294 lines
7.1 KiB
Perl
294 lines
7.1 KiB
Perl
package Devel::Declare::Context::Simple;
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use strict;
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use warnings;
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use Devel::Declare ();
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use B::Hooks::EndOfScope;
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use Carp qw/confess/;
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our $VERSION = '0.006022';
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$VERSION =~ tr/_//d;
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sub new {
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my $class = shift;
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bless {@_}, $class;
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}
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sub init {
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my $self = shift;
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@{$self}{ qw(Declarator Offset WarningOnRedefined) } = @_;
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return $self;
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}
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sub offset {
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my $self = shift;
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return $self->{Offset}
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}
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sub inc_offset {
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my $self = shift;
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$self->{Offset} += shift;
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}
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sub declarator {
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my $self = shift;
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return $self->{Declarator}
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}
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sub warning_on_redefine {
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my $self = shift;
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return $self->{WarningOnRedefined}
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}
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sub skip_declarator {
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my $self = shift;
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my $decl = $self->declarator;
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my $len = Devel::Declare::toke_scan_word($self->offset, 0);
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confess "Couldn't find declarator '$decl'"
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unless $len;
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my $linestr = $self->get_linestr;
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my $name = substr($linestr, $self->offset, $len);
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confess "Expected declarator '$decl', got '${name}'"
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unless $name eq $decl;
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$self->inc_offset($len);
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}
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sub skipspace {
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my $self = shift;
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$self->inc_offset(Devel::Declare::toke_skipspace($self->offset));
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}
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sub get_linestr {
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my $self = shift;
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my $line = Devel::Declare::get_linestr();
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return $line;
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}
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sub set_linestr {
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my $self = shift;
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my ($line) = @_;
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Devel::Declare::set_linestr($line);
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}
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sub strip_name {
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my $self = shift;
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$self->skipspace;
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if (my $len = Devel::Declare::toke_scan_word( $self->offset, 1 )) {
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my $linestr = $self->get_linestr();
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my $name = substr( $linestr, $self->offset, $len );
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substr( $linestr, $self->offset, $len ) = '';
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$self->set_linestr($linestr);
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return $name;
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}
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$self->skipspace;
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return;
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}
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sub strip_ident {
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my $self = shift;
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$self->skipspace;
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if (my $len = Devel::Declare::toke_scan_ident( $self->offset )) {
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my $linestr = $self->get_linestr();
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my $ident = substr( $linestr, $self->offset, $len );
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substr( $linestr, $self->offset, $len ) = '';
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$self->set_linestr($linestr);
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return $ident;
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}
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$self->skipspace;
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return;
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}
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sub strip_proto {
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my $self = shift;
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$self->skipspace;
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my $linestr = $self->get_linestr();
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if (substr($linestr, $self->offset, 1) eq '(') {
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my $length = Devel::Declare::toke_scan_str($self->offset);
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my $proto = Devel::Declare::get_lex_stuff();
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Devel::Declare::clear_lex_stuff();
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$linestr = $self->get_linestr();
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substr($linestr, $self->offset,
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defined($length) ? $length : length($linestr)) = '';
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$self->set_linestr($linestr);
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return $proto;
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}
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return;
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}
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sub strip_names_and_args {
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my $self = shift;
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$self->skipspace;
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my @args;
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my $linestr = $self->get_linestr;
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if (substr($linestr, $self->offset, 1) eq '(') {
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# We had a leading paren, so we will now expect comma separated
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# arguments
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substr($linestr, $self->offset, 1) = '';
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$self->set_linestr($linestr);
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$self->skipspace;
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# At this point we expect to have a comma-separated list of
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# barewords with optional protos afterward, so loop until we
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# run out of comma-separated values
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while (1) {
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# Get the bareword
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my $thing = $self->strip_name;
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# If there's no bareword here, bail
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confess "failed to parse bareword. found ${linestr}"
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unless defined $thing;
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$linestr = $self->get_linestr;
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if (substr($linestr, $self->offset, 1) eq '(') {
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# This one had a proto, pull it out
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push(@args, [ $thing, $self->strip_proto ]);
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} else {
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# This had no proto, so store it with an undef
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push(@args, [ $thing, undef ]);
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}
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$self->skipspace;
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$linestr = $self->get_linestr;
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if (substr($linestr, $self->offset, 1) eq ',') {
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# We found a comma, strip it out and set things up for
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# another iteration
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substr($linestr, $self->offset, 1) = '';
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$self->set_linestr($linestr);
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$self->skipspace;
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} else {
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# No comma, get outta here
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last;
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}
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}
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# look for the final closing paren of the list
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if (substr($linestr, $self->offset, 1) eq ')') {
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substr($linestr, $self->offset, 1) = '';
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$self->set_linestr($linestr);
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$self->skipspace;
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}
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else {
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# fail if it isn't there
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confess "couldn't find closing paren for argument. found ${linestr}"
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}
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} else {
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# No parens, so expect a single arg
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my $thing = $self->strip_name;
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# If there's no bareword here, bail
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confess "failed to parse bareword. found ${linestr}"
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unless defined $thing;
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$linestr = $self->get_linestr;
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if (substr($linestr, $self->offset, 1) eq '(') {
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# This one had a proto, pull it out
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push(@args, [ $thing, $self->strip_proto ]);
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} else {
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# This had no proto, so store it with an undef
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push(@args, [ $thing, undef ]);
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}
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}
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return \@args;
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}
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sub strip_attrs {
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my $self = shift;
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$self->skipspace;
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my $linestr = Devel::Declare::get_linestr;
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my $attrs = '';
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if (substr($linestr, $self->offset, 1) eq ':') {
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while (substr($linestr, $self->offset, 1) ne '{') {
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if (substr($linestr, $self->offset, 1) eq ':') {
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substr($linestr, $self->offset, 1) = '';
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Devel::Declare::set_linestr($linestr);
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$attrs .= ':';
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}
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$self->skipspace;
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$linestr = Devel::Declare::get_linestr();
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if (my $len = Devel::Declare::toke_scan_word($self->offset, 0)) {
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my $name = substr($linestr, $self->offset, $len);
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substr($linestr, $self->offset, $len) = '';
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Devel::Declare::set_linestr($linestr);
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$attrs .= " ${name}";
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if (substr($linestr, $self->offset, 1) eq '(') {
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my $length = Devel::Declare::toke_scan_str($self->offset);
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my $arg = Devel::Declare::get_lex_stuff();
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Devel::Declare::clear_lex_stuff();
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$linestr = Devel::Declare::get_linestr();
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substr($linestr, $self->offset, $length) = '';
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Devel::Declare::set_linestr($linestr);
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$attrs .= "(${arg})";
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}
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}
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}
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$linestr = Devel::Declare::get_linestr();
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}
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return $attrs;
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}
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sub get_curstash_name {
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return Devel::Declare::get_curstash_name;
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}
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sub shadow {
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my $self = shift;
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my $pack = $self->get_curstash_name;
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Devel::Declare::shadow_sub( $pack . '::' . $self->declarator, $_[0] );
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}
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sub inject_if_block {
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my $self = shift;
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my $inject = shift;
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my $before = shift || '';
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$self->skipspace;
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my $linestr = $self->get_linestr;
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if (substr($linestr, $self->offset, 1) eq '{') {
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substr($linestr, $self->offset + 1, 0) = $inject;
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substr($linestr, $self->offset, 0) = $before;
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$self->set_linestr($linestr);
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return 1;
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}
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return 0;
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}
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sub scope_injector_call {
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my $self = shift;
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my $inject = shift || '';
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return ' BEGIN { ' . ref($self) . "->inject_scope('${inject}') }; ";
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}
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sub inject_scope {
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my $class = shift;
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my $inject = shift;
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on_scope_end {
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my $linestr = Devel::Declare::get_linestr;
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return unless defined $linestr;
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my $offset = Devel::Declare::get_linestr_offset;
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substr( $linestr, $offset, 0 ) = ';' . $inject;
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Devel::Declare::set_linestr($linestr);
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};
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}
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1;
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# vi:sw=2 ts=2
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