NAME
Perlito5 - a Perl5 compiler
SYNOPSIS
use Perlito5::Compiler;
use Perlito5::JavaScript2::Emitter;
use Perlito5::JavaScript2::Runtime;
use Data::Dumper;
my $perl5_source = ' print "hello, World!\n" ';
$Perlito5::PKG_NAME = 'main';
$Perlito5::PROTO = {};
my $ast = Perlito5::Grammar::exp_stmts($perl5_source, 0);
print "Syntax Tree:\n";
print Dumper Perlito5::Match::flat($ast);
my $js_source = Perlito5::AST::CompUnit::emit_javascript2_program([
Perlito5::AST::CompUnit->new( name => 'main', body => Perlito5::Match::flat($ast) )
]);
print "JavaScript source code:\n";
print $js_source;
# in the command line:
perlito5 --help
perlito5 -Cjs program.pl
perlito5 -Cjava program.pl
DESCRIPTION
This program reads Perl5 source code and generates native code.
The compiler options are available with the command:
perlito5 -h
COOKBOOK
Obtaining a "perlito5.js" script that executes in the "node.js" JavaScript compiler
# Step 1: use perlito5 to compile perlito5 to JavaScript.
perlito5 --bootstrapping -Cjs `which perlito5` > perlito5.js
# Step 2: ensure that PERL5LIB points to the directory where Perlito5.pm is installed.
echo $PERL5LIB
# Step 3: set PERL5LIB if needed.
perldoc -l Perlito5
# /usr/local/lib/perl5/site_perl/5.20.1/Perlito5.pm
export PERL5LIB=/usr/local/lib/perl5/site_perl/5.20.1
# Step 4: install nodejs if needed.
# Step 5: this should work now:
nodejs perlito5.js -e ' print "hello, World!\n" '
# hello, World!
Obtaining a Perl compiler script that runs in the browser
# Step 1: create a Perl script that loads the compiler and evaluates a string.
# Save this to "perlito5-browser.pl":
use Perlito5::Compiler;
use Perlito5::JavaScript2::Emitter;
use Perlito5::JavaScript2::Runtime;
sub eval_perl5 {
eval "$_[0]; 1"
or warn "Perl error: $@";
}
# Step 2: use perlito5 to compile your "perlito5-browser.pl" script to JavaScript.
perlito5 --bootstrapping -Cjs perlito5-browser.pl > perlito5-browser.js
# Step 3: load the compiler in the browser;
# compile perl5 to javascript;
# eval() the javascript code.
# Note: the default implementation for "print" will invoke console.log();
# you can override this by redefining p5pkg['Perlito5::IO'].print()
<html>
<head>
<script type="text/javascript" src="perlito5-browser.js"></script>
<script type="text/javascript">
function hello() {
return p5pkg.main.eval_perl5([
' print "hello, World!\n" '
]);
}
</script>
</head>
<body>
<input type="button" value="Execute" onclick="hello()"/>
</body>
</html>
AUTHORS
Flavio Soibelmann Glock <fglock@gmail.com>.
SEE ALSO
<http://fglock.github.io/Perlito>
COPYRIGHT
Copyright 2011-2017 by Flavio Soibelmann Glock and others.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See <http://dev.perl.org/licenses/artistic.html>