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lib/Acme/Backwards.pm  view on Meta::CPAN

package Acme::Backwards; 
our $VERSION = '1.01';
use Keyword::Declare;
sub import {
	keytype OKAY is m{(?:fisle (?&PerlNWS)(?&PerlExpression).*?;|esle (?&PerlNWS).*?;)?+}xms;
	keyword rof (/(my\s*\$\w+)?/ $declare, Expr $test, /.+?;$/ $code) {_backwards('for', ($declare ? $declare : ()), $test, $code);};
	keyword fi (Expr $test, /.+?;/ $code, OKAY @next) {_backwards('if', $test, $code)._process_backwards(@next);};
	keyword sselnu (Expr $test, /.+?;/ $code, OKAY @next) {_backwards('unless', $test, $code)._process_backwards(@next);};
}
sub _process_backwards {join' ',map{$_=~m/(fisle|esle)(.*)$/;return"_$1"->($2)}@_;}
sub _esle {_backwards('else','',shift)}
sub _fisle {shift=~m/\s*((?&PerlExpression))\s*(.*?;) $PPR::GRAMMAR/gxm;_backwards('elsif', $1, $2);}
sub _backwards {scalar@_>3?sprintf"%s %s %s { %s }",@_:sprintf"%s %s { %s }",@_;}

1;

__END__

=head1 NAME