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gen_class.pl
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gen_class.pl
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#! perl
# Copyright (C) 2001-2008, Parrot Foundation.
=head1 NAME
tools/dev/gen_class.pl - Create a template PMC file
=head1 SYNOPSIS
% perl tools/dev/gen_class.pl Foo > src/pmc/Foo.pmc
=head1 DESCRIPTION
Use this script to generate a template PMC file with stubs for all the
methods you need to fill in. See F<docs/vtables.pod> for more
information on adding a new PMC to Parrot.
To see what a minimal PMC looks like, create a PMC template and compile
it to C.
% perl tools/dev/gen_class.pl Foo > src/pmc/foo.pmc
% perl tools/build/pmc2c.pl --dump src/pmc/foo.pmc
% perl tools/build/pmc2c.pl -c src/pmc/foo.pmc
=head1 SEE ALSO
F<tools/build/pmc2c.pl>, F<docs/vtables.pod>.
=cut
use strict;
use warnings;
use FindBin;
use lib "$FindBin::Bin/../../lib";
use Parrot::Vtable;
my $vtbl = parse_vtable("$FindBin::Bin/../../src/vtable.tbl");
my $classname = shift
or die "No classname given!\n";
my $year = (localtime())[5] + 1900; # get current year.
## emit file header
print <<"EOF";
/* ${classname}.pmc
* Copyright (C) $year, Parrot Foundation.
* Overview:
* These are the vtable functions for the $classname base class
* Data Structure and Algorithms:
* History:
* Notes:
* Please remove unneeded entries.
* References:
*/
#include "parrot/parrot.h"
pmclass $classname {
EOF
my %skip_bodies = map { $_ => 1 } qw( type name get_namespace );
## emit method bodies
for (@$vtbl) {
my ( $retval, $methname, $args ) = @$_;
# default.pmc handles these
next if exists $skip_bodies{$methname};
next if $methname =~ /prop/;
print " $retval $methname($args) {\n";
if ( $retval ne 'void' ) {
print $retval eq 'PMC*'
? " return PMCNULL;\n"
: " return ($retval)0;\n";
}
print " }\n\n";
}
## emit file footer
print qq|}
/*
* Local Variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/|;
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4: