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diff --git a/lib/Exporter/Tiny.pm b/lib/Exporter/Tiny.pm new file mode 100644 index 0000000..6e77338 --- /dev/null +++ b/lib/Exporter/Tiny.pm @@ -0,0 +1,833 @@ +package Exporter::Tiny; + +use 5.006001; +use strict; +use warnings; no warnings qw(void once uninitialized numeric redefine); + +our $AUTHORITY = 'cpan:TOBYINK'; +our $VERSION = '0.042'; +our @EXPORT_OK = qw< mkopt mkopt_hash _croak _carp >; + +sub _croak ($;@) { require Carp; my $fmt = shift; @_ = sprintf($fmt, @_); goto \&Carp::croak } +sub _carp ($;@) { require Carp; my $fmt = shift; @_ = sprintf($fmt, @_); goto \&Carp::carp } + +my $_process_optlist = sub +{ + my $class = shift; + my ($global_opts, $opts, $want, $not_want) = @_; + + while (@$opts) + { + my $opt = shift @{$opts}; + my ($name, $value) = @$opt; + + ($name =~ m{\A\!(/.+/[msixpodual]+)\z}) ? + do { + my @not = $class->_exporter_expand_regexp($1, $value, $global_opts); + ++$not_want->{$_->[0]} for @not; + } : + ($name =~ m{\A\!(.+)\z}) ? + (++$not_want->{$1}) : + ($name =~ m{\A[:-](.+)\z}) ? + push(@$opts, $class->_exporter_expand_tag($1, $value, $global_opts)) : + ($name =~ m{\A/.+/[msixpodual]+\z}) ? + push(@$opts, $class->_exporter_expand_regexp($name, $value, $global_opts)) : + # else ? + push(@$want, $opt); + } +}; + +sub import +{ + my $class = shift; + my $global_opts = +{ @_ && ref($_[0]) eq q(HASH) ? %{+shift} : () }; + $global_opts->{into} = caller unless exists $global_opts->{into}; + + my @want; + my %not_want; $global_opts->{not} = \%not_want; + my @args = do { no strict qw(refs); @_ ? @_ : @{"$class\::EXPORT"} }; + my $opts = mkopt(\@args); + $class->$_process_optlist($global_opts, $opts, \@want, \%not_want); + + my $permitted = $class->_exporter_permitted_regexp($global_opts); + $class->_exporter_validate_opts($global_opts); + + for my $wanted (@want) + { + next if $not_want{$wanted->[0]}; + + my %symbols = $class->_exporter_expand_sub(@$wanted, $global_opts, $permitted); + $class->_exporter_install_sub($_, $wanted->[1], $global_opts, $symbols{$_}) + for keys %symbols; + } +} + +sub unimport +{ + my $class = shift; + my $global_opts = +{ @_ && ref($_[0]) eq q(HASH) ? %{+shift} : () }; + $global_opts->{into} = caller unless exists $global_opts->{into}; + $global_opts->{is_unimport} = 1; + + my @want; + my %not_want; $global_opts->{not} = \%not_want; + my @args = do { our %TRACKED; @_ ? @_ : keys(%{$TRACKED{$class}{$global_opts->{into}}}) }; + my $opts = mkopt(\@args); + $class->$_process_optlist($global_opts, $opts, \@want, \%not_want); + + my $permitted = $class->_exporter_permitted_regexp($global_opts); + $class->_exporter_validate_unimport_opts($global_opts); + + my $expando = $class->can('_exporter_expand_sub'); + $expando = undef if $expando == \&_exporter_expand_sub; + + for my $wanted (@want) + { + next if $not_want{$wanted->[0]}; + + if ($wanted->[1]) + { + _carp("Passing options to unimport '%s' makes no sense", $wanted->[0]) + unless (ref($wanted->[1]) eq 'HASH' and not keys %{$wanted->[1]}); + } + + my %symbols = defined($expando) + ? $class->$expando(@$wanted, $global_opts, $permitted) + : ($wanted->[0] => sub { "dummy" }); + $class->_exporter_uninstall_sub($_, $wanted->[1], $global_opts) + for keys %symbols; + } +} + +# Called once per import/unimport, passed the "global" import options. +# Expected to validate the options and carp or croak if there are problems. +# Can also take the opportunity to do other stuff if needed. +# +sub _exporter_validate_opts { 1 } +sub _exporter_validate_unimport_opts { 1 } + +# Called after expanding a tag or regexp to merge the tag's options with +# any sub-specific options. +# +sub _exporter_merge_opts +{ + my $class = shift; + my ($tag_opts, $global_opts, @stuff) = @_; + + $tag_opts = {} unless ref($tag_opts) eq q(HASH); + _croak('Cannot provide an -as option for tags') + if exists $tag_opts->{-as}; + + my $optlist = mkopt(\@stuff); + for my $export (@$optlist) + { + next if defined($export->[1]) && ref($export->[1]) ne q(HASH); + + my %sub_opts = ( %{ $export->[1] or {} }, %$tag_opts ); + $sub_opts{-prefix} = sprintf('%s%s', $tag_opts->{-prefix}, $export->[1]{-prefix}) + if exists($export->[1]{-prefix}) && exists($tag_opts->{-prefix}); + $sub_opts{-suffix} = sprintf('%s%s', $export->[1]{-suffix}, $tag_opts->{-suffix}) + if exists($export->[1]{-suffix}) && exists($tag_opts->{-suffix}); + $export->[1] = \%sub_opts; + } + return @$optlist; +} + +# Given a tag name, looks it up in %EXPORT_TAGS and returns the list of +# associated functions. The default implementation magically handles tags +# "all" and "default". The default implementation interprets any undefined +# tags as being global options. +# +sub _exporter_expand_tag +{ + no strict qw(refs); + + my $class = shift; + my ($name, $value, $globals) = @_; + my $tags = \%{"$class\::EXPORT_TAGS"}; + + return $class->_exporter_merge_opts($value, $globals, $tags->{$name}->($class, @_)) + if ref($tags->{$name}) eq q(CODE); + + return $class->_exporter_merge_opts($value, $globals, @{$tags->{$name}}) + if exists $tags->{$name}; + + return $class->_exporter_merge_opts($value, $globals, @{"$class\::EXPORT"}, @{"$class\::EXPORT_OK"}) + if $name eq 'all'; + + return $class->_exporter_merge_opts($value, $globals, @{"$class\::EXPORT"}) + if $name eq 'default'; + + $globals->{$name} = $value || 1; + return; +} + +# Given a regexp-like string, looks it up in @EXPORT_OK and returns the +# list of matching functions. +# +sub _exporter_expand_regexp +{ + no strict qw(refs); + our %TRACKED; + + my $class = shift; + my ($name, $value, $globals) = @_; + my $compiled = eval("qr$name"); + + my @possible = $globals->{is_unimport} + ? keys( %{$TRACKED{$class}{$globals->{into}}} ) + : @{"$class\::EXPORT_OK"}; + + $class->_exporter_merge_opts($value, $globals, grep /$compiled/, @possible); +} + +# Helper for _exporter_expand_sub. Returns a regexp matching all subs in +# the exporter package which are available for export. +# +sub _exporter_permitted_regexp +{ + no strict qw(refs); + my $class = shift; + my $re = join "|", map quotemeta, sort { + length($b) <=> length($a) or $a cmp $b + } @{"$class\::EXPORT"}, @{"$class\::EXPORT_OK"}; + qr{^(?:$re)$}ms; +} + +# Given a sub name, returns a hash of subs to install (usually just one sub). +# Keys are sub names, values are coderefs. +# +sub _exporter_expand_sub +{ + my $class = shift; + my ($name, $value, $globals, $permitted) = @_; + $permitted ||= $class->_exporter_permitted_regexp($globals); + + no strict qw(refs); + + if ($name =~ $permitted) + { + my $generator = $class->can("_generate_$name"); + return $name => $class->$generator($name, $value, $globals) if $generator; + + my $sub = $class->can($name); + return $name => $sub if $sub; + } + + $class->_exporter_fail(@_); +} + +# Called by _exporter_expand_sub if it is unable to generate a key-value +# pair for a sub. +# +sub _exporter_fail +{ + my $class = shift; + my ($name, $value, $globals) = @_; + return if $globals->{is_unimport}; + _croak("Could not find sub '%s' exported by %s", $name, $class); +} + +# Actually performs the installation of the sub into the target package. This +# also handles renaming the sub. +# +sub _exporter_install_sub +{ + my $class = shift; + my ($name, $value, $globals, $sym) = @_; + + my $into = $globals->{into}; + my $installer = $globals->{installer} || $globals->{exporter}; + + $name = $value->{-as} || $name; + unless (ref($name) eq q(SCALAR)) + { + my ($prefix) = grep defined, $value->{-prefix}, $globals->{prefix}, q(); + my ($suffix) = grep defined, $value->{-suffix}, $globals->{suffix}, q(); + $name = "$prefix$name$suffix"; + } + + return ($$name = $sym) if ref($name) eq q(SCALAR); + return ($into->{$name} = $sym) if ref($into) eq q(HASH); + + no strict qw(refs); + + if (exists &{"$into\::$name"} and \&{"$into\::$name"} != $sym) + { + my ($level) = grep defined, $value->{-replace}, $globals->{replace}, q(0); + my $action = { + carp => \&_carp, + 0 => \&_carp, + '' => \&_carp, + warn => \&_carp, + nonfatal => \&_carp, + croak => \&_croak, + fatal => \&_croak, + die => \&_croak, + }->{$level} || sub {}; + + $action->( + $action == \&_croak + ? "Refusing to overwrite existing sub '%s::%s' with sub '%s' exported by %s" + : "Overwriting existing sub '%s::%s' with sub '%s' exported by %s", + $into, + $name, + $_[0], + $class, + ); + } + + our %TRACKED; + $TRACKED{$class}{$into}{$name} = $sym; + + no warnings qw(prototype); + $installer + ? $installer->($globals, [$name, $sym]) + : (*{"$into\::$name"} = $sym); +} + +sub _exporter_uninstall_sub +{ + our %TRACKED; + my $class = shift; + my ($name, $value, $globals, $sym) = @_; + my $into = $globals->{into}; + ref $into and return; + + no strict qw(refs); + + # Cowardly refuse to uninstall a sub that differs from the one + # we installed! + my $our_coderef = $TRACKED{$class}{$into}{$name}; + my $cur_coderef = exists(&{"$into\::$name"}) ? \&{"$into\::$name"} : -1; + return unless $our_coderef == $cur_coderef; + + my $stash = \%{"$into\::"}; + my $old = delete $stash->{$name}; + my $full_name = join('::', $into, $name); + foreach my $type (qw(SCALAR HASH ARRAY IO)) # everything but the CODE + { + next unless defined(*{$old}{$type}); + *$full_name = *{$old}{$type}; + } + + delete $TRACKED{$class}{$into}{$name}; +} + +sub mkopt +{ + my $in = shift or return []; + my @out; + + $in = [map(($_ => ref($in->{$_}) ? $in->{$_} : ()), sort keys %$in)] + if ref($in) eq q(HASH); + + for (my $i = 0; $i < @$in; $i++) + { + my $k = $in->[$i]; + my $v; + + ($i == $#$in) ? ($v = undef) : + !defined($in->[$i+1]) ? (++$i, ($v = undef)) : + !ref($in->[$i+1]) ? ($v = undef) : + ($v = $in->[++$i]); + + push @out, [ $k => $v ]; + } + + \@out; +} + +sub mkopt_hash +{ + my $in = shift or return; + my %out = map +($_->[0] => $_->[1]), @{ mkopt($in) }; + \%out; +} + +1; + +__END__ + +=pod + +=encoding utf-8 + +=for stopwords frobnicate greps regexps + +=head1 NAME + +Exporter::Tiny - an exporter with the features of Sub::Exporter but only core dependencies + +=head1 SYNOPSIS + + package MyUtils; + use base "Exporter::Tiny"; + our @EXPORT = qw(frobnicate); + sub frobnicate { my $n = shift; ... } + 1; + + package MyScript; + use MyUtils "frobnicate" => { -as => "frob" }; + print frob(42); + exit; + +=head1 DESCRIPTION + +Exporter::Tiny supports many of Sub::Exporter's external-facing features +including renaming imported functions with the C<< -as >>, C<< -prefix >> and +C<< -suffix >> options; explicit destinations with the C<< into >> option; +and alternative installers with the C<< installler >> option. But it's written +in only about 40% as many lines of code and with zero non-core dependencies. + +Its internal-facing interface is closer to Exporter.pm, with configuration +done through the C<< @EXPORT >>, C<< @EXPORT_OK >> and C<< %EXPORT_TAGS >> +package variables. + +Exporter::Tiny performs most of its internal duties (including resolution +of tag names to sub names, resolution of sub names to coderefs, and +installation of coderefs into the target package) as method calls, which +means they can be overridden to provide interesting behaviour. + +=head2 Utility Functions + +These are really for internal use, but can be exported if you need them. + +=over + +=item C<< mkopt(\@array) >> + +Similar to C<mkopt> from L<Data::OptList>. It doesn't support all the +fancy options that Data::OptList does (C<moniker>, C<require_unique>, +C<must_be> and C<name_test>) but runs about 50% faster. + +=item C<< mkopt_hash(\@array) >> + +Similar to C<mkopt_hash> from L<Data::OptList>. See also C<mkopt>. + +=back + +=head1 TIPS AND TRICKS IMPORTING FROM EXPORTER::TINY + +For the purposes of this discussion we'll assume we have a module called +C<< MyUtils >> which exports one function, C<< frobnicate >>. C<< MyUtils >> +inherits from Exporter::Tiny. + +Many of these tricks may seem familiar from L<Sub::Exporter>. That is +intentional. Exporter::Tiny doesn't attempt to provide every feature of +Sub::Exporter, but where it does it usually uses a fairly similar API. + +=head2 Basic importing + + # import "frobnicate" function + use MyUtils "frobnicate"; + + # import all functions that MyUtils offers + use MyUtils -all; + +=head2 Renaming imported functions + + # call it "frob" + use MyUtils "frobnicate" => { -as => "frob" }; + + # call it "my_frobnicate" + use MyUtils "frobnicate" => { -prefix => "my_" }; + + # can set a prefix for *all* functions imported from MyUtils + # by placing the options hashref *first*. + use MyUtils { prefix => "my_" }, "frobnicate"; + # (note the lack of hyphen before `prefix`.) + + # call it "frobnicate_util" + use MyUtils "frobnicate" => { -suffix => "_util" }; + use MyUtils { suffix => "_util" }, "frobnicate"; + + # import it twice with two different names + use MyUtils + "frobnicate" => { -as => "frob" }, + "frobnicate" => { -as => "frbnct" }; + +=head2 Lexical subs + + { + use Sub::Exporter::Lexical lexical_installer => { -as => "lex" }; + use MyUtils { installer => lex }, "frobnicate"; + + frobnicate(...); # ok + } + + frobnicate(...); # not ok + +=head2 Import functions into another package + + use MyUtils { into => "OtherPkg" }, "frobnicate"; + + OtherPkg::frobincate(...); + +=head2 Import functions into a scalar + + my $func; + use MyUtils "frobnicate" => { -as => \$func }; + + $func->(...); + +=head2 Import functions into a hash + +OK, Sub::Exporter doesn't do this... + + my %funcs; + use MyUtils { into => \%funcs }, "frobnicate"; + + $funcs{frobnicate}->(...); + +=head2 DO NOT WANT! + +This imports everything except "frobnicate": + + use MyUtils qw( -all !frobnicate ); + +Negated imports always "win", so the following will not import +"frobnicate", no matter how many times you repeat it... + + use MyUtils qw( !frobnicate frobnicate frobnicate frobnicate ); + +=head2 Importing by regexp + +Here's how you could import all functions beginning with an "f": + + use MyUtils qw( /^F/i ); + +Or import everything except functions beginning with a "z": + + use MyUtils qw( -all !/^Z/i ); + +Note that regexps are always supplied as I<strings> starting with +C<< "/" >>, and not as quoted regexp references (C<< qr/.../ >>). + +=head2 Unimporting + +You can unimport the functions that MyUtils added to your namespace: + + no MyUtils; + +Or just specific ones: + + no MyUtils qw(frobnicate); + +If you renamed a function when you imported it, you should unimport by +the new name: + + use MyUtils frobnicate => { -as => "frob" }; + ...; + no MyUtils "frob"; + +Unimporting using tags and regexps should mostly do what you want. + +=head1 TIPS AND TRICKS EXPORTING USING EXPORTER::TINY + +Simple configuration works the same as L<Exporter>; inherit from this module, +and use the C<< @EXPORT >>, C<< @EXPORT_OK >> and C<< %EXPORT_TAGS >> +package variables to list subs to export. + +=head2 Generators + +Exporter::Tiny has always allowed exported subs to be generated (like +L<Sub::Exporter>), but until version 0.025 did not have an especially nice +API for it. + +Now, it's easy. If you want to generate a sub C<foo> to export, list it in +C<< @EXPORT >> or C<< @EXPORT_OK >> as usual, and then simply give your +exporter module a class method called C<< _generate_foo >>. + + push @EXPORT_OK, 'foo'; + + sub _generate_foo { + my $class = shift; + my ($name, $args, $globals) = @_; + + return sub { + ...; + } + } + +You can also generate tags: + + my %constants; + BEGIN { + %constants = (FOO => 1, BAR => 2); + } + use constant \%constants; + + $EXPORT_TAGS{constants} = sub { + my $class = shift; + my ($name, $args, $globals) = @_; + + return keys(%constants); + }; + +=head2 Overriding Internals + +An important difference between L<Exporter> and Exporter::Tiny is that +the latter calls all its internal functions as I<< class methods >>. This +means that your subclass can I<< override them >> to alter their behaviour. + +The following methods are available to be overridden. Despite being named +with a leading underscore, they are considered public methods. (The underscore +is there to avoid accidentally colliding with any of your own function names.) + +=over + +=item C<< _exporter_validate_opts($globals) >> + +This method is called once each time C<import> is called. It is passed a +reference to the global options hash. (That is, the optional leading hashref +in the C<use> statement, where the C<into> and C<installer> options can be +provided.) + +You may use this method to munge the global options, or validate them, +throwing an exception or printing a warning. + +The default implementation does nothing interesting. + +=item C<< _exporter_validate_unimport_opts($globals) >> + +Like C<_exporter_validate_opts>, but called for C<unimport>. + +=item C<< _exporter_merge_opts($tag_opts, $globals, @exports) >> + +Called to merge options which have been provided for a tag into the +options provided for the exports that the tag expanded to. + +=item C<< _exporter_expand_tag($name, $args, $globals) >> + +This method is called to expand an import tag (e.g. C<< ":constants" >>). +It is passed the tag name (minus the leading ":"), an optional hashref +of options (like C<< { -prefix => "foo_" } >>), and the global options +hashref. + +It is expected to return a list of ($name, $args) arrayref pairs. These +names can be sub names to export, or further tag names (which must have +their ":"). If returning tag names, be careful to avoid creating a tag +expansion loop! + +The default implementation uses C<< %EXPORT_TAGS >> to expand tags, and +provides fallbacks for the C<< :default >> and C<< :all >> tags. + +=item C<< _exporter_expand_regexp($regexp, $args, $globals) >> + +Like C<_exporter_expand_regexp>, but given a regexp-like string instead +of a tag name. + +The default implementation greps through C<< @EXPORT_OK >> for imports, +and the list of already-imported functions for exports. + +=item C<< _exporter_expand_sub($name, $args, $globals) >> + +This method is called to translate a sub name to a hash of name => coderef +pairs for exporting to the caller. In general, this would just be a hash with +one key and one value, but, for example, L<Type::Library> overrides this +method so that C<< "+Foo" >> gets expanded to: + + ( + Foo => sub { $type }, + is_Foo => sub { $type->check(@_) }, + to_Foo => sub { $type->assert_coerce(@_) }, + assert_Foo => sub { $type->assert_return(@_) }, + ) + +The default implementation checks that the name is allowed to be exported +(using the C<_exporter_permitted_regexp> method), gets the coderef using +the generator if there is one (or by calling C<< can >> on your exporter +otherwise) and calls C<_exporter_fail> if it's unable to generate or +retrieve a coderef. + +=item C<< _exporter_permitted_regexp($globals) >> + +This method is called to retrieve a regexp for validating the names of +exportable subs. If a sub doesn't match the regexp, then the default +implementation of C<_exporter_expand_sub> will refuse to export it. (Of +course, you may override the default C<_exporter_expand_sub>.) + +The default implementation of this method assembles the regexp from +C<< @EXPORT >> and C<< @EXPORT_OK >>. + +=item C<< _exporter_fail($name, $args, $globals) >> + +Called by C<_exporter_expand_sub> if it can't find a coderef to export. + +The default implementation just throws an exception. But you could emit +a warning instead, or just ignore the failed export. + +If you don't throw an exception then you should be aware that this +method is called in list context, and any list it returns will be treated +as an C<_exporter_expand_sub>-style hash of names and coderefs for +export. + +=item C<< _exporter_install_sub($name, $args, $globals, $coderef) >> + +This method actually installs the exported sub into its new destination. +Its return value is ignored. + +The default implementation handles sub renaming (i.e. the C<< -as >>, +C<< -prefix >> and C<< -suffix >> functions. This method does a lot of +stuff; if you need to override it, it's probably a good idea to just +pre-process the arguments and then call the super method rather than +trying to handle all of it yourself. + +=item C<< _exporter_uninstall_sub($name, $args, $globals) >> + +The opposite of C<_exporter_install_sub>. + +=back + +=head1 DIAGNOSTICS + +=over + +=item B<< Overwriting existing sub '%s::%s' with sub '%s' exported by %s >> + +A warning issued if Exporter::Tiny is asked to export a symbol which +will result in an existing sub being overwritten. This warning can be +suppressed using either of the following: + + use MyUtils { replace => 1 }, "frobnicate"; + use MyUtils "frobnicate" => { -replace => 1 }; + +Or can be upgraded to a fatal error: + + use MyUtils { replace => "die" }, "frobnicate"; + use MyUtils "frobnicate" => { -replace => "die" }; + +=item B<< Refusing to overwrite existing sub '%s::%s' with sub '%s' exported by %s >> + +The fatal version of the above warning. + +=item B<< Could not find sub '%s' exported by %s >> + +You requested to import a sub which the package does not provide. + +=item B<< Cannot provide an -as option for tags >> + +Because a tag may provide more than one function, it does not make sense +to request a single name for it. Instead use C<< -prefix >> or C<< -suffix >>. + +=item B<< Passing options to unimport '%s' makes no sense >> + +When you import a sub, it occasionally makes sense to pass some options +for it. However, when unimporting, options do nothing, so this warning +is issued. + +=back + +=head1 HISTORY + +L<Type::Library> had a bunch of custom exporting code which poked coderefs +into its caller's stash. It needed this to be something more powerful than +most exporters so that it could switch between exporting Moose, Mouse and +Moo-compatible objects on request. L<Sub::Exporter> would have been capable, +but had too many dependencies for the Type::Tiny project. + +Meanwhile L<Type::Utils>, L<Types::TypeTiny> and L<Test::TypeTiny> each +used the venerable L<Exporter.pm|Exporter>. However, this meant they were +unable to use the features like L<Sub::Exporter>-style function renaming +which I'd built into Type::Library: + + ## import "Str" but rename it to "String". + use Types::Standard "Str" => { -as => "String" }; + +And so I decided to factor out code that could be shared by all Type-Tiny's +exporters into a single place: Exporter::TypeTiny. + +As of version 0.026, Exporter::TypeTiny was also made available as +L<Exporter::Tiny>, distributed independently on CPAN. CHOCOLATEBOY had +convinced me that it was mature enough to live a life of its own. + +As of version 0.030, Type-Tiny depends on Exporter::Tiny and +Exporter::TypeTiny is being phased out. + +=head1 OBLIGATORY EXPORTER COMPARISON + +Exporting is unlikely to be your application's performance bottleneck, but +nonetheless here are some comparisons. + +B<< Comparative sizes according to L<Devel::SizeMe>: >> + + Exporter 217.1Kb + Sub::Exporter::Progressive 263.2Kb + Exporter::Tiny 267.7Kb + Exporter + Exporter::Heavy 281.5Kb + Exporter::Renaming 406.2Kb + Sub::Exporter 701.0Kb + +B<< Performance exporting a single sub: >> + + Rate SubExp ExpTiny SubExpProg ExpPM +SubExp 2489/s -- -56% -85% -88% +ExpTiny 5635/s 126% -- -67% -72% +SubExpProg 16905/s 579% 200% -- -16% +ExpPM 20097/s 707% 257% 19% -- + +(Exporter::Renaming globally changes the behaviour of Exporter.pm, so could +not be included in the same benchmarks.) + +B<< (Non-Core) Dependencies: >> + + Exporter -1 + Exporter::Renaming 0 + Exporter::Tiny 0 + Sub::Exporter::Progressive 0 + Sub::Exporter 3 + +B<< Features: >> + + ExpPM ExpTiny SubExp SubExpProg + Can export code symbols............. Yes Yes Yes Yes + Can export non-code symbols......... Yes + Groups/tags......................... Yes Yes Yes Yes + Export by regexp.................... Yes Yes + Bang prefix......................... Yes Yes + Allows renaming of subs............. Yes Yes Maybe + Install code into scalar refs....... Yes Yes Maybe + Can be passed an "into" parameter... Yes Yes Maybe + Can be passed an "installer" sub.... Yes Yes Maybe + Config avoids package variables..... Yes + Supports generators................. Yes Yes + Sane API for generators............. Yes Yes + Unimport............................ Yes + +(Certain Sub::Exporter::Progressive features are only available if +Sub::Exporter is installed.) + +=head1 BUGS + +Please report any bugs to +L<http://rt.cpan.org/Dist/Display.html?Queue=Exporter-Tiny>. + +=head1 SUPPORT + +B<< IRC: >> support is available through in the I<< #moops >> channel +on L<irc.perl.org|http://www.irc.perl.org/channels.html>. + +=head1 SEE ALSO + +L<Exporter::Shiny>, +L<Sub::Exporter>, +L<Exporter>. + +=head1 AUTHOR + +Toby Inkster E<lt>tobyink@cpan.orgE<gt>. + +=head1 COPYRIGHT AND LICENCE + +This software is copyright (c) 2013-2014 by Toby Inkster. + +This is free software; you can redistribute it and/or modify it under +the same terms as the Perl 5 programming language system itself. + +=head1 DISCLAIMER OF WARRANTIES + +THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED +WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF +MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + |