Hello
aartist,
I'm currently experimenting with PPI and it can be used to visualize your program.
Using davido sample code I arranged:
use strict;
use warnings;
use PPI;
use PPI::Dumper;
# retrieve the example standalone script from DATA
my $doc;
while (<DATA>){ $doc .= $_}
my $pdom = PPI::Document->new( \$doc );
# uncomment to see the whole pdom
#PPI::Dumper->new($pdom)->print;
$pdom->find(
sub{
# skip white spaces, for example
return if $_[1]->isa('PPI::Token::Whitespace');
# just print top level elements
if (
# is a top level element
$_[1]->parent == $pdom
){
# PPI class remove \n at the en
+d starting line
print "found TOPLEVEL ",ref $_[1]," ", $_[1]=~s/\n$//r ,"
+(line ",$_[1]->line_number,")\n";
}
}
);
__DATA__
#!/usr/bin/env perl
my $fb = fizzbuzz();
print "$_\n" for @$fb;
sub fizzbuzz {
my ($n, $m) = (1, 100);
my @out;
for my $num ($n .. $m) {
my $line = '';
$line .= 'fizz' if $num % 3 == 0;
$line .= 'buzz' if $num % 5 == 0;
push @out, $line || $num;
}
return \@out;
}
and the output is:
found TOPLEVEL PPI::Token::Comment #!/usr/bin/env perl (line 1)
found TOPLEVEL PPI::Statement::Variable my $fb = fizzbuzz(); (line 3)
found TOPLEVEL PPI::Statement print "$_\n" for @$fb; (line 4)
found TOPLEVEL PPI::Statement::Sub sub fizzbuzz {
my ($n, $m) = (1, 100);
my @out;
for my $num ($n .. $m) {
my $line = '';
$line .= 'fizz' if $num % 3 == 0;
$line .= 'buzz' if $num % 5 == 0;
push @out, $line || $num;
}
return \@out;
} (line 6)
L*
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