Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
You could decouple the parsing and building steps, as nothingmuch suggested:
sub parse_brackets { my @out; foreach my $line ( @_ ) { $line_no ++; $line =~ s/\A\s+//; $line =~ s/\s+\Z//; if ( $line !~ /\S/ ) { next; } elsif ( $line =~ s/\s*\{$// ) { push @out, 'open' => [ split ' ', $line ]; } elsif ( $line eq '}' ) { push @out, 'close' => 1; } else { push @out, 'line' => $line; } } return @out; } sub build_brackets { my @parse; my @stack = \@parse; while ( scalar @_ ) { my ( $type, $value ) = splice( @_, 0, 2 ); if ( $type eq 'open' ) { my %node = ( type => shift(@$value), ( @$value ? ( name => shift +(@$value) ) : () ) ); push @{ $stack[0] }, \%node; unshift @stack, do { $node{contents} = [] }; } elsif ( $type eq 'close' ) { shift @stack; scalar @stack or die("Too many right brackets"); } else { push @{ $stack[0] }, $value; } } scalar @stack == 1 or die("Too few right brackets"); return @parse; } use Data::Dumper; print Dumper( build_brackets( parse_brackets( @lines ) ) );

I'm not sure this is a big win for your case, but if you need the extra flexiblity...


In reply to Re^3: Parsing a macro language by simonm
in thread Parsing a macro language by bluetrust

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (3)
As of 2023-01-29 09:50 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?