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lexicals.t
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lexicals.t
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#!perl
# Copyright (C) 2001-2006, The Perl Foundation.
# $Id$
use strict;
use warnings;
use lib qw( . lib ../lib ../../lib );
use Test::More;
use Parrot::Test tests => 42;
=head1 NAME
t/op/lexicals.t - Lexical Ops
=head1 SYNOPSIS
% prove t/op/lexicals.t
=head1 DESCRIPTION
Tests various lexical scratchpad operations, as described in PDD20.
=cut
pasm_output_is( <<'CODE', <<'OUTPUT', '.lex parsing - PASM (\'$a\') succeeds' );
.pcc_sub main:
.lex "$a", P0
print "ok\n"
end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', '.lex parsing - PIR' );
.sub main
.lex "$a", P0
print "ok\n"
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', '.lex parsing - PIR, $P' );
.sub main :main
.lex '$a', $P0
null $P0
print "ok\n"
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', '.lex parsing - PIR, local var' );
.sub main :main
.local pmc a
.lex "$a", a
print "ok\n"
.end
CODE
ok
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', '.lex - same PMC twice (PASM)' );
.pcc_sub main:
.lex '$a', P0
.lex '$b', P0
new P0, .String
set P0, "ok\n"
find_lex P1, '$a'
print P1
find_lex P2, '$a'
print P2
end
CODE
ok
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', '.lex - same PMC twice fails (.local pmc ab)' );
.sub main :main
.local pmc ab, a, b
.lex '$a', ab
.lex '$b', ab
ab = new .String
ab = "ok\n"
a = find_lex '$a'
print a
b = find_lex '$b'
print b
.end
CODE
ok
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', '.lex - same lex twice' );
.sub main
.lex '$a', $P0
.lex '$a', $P1
say "ok"
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'api parsing' );
.sub main :main
.lex 'a', $P0
store_lex 'a', $P0
$P0 = find_lex 'a'
print "ok\n"
.include 'interpinfo.pasm'
load_bytecode "pcore.pir" # TODO autoload/preload
interpinfo $P1, .INTERPINFO_CURRENT_SUB
$P2 = $P1.'get_lexinfo'()
$P2 = $P1.'get_lexenv'()
print "ok\n"
.end
CODE
ok
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexinfo' );
.sub main :main
.lex '$a', $P0
.lex '$b', $P9
.include "interpinfo.pasm"
interpinfo $P1, .INTERPINFO_CURRENT_SUB
$P2 = $P1.'get_lexinfo'()
$S0 = typeof $P2
print $S0
print ' '
$I0 = elements $P2
print $I0
print_newline
.end
CODE
LexInfo 2
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexinfo - no lexicals' );
.sub main :main
.include "interpinfo.pasm"
interpinfo $P1, .INTERPINFO_CURRENT_SUB
$P2 = $P1.'get_lexinfo'()
if null $P2 goto ok
print "LexInfo not NULL\n"
end
ok:
print "ok\n"
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexpad - no pad' );
.sub main :main
.local pmc pad, interp
interp = getinterp
pad = interp["lexpad"]
if null pad goto ok
print "pad not NULL\n"
end
ok:
print "ok\n"
end
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexpad - no pad inherited in coro' );
.sub main
coro()
.end
.sub coro
.local pmc pad, interp
interp = getinterp
pad = interp["lexpad"]
if null pad goto ok
print "pad not NULL\n"
.yield()
ok:
print "ok\n"
.yield()
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexpad - set var via pad' );
.sub main
.local pmc pad, interp
interp = getinterp
pad = interp["lexpad"]
.lex '$a', P0
unless null pad goto ok
print "pad is NULL\n"
end
ok:
print "ok\n"
P1 = new .Integer
P1 = 13013
pad['$a'] = P1
print P0
print "\n"
end
.end
CODE
ok
13013
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexpad - set two vars via pad (2 lex -> 2 pmc)' );
.sub main
.lex '$a', P0
.lex '$b', P2
.local pmc pad, interp
interp = getinterp
pad = interp["lexpad"]
.local pmc pad
unless null pad goto ok
print "pad is NULL\n"
end
ok:
print "ok\n"
P1 = new .Integer
P1 = 13013
pad['$a'] = P1
print P0
print "\n"
P1 = 42
pad['$b'] = P1
print P2
print "\n"
end
.end
CODE
ok
13013
42
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'synopsis example' );
.sub main
.lex '$a', P0
P1 = new .Integer
P1 = 13013
store_lex '$a', P1
print P0
print "\n"
end
.end
CODE
13013
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', ':lex parsing - PASM' );
.pcc_sub main:
print "ok\n"
end
.pcc_sub :lex foo:
returncc
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', ':lex parsing - PIR' );
.sub main
print "ok\n"
.end
.sub foo :lex
.end
CODE
ok
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', ':outer parsing - PASM' );
.pcc_sub main:
print "ok\n"
end
.pcc_sub :outer('main') foo:
returncc
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', ':outer parsing - PIR' );
.sub main
print "ok\n"
.end
.sub foo :outer('main')
.end
CODE
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', ':outer parsing - ident' );
.sub main
.local pmc a
.lex "$a", a
print "ok\n"
end
.end
.sub foo :outer(main)
.end
CODE
ok
OUTPUT
pir_output_like( <<'CODE', <<'OUTPUT', ':outer parsing - missing :outer' );
.sub main
print "ok\n"
.end
.sub foo :outer(oops)
.end
CODE
/Undefined :outer sub 'oops'\./
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_lexinfo from pad' );
.sub main
.lex '$a', P0
.local pmc pad, interp, info
interp = getinterp
pad = interp["lexpad"]
unless null pad goto ok
print "pad is NULL\n"
end
ok:
print "ok\n"
info = pad.'get_lexinfo'()
typeof $S0, info
print $S0
print "\n"
end
.end
CODE
ok
LexInfo
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', ':lex parsing - verify info and pad' );
.sub main
foo()
print "ok\n"
.end
.sub foo :lex
.local pmc pad, interp, info
interp = getinterp
pad = interp["lexpad"]
unless null pad goto ok
print "pad is NULL\n"
end
ok:
print "ok\n"
typeof $S0, pad
print $S0
print "\n"
info = pad.'get_lexinfo'()
typeof $S0, info
print $S0
print "\n"
.end
CODE
ok
LexPad
LexInfo
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_outer' );
.sub "main"
foo()
.end
.sub foo :outer('main')
.include "interpinfo.pasm"
interpinfo $P1, .INTERPINFO_CURRENT_SUB
$P2 = $P1."get_outer"()
print $P2
print "\n"
.end
CODE
main
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_outer 2' );
.sub "main"
foo()
.end
.sub foo :outer('main')
bar()
.end
.sub bar :outer('foo')
.include "interpinfo.pasm"
interpinfo $P1, .INTERPINFO_CURRENT_SUB
$P2 = $P1."get_outer"()
print $P2
print "\n"
$P3 = $P2."get_outer"()
print $P3
print "\n"
.end
CODE
foo
main
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'get_outer via interp' );
.sub "main"
.const .Sub foo = "foo"
.local pmc foo_cl
.lex "a", $P0
foo_cl = newclosure foo
foo_cl()
print $P0
.end
.sub foo :outer('main')
.const .Sub bar = "bar"
.local pmc bar_cl
bar_cl = newclosure bar
bar_cl()
.end
.sub bar :outer('foo')
.local pmc sub, interp, pad
interp = getinterp
sub = interp["outer"]
print sub
print "\n"
sub = interp["outer"; "sub"]
print sub
print "\n"
sub = interp["outer"; 2]
print sub
print "\n"
sub = interp["outer"; "sub"; 2]
print sub
print "\n"
$P0 = new .String
$P0 = "I messed with your var\n"
pad = interp["outer"; "lexpad"; 2]
pad['a'] = $P0
.end
CODE
foo
foo
main
main
I messed with your var
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'closure 3' );
# sub foo {
# my ($n) = @_;
# sub {$n += shift}
# }
# my $f = foo(5);
# print &$f(3), "\n";
# my $g = foo(20);
# print &$g(3), "\n";
# print &$f(3), "\n";
# print &$g(4), "\n";
.sub foo
.param pmc arg
.local pmc n
.lex '$n', n
n = arg
.const .Sub anon = "anon"
$P0 = newclosure anon
.return ($P0)
.end
.sub anon :outer(foo)
.param pmc arg
$P0 = find_lex '$n'
# in practice we need copying the arg but as it is passed
# as native int, we already have a fresh pmc
$P0 += arg
.return ($P0)
.end
.sub main :main
.local pmc f, g
.lex '$f', f
.lex '$g', g
f = foo(5)
$P0 = f(3)
print $P0
print "\n"
g = foo(20)
$P0 = g(3)
print $P0
print "\n"
$P0 = f(3)
print $P0
print "\n"
$P0 = g(4)
print $P0
print "\n"
.end
CODE
8
23
11
27
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'closure 4' );
# code by Piers Cawley
=pod
;;; Indicate that the computation has failed, and that the program
;;; should try another path. We rebind this variable as needed.
(define fail
(lambda () (error "Program failed")))
;;; Choose an arbitrary value and return it, with backtracking.
;;; You are not expected to understand this.
(define (choose . all-choices)
(let ((old-fail fail))
(call-with-current-continuation
(lambda (continuation)
(define (try choices)
(if (null? choices)
(begin
(set! fail old-fail)
(fail))
(begin
(set! fail
(lambda () (continuation (try (cdr choices)))))
(car choices))))
(try all-choices)))))
;;; Find two numbers with a product of 15.
(let ((x (choose 1 3 5))
(y (choose 1 5 9)))
(for-each display `("Trying " ,x " and " ,y #\newline))
(unless (= (* x y) 15)
(fail))
(for-each display `("Found " ,x " * " ,y " = 15" #\newline)))
=cut
.sub main :main
.local pmc fail, arr1, arr2, x, y, choose
.lex 'fail', fail
.lex 'arr1', arr1
.lex 'arr2', arr2
.lex 'x', x
.lex 'y', y
.lex 'choose', choose
.const .Sub choose_sub = "_choose"
.const .Sub fail_sub = "_fail"
fail = newclosure fail_sub
arr1 = new ResizablePMCArray
arr1[0] = 1
arr1[1] = 3
arr1[2] = 5
arr2 = new ResizablePMCArray
arr2[0] = 1
arr2[1] = 5
arr2[2] = 9
choose = newclosure choose_sub
x = choose(arr1)
#print "Chosen "
#print x
#print " from arr1\n"
# need to create a new closure: these closures have different state
choose = newclosure choose_sub
y = choose(arr2)
#print "Chosen "
#print y
#print " from arr2\n"
$I1 = x
$I2 = y
$I0 = $I1 * $I2
if $I0 == 15 goto success
fail()
print "Shouldn't get here without a failure report\n"
branch the_end
success:
print x
print " * "
print y
print " == 15!\n"
the_end:
end
.end
.sub _choose :outer(main)
.param ResizablePMCArray choices
.local pmc our_try, old_fail, cc, try
.lex 'old_fail', old_fail
.lex 'cc', cc
.lex 'try', try
#print "In choose\n"
old_fail = find_lex "fail"
.include "interpinfo.pasm"
$P1 = interpinfo .INTERPINFO_CURRENT_CONT
store_lex "cc", $P1
.const .Sub tr_sub = "_try"
newclosure our_try, tr_sub
store_lex "try", our_try
$P2 = our_try(choices)
.return($P2)
.end
.sub _try :outer(_choose)
.param ResizablePMCArray choices
.lex 'choices', $P0
#print "In try\n"
clone $P0, choices
if choices goto have_choices
$P1 = find_lex "old_fail"
store_lex "fail", $P1
$P1()
have_choices:
.const .Sub f = "new_fail"
newclosure $P2, f
store_lex "fail", $P2
$P3 = find_lex "choices"
shift $P4, $P3
.return($P4)
.end
.sub new_fail :outer(_try)
.local pmc our_try
.local pmc our_cc
#print "In new_fail\n"
our_cc = find_lex "cc"
our_try = find_lex "try"
$P2 = find_lex "choices"
$P3 = our_try($P2)
our_cc($P3)
.end
.sub _fail :outer(main)
print "Program failed\n"
.end
CODE
3 * 5 == 15!
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'closure 5' );
# FIXME - we need to detect the destruction of the P registers
# associated with the Contexts for the calls of xyzzy and plugh.
# Otherwise, this test is just a repeat of others
.sub main :main
.local pmc f
f = xyzzy()
f()
f()
f()
.end
.sub xyzzy
$P1 = plugh()
.return ($P1)
.end
.sub plugh
$P1 = foo()
.return ($P1)
.end
.sub foo
.lex 'a', $P0
$P0 = new Integer
$P0 = 0
.const .Sub bar_sub = "bar"
$P1 = newclosure bar_sub
.return ($P1)
.end
.sub bar :anon :outer(foo)
$P0 = find_lex 'a'
inc $P0
print "bar: "
print $P0
print "\n"
.end
CODE
bar: 1
bar: 2
bar: 3
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'closure 6' );
# Leo's version of xyzzy original by particle, p5 by chip #'
.sub main :main
.local pmc f,g
f = xyzzy(42)
$P0 = f()
$P0 = f()
$P0 = f()
g = xyzzy(13013)
$P0 = g()
$P0 = f()
.end
.sub xyzzy
.param int i
.local pmc f
f = plugh(i)
.return (f)
.end
.sub plugh
.param int i
.local pmc f
f = foo(i)
.return (f)
.end
.sub foo
.param int i
.lex 'a', $P0
$P1 = new Integer
$P1 = i
store_lex 'a', $P1
print "foo: "
print $P0
print "\n"
.const .Sub closure = 'bar'
$P2 = newclosure closure
.return($P2)
.end
.sub bar :anon :outer(foo)
$P0 = find_lex 'a'
inc $P0
store_lex 'a', $P0
print "bar: "
print $P0
print "\n"
.end
CODE
foo: 42
bar: 43
bar: 44
bar: 45
foo: 13013
bar: 13014
bar: 46
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'closure 7 - evaled' );
.sub main :main
.local pmc f,g
f = xyzzy(42)
$P0 = f()
$P0 = f()
$P0 = f()
g = xyzzy(13013)
$P0 = g()
$P0 = f()
.end
.sub xyzzy
.param int i
.local pmc f
f = plugh(i)
.return (f)
.end
.sub plugh
.param int i
.local pmc f
f = foo(i)
.return (f)
.end
.sub foo
.param int i
.lex 'a', $P0
$P1 = new Integer
$P1 = i
store_lex 'a', $P1
print "foo: "
print $P0
print "\n"
.local string code
code = <<'EOC'
.sub bar :anon :outer(foo)
$P0 = find_lex 'a'
inc $P0
store_lex 'a', $P0
print "bar: "
print $P0
print "\n"
.end
EOC
.local pmc compiler
compiler = compreg "PIR"
$P1 = compiler(code)
$P2 = $P1[0] # first sub of eval
$P3 = newclosure $P2
.return($P3)
.end
CODE
foo: 42
bar: 43
bar: 44
bar: 45
foo: 13013
bar: 13014
bar: 46
OUTPUT
pir_output_like( <<'CODE', <<'OUT', 'closure 8' );
# p6 example from pmichaud
# { my $x = 5; { print $x; my $x = 4; print $x; } }
## According to S04 this is an error
.sub main :main
.lex '$x', $P0
$P0 = new .Integer
$P0 = 5
anon_1()
.end
.sub anon_1 :anon :outer(main)
# anon closure
$P0 = find_lex '$x'
print $P0
.lex '$x', $P1
$P1 = new .Integer
$P1 = 4
print $P1
.end
CODE
/Null PMC access/
OUT
pir_output_like( <<'CODE', <<'OUTPUT', 'get non existing' );
.sub "main" :main
.lex 'a', $P0
foo()
.end
.sub foo :outer('main')
.lex 'b', $P0
bar()
.end
.sub bar :outer('foo')
.lex 'c', $P0
$P2 = find_lex 'no_such'
.end
CODE
/Lexical 'no_such' not found/
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'find_name on lexicals' );
.sub main :main
.lex 'a', $P0
$P1 = new .String
$P1 = "ok\n"
store_lex 'a', $P1
$P2 = find_name 'a'
print $P0
print $P1
print $P2
.end
CODE
ok
ok
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'multiple names' );
.sub main :main
.lex 'a', $P0
.lex 'b', $P0
.lex 'c', $P0
$P1 = new .String
$P1 = "ok\n"
store_lex 'a', $P1
$P2 = find_name 'b'
print $P0
print $P1
print $P2
$P3 = find_lex 'c'
print $P3
.end
CODE
ok
ok
ok
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'package-scoped closure 1' );
# my $x;
# sub f{$x++}
# f()
# print "$x\n"
.sub '&main' :main :anon
.local pmc sx
.lex '$x', sx
sx = new .Integer
sx = 33
'&f'()
print sx # no find_lex needed - 'sx' is defined here
print "\n"
'&f'()
print sx
print "\n"
'&f'()
print sx
print "\n"
.end
.sub '&f' :outer('&main')
$P0 = find_lex '$x' # find_lex needed
inc $P0
.end
CODE
34
35
36
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'package-scoped closure 2' );
# my $x;
# sub f{$x++}
# sub g{f();f()}
# g()
# print "$x\n"
.sub '&main' :main :anon
.local pmc sx
.lex '$x', sx
sx = new .Integer
sx = -32
'&g'()
print sx
print "\n"
'&g'()
print sx
print "\n"
'&g'()
print sx
print "\n"
.end
.sub '&f' :outer('&main')
$P0 = find_lex '$x'
inc $P0
.end
.sub '&g' :outer('&main') # :outer not needed - no find_lex
'&f'()
'&f'()
.end
CODE
-30
-28
-26
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'package-scoped closure 3 - autoclose' );
# sub f ($x) {
# sub g ($y) { $x + $y }; g($x);
# }
# f(10); # 20
# g(100); # 110
.sub '&f'
.param pmc x
.lex '$x', x
$P0 = '&g'(x)
.return ($P0)
.end
.sub '&g' :outer('&f')
.param pmc y
.lex '$y', y
.local pmc x
x = find_lex '$x'
$P0 = n_add x, y
.return ($P0)
.end
.sub '&main' :main :anon
$P0 = '&f'(10)