Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

lib/B/Deparse.pm: Don't get upset by OP_METHSTART in method subs #22790

Open
wants to merge 1 commit into
base: blead
Choose a base branch
from
Open

lib/B/Deparse.pm: Don't get upset by OP_METHSTART in method subs #22790

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
37 changes: 26 additions & 11 deletions lib/B/Deparse.pm
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
# This is based on the module of the same name by Malcolm Beattie,
# but essentially none of his code remains.

package B::Deparse 1.80;
package B::Deparse 1.81;
use strict;
use Carp;
use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
Expand All @@ -28,7 +28,7 @@ use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
OPpARG_IF_UNDEF OPpARG_IF_FALSE
SVf_IOK SVf_NOK SVf_ROK SVf_POK SVf_FAKE SVs_RMG SVs_SMG
SVs_PADTMP
CVf_NOWARN_AMBIGUOUS CVf_LVALUE
CVf_NOWARN_AMBIGUOUS CVf_LVALUE CVf_IsMETHOD
PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE
PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED PMf_EXTENDED_MORE
PADNAMEf_OUTER PADNAMEf_OUR PADNAMEf_TYPED
Expand Down Expand Up @@ -480,7 +480,8 @@ sub next_todo {
# XXX We would do $self->keyword("sub"), but ‘my CORE::sub’
# doesn’t work and ‘my sub’ ignores a &sub in scope. I.e.,
# we have a core bug here.
push @text, "sub " . substr $name->PVX, 1;
my $kw = $cv ? $self->kw_sub_or_method($cv) : "sub";
push @text, "$kw " . substr $name->PVX, 1;
if ($cv) {
# my sub foo { }
push @text, " " . $self->deparse_sub($cv);
Expand Down Expand Up @@ -554,7 +555,7 @@ sub next_todo {
} elsif (defined $stash) {
$name =~ s/^\Q$stash\E::(?!\z|.*::)//;
}
my $ret = "$pragmata${p}${l}" . $self->keyword("sub") . " $name "
my $ret = "$pragmata${p}${l}" . $self->keyword($self->kw_sub_or_method($cv)) . " $name "
. $self->deparse_sub($cv);
$self->{'subs_declared'}{$name} = 1;
return $ret;
Expand Down Expand Up @@ -1304,6 +1305,12 @@ sub deparse_argops {
}


sub kw_sub_or_method {
my $self = shift;
my $cv = shift;
return ($cv->CvFLAGS & CVf_IsMETHOD) ? "method" : "sub";
}

# Deparse a sub. Returns everything except the 'sub foo',
# e.g. ($$) : method { ...; }
# or : prototype($$) lvalue ($a, $b) { ...; };
Expand All @@ -1329,10 +1336,13 @@ Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
$proto = $myproto;
}
}
if ($cv->CvFLAGS & (CVf_NOWARN_AMBIGUOUS|CVf_LOCKED|CVf_LVALUE|CVf_ANONCONST)) {
push @attrs, "lvalue" if $cv->CvFLAGS & CVf_LVALUE;
push @attrs, "method" if $cv->CvFLAGS & CVf_NOWARN_AMBIGUOUS;
push @attrs, "const" if $cv->CvFLAGS & CVf_ANONCONST;
my $cv_flags = $cv->CvFLAGS;
my $is_method = $cv_flags & CVf_IsMETHOD;

if ($cv_flags & (CVf_NOWARN_AMBIGUOUS|CVf_LOCKED|CVf_LVALUE|CVf_ANONCONST)) {
push @attrs, "lvalue" if $cv_flags & CVf_LVALUE;
push @attrs, "method" if $cv_flags & CVf_NOWARN_AMBIGUOUS and !$is_method;
push @attrs, "const" if $cv_flags & CVf_ANONCONST;
}

local($self->{'curcv'}) = $cv;
Expand All @@ -1351,6 +1361,10 @@ Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
my $is_list = ($lineseq->name eq "lineseq");
my $firstop = $is_list ? $lineseq->first : $lineseq;

if ($is_method and $firstop->name eq "methstart") {
$firstop = $firstop->sibling;
}

# Try to deparse first subtree as a signature if possible.
# Top of signature subtree has an ex-argcheck as a placeholder
if ( $has_sig
Expand Down Expand Up @@ -2812,8 +2826,9 @@ sub pp_refgen {

sub e_anoncode {
my ($self, $info) = @_;
my $text = $self->deparse_sub($info->{code});
return $self->keyword("sub") . " $text";
my $cv = $info->{code};
my $text = $self->deparse_sub($cv);
return $self->keyword($self->kw_sub_or_method($cv)) . " $text";
}

sub pp_anoncode {
Expand Down Expand Up @@ -5645,7 +5660,7 @@ sub const {
$self->{curcv}->object_2svref == $ref->object_2svref) {
return $self->keyword("__SUB__");
}
return "sub " . $self->deparse_sub($ref);
return $self->kw_sub_or_method($ref) . " " . $self->deparse_sub($ref);
}
if ($class ne 'SPECIAL' and $ref->FLAGS & SVs_SMG) {
for (my $mg = $ref->MAGIC; $mg; $mg = $mg->MOREMAGIC) {
Expand Down
15 changes: 14 additions & 1 deletion lib/B/Deparse.t
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ BEGIN {
use warnings;
use strict;

my $tests = 52; # not counting those in the __DATA__ section
my $tests = 53; # not counting those in the __DATA__ section

use B::Deparse;
my $deparse = B::Deparse->new();
Expand Down Expand Up @@ -571,6 +571,19 @@ is runperl(stderr => 1, switches => [ '-MO=-qq,Deparse', $path ],
"package Foo;\nsub f {\n 1;\n}\nsub BEGIN {\n *Bar::f = \\&f;\n}\n",
"sub glob alias in separate package shouldn't impede emitting original sub";

# method declarations (GH#22777)
like runperl(stderr => 1, switches => [ '-MO=-qq,Deparse', $path ],
prog => <<'EOF',
use feature qw( class signatures );
class C {
field $x;
method m () { $x++ }
}
EOF
),
qr/ +method m \(\) \{\n +\$x\+\+;\n +\}/,
"feature class method deparses as method";


done_testing($tests);

Expand Down
Loading