NAME Devel::Declare - SYNOPSIS use Devel::Declare (); use Scope::Guard; { package MethodHandlers; use strict; use warnings; our ($Declarator, $Offset); sub skip_declarator { $Offset += Devel::Declare::toke_move_past_token($Offset); } sub skipspace { $Offset += Devel::Declare::toke_skipspace($Offset); } sub strip_name { skipspace; if (my $len = Devel::Declare::toke_scan_word($Offset, 1)) { my $linestr = Devel::Declare::get_linestr(); my $name = substr($linestr, $Offset, $len); substr($linestr, $Offset, $len) = ''; Devel::Declare::set_linestr($linestr); return $name; } return; } sub strip_proto { skipspace; my $linestr = Devel::Declare::get_linestr(); if (substr($linestr, $Offset, 1) eq '(') { my $length = Devel::Declare::toke_scan_str($Offset); my $proto = Devel::Declare::get_lex_stuff(); Devel::Declare::clear_lex_stuff(); $linestr = Devel::Declare::get_linestr(); substr($linestr, $Offset, $length) = ''; Devel::Declare::set_linestr($linestr); return $proto; } return; } sub shadow { my $pack = Devel::Declare::get_curstash_name; Devel::Declare::shadow_sub("${pack}::${Declarator}", $_[0]); } # undef -> my ($self) = shift; # '' -> my ($self) = @_; # '$foo' -> my ($self, $foo) = @_; sub make_proto_unwrap { my ($proto) = @_; my $inject = 'my ($self'; if (defined $proto) { $inject .= ", $proto" if length($proto); $inject .= ') = @_; '; } else { $inject .= ') = shift;'; } return $inject; } sub inject_if_block { my $inject = shift; skipspace; my $linestr = Devel::Declare::get_linestr; if (substr($linestr, $Offset, 1) eq '{') { substr($linestr, $Offset+1, 0) = $inject; Devel::Declare::set_linestr($linestr); } } sub scope_injector_call { return ' BEGIN { MethodHandlers::inject_scope }; '; } sub parser { local ($Declarator, $Offset) = @_; skip_declarator; my $name = strip_name; my $proto = strip_proto; my $inject = make_proto_unwrap($proto); if (defined $name) { $inject = scope_injector_call().$inject; } inject_if_block($inject); if (defined $name) { $name = join('::', Devel::Declare::get_curstash_name(), $name) unless ($name =~ /::/); shadow(sub (&) { no strict 'refs'; *{$name} = shift; }); } else { shadow(sub (&) { shift }); } } sub inject_scope { $^H |= 0x120000; $^H{DD_METHODHANDLERS} = Scope::Guard->new(sub { my $linestr = Devel::Declare::get_linestr; my $offset = Devel::Declare::get_linestr_offset; substr($linestr, $offset, 0) = ';'; Devel::Declare::set_linestr($linestr); }); } } my ($test_method1, $test_method2, @test_list); { package DeclareTest; sub method (&); BEGIN { Devel::Declare->setup_for( __PACKAGE__, { method => { const => \&MethodHandlers::parser } } ); } method new { my $class = ref $self || $self; return bless({ @_ }, $class); } method foo ($foo) { return (ref $self).': Foo: '.$foo; } method upgrade(){ # no spaces to make case pathological bless($self, 'DeclareTest2'); } method DeclareTest2::bar () { return 'DeclareTest2: bar'; } $test_method1 = method { return join(', ', $self->{attr}, $_[1]); }; $test_method2 = method ($what) { return join(', ', ref $self, $what); }; method main () { return "main"; } @test_list = (method { 1 }, sub { 2 }, method () { 3 }, sub { 4 }); } use Test::More 'no_plan'; my $o = DeclareTest->new(attr => "value"); isa_ok($o, 'DeclareTest'); is($o->{attr}, 'value', '@_ args ok'); is($o->foo('yay'), 'DeclareTest: Foo: yay', 'method with argument ok'); is($o->main, 'main', 'declaration of package named method ok'); $o->upgrade; isa_ok($o, 'DeclareTest2'); is($o->bar, 'DeclareTest2: bar', 'absolute method declaration ok'); is($o->$test_method1('no', 'yes'), 'value, yes', 'anon method with @_ ok'); is($o->$test_method2('this'), 'DeclareTest2, this', 'anon method with proto ok'); is_deeply([ map { $_->() } @test_list ], [ 1, 2, 3, 4], 'binding ok'); (this is t/method-no-semi.t in this distribution) DESCRIPTION setup_for Devel::Declare->setup_for( $package, { $name => { $op_type => $sub } } ); Currently valid op types: 'check', 'rv2cv' AUTHORS Matt S Trout - Company: http://www.shadowcat.co.uk/ Blog: http://chainsawblues.vox.com/ Florian Ragwitz LICENSE This library is free software under the same terms as perl itself