NAME

Syntax::Highlight::Perl6 - Perl 6 Syntax Highlighter

SYNOPSIS

### NOTE: This is needed and will be removed in future releases
use STD;
use Syntax::Highlight::Perl6;

# Creates the Perl6 syntax highlighter object
my $p = Syntax::Highlight::Perl6->new(
    text => 'my $foo;'
);

# Prints html that can be embedded in your pages
print $p->snippet_html;

# Prints html with css (useful for full pages)
print $p->simple_html;

# Prints html that has a JavaScript node viewer
print $p->full_html;

# Prints ANSI escaped color sequences (useful for console and IRC output)
print $p->ansi_text;

# Prints an array of token records (useful for other libraries)
print $p->tokens;

# Prints VIM-generated syntax highlighted html
use Text::VimColor;     # This is only needed if you need
print $p->vim_html;     # to call this method

DESCRIPTION

Syntax::Highlight::Perl6 parses Perl 6 source code using an embedded STD.pm. It matches parse tree nodes to colors then returns them in different output formats. It can be used to create web pages with colorful source code samples in its simple and snippet html modes, or it can be used as a learning tool in examining STD.pm's output using the JavaScript node viewer in its full html mode. Or you can use its parse tree Perl 5 records to build your next great idea.

The available output formats are:

• HTML (snippet,simple and full)

• ANSI escaped color sequences

• Perl 5 array of parse trees

SUBROUTINES/METHODS

This is an object-oriented module. The following methods are available:

new(options)

Returns the syntax highlighting object. It needs a hash of options. The following options are available:

• text

  This is a required option. This is where you should provide the Perl 6 code.

• rule

  parse rule name for STD.pm to parse against (default: comp_unit)

• inline_resources

  Flag to enable/disable CSS/JavaScript HTML inlining. (default: 0 (Disabled))

• resource_url

  HTML resource url that will be appended when resource inlining is disabled.

• page_title

  HTML page title for simple_html and full_html (default: q{})

• utf8_decode

  Flag to enable/disable utf8 decoding. (default: 1 (Enabled))

snippet_html

Returns the Perl 6 highlighted HTML string that can be embedded. No CSS or JavaScript is inside.

simple_html

Returns the Perl 6 highlighted HTML string. The HTML code is the same as full_html but lacks a JavaScript Parse Tree Viewer.

full_html

Returns the Perl 6 highlighted HTML string. The HTML consists of a JavaScript Parse Tree Viewer along with CSS-styling. It can inlined if inline_resources option is 1.

ansi_text

Returns a Perl highlighted ANSI escape color string.

tokens

Returns an array of hashes containing parsed token records. The hash record is structured as:

+-----------+---------+-----------+------------+---------+
| Matched   | Matched | Matched   | Parse tree | Matched |
| Last      | string  | rule      | separated  | Line    |
| Position  | buffer  | name      | by spaces  | Number  |
|           |         |           |            |         |
| $last_pos | $buffer | $rule     | $tree      | $lineno |
+-----------+---------+-----------+------------+---------+

An example of the tokens method in action:

use Data::Dumper;
print Dumper($p->tokens);

The shortened output looks like:

$VAR1 = {
  'tree' => '',
  'rule' => 0,
  'buffer' => '',
  'last_pos' => 0
};
$VAR2 = {
  'tree' => 'statementlist statement statement_modexpr statement_expr EXPR termish noun value number integer ',
  'rule' => 'number',
  'buffer' => '1',
  'last_pos' => 1
};
$VAR3 = {
  'tree' => 'statementlist eat_terminator ',
  'rule' => 0,
  'buffer' => ';',
  'last_pos' => 2
};

vim_html

Returns the Perl 6 highlighted HTML string that was generated using VIM's excellent syntax coloring engine. Please remember to copy perl6.vim to your ~/.vim/syntax.

NOTE: This method needs VIM to work properly along with Text::VimColor.

INCOMPATIBILITIES

This module is dependent on Perl 5.10 features namely the regex engine and state variables (for STD.pm). So Perl 5.8.x support will NOT be available for now.

SEE ALSO

Text::VimColor

Discussion about this module and STD.pm is usually in #perl6 (irc://irc.freenode.net/perl6). This module lives in http://svn.pugscode.org/pugs/misc/Syntax-Highlight-Perl6 . Larry Wall's STD.pm lives in http://svn.pugscode.org/pugs/src/perl6 . perl6.vim lives in http://svn.pugscode.org/pugs/util/perl6.vim .

BUGS AND LIMITATIONS

If you find any bugs, please submit them to http://rt.cpan.org/NoAuth/Bugs.html?Dist=Syntax::Highlight::Perl6. Thanks.

These are the bugs that i am currently aware of:

• Can't call method "bless" on an undefined value at STD.pm line 5269.

  You have to put "use STD;" before using this module.

  use STD; # this must be first for now
  use Syntax::Highlight::Perl6;

• Directory 'lex' is created when using this module.

  STD.pm caches digraphs and the matched rules in there. So this is Pretty Voodoo Stuff. Otherwise it will be pretty slow.

• Slow startup when using the module for the first time

  That is related to the creation of the cached 'lex'ing directory by STD.pm. This happens only once.

AUTHOR

Written by Ahmad M. Zawawi <ahmad.zawawi at gmail.com> (azawawi in #perl6).

The project idea was inspired by Moritz Lenz (moritz) - http://www.nntp.perl.org/group/perl.perl6.users/2008/07/msg788.html . Larry Wall's gimme5-generated Perl5 STD.pmc is included to parse Perl 6 code. The initial STD tree traversal code was written by Paweł Murias (pmurias). It was replaced afterwards for performance reasons with Larry Wall's redspans traversal code. redspans stands for red for reductions, and spans from the "from/to span calculations". The included perl6.vim is written by Luke Palmer, Moritz Lenz, and Hinrik Ãn Sigurðsson.

Thanks guys. I could not have done it without you ;-)

LICENSE AND COPYRIGHT

Copyright (C) 2008-2009 by Ahmad Zawawi

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

This library also includes the following libraries:

STD.pm by Larry Wall (Artistic License 2.0)

JQuery by John Resig (dual licensed under the MIT and GPL licenses).

cpanm Syntax::Highlight::Perl6

perl -MCPAN -e shell
install Syntax::Highlight::Perl6