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|
use strict;
use warnings;
use Devel::Declare ();
{
package MethodHandlers;
use strict;
use warnings;
use B::Hooks::EndOfScope;
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 {
on_scope_end {
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;
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');
done_testing;
|
