#!/usr/bin/env perl
#
# Note: t/test.t searches for the next line.
# Annotation: Demonstrates graphing a Parse::RecDescent-style grammar.
use strict;
use warnings;
use File::Slurp; # For read_file().
use File::Spec;
use GraphViz2;
use GraphViz2::Parse::RecDescent;
use Log::Handler;
use Parse::RecDescent;
# ------------------------------------------------
my($logger) = Log::Handler -> new;
$logger -> add
(
screen =>
{
maxlevel => 'debug',
message_layout => '%m',
minlevel => 'error',
}
);
my($graph) = GraphViz2 -> new
(
edge => {color => 'grey'},
global => {directed => 1},
graph => {rankdir => 'TB'},
logger => $logger,
node => {color => 'blue', shape => 'oval'},
);
my($g) = GraphViz2::Parse::RecDescent -> new(graph => $graph);
my $grammar = read_file(File::Spec -> catfile('t', 'sample.recdescent.1.dat') );
my($parser) = Parse::RecDescent -> new($grammar);
$g -> create(name => 'Grammar', grammar => $parser);
my($format) = shift || 'svg';
my($output_file) = shift || File::Spec -> catfile('html', "parse.recdescent.$format");
$graph -> run(format => $format, output_file => $output_file);