/
nodes.pir
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nodes.pir
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# $Id$
=head1 NAME
PAST - Parrot abstract syntax tree for PMC.
=head1 DESCRIPTION
PAST nodes for PMC.
=cut
.sub '' :anon :load :init
## create the classes
.local pmc p6meta
p6meta = new 'P6metaclass'
p6meta.'new_class'('PMC::Class', 'parent'=>'PAST::Node')
.return ()
.end
=head1 NODES
=head2 C<PMC::Class>
PMC class by it self.
=cut
.namespace [ 'PMC';'Class' ]
.sub 'new' :method
.param pmc children :slurpy
.param pmc adverbs :slurpy :named
.local pmc res
$P0 = self.'HOW'()
$P0 = getattribute $P0, 'parrotclass'
res = new $P0
res.'init'(children :flat, adverbs :flat :named)
# Initialize various attributes
$P1 = new ['ResizableStringArray']
res.'attr'('does', $P1, 1)
$P1 = new ['ResizableStringArray']
res.'attr'('parents', $P1, 1)
$P1 = new ['Hash']
res.'attr'('vtables', $P1, 1)
$P1 = new ['Hash']
res.'attr'('vtdump', $P1, 1)
$P1 = new ['Hash']
res.'attr'('methods', $P1, 1)
# Multis are Hash of Arrays. name -> implementation*
$P1 = new ['Hash']
res.'attr'('multis', $P1, 1)
$P1 = new ['ResizablePMCArray']
res.'attr'('attrs', $P1, 1)
$P1 = new ['ResizableStringArray']
res.'attr'('provides', $P1, 1)
$P1 = new ['Hash']
res.'attr'('traits', $P1, 1)
$P1 = new ['ResizableStringArray']
res.'attr'('maps', $P1, 1)
.return (res)
.end
=item C<does>
How does this PMC act?.
=cut
.sub 'does' :method
.tailcall self.'attr'('does',0,0)
.end
=item C<parents>
Get PMC parents.
=cut
.sub 'parents' :method
.tailcall self.'attr'('parents',0,0)
.end
=item C<class_init>
Get PMC vtable class_init, if any.
=cut
.sub 'class_init' :method
.tailcall self.'attr'('class_init',0,0)
.end
=item C<vtables>
Get PMC vtable methods.
=cut
.sub 'vtables' :method
.tailcall self.'attr'('vtables',0,0)
.end
=item C<vtudmp>
Get PMC vtable dump hash.
=cut
.sub 'vtdump' :method
.tailcall self.'attr'('vtdump',0,0)
.end
=item C<methods>
Get PMC methods.
=cut
.sub 'methods' :method
.tailcall self.'attr'('methods',0,0)
.end
=item C<multis>
Get PMC MULTIs.
=cut
.sub 'multis' :method
.tailcall self.'attr'('multis',0,0)
.end
=item C<provides>
Get PMC provided interfaces.
=cut
.sub 'provides' :method
.tailcall self.'attr'('provides',0,0)
.end
=item C<attrs>
Get PMC ATTRs.
=cut
.sub 'attrs' :method
.tailcall self.'attr'('attrs',0,0)
.end
=item C<traits>
Get PMC traits.
=cut
.sub 'traits' :method
.tailcall self.'attr'('traits',0,0)
.end
.sub 'maps' :method
.tailcall self.'attr'('maps',0,0)
.end
=item C<thaw_pmc_attrs>
unserialize a PMC's frozen ATTRs and add them to this PMC.
=cut
.sub 'thaw_pmc_attrs' :method
.param string pmcname
.local pmc pmc_path, attrs, fh, it, filename
.local string dumpname
#search through all dirs in @pmc_path, looking for a file
#named lc(pmcname) ~".dump"
pmc_path = get_hll_global ['PMC';'Emitter'], '@?pmc_path'
dumpname = pmcname
dumpname = downcase dumpname
dumpname = concat dumpname, '.dump'
#print "looking for "
#say dumpname
fh = new ['FileHandle']
it = iter pmc_path
path_loop:
unless it goto dump_not_found
filename = shift it
concat filename, "/"
concat filename, dumpname
push_eh iter_next
#print "trying to open "
#print filename
#print " ..."
fh.'open'(filename)
goto dump_found
iter_next:
pop_eh
#say "failed"
goto path_loop
dump_found:
pop_eh
#say "succeeded"
$S0 = fh.'readall'()
close fh
.local pmc attr
.local string type, name
.local int is_fp
attrs = thaw $S0
it = iter attrs
iter_loop:
unless it goto iter_done
attr = shift it
name = attr['name']
type = attr['type']
is_fp = attr['is_fp']
self.'add_attr'(name, type, is_fp)
goto iter_loop
iter_done:
.return ()
dump_not_found:
printerr "WARNING: couldn't read .dump for "
printerr pmcname
printerr ".pmc\n"
.return ()
.end
=item C<add_class_init>
Add a class_init function to PMC.
=cut
.sub 'add_class_init' :method
.param pmc method
.local string name
name = 'class_init'
$I0 = exists self['class_init']
unless $I0 goto add_method
$S0 = "Duplicate class_init function: "
die $S0
add_method:
self['class_init'] = method
.return ()
.end
=item C<set_vtdump>
Store the thawed vtable.tbl dump in this PMC.
=cut
.sub 'set_vtdump' :method
.param pmc vtdump
.tailcall self.'attrs'('vtdump', vtdump, 1)
.end
=item C<add_vtable>
Add a VTABLE function to this PMC's default vtable.
=cut
.sub 'add_vtable' :method
.param string name
.param pmc method
$P0 = self.'attr'('vtables', 0, 0)
$I0 = exists $P0['default']
if $I0 goto check_name
$P1 = new ['Hash']
$P0['default'] = $P1
check_name:
$I0 = exists $P0[name]
unless $I0 goto add_method
$S0 = concat "Duplicate VTABLE function: ", name
die $S0
add_method:
$P0['default';name] = method
.return ()
.end
=item C<add_method>
Add METHOD to PMC.
=cut
.sub 'add_method' :method
.param string name
.param pmc method
$P0 = self.'attr'('methods', 0, 0)
$I0 = exists $P0[name]
unless $I0 goto add_method
$S0 = concat "Duplicate METHOD: ", name
die $S0
add_method:
$P0[name] = method
.return ()
.end
=item C<add_multi>
Add MULTI to PMC.
=cut
.sub 'add_multi' :method
.param string name
.param pmc multi
.local pmc list
$P0 = self.'attr'('multis', 0, 0)
list = $P0[name]
unless null list goto vivify
list = new ['ResizablePMCArray']
$P0[name] = list
vivify:
push list, multi
.return ()
.end
=item C<add_attr>
Add an ATTR to PMC.
=cut
.sub 'add_attr' :method
.param string name
.param string type
.param int is_fp
.local pmc it, attrs, attr
attrs = self.'attr'('attrs', 0, 0)
it = iter attrs
iter_start:
unless it goto add_method
$P0 = shift it
$S0 = $P0['name']
$I0 = cmp $S0, name
if $I0 goto iter_start
$S0 = concat "Duplicate ATTR: ", name
die $S0
add_method:
attr = new ['Hash']
attr['type'] = type
attr['name'] = name
attr['is_fp'] = is_fp
push attrs, attr
.return ()
.end
=head1 COPYRIGHT
Copyright (C) 2009, Parrot Foundation.
=cut
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