplevel; plan tests => 3; sub get_caller { return caller(shift); } sub wrapper { my $height = shift; return uplevel 1, \&get_caller, $height; } { my @caller = wrapper(0); ok(scalar @caller, "caller(N) in stack returns list"); } { my @caller = wrapper(1); is(scalar @caller, 0, "caller(N) out of stack returns empty list"); } { my @caller = caller; is(scalar @caller, 0, "caller from main returns empty list"); } Sub-Uplevel-0.24/t/01_die_check.t0000644000175000017500000000071211720606431015370 0ustar daviddavid#!/usr/bin/perl # Kirk: How we deal with death is at least as important as how we deal # with life, wouldn't you say? # Saavik: As I indicated, Admiral, that thought had not occurred to me. # Kirk: Well, now you have something new to think about. Carry on. # XXX DG: Why is this test here? Seems pointless. Oh, well. use strict; BEGIN { $^W = 1 } use Test::More tests => 1; #line 12 eval { die }; is( $@, "Died at $0 line 12.\n" ); Sub-Uplevel-0.24/t/08_exporter.t0000644000175000017500000000050111720606431015345 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More; plan tests => 1; # Goal of these tests: confirm that Sub::Uplevel will work with Exporter's # import() function package main; require t::lib::Importer; require t::lib::Bar; t::lib::Importer::import_for_me('t::lib::Bar','func3'); can_ok('main','func3'); Sub-Uplevel-0.24/t/00-compile.t0000644000175000017500000000307711720606431015046 0ustar daviddavid#!perl use strict; use warnings; use Test::More; use File::Find; use File::Temp qw{ tempdir }; my @modules; find( sub { return if $File::Find::name !~ /\.pm\z/; my $found = $File::Find::name; $found =~ s{^lib/}{}; $found =~ s{[/\\]}{::}g; $found =~ s/\.pm$//; # nothing to skip push @modules, $found; }, 'lib', ); sub _find_scripts { my $dir = shift @_; my @found_scripts = (); find( sub { return unless -f; my $found = $File::Find::name; # nothing to skip open my $FH, '<', $_ or do { note( "Unable to open $found in ( $! ), skipping" ); return; }; my $shebang = <$FH>; return unless $shebang =~ /^#!.*?\bperl\b\s*$/; push @found_scripts, $found; }, $dir, ); return @found_scripts; } my @scripts; do { push @scripts, _find_scripts($_) if -d $_ } for qw{ bin script scripts }; my $plan = scalar(@modules) + scalar(@scripts); $plan ? (plan tests => $plan) : (plan skip_all => "no tests to run"); { # fake home for cpan-testers local $ENV{HOME} = tempdir( CLEANUP => 1 ); like( qx{ $^X -Ilib -e "require $_; print '$_ ok'" }, qr/^\s*$_ ok/s, "$_ loaded ok" ) for sort @modules; SKIP: { eval "use Test::Script 1.05; 1;"; skip "Test::Script needed to test script compilation", scalar(@scripts) if $@; foreach my $file ( @scripts ) { my $script = $file; $script =~ s!.*/!!; script_compiles( $file, "$script script compiles" ); } } } Sub-Uplevel-0.24/t/06_db_args.t0000644000175000017500000000104111720606431015074 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More tests => 3; BEGIN { use_ok('Sub::Uplevel'); } sub get_caller_args { package DB; my @x = caller(1); return @DB::args; } sub addition { my $x; $x += $_ for @_; return $x; } sub wrap_addition { my @args = get_caller_args(); my $sum = uplevel 1, \&addition, @_; return ($sum, @args); } my ($sum, @args) = wrap_addition(1, 2, 3); is($sum, 6, "wrapper returned value correct"); is_deeply( \@args, [1, 2, 3], "wrapper returned args correct" ); Sub-Uplevel-0.24/t/02_uplevel.t0000644000175000017500000001071511720606431015153 0ustar daviddavid#!/usr/bin/perl use strict; BEGIN { $^W = 1 } use Test::More tests => 23; BEGIN { use_ok('Sub::Uplevel'); } can_ok('Sub::Uplevel', 'uplevel'); can_ok(__PACKAGE__, 'uplevel'); #line 11 ok( !caller, "top-level caller() not screwed up" ); eval { die }; is( $@, "Died at $0 line 13.\n", 'die() not screwed up' ); sub foo { join " - ", caller; } sub bar { uplevel(1, \&foo); } #line 25 is( bar(), "main - $0 - 25", 'uplevel()' ); # Sure, but does it fool die? sub try_die { die "You must die! I alone am best!"; } sub wrap_die { uplevel(1, \&try_die); } # line 38 eval { wrap_die() }; is( $@, "You must die! I alone am best! at $0 line 30.\n", 'die() fooled' ); # how about warn? sub try_warn { warn "HA! You don't fool me!"; } sub wrap_warn { uplevel(1, \&try_warn); } my $warning; { local $SIG{__WARN__} = sub { $warning = join '', @_ }; #line 56 wrap_warn(); } is( $warning, "HA! You don't fool me! at $0 line 44.\n", 'warn() fooled' ); # Carp? use Carp; sub try_croak { # line 64 croak("Now we can fool croak!"); } sub wrap_croak { # line 68 uplevel(shift, \&try_croak); } # depending on perl version, we could get 'require 0' or 'eval {...}' # in the stack. This test used to be 'require 0' for <= 5.006, but # it broke on 5.005_05 test release, so we'll just take either # line 72 eval { wrap_croak(1) }; my $croak_regex = quotemeta( <<"CARP" ); Now we can fool croak! at $0 line 64 main::wrap_croak(1) called at $0 line 72 CARP $croak_regex =~ s/64/64\.?/; # Perl 5.15 series Carp adds period $croak_regex .= '\t(require 0|eval \{\.\.\.\})' . quotemeta( " called at $0 line 72" ); like( $@, "/$croak_regex/", 'croak() fooled'); # Try to wrap higher -- this may have been a problem that was exposed on # Test Exception # line 75 eval { wrap_croak(2) }; $croak_regex = quotemeta( <<"CARP" ); Now we can fool croak! at $0 line 64 CARP $croak_regex =~ s/64/64\.?/; # Perl 5.15 series Carp adds period like( $@, "/$croak_regex/", 'croak() fooled'); #line 79 ok( !caller, "caller() not screwed up" ); eval { die "Dying" }; is( $@, "Dying at $0 line 81.\n", 'die() not screwed up' ); # how about carp? sub try_carp { # line 88 carp "HA! Even carp is fooled!"; } sub wrap_carp { uplevel(1, \&try_carp); } $warning = ''; { local $SIG{__WARN__} = sub { $warning = join '', @_ }; #line 98 wrap_carp(); } my $carp_regex = quotemeta( <<"CARP" ); HA! Even carp is fooled! at $0 line 88 main::wrap_carp() called at $0 line 98 CARP $carp_regex =~ s/88/88\.?/; # Perl 5.15 series Carp adds period like( $warning, "/$carp_regex/", 'carp() fooled' ); use t::lib::Foo; can_ok( 'main', 'fooble' ); #line 114 sub core_caller_check { return CORE::caller(0); } sub caller_check { return caller(shift); } is_deeply( [ ( caller_check(0), 0, 4 )[0 .. 3] ], ['main', $0, 122, 'main::caller_check' ], 'caller check' ); is( (() = caller_check(0)), (() = core_caller_check(0)) , "caller() with args returns right number of values" ); sub core_caller_no_args { return CORE::caller(); } sub caller_no_args { return caller(); } is( (() = caller_no_args()), (() = core_caller_no_args()), "caller() with no args returns right number of values" ); sub deep_caller { return caller(1); } sub check_deep_caller { deep_caller(); } #line 134 is_deeply([(check_deep_caller)[0..2]], ['main', $0, 134], 'shallow caller' ); sub deeper { deep_caller() } # caller 0 sub still_deeper { deeper() } # caller 1 -- should give this line, 137 sub ever_deeper { still_deeper() } # caller 2 is_deeply([(ever_deeper)[0..2]], ['main', $0, 137], 'deep caller()' ); # This uplevel() should not effect deep_caller's caller(1). sub yet_deeper { uplevel( 1, \&ever_deeper) } is_deeply([(yet_deeper)[0..2]], ['main', $0, 137], 'deep caller() + uplevel' ); sub target { caller } sub yarrow { uplevel( 1, \&target ) } sub hock { uplevel( 1, \&yarrow ) } is_deeply([(hock)], ['main', $0, 150], 'nested uplevel()s' ); # Deep caller inside uplevel package Delegator; # line 159 sub delegate { main::caller_check(shift) } package Wrapper; use Sub::Uplevel; sub wrap { uplevel( 1, \&Delegator::delegate, @_ ) } package main; is( (Wrapper::wrap(0))[0], 'Delegator', 'deep caller check of parent sees real calling package' ); is( (Wrapper::wrap(1))[0], 'main', 'deep caller check of grandparent sees package above uplevel' ); Sub-Uplevel-0.24/t/lib/0000755000175000017500000000000011720606431013553 5ustar daviddavidSub-Uplevel-0.24/t/lib/Importer.pm0000644000175000017500000000046711720606431015721 0ustar daviddavidpackage t::lib::Importer; use warnings; use strict; use Sub::Uplevel qw/:aggressive/; sub import_for_me { my ($pkg, @p) = @_; my $level = 1; my $import = $pkg->can('import'); if ($import) { uplevel $level, $import, ($pkg, @p); } else { warn "no import in $pkg\n"; } } 1; Sub-Uplevel-0.24/t/lib/Bar.pm0000644000175000017500000000021311720606431014611 0ustar daviddavidpackage t::lib::Bar; use warnings; use strict; require Exporter; our @ISA = qw(Exporter); our @EXPORT_OK = qw( func3 ); sub func3 { 3 } 1; Sub-Uplevel-0.24/t/lib/Foo.pm0000644000175000017500000000023411720606431014633 0ustar daviddavidpackage t::lib::Foo; # Hook::LexWrap does this, Sub::Uplevel appears to interfere. sub import { *{caller()."::fooble"} = \&fooble } sub fooble { 42 } 1; Sub-Uplevel-0.24/Makefile.PL0000644000175000017500000000225411720606431014517 0ustar daviddavid use strict; use warnings; use 5.006; use ExtUtils::MakeMaker 6.30; my %WriteMakefileArgs = ( "ABSTRACT" => "apparently run a function in a higher stack frame", "AUTHOR" => "Michael Schwern , David Golden ", "BUILD_REQUIRES" => { "Exporter" => 0, "File::Find" => 0, "File::Temp" => 0, "Test::More" => 0 }, "CONFIGURE_REQUIRES" => { "ExtUtils::MakeMaker" => "6.30" }, "DISTNAME" => "Sub-Uplevel", "EXE_FILES" => [], "LICENSE" => "perl", "NAME" => "Sub::Uplevel", "PREREQ_PM" => { "Carp" => 0, "constant" => 0, "strict" => 0, "warnings" => 0 }, "VERSION" => "0.24", "test" => { "TESTS" => "t/*.t" } ); unless ( eval { ExtUtils::MakeMaker->VERSION(6.56) } ) { my $br = delete $WriteMakefileArgs{BUILD_REQUIRES}; my $pp = $WriteMakefileArgs{PREREQ_PM}; for my $mod ( keys %$br ) { if ( exists $pp->{$mod} ) { $pp->{$mod} = $br->{$mod} if $br->{$mod} > $pp->{$mod}; } else { $pp->{$mod} = $br->{$mod}; } } } delete $WriteMakefileArgs{CONFIGURE_REQUIRES} unless eval { ExtUtils::MakeMaker->VERSION(6.52) }; WriteMakefile(%WriteMakefileArgs); Sub-Uplevel-0.24/META.json0000644000175000017500000000334011720606431014163 0ustar daviddavid{ "abstract" : "apparently run a function in a higher stack frame", "author" : [ "Michael Schwern ", "David Golden " ], "dynamic_config" : 0, "generated_by" : "Dist::Zilla version 4.300005, CPAN::Meta::Converter version 2.112621", "license" : [ "perl_5" ], "meta-spec" : { "url" : "http://search.cpan.org/perldoc?CPAN::Meta::Spec", "version" : "2" }, "name" : "Sub-Uplevel", "no_index" : { "directory" : [ "t", "xt", "examples", "corpus" ], "package" : [ "DB" ] }, "prereqs" : { "configure" : { "requires" : { "ExtUtils::MakeMaker" : "6.30" } }, "runtime" : { "requires" : { "Carp" : 0, "constant" : 0, "perl" : "5.006", "strict" : 0, "warnings" : 0 } }, "test" : { "requires" : { "Exporter" : 0, "File::Find" : 0, "File::Temp" : 0, "Test::More" : 0 } } }, "provides" : { "Sub::Uplevel" : { "file" : "lib/Sub/Uplevel.pm", "version" : "0.24" } }, "release_status" : "stable", "resources" : { "bugtracker" : { "mailto" : "bug-sub-uplevel at rt.cpan.org", "web" : "http://rt.cpan.org/Public/Dist/Display.html?Name=Sub-Uplevel" }, "homepage" : "https://github.com/dagolden/sub-uplevel", "repository" : { "type" : "git", "url" : "https://github.com/dagolden/sub-uplevel.git", "web" : "https://github.com/dagolden/sub-uplevel" } }, "version" : "0.24" } Sub-Uplevel-0.24/MANIFEST0000644000175000017500000000105011720606431013667 0ustar daviddavidChanges LICENSE MANIFEST META.json META.yml Makefile.PL README README.PATCHING dist.ini examples/uplevel-demo.pl lib/Sub/Uplevel.pm perlcritic.rc t/00-compile.t t/01_die_check.t t/02_uplevel.t t/03_nested_uplevels.t t/04_honor_later_override.t t/05_honor_prior_override.t t/06_db_args.t t/07_uplevel_too_high.t t/08_exporter.t t/09_emptylist.t t/lib/Bar.pm t/lib/Foo.pm t/lib/Importer.pm xt/author/critic.t xt/author/pod-spell.t xt/release/distmeta.t xt/release/pod-coverage.t xt/release/pod-syntax.t xt/release/portability.t xt/release/test-version.t Sub-Uplevel-0.24/META.yml0000644000175000017500000000166611720606431014024 0ustar daviddavid--- abstract: 'apparently run a function in a higher stack frame' author: - 'Michael Schwern ' - 'David Golden ' build_requires: Exporter: 0 File::Find: 0 File::Temp: 0 Test::More: 0 configure_requires: ExtUtils::MakeMaker: 6.30 dynamic_config: 0 generated_by: 'Dist::Zilla version 4.300005, CPAN::Meta::Converter version 2.112621' license: perl meta-spec: url: http://module-build.sourceforge.net/META-spec-v1.4.html version: 1.4 name: Sub-Uplevel no_index: directory: - t - xt - examples - corpus package: - DB provides: Sub::Uplevel: file: lib/Sub/Uplevel.pm version: 0.24 requires: Carp: 0 constant: 0 perl: 5.006 strict: 0 warnings: 0 resources: bugtracker: http://rt.cpan.org/Public/Dist/Display.html?Name=Sub-Uplevel homepage: https://github.com/dagolden/sub-uplevel repository: https://github.com/dagolden/sub-uplevel.git version: 0.24 Sub-Uplevel-0.24/dist.ini0000644000175000017500000000047011720606431014207 0ustar daviddavidname = Sub-Uplevel author = Michael Schwern author = David Golden license = Perl_5 copyright_holder = Michael Schwern and David Golden [@DAGOLDEN] stopwords = PadWalker stopwords = Tcl's stopwords = Welch stopwords = uplevel Sub-Uplevel-0.24/LICENSE0000644000175000017500000004374711720606431013566 0ustar daviddavidThis software is copyright (c) 2012 by Michael Schwern and David Golden. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. Terms of the Perl programming language system itself a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or b) the "Artistic License" --- The GNU General Public License, Version 1, February 1989 --- This software is Copyright (c) 2012 by Michael Schwern and David Golden. This is free software, licensed under: The GNU General Public License, Version 1, February 1989 GNU GENERAL PUBLIC LICENSE Version 1, February 1989 Copyright (C) 1989 Free Software Foundation, Inc. 51 Franklin St, Suite 500, Boston, MA 02110-1335 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The license agreements of most software companies try to keep users at the mercy of those companies. By contrast, our General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. The General Public License applies to the Free Software Foundation's software and to any other program whose authors commit to using it. You can use it for your programs, too. When we speak of free software, we are referring to freedom, not price. Specifically, the General Public License is designed to make sure that you have the freedom to give away or sell copies of free software, that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of a such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must tell them their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License Agreement applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any work containing the Program or a portion of it, either verbatim or with modifications. Each licensee is addressed as "you". 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this General Public License and to the absence of any warranty; and give any other recipients of the Program a copy of this General Public License along with the Program. You may charge a fee for the physical act of transferring a copy. 2. You may modify your copy or copies of the Program or any portion of it, and copy and distribute such modifications under the terms of Paragraph 1 above, provided that you also do the following: a) cause the modified files to carry prominent notices stating that you changed the files and the date of any change; and b) cause the whole of any work that you distribute or publish, that in whole or in part contains the Program or any part thereof, either with or without modifications, to be licensed at no charge to all third parties under the terms of this General Public License (except that you may choose to grant warranty protection to some or all third parties, at your option). c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the simplest and most usual way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this General Public License. d) You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. Mere aggregation of another independent work with the Program (or its derivative) on a volume of a storage or distribution medium does not bring the other work under the scope of these terms. 3. You may copy and distribute the Program (or a portion or derivative of it, under Paragraph 2) in object code or executable form under the terms of Paragraphs 1 and 2 above provided that you also do one of the following: a) accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Paragraphs 1 and 2 above; or, b) accompany it with a written offer, valid for at least three years, to give any third party free (except for a nominal charge for the cost of distribution) a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Paragraphs 1 and 2 above; or, c) accompany it with the information you received as to where the corresponding source code may be obtained. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form alone.) Source code for a work means the preferred form of the work for making modifications to it. For an executable file, complete source code means all the source code for all modules it contains; but, as a special exception, it need not include source code for modules which are standard libraries that accompany the operating system on which the executable file runs, or for standard header files or definitions files that accompany that operating system. 4. You may not copy, modify, sublicense, distribute or transfer the Program except as expressly provided under this General Public License. Any attempt otherwise to copy, modify, sublicense, distribute or transfer the Program is void, and will automatically terminate your rights to use the Program under this License. However, parties who have received copies, or rights to use copies, from you under this General Public License will not have their licenses terminated so long as such parties remain in full compliance. 5. By copying, distributing or modifying the Program (or any work based on the Program) you indicate your acceptance of this license to do so, and all its terms and conditions. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. 7. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of the license which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the license, you may choose any version ever published by the Free Software Foundation. 8. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS Appendix: How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to humanity, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19xx name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (a program to direct compilers to make passes at assemblers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice That's all there is to it! --- The Artistic License 1.0 --- This software is Copyright (c) 2012 by Michael Schwern and David Golden. This is free software, licensed under: The Artistic License 1.0 The Artistic License Preamble The intent of this document is to state the conditions under which a Package may be copied, such that the Copyright Holder maintains some semblance of artistic control over the development of the package, while giving the users of the package the right to use and distribute the Package in a more-or-less customary fashion, plus the right to make reasonable modifications. Definitions: - "Package" refers to the collection of files distributed by the Copyright Holder, and derivatives of that collection of files created through textual modification. - "Standard Version" refers to such a Package if it has not been modified, or has been modified in accordance with the wishes of the Copyright Holder. - "Copyright Holder" is whoever is named in the copyright or copyrights for the package. - "You" is you, if you're thinking about copying or distributing this Package. - "Reasonable copying fee" is whatever you can justify on the basis of media cost, duplication charges, time of people involved, and so on. (You will not be required to justify it to the Copyright Holder, but only to the computing community at large as a market that must bear the fee.) - "Freely Available" means that no fee is charged for the item itself, though there may be fees involved in handling the item. It also means that recipients of the item may redistribute it under the same conditions they received it. 1. You may make and give away verbatim copies of the source form of the Standard Version of this Package without restriction, provided that you duplicate all of the original copyright notices and associated disclaimers. 2. You may apply bug fixes, portability fixes and other modifications derived from the Public Domain or from the Copyright Holder. A Package modified in such a way shall still be considered the Standard Version. 3. You may otherwise modify your copy of this Package in any way, provided that you insert a prominent notice in each changed file stating how and when you changed that file, and provided that you do at least ONE of the following: a) place your modifications in the Public Domain or otherwise make them Freely Available, such as by posting said modifications to Usenet or an equivalent medium, or placing the modifications on a major archive site such as ftp.uu.net, or by allowing the Copyright Holder to include your modifications in the Standard Version of the Package. b) use the modified Package only within your corporation or organization. c) rename any non-standard executables so the names do not conflict with standard executables, which must also be provided, and provide a separate manual page for each non-standard executable that clearly documents how it differs from the Standard Version. d) make other distribution arrangements with the Copyright Holder. 4. 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The End Sub-Uplevel-0.24/Changes0000644000175000017500000001134411720606431014040 0ustar daviddavidChanges for Sub::Uplevel 0.24 2012-02-20 22:18:46 EST5EDT - no changes from 0.23_03 0.23_03 2012-02-07 17:16:49 EST5EDT - fixed: additional test regex fixed 0.23_02 2012-02-07 14:32:53 EST5EDT - fixed: Perl 5.15 series Carp changes output format of messages (adds a period). This fixes the test regular expressions. [Andreas Koenig] 0.23_01 2012-02-02 10:41:31 EST5EDT - added: the $Sub::Uplevel::CHECK_FRAMES global constant to enable the frame depth checking and compile it out if not needed. [Adam Kennedy] 0.22 Tue Nov 17 05:38:42 EST 2009 - meta: added repository to metadata [Alexandr Ciornii] 0.21_01 Sat Nov 29 15:24:49 EST 2008 - added: the ":aggressive" tag may be used to force reloading of Exporter, which often binds caller() prior to Sub::Uplevel's global override 0.2002 Thu Sep 11 14:33:09 EDT 2008 - changed: removed Exporter dependency - test fix: fixed strange t/07_uplevel_too_high.t fail on Win32 0.2001 Tue Sep 9 22:22:40 EDT 2008 - test fix: changed prior override test to be more robust (SCHWERN) 0.20 Tue Sep 9 19:23:35 EDT 2008 - changed: bumped perl requirement to 5.006 and stopped using vars (fixes a test bug under Test::More > 0.80) 0.19_03 Fri Jul 4 13:31:21 EDT 2008 - fixed: load Carp only as needed (fixes problem on 5.005) 0.19_02 Thu Feb 21 14:58:46 EST 2008 - added: uplevel will warn if uplevel request is more than the call stack depth 0.1901 Thu Feb 14 14:07:37 EST 2008 - fixed: hides the "DB" package from indexers (DB used to support @DB::args) 0.19 Thu Feb 14 11:50:16 EST 2008 - bug fix: replacement caller() correctly sets @DB::args if calling package is DB - repackaging: custom Build.PL, moved all author tests to xt/, added LICENSE and INSTALL files 0.18 Wed Oct 31 06:56:13 EDT 2007 - release version of 0.17_01 changes 0.17_01 - removed 5.006-specific language and tested on prerelease 5.00505 0.16 Mon Jul 30 09:54:41 EDT 2007 - release version of 0.15_01 changes 0.15_01 Thu Jul 5 22:54:08 EDT 2007 - Won't override any existing CORE::GLOBAL::caller when loaded - Localize global caller() override to the scope of the uplevel() call so it can play nicer with things like Contextual::Return and Hook::LexWrap that also override caller() 0.14 Sun Nov 5 23:38:46 EST 2006 - fixed t/99_pod_coverage.t bug - added examples directory 0.13 Thu Jun 22 19:47:26 EDT 2006 - fixed bug in Uplevel.t that caused test failure on FreeBSD for 5.8.0 - fixed bug in Uplevel.t that caused test failure on bleadperl-5.9.4 - removed ancient Test::More provided in t/lib - switched ok(eq_array()) tests to is_deeper() for better diagnostics - added pod/pod coverage checks - numbered tests 0.12 Fri May 12 18:33:40 EDT 2006 - official release of the uplevel stack patch (fixes RT#13893) - added Build.PL and switched to boilerplate generated Makefile.PL - removed SIGNATURE due to recently discovered Module::Signature issues with newline handling and sub-key compatible keyservers - updated/added various meta files 0.11_01 Fri Apr 21 00:49:51 EDT 2006 - uplevel now keeps a proper stack of uplevel calls allowing nesting of uplevel and non-uplevel calls 0.10 Thu Apr 20 19:15:20 EDT 2006 - Stopped warnings about "undefined" on Perl 5.8.8 - DAGOLDEN added as co-maintainer 0.09 Wed Jul 7 14:52:08 EDT 2004 - Ok, ok. I'll put a license on this. 0.08 Wed Oct 22 09:02:38 PDT 2003 - New die_check.t test was written in a non-portable manner. [Thanks Martin Thurn and cpantesters] 0.07 Tue Mar 18 03:03:22 GMT 2003 - Fixed a test bug due to 5.6.0's differing Carp::croak stack output 0.06 Thu Sep 20 08:50:30 EDT 2001 * Fixed a bug with deeply nested callers. * Fixed nested uplevel() calls. - Forgot to include Test::More dependency - Added 5.006 dependency to Makefile.PL - Removed unnecessary die and warn overrides - Added DIRE WARNING to the docs. 0.05 Wed Sep 19 06:00:12 EDT 2001 * Things were still pretty broken. I *think* I have the tests sorted out now. * Blows over any CORE::GLOBAL::caller, die or warn you might have set. I'll fix this soon. 0.04 Wed Sep 19 04:28:19 EDT 2001 * Ooops, we'd broken caller(). Turns out the tests were wrong. 0.03 Wed Sep 19 03:41:59 EDT 2001 * Greatly simplified the uplevel logic 0.02 Wed Sep 19 03:03:10 EDT 2001 * Fools croak() 0.01 Wed Sep 19 00:19:38 EDT 2001 * First working version * Fools caller(), die() and warn(). - Needs more work against, say, Carp. - Needs more work to check that it doesn't break the subtleties of caller, die and warn. Sub-Uplevel-0.24/README0000644000175000017500000001210411720606431013420 0ustar daviddavidNAME Sub::Uplevel - apparently run a function in a higher stack frame VERSION version 0.24 SYNOPSIS use Sub::Uplevel; sub foo { print join " - ", caller; } sub bar { uplevel 1, \&foo; } #line 11 bar(); # main - foo.plx - 11 DESCRIPTION Like Tcl's uplevel() function, but not quite so dangerous. The idea is just to fool caller(). All the really naughty bits of Tcl's uplevel() are avoided. THIS IS NOT THE SORT OF THING YOU WANT TO DO EVERYDAY uplevel uplevel $num_frames, \&func, @args; Makes the given function think it's being executed $num_frames higher than the current stack level. So when they use caller($frames) it will actually give caller($frames + $num_frames) for them. "uplevel(1, \&some_func, @_)" is effectively "goto &some_func" but you don't immediately exit the current subroutine. So while you can't do this: sub wrapper { print "Before\n"; goto &some_func; print "After\n"; } you can do this: sub wrapper { print "Before\n"; my @out = uplevel 1, &some_func; print "After\n"; return @out; } "uplevel" has the ability to issue a warning if $num_frames is more than the current call stack depth, although this warning is disabled and compiled out by default as the check is relatively expensive. To enable the check for debugging or testing, you should set the global $Sub::Uplevel::CHECK_FRAMES to true before loading Sub::Uplevel for the first time as follows: #!/usr/bin/perl BEGIN { $Sub::Uplevel::CHECK_FRAMES = 1; } use Sub::Uplevel; Setting or changing the global after the module has been loaded will have no effect. EXAMPLE The main reason I wrote this module is so I could write wrappers around functions and they wouldn't be aware they've been wrapped. use Sub::Uplevel; my $original_foo = \&foo; *foo = sub { my @output = uplevel 1, $original_foo; print "foo() returned: @output"; return @output; }; If this code frightens you you should not use this module. BUGS and CAVEATS Well, the bad news is uplevel() is about 5 times slower than a normal function call. XS implementation anyone? It also slows down every invocation of caller(), regardless of whether uplevel() is in effect. Sub::Uplevel overrides CORE::GLOBAL::caller temporarily for the scope of each uplevel call. It does its best to work with any previously existing CORE::GLOBAL::caller (both when Sub::Uplevel is first loaded and within each uplevel call) such as from Contextual::Return or Hook::LexWrap. However, if you are routinely using multiple modules that override CORE::GLOBAL::caller, you are probably asking for trouble. You should load Sub::Uplevel as early as possible within your program. As with all CORE::GLOBAL overloading, the overload will not affect modules that have already been compiled prior to the overload. One module that often is unavoidably loaded prior to Sub::Uplevel is Exporter. To forcibly recompile Exporter (and Exporter::Heavy) after loading Sub::Uplevel, use it with the ":aggressive" tag: use Sub::Uplevel qw/:aggressive/; The private function "Sub::Uplevel::_force_reload()" may be passed a list of additional modules to reload if ":aggressive" is not aggressive enough. Reloading modules may break things, so only use this as a last resort. As of version 0.20, Sub::Uplevel requires Perl 5.6 or greater. HISTORY Those who do not learn from HISTORY are doomed to repeat it. The lesson here is simple: Don't sit next to a Tcl programmer at the dinner table. THANKS Thanks to Brent Welch, Damian Conway and Robin Houston. See http://www.perl.com/perl/misc/Artistic.html SEE ALSO PadWalker (for the similar idea with lexicals), Hook::LexWrap, Tcl's uplevel() at http://www.scriptics.com/man/tcl8.4/TclCmd/uplevel.htm SUPPORT Bugs / Feature Requests Please report any bugs or feature requests through the issue tracker at . You will be notified automatically of any progress on your issue. Source Code This is open source software. The code repository is available for public review and contribution under the terms of the license. git clone https://github.com/dagolden/sub-uplevel.git AUTHORS * Michael Schwern * David Golden COPYRIGHT AND LICENSE This software is copyright (c) 2012 by Michael Schwern and David Golden. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.