From: Vincent Pit <vince@profvince.com>
Date: Sat, 29 Nov 2008 23:46:05 +0000 (+0100)
Subject: Work in progress
X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2FSub-Nary.git;a=commitdiff_plain;h=refs%2Fheads%2Fexitdie

Work in progress
---

diff --git a/lib/Sub/Nary.pm b/lib/Sub/Nary.pm
index 2f700b6..313381f 100644
--- a/lib/Sub/Nary.pm
+++ b/lib/Sub/Nary.pm
@@ -213,7 +213,7 @@ sub power {
 my %ops;
 
 $ops{$_} = 1      for scalops;
-$ops{$_} = 0      for qw/stub nextstate pushmark iter unstack/;
+$ops{$_} = 0      for qw/stub nextstate iter unstack/;
 $ops{$_} = 1      for qw/padsv/;
 $ops{$_} = 'list' for qw/padav/;
 $ops{$_} = 'list' for qw/padhv rv2hv/;
@@ -234,11 +234,33 @@ $ops{$_} = { 0 => 0.5, 4 => 0.5 }  for qw/gnbyname gnbyaddr gnetent/;
 $ops{$_} = { 0 => 0.5, 3 => 0.5 }  for qw/gpbyname gpbynumber gprotoent/;
 $ops{$_} = { 0 => 0.5, 4 => 0.5 }  for qw/gsbyname gsbyport gservent/;
 
+# Stolen from B::Deparse
+
+sub padval { $_[0]->{cv}->[0]->PADLIST->ARRAYelt(1)->ARRAYelt($_[1]) }
+
+sub gv_or_padgv {
+ my ($self, $op) = @_;
+ if (class($op) eq 'PADOP') {
+  return $self->padval($op->padix)
+ } else { # class($op) eq "SVOP"
+  return $op->gv;
+ }
+}
+
+sub const_sv {
+ my ($self, $op) = @_;
+ my $sv = $op->sv;
+ # the constant could be in the pad (under useithreads)
+ $sv = $self->padval($op->targ) unless $$sv;
+ return $sv;
+}
+
 sub enter {
  my ($self, $cv) = @_;
 
  return undef, 'list' if class($cv) ne 'CV';
  my $op  = $cv->ROOT;
+ return undef, 'list' if null $op;
  my $tag = tag($op);
 
  return undef, { %{$self->{cache}->{$tag}} } if exists $self->{cache}->{$tag};
@@ -256,54 +278,91 @@ sub enter {
  return undef, $r;
 }
 
+use Test::More;
+use Data::Dumper;
+
 sub inspect {
  my ($self, $op) = @_;
 
  my $n = name($op);
- return add($self->inspect_kids($op)), undef if $n eq 'return';
-
  my $meth = $self->can('pp_' . $n);
  return $self->$meth($op) if $meth;
 
+ my $l;
  if (exists $ops{$n}) {
-  my $l = $ops{$n};
+  $l = $ops{$n};
   $l = { %$l } if ref $l;
-  return undef, $l;
  }
 
- if (class($op) eq 'LOGOP' and not null $op->first) {
-  my @res;
+ my $c = class($op);
+ $meth = $self->can('OPc_' . $c);
+ if ($meth) {
+  my ($r, $lc) = $self->$meth($op);
+  $lc = $l if defined $l;
+  return $r, $lc;
+ }
 
-  my $op = $op->first;
-  my ($r1, $l1) = $self->inspect($op);
-  return $r1, $l1 if defined $r1 and zero $l1;
-  my $c = count $l1;
+ return undef, (defined $l) ? $l : 0;
+}
 
-  $op = $op->sibling;
-  my ($r2, $l2) = $self->inspect($op);
+# UNOPs
 
-  $op = $op->sibling;
-  my ($r3, $l3);
-  if (null $op) {
-   # If the logop has no else branch, it can also return the *scalar* result of
-   # the conditional
-   $l3 = { 1 => 1 };
-  } else {
-   ($r3, $l3) = $self->inspect($op);
-  }
+sub OPc_UNOP { $_[0]->inspect($_[1]->first); }
 
-  my $r = add $r1, scale $c / 2, add $r2, $r3;
-  my $l = scale $c / 2, add $l2, $l3;
-  return $r, $l
- }
+# BINOPs
+
+sub OPc_BINOP {
+ my ($self, $op) = @_;
+
+ my ($r, $l1) = $self->inspect($op->first);
+ return $r, $l1 unless defined $l1;
+
+ my ($r2, $l2) = $self->inspect($op->last);
+ my $c = 1 - count $r;
+ $r = add $r, scale $c, $r2 if defined $r2;
+
+ my $l = scale +(1 - count $r), normalize combine $l1, $l2;
 
- return $self->inspect_kids($op);
+ return $r, $l;
 }
 
-sub inspect_kids {
+# LOGOPs
+
+sub OPc_LOGOP {
  my ($self, $op) = @_;
+ my @res;
+
+ $op = $op->first;
+ return undef, 0 if null $op;
+
+ my ($r1, $l1) = $self->inspect($op);
+ return $r1, $l1 if defined $r1 and zero $l1;
+ my $c = count $l1;
+
+ $op = $op->sibling;
+ my ($r2, $l2) = $self->inspect($op);
+
+ $op = $op->sibling;
+ my ($r3, $l3);
+ if (null $op) {
+  # If the logop has no else branch, it can also return the *scalar* result of
+  # the conditional
+  $l3 = { 1 => 1 };
+ } else {
+  ($r3, $l3) = $self->inspect($op);
+ }
 
- return undef, 0 unless $op->flags & OPf_KIDS;
+ my $r = add $r1, scale $c / 2, add $r2, $r3;
+ my $l = scale $c / 2, add $l2, $l3;
+ return $r, $l;
+
+ return $self->OPc_LISTOP($op);
+}
+
+# LISTOPs
+
+sub OPc_LISTOP {
+ my ($self, $op) = @_;
 
  $op = $op->first;
  return undef, 0 if null $op;
@@ -340,26 +399,7 @@ sub inspect_kids {
  return $r, $l;
 }
 
-# Stolen from B::Deparse
-
-sub padval { $_[0]->{cv}->[0]->PADLIST->ARRAYelt(1)->ARRAYelt($_[1]) }
-
-sub gv_or_padgv {
- my ($self, $op) = @_;
- if (class($op) eq 'PADOP') {
-  return $self->padval($op->padix)
- } else { # class($op) eq "SVOP"
-  return $op->gv;
- }
-}
-
-sub const_sv {
- my ($self, $op) = @_;
- my $sv = $op->sv;
- # the constant could be in the pad (under useithreads)
- $sv = $self->padval($op->targ) unless $$sv;
- return $sv;
-}
+sub pp_return { add($_[0]->OPc_LISTOP($_[1])), undef }
 
 sub pp_entersub {
  my ($self, $op) = @_;
@@ -388,8 +428,8 @@ sub pp_entersub {
     $next = $next->sibling;
    }
    $n  = name($op)
-  } while ($op->flags & OPf_KIDS and { map { $_ => 1 } qw/null leave/ }->{$n});
-  return 'list', undef unless { map { $_ => 1 } qw/gv refgen/ }->{$n};
+  } while $op->flags & OPf_KIDS and ($n eq 'null' or $n eq 'leave');
+  return 'list', undef unless $n eq 'gv' or $n eq 'refgen';
   local $self->{sub} = 1;
   my ($rc, $lc) = $self->inspect($op);
   return $r, scale $c, $lc;
@@ -429,7 +469,7 @@ sub pp_exit {
 sub pp_die {
  my ($self, $op) = @_;
 
- my ($r, undef) = $self->inspect_kids($op);
+ my ($r, undef) = $self->OPc_LISTOP($op);
  if (defined $r) {
   my $c = 1 - count $r;
   $r->{die} = $c if $c;
@@ -505,6 +545,8 @@ sub pp_sassign {
  return $r, $c ? { 1 => $c } : undef
 }
 
+=cut
+
 sub pp_aassign {
  my ($self, $op) = @_;
 
@@ -517,10 +559,12 @@ sub pp_aassign {
  $self->inspect($op);
 }
 
+=cut
+
 sub pp_leavetry {
  my ($self, $op) = @_;
 
- my ($r, $l) = $self->inspect_kids($op);
+ my ($r, $l) = $self->OPc_LISTOP($op);
  if (defined $r) {
   my $d = delete $r->{die};
   return $r, $l if not defined $d;
diff --git a/samples/cx.pl b/samples/cx.pl
index 14cb237..9143830 100755
--- a/samples/cx.pl
+++ b/samples/cx.pl
@@ -71,7 +71,7 @@ sub ifr {
 }
 
 my $code = \&wut;
-
+$code = sub { for (do { return 1, 2, 3 }) { } return 1, 2; };
 print STDERR $bd->coderef2text($code), "\n";
 
 B::Concise::walk_output(\*STDERR);
diff --git a/t/92-pod-coverage.t b/t/92-pod-coverage.t
index b16040e..777f79e 100644
--- a/t/92-pod-coverage.t
+++ b/t/92-pod-coverage.t
@@ -16,7 +16,7 @@ eval "use Pod::Coverage $min_pc";
 plan skip_all => "Pod::Coverage $min_pc required for testing POD coverage" if $@;
 
 all_pod_coverage_ok({ also_private => [
- qr/^inspect/, qr/^pp_/, qw/enter/,
+ qr/^inspect/, qr/^pp_/, qr/^OPc_/, qw/enter/,
  qw/tag scalops/,
  qw/null zero count scale normalize add combine cumulate power/,
  qw/name const_sv gv_or_padgv padval/