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Get B::Deparse to load on perls back to 5.8.1
authorNicholas Clark <nick@ccl4.org>
Wed, 27 Oct 2010 19:37:44 +0000 (21:37 +0200)
committerNicholas Clark <nick@ccl4.org>
Wed, 27 Oct 2010 19:55:57 +0000 (21:55 +0200)
But note - not all its tests are parsing, and some routines will fail at runtime
due to methods missing from older Bs.

dist/B-Deparse/Deparse.pm

index 9bf6606..609a1c7 100644 (file)
@@ -11,27 +11,35 @@ package B::Deparse;
 use Carp;
 use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
         OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
-        OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD OPpPAD_STATE
+        OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
         OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
         OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
         OPpCONST_ARYBASE OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
-        OPpSORT_REVERSE OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED
-        OPpREVERSE_INPLACE OPpCONST_NOVER
+        OPpSORT_REVERSE
         SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG
          CVf_METHOD CVf_LVALUE
-        PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE PMf_NONDESTRUCT
+        PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE
         PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED),
-        ($] < 5.009 ? 'PMf_SKIPWHITE' : 'RXf_SKIPWHITE'),
-        ($] < 5.011 ? 'CVf_LOCKED' : ());
-$VERSION = 1.00;
+        ($] < 5.008004 ? () : 'OPpSORT_INPLACE'),
+        ($] < 5.008006 ? () : qw(OPpSORT_DESCEND OPpITER_REVERSED)),
+        ($] < 5.008009 ? () : qw(OPpCONST_NOVER OPpPAD_STATE)),
+        ($] < 5.009 ? 'PMf_SKIPWHITE' : qw(RXf_SKIPWHITE)),
+        ($] < 5.011 ? 'CVf_LOCKED' : 'OPpREVERSE_INPLACE'),
+        ($] < 5.013 ? () : 'PMf_NONDESTRUCT');
+$VERSION = 1.01;
 use strict;
 use vars qw/$AUTOLOAD/;
 use warnings ();
 
 BEGIN {
-    # Easiest way to keep this code portable between 5.12.x and 5.10.x looks to
-    # be to fake up a dummy CVf_LOCKED that will never actually be true.
-    *CVf_LOCKED = sub () {0} unless defined &CVf_LOCKED;
+    # Easiest way to keep this code portable between version looks to
+    # be to fake up a dummy constant that will never actually be true.
+    foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
+               OPpPAD_STATE RXf_SKIPWHITE CVf_LOCKED OPpREVERSE_INPLACE
+               PMf_NONDESTRUCT)) {
+       no strict 'refs';
+       *{$_} = sub () {0} unless *{$_}{CODE};
+    }
 }
 
 # Changes between 0.50 and 0.51:
@@ -1420,9 +1428,10 @@ sub pp_nextstate {
        $self->{'warnings'} = $warning_bits;
     }
 
-    if ($self->{'hints'} != $op->hints) {
-       push @text, declare_hints($self->{'hints'}, $op->hints);
-       $self->{'hints'} = $op->hints;
+    my $hints = $] < 5.008009 ? $op->private : $op->hints;
+    if ($self->{'hints'} != $hints) {
+       push @text, declare_hints($self->{'hints'}, $hints);
+       $self->{'hints'} = $hints;
     }
 
     # hack to check that the hint hash hasn't changed