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#!/usr/bin/perl |
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package Data::Thunk::ScalarValue; |
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BEGIN { |
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$Data::Thunk::ScalarValue::AUTHORITY = 'cpan:NUFFIN'; |
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} |
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BEGIN { |
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$Data::Thunk::ScalarValue::VERSION = '0.07'; |
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} |
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use strict; |
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use warnings; |
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use Carp; |
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use Check::ISA; |
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use namespace::clean; |
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use UNIVERSAL::ref; |
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our $vivify_scalar; |
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BEGIN { |
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$vivify_scalar = sub { |
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my $self = $_[0]; |
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# must rebless to something unoverloaded in order to get at the value |
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bless $self, "Data::Thunk::NoOverload"; |
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my $val = $$self; |
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bless $self, __PACKAGE__; |
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# try to replace the container with the value wherever we found it |
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local $@; |
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eval { $_[0] = $val }; # might be readonly; |
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$val; |
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}; |
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} |
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use overload ( |
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fallback => 1, map { |
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$_ => $vivify_scalar, |
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} qw( bool "" 0+ ${} @{} %{} &{} *{} ) |
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); |
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sub ref { |
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CORE::ref($_[0]->$vivify_scalar()); |
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} |
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sub AUTOLOAD { |
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my ( $method ) = ( our $AUTOLOAD =~ /([^:]+)$/ ); |
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$_[0]->$vivify_scalar(); |
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unshift @_, $method; |
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goto $Data::Thunk::Code::call_method; |
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} |
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sub DESTROY { } |
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1; |
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__END__ |