package Function::Parameters;
+use v5.14.0;
+
use strict;
use warnings;
-our $VERSION = '0.05';
-
-use Carp qw(croak confess);
-use Devel::Declare;
-use B::Hooks::EndOfScope;
-
-our @CARP_NOT = qw(Devel::Declare);
-
-
-# Make our import chainable so a wrapper module that wants to turn on F:P
-# for its users can just say
-# sub import { Function::Parameters->import; }
-#
-# To make that possible we skip all subs named 'import' in our search for the
-# target package.
-#
-sub guess_caller {
- my ($start) = @_;
- $start ||= 1;
+use Carp qw(confess);
- my $defcaller = (caller $start)[0];
- my $caller = $defcaller;
-
- for (my $level = $start; ; ++$level) {
- my ($pkg, $function) = (caller $level)[0, 3] or last;
- $function =~ /::import\z/ or return $caller;
- $caller = $pkg;
- }
- $defcaller
+use XSLoader;
+BEGIN {
+ our $VERSION = '0.06_01';
+ XSLoader::load;
}
-
sub _assert_valid_identifier {
my ($name, $with_dollar) = @_;
my $bonus = $with_dollar ? '\$' : '';
or confess qq{"$name" doesn't look like a valid identifier};
}
-# Parse import spec and make shit happen.
-#
+sub _assert_valid_attributes {
+ my ($attrs) = @_;
+ $attrs =~ /^\s*:\s*[^\W\d]\w*\s*(?:(?:\s|:\s*)[^\W\d]\w*\s*)*(?:\(|\z)/
+ or confess qq{"$attrs" doesn't look like valid attributes};
+}
+
my @bare_arms = qw(function method);
my %type_map = (
- function => { name => 'optional' },
- method => { name => 'optional', shift => '$self' },
+ function => {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ },
+ method => {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ attrs => ':method',
+ shift => '$self',
+ },
+ classmethod => {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ attributes => ':method',
+ shift => '$class',
+ },
);
+for my $k (keys %type_map) {
+ $type_map{$k . '_strict'} = {
+ %{$type_map{$k}},
+ check_argument_count => 1,
+ };
+}
-sub import_into {
- my $victim = shift;
+sub import {
+ my $class = shift;
- @_ or @_ = ('fun', 'method');
+ @_ or @_ = {
+ fun => 'function',
+ method => 'method',
+ };
if (@_ == 1 && ref($_[0]) eq 'HASH') {
@_ = map [$_, $_[0]{$_}], keys %{$_[0]}
or return;
? $proto
: [$proto, $bare_arms[$bare++] || confess(qq{Don't know what to do with "$proto"})]
;
- my ($name, $type) = @$item;
+ my ($name, $proto_type) = @$item;
_assert_valid_identifier $name;
- unless (ref $type) {
- # use '||' instead of 'or' to preserve $type in the error message
- $type = $type_map{$type}
- || confess qq["$type" doesn't look like a valid type (one of ${\join ', ', sort keys %type_map})];
+ unless (ref $proto_type) {
+ # use '||' instead of 'or' to preserve $proto_type in the error message
+ $proto_type = $type_map{$proto_type}
+ || confess qq["$proto_type" doesn't look like a valid type (one of ${\join ', ', sort keys %type_map})];
}
- $type->{name} ||= 'optional';
- $type->{name} =~ /^(?:optional|required|prohibited)\z/
- or confess qq["$type->{name}" doesn't look like a valid name attribute (one of optional, required, prohibited)];
-
- $spec{$name} = {const => mk_parse($type)};
- }
-
- Devel::Declare->setup_for($victim, \%spec);
- for my $name (keys %spec) {
- no strict 'refs';
- *{$victim . '::' . $name} = \&_declarator;
- }
-}
-
-sub import {
- my $class = shift;
- my $caller = guess_caller;
- import_into $caller, @_;
-}
-
-sub _declarator {
- $_[0]
-}
-
-
-# Wrapper around substr where param 3 is an end offset, not a length.
-#
-sub _substring {
- @_ >= 4
- ? substr $_[0], $_[1], $_[2] - $_[1], $_[3]
- : substr $_[0], $_[1], $_[2] - $_[1]
-}
-sub _skip_space {
- my ($ctx, $key) = @_;
- my $cur = my $start = $ctx->{offset};
- while (my $d = Devel::Declare::toke_skipspace $cur) {
- $cur += $d;
- }
- $ctx->{space}{$key} .= _substring Devel::Declare::get_linestr, $start, $cur if $key;
- $ctx->{offset} = $cur;
-}
+ my %type = %$proto_type;
+ my %clean;
-sub _grab_name {
- my ($ctx) = @_;
- my $p = $ctx->{offset};
- my $namlen = Devel::Declare::toke_scan_word $p, !!'handle_package'
- or return;
- my $str = Devel::Declare::get_linestr;
- $ctx->{name} = substr $str, $p, $namlen;
- $ctx->{offset} += $namlen;
- _skip_space $ctx, 'name';
-}
+ $clean{name} = delete $type{name} || 'optional';
+ $clean{name} =~ /^(?:optional|required|prohibited)\z/
+ or confess qq["$clean{name}" doesn't look like a valid name attribute (one of optional, required, prohibited)];
-sub _grab_params {
- my ($ctx) = @_;
- substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq '('
- or return;
- $ctx->{offset}++;
- _skip_space $ctx, 'params';
-
- my $pcount = 0;
-
- LOOP: {
- my $c = substr Devel::Declare::get_linestr, $ctx->{offset}, 1;
-
- if ($c =~ /^[\$\@%]\z/) {
- $ctx->{offset}++;
- _skip_space $ctx, "params_$pcount";
- my $namlen = Devel::Declare::toke_scan_word $ctx->{offset}, !'handle_package'
- or croak "Missing identifier";
- my $name = substr Devel::Declare::get_linestr, $ctx->{offset}, $namlen;
- $ctx->{params} .= $c . $name . ',';
- $ctx->{offset} += $namlen;
- _skip_space $ctx, "params_$pcount";
-
- $c = substr Devel::Declare::get_linestr, $ctx->{offset}, 1;
- if ($c eq ',') {
- $ctx->{offset}++;
- _skip_space $ctx, "params_$pcount";
- $pcount++;
- redo LOOP;
- }
- }
+ $clean{shift} = delete $type{shift} || '';
+ _assert_valid_identifier $clean{shift}, 1 if $clean{shift};
- if ($c eq ')') {
- $ctx->{offset}++;
- _skip_space $ctx, 'params';
- return;
- }
+ $clean{attrs} = join ' ', map delete $type{$_} || (), qw(attributes attrs);
+ _assert_valid_attributes $clean{attrs} if $clean{attrs};
+
+ $clean{default_arguments} =
+ exists $type{default_arguments}
+ ? !!delete $type{default_arguments}
+ : 1
+ ;
+ $clean{check_argument_count} = !!delete $type{check_argument_count};
- if ($c eq '') {
- croak "Unexpected EOF in parameter list";
- }
+ %type and confess "Invalid keyword property: @{[keys %type]}";
- croak "Unexpected '$c' in parameter list";
+ $spec{$name} = \%clean;
}
-}
-
-sub _parse_parens {
- my ($ctx) = @_;
-
- my $strlen = Devel::Declare::toke_scan_str $ctx->{offset};
- $strlen == 0 || $strlen == -1 and return;
-
- $strlen < 0 and confess "Devel::Declare::toke_scan_str done fucked up ($strlen); see https://rt.cpan.org/Ticket/Display.html?id=51679";
-
- my $str = Devel::Declare::get_lex_stuff;
- Devel::Declare::clear_lex_stuff;
-
- $ctx->{offset} += $strlen;
-
- $str
-}
-
-sub _grab_proto {
- my ($ctx) = @_;
-
- my $savepos = $ctx->{offset};
-
- substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq ':'
- or return;
- $ctx->{offset}++;
- _skip_space $ctx, 'proto_tmp';
+
+ for my $kw (keys %spec) {
+ my $type = $spec{$kw};
- unless (substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq '(') {
- $ctx->{offset} = $savepos;
- delete $ctx->{space}{proto_tmp};
- return;
+ my $flags =
+ $type->{name} eq 'prohibited' ? FLAG_ANON_OK :
+ $type->{name} eq 'required' ? FLAG_NAME_OK :
+ FLAG_ANON_OK | FLAG_NAME_OK
+ ;
+ $flags |= FLAG_DEFAULT_ARGS if $type->{default_arguments};
+ $flags |= FLAG_CHECK_NARGS if $type->{check_argument_count};
+ $^H{HINTK_FLAGS_ . $kw} = $flags;
+ $^H{HINTK_SHIFT_ . $kw} = $type->{shift};
+ $^H{HINTK_ATTRS_ . $kw} = $type->{attrs};
+ $^H{+HINTK_KEYWORDS} .= "$kw ";
}
- $_->{proto} .= delete $_->{proto_tmp} for $ctx->{space};
-
- defined(my $str = _parse_parens $ctx)
- or croak "Malformed prototype";
- $ctx->{proto} = $str;
-
- _skip_space $ctx, 'proto';
}
-sub _grab_attr {
- my ($ctx) = @_;
-
- my $pcount = 0;
+sub unimport {
+ my $class = shift;
- if (substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq ':') {
- $ctx->{offset}++;
- _skip_space $ctx, "attr_$pcount";
- } elsif (!defined $ctx->{proto}) {
+ if (!@_) {
+ delete $^H{+HINTK_KEYWORDS};
return;
}
- while () {
- my $namlen = Devel::Declare::toke_scan_word $ctx->{offset}, !'handle_package'
- or return;
- $ctx->{attr} .= substr Devel::Declare::get_linestr, $ctx->{offset}, $namlen;
- $ctx->{offset} += $namlen;
- _skip_space $ctx, "attr_$pcount";
- if (substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq '(') {
- defined(my $str = _parse_parens $ctx)
- or croak "Malformed attribute argument list";
- $ctx->{attr} .= "($str)";
- _skip_space $ctx, "attr_$pcount";
- }
- $pcount++;
-
- if (substr(Devel::Declare::get_linestr, $ctx->{offset}, 1) eq ':') {
- $ctx->{offset}++;
- _skip_space $ctx, "attr_$pcount";
- }
- }
-}
-
-# IN:
-# fun name (params) :(proto) :attr { ... }
-# OUT:
-# fun (do { sub (proto) :attr { self? my (params) = @_; ... } })
-# fun (do { sub name (proto); sub name (proto) :attr { self? my (params) = @_; ... } });
-#
-sub _generate {
- my ($ctx, $declarator, $shift) = @_;
-
- my $gen = '(do{sub';
-
- my $skipped = join '', values %{$ctx->{space}};
- my $lines = $skipped =~ tr/\n//;
- $gen .= "\n" x $lines;
-
- my $proto = defined $ctx->{proto} ? "($ctx->{proto})" : '';
-
- my $is_stmt = 0;
- if (defined(my $name = $ctx->{name})) {
- $is_stmt = 1;
- $gen .= " $name$proto;";
- $gen .= "sub $name";
+ for my $kw (@_) {
+ $^H{+HINTK_KEYWORDS} =~ s/(?<![^ ])\Q$kw\E //g;
}
-
- $gen .= $proto;
-
- if (defined $ctx->{attr}) {
- $gen .= ":$ctx->{attr}";
- }
-
- $gen .= '{';
- $gen .= "BEGIN{${\__PACKAGE__}::_fini($is_stmt)}";
-
- if ($shift) {
- _assert_valid_identifier $shift, 1;
- $gen .= "my$shift=shift;";
- }
- if (defined $ctx->{params}) {
- $gen .= "my($ctx->{params})=\@_;";
- }
- $gen
}
-sub mk_parse {
- my ($spec) = @_;
-
- sub {
- my ($declarator, $offset_orig) = @_;
- my $ctx = {
- offset => $offset_orig,
- space => {},
- };
-
- $ctx->{offset} += Devel::Declare::toke_move_past_token($ctx->{offset});
- _skip_space $ctx;
-
- my $start = $ctx->{offset};
-
- _grab_name $ctx unless $spec->{name} eq 'prohibited';
- $ctx->{name} or croak qq[I was expecting a function name, not "${\substr Devel::Declare::get_linestr, $ctx->{offset}}"] if $spec->{name} eq 'required';
- _grab_params $ctx;
- _grab_proto $ctx;
- _grab_attr $ctx;
-
- my $offset = $ctx->{offset};
-
- my $linestr = Devel::Declare::get_linestr;
- substr($linestr, $offset, 1) eq '{'
- or croak qq[I was expecting a function body, not "${\substr $linestr, $offset}"];
-
- my $gen = _generate $ctx, $declarator, $spec->{shift};
- my $oldlen = $offset + 1 - $start;
- _substring $linestr, $start, $offset + 1, (' ' x $oldlen) . $gen;
- Devel::Declare::set_linestr $linestr;
- }
-}
-
-# Patch in the end of our synthetic 'do' block, close argument list, and
-# optionally terminate the statement.
-#
-sub _fini {
- my ($stmt) = @_;
- on_scope_end {
- my $off = Devel::Declare::get_linestr_offset;
- my $str = Devel::Declare::get_linestr;
- substr $str, $off, 0, '})' . ($stmt ? ';' : '');
- Devel::Declare::set_linestr $str;
- };
-}
'ok'
__END__
+=encoding UTF-8
+
=head1 NAME
Function::Parameters - subroutine definitions with parameter lists
use Function::Parameters;
+ # simple function
fun foo($bar, $baz) {
return $bar + $baz;
}
+ # function with prototype
fun mymap($fun, @args) :(&@) {
my @res;
for (@args) {
print "$_\n" for mymap { $_ * 2 } 1 .. 4;
+ # method with implicit $self
method set_name($name) {
$self->{name} = $name;
}
+ # function with default arguments
+ fun search($haystack, $needle = qr/^(?!)/, $offset = 0) {
+ ...
+ }
+
+ # method with default arguments
+ method skip($amount = 1) {
+ $self->{position} += $amount;
+ }
+
=cut
=pod
- use Function::Parameters 'proc', 'meth';
+ # use different keywords
+ use Function::Parameters {
+ proc => 'function',
+ meth => 'method',
+ };
my $f = proc ($x) { $x * 2 };
meth get_age() {
=head1 DESCRIPTION
This module lets you use parameter lists in your subroutines. Thanks to
-L<Devel::Declare> it works without source filters.
+L<PL_keyword_plugin|perlapi/PL_keyword_plugin> it works without source filters.
-WARNING: This is my first attempt at using L<Devel::Declare> and I have
+WARNING: This is my first attempt at writing L<XS code|perlxs> and I have
almost no experience with perl's internals. So while this module might
appear to work, it could also conceivably make your programs segfault.
Consider this module alpha quality.
The effect of C<fun foo($bar, $baz) {> is as if you'd written
C<sub foo { my ($bar, $baz) = @_; >, i.e. the parameter list is simply
-copied into C<my> and initialized from L<@_|perlvar/"@_">.
+copied into L<my|perlfunc/my-EXPR> and initialized from L<@_|perlvar/"@_">.
In addition you can use C<method>, which understands the same syntax as C<fun>
but automatically creates a C<$self> variable for you. So by writing
=head2 Customizing the generated keywords
-You can customize the names of the keywords injected in your package. To do that
-you pass a hash reference in the import list:
+You can customize the names of the keywords injected into your scope. To do
+that you pass a reference to a hash mapping keywords to types in the import
+list:
+
+ use Function::Parameters {
+ KEYWORD1 => TYPE1,
+ KEYWORD2 => TYPE2,
+ ...
+ };
+
+Or more concretely:
use Function::Parameters { proc => 'function', meth => 'method' }; # -or-
use Function::Parameters { proc => 'function' }; # -or-
- use Function::Parameters { meth => 'method' };
+ use Function::Parameters { meth => 'method' }; # etc.
The first line creates two keywords, C<proc> and C<meth> (for defining
functions and methods, respectively). The last two lines only create one
-keyword. Generally the hash keys can be any identifiers you want while the
-values have to be either C<function> or C<method>. The difference between
-C<function> and C<method> is that C<method>s automatically
-L<shift|perlfunc/shift> their first argument into C<$self>.
+keyword. Generally the hash keys (keywords) can be any identifiers you want
+while the values (types) have to be either a hash reference (see below) or
+C<'function'>, C<'method'>, C<'classmethod'>, C<'function_strict'>,
+C<'method_strict'>, or C<'classmethod_strict'>. The main difference between
+C<'function'> and C<'method'> is that C<'method'>s automatically
+L<shift|perlfunc/shift> their first argument into C<$self> (C<'classmethod'>s
+are similar but shift into C<$class>).
The following shortcuts are available:
=pod
+The following shortcuts are deprecated and may be removed from a future version
+of this module:
+
+ # DEPRECATED
use Function::Parameters 'foo';
# is equivalent to #
use Function::Parameters { 'foo' => 'function' };
=pod
+ # DEPRECATED
use Function::Parameters 'foo', 'bar';
# is equivalent to #
use Function::Parameters { 'foo' => 'function', 'bar' => 'method' };
-=head2 Other advanced stuff
+That is, if you want to pass arguments to L<Function::Parameters>, use a
+hashref, not a list of strings.
+
+You can customize the properties of the generated keywords even more by passing
+a hashref instead of a string. This hash can have the following keys:
+
+=over
+
+=item C<name>
+
+Valid values: C<optional> (default), C<required> (all uses of this keyword must
+specify a function name), and C<prohibited> (all uses of this keyword must not
+specify a function name). This means a C<< name => 'prohibited' >> keyword can
+only be used for defining anonymous functions.
+
+=item C<shift>
+
+Valid values: strings that look like a scalar variable. Any function created by
+this keyword will automatically L<shift|perlfunc/shift> its first argument into
+a local variable whose name is specified here.
+
+=item C<attributes>, C<attrs>
+
+Valid values: strings that are valid source code for attributes. Any value
+specified here will be inserted as a subroutine attribute in the generated
+code. Thus:
+
+ use Function::Parameters { sub_l => { attributes => ':lvalue' } };
+ sub_l foo() {
+ ...
+ }
+
+turns into
+
+ sub foo :lvalue {
+ ...
+ }
+
+It is recommended that you use C<attributes> in new code but C<attrs> is also
+accepted for now.
+
+=item C<default_arguments>
+
+Valid values: booleans. This property is on by default, so you have to pass
+C<< default_arguments => 0 >> to turn it off. If it is disabled, using C<=> in
+a parameter list causes a syntax error. Otherwise it lets you specify
+default arguments directly in the parameter list:
+
+ fun foo($x, $y = 42, $z = []) {
+ ...
+ }
+
+turns into
+
+ sub foo {
+ my ($x, $y, $z) = @_;
+ $y = 42 if @_ < 2;
+ $z = [] if @_ < 3;
+ ...
+ }
+
+You can even refer to previous parameters in the same parameter list:
+
+ print fun ($x, $y = $x + 1) { "$x and $y" }->(9); # "9 and 10"
+
+This also works with the implicit first parameter of methods:
+
+ method scale($factor = $self->default_factor) {
+ $self->{amount} *= $factor;
+ }
+
+=item C<check_argument_count>
+
+Valid values: booleans. This property is off by default. If it is enabled, the
+generated code will include checks to make sure the number of passed arguments
+is correct (and otherwise throw an exception via L<Carp::croak|Carp>):
+
+ fun foo($x, $y = 42, $z = []) {
+ ...
+ }
+
+turns into
+
+ sub foo {
+ Carp::croak "Not enough arguments for fun foo" if @_ < 1;
+ Carp::croak "Too many arguments for fun foo" if @_ > 3;
+ my ($x, $y, $z) = @_;
+ $y = 42 if @_ < 2;
+ $z = [] if @_ < 3;
+ ...
+ }
+
+=back
+
+Plain C<'function'> is equivalent to:
+
+ {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ }
+
+(These are all default values so C<'function'> is also equivalent to C<{}>.)
+
+C<'function_strict'> is like C<'function'> but with
+C<< check_argument_count => 1 >>.
+
+C<'method'> is equivalent to:
+
+ {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ attributes => ':method',
+ shift => '$self',
+ }
+
+C<'method_strict'> is like C<'method'> but with
+C<< check_argument_count => 1 >>.
+
+C<'classmethod'> is equivalent to:
+
+ {
+ name => 'optional',
+ default_arguments => 1,
+ check_argument_count => 0,
+ attributes => ':method',
+ shift => '$class',
+ }
+
+C<'classmethod_strict'> is like C<'classmethod'> but with
+C<< check_argument_count => 1 >>.
+
+=head2 Syntax and generated code
Normally, Perl subroutines are not in scope in their own body, meaning the
-parser doesn't know the name C<foo> or its prototype while processing
-C<sub foo ($) { foo $bar[1], $bar[0]; }>, parsing it as
+parser doesn't know the name C<foo> or its prototype while processing the body
+of C<sub foo ($) { foo $bar[1], $bar[0]; }>, parsing it as
C<$bar-E<gt>foo([1], $bar[0])>. Yes. You can add parens to change the
interpretation of this code, but C<foo($bar[1], $bar[0])> will only trigger
a I<foo() called too early to check prototype> warning. This module attempts
-to fix all of this by adding a subroutine declaration before the definition,
+to fix all of this by adding a subroutine declaration before the function body,
so the parser knows the name (and possibly prototype) while it processes the
body. Thus C<fun foo($x) :($) { $x }> really turns into
-C<sub foo ($); sub foo ($) { my ($x) = @_; $x }>.
+C<sub foo ($) { sub foo ($); my ($x) = @_; $x }>.
-If you need L<subroutine attributes|perlsub/"Subroutine Attributes">, you can
+If you need L<subroutine attributes|perlsub/Subroutine-Attributes>, you can
put them after the parameter list with their usual syntax.
Syntactically, these new parameter lists live in the spot normally occupied
by L<prototypes|perlsub/"Prototypes">. However, you can include a prototype by
specifying it as the first attribute (this is syntactically unambiguous
-because normal attributes have to start with a letter).
+because normal attributes have to start with a letter while a prototype starts
+with C<(>).
-If you want to wrap C<Function::Parameters>, you may find C<import_into>
-helpful. It lets you specify a target package for the syntax magic, as in:
+As an example, the following declaration uses every available feature
+(subroutine name, parameter list, default arguments, prototype, default
+attributes, attributes, argument count checks, and implicit C<$self>):
- package Some::Wrapper;
- use Function::Parameters ();
- sub import {
- my $caller = caller;
- Function::Parameters::import_into $caller;
- # or Function::Parameters::import_into $caller, @other_import_args;
- }
+ method foo($x, $y, $z = sqrt 5) :($$$;$) :lvalue :Banana(2 + 2) {
+ ...
+ }
-C<import_into> is not exported by this module, so you have to use a fully
-qualified name to call it.
+And here's what it turns into:
+
+ sub foo ($$$;$) :method :lvalue :Banana(2 + 2) {
+ sub foo ($$$;$);
+ Carp::croak "Not enough arguments for method foo" if @_ < 2;
+ Carp::croak "Too many arguments for method foo" if @_ > 4;
+ my $self = shift;
+ my ($x, $y, $z) = @_;
+ $z = sqrt 5 if @_ < 3;
+ ...
+ }
+
+Another example:
+
+ my $coderef = fun ($p, $q) :(;$$)
+ :lvalue
+ :Gazebo((>:O)) {
+ ...
+ };
+
+And the generated code:
+
+ my $coderef = sub (;$$) :lvalue :Gazebo((>:O)) {
+ # vvv only if check_argument_count is enabled vvv
+ Carp::croak "Not enough arguments for fun (anon)" if @_ < 2;
+ Carp::croak "Too many arguments for fun (anon)" if @_ > 2;
+ # ^^^ ^^^
+ my ($p, $q) = @_;
+ ...
+ };
+
+=head2 Wrapping Function::Parameters
+
+If you want to wrap L<Function::Parameters>, you just have to call its
+C<import> method. It always applies to the file that is currently being parsed
+and its effects are L<lexical|perlpragma> (i.e. it works like L<warnings> or
+L<strict>).
+
+ package Some::Wrapper;
+ use Function::Parameters ();
+ sub import {
+ Function::Parameters->import;
+ # or Function::Parameters->import(@custom_import_args);
+ }
=head1 AUTHOR
=head1 COPYRIGHT & LICENSE
-Copyright 2010, 2011 Lukas Mai.
+Copyright 2010, 2011, 2012 Lukas Mai.
This program is free software; you can redistribute it and/or modify it
under the terms of either: the GNU General Public License as published