depot/third_party/nixpkgs/pkgs/development/interpreters/perl/cross540.patch

From: =?UTF-8?q?Christian=20K=C3=B6gler?= <ck3d@gmx.de>
Date: Mon, 10 Apr 2023 22:12:24 +0200
Subject: [PATCH] miniperl compatible modules

CPAN::Meta
ExtUtils::MakeMaker
JSON::PP
Data::Dumper

Updated for perl v5.40.0 by marcus@means.no

---

 # safe if given an unblessed reference
diff --git a/cpan/CPAN-Meta-YAML/lib/CPAN/Meta/YAML.pm b/cpan/CPAN-Meta-YAML/lib/CPAN/Meta/YAML.pm
index 746abd63bc..c55d7cd2d0 100644
--- a/cpan/CPAN-Meta-YAML/lib/CPAN/Meta/YAML.pm
+++ b/cpan/CPAN-Meta-YAML/lib/CPAN/Meta/YAML.pm
@@ -1,6 +1,7 @@
 use 5.008001; # sane UTF-8 support
 use strict;
 use warnings;
+no warnings 'experimental::builtin';
 package CPAN::Meta::YAML; # git description: v1.68-2-gcc5324e
 # XXX-INGY is 5.8.1 too old/broken for utf8?
 # XXX-XDG Lancaster consensus was that it was sufficient until
@@ -650,27 +651,29 @@ sub _dump_string {
     join '', map { "$_\n" } @lines;
 }
 
-sub _has_internal_string_value {
+# taken from cpan/JSON-PP/lib/JSON/PP.pm
+sub _looks_like_number {
     my $value = shift;
-    my $b_obj = B::svref_2object(\$value);  # for round trip problem
-    return $b_obj->FLAGS & B::SVf_POK();
+    no warnings 'numeric';
+    # if the utf8 flag is on, it almost certainly started as a string
+    return if utf8::is_utf8($value);
+    # detect numbers
+    # string & "" -> ""
+    # number & "" -> 0 (with warning)
+    # nan and inf can detect as numbers, so check with * 0
+    return unless length((my $dummy = "") & $value);
+    return unless 0 + $value eq $value;
+    return 1 if $value * 0 == 0;
+    return -1; # inf/nan
 }
 
 sub _dump_scalar {
     my $string = $_[1];
     my $is_key = $_[2];
-    # Check this before checking length or it winds up looking like a string!
-    my $has_string_flag = _has_internal_string_value($string);
     return '~'  unless defined $string;
     return "''" unless length  $string;
-    if (Scalar::Util::looks_like_number($string)) {
-        # keys and values that have been used as strings get quoted
-        if ( $is_key || $has_string_flag ) {
-            return qq['$string'];
-        }
-        else {
-            return $string;
-        }
+    if (_looks_like_number($string)) {
+        return qq['$string'];
     }
     if ( $string =~ /[\x00-\x09\x0b-\x0d\x0e-\x1f\x7f-\x9f\'\n]/ ) {
         $string =~ s/\\/\\\\/g;
@@ -800,9 +803,6 @@ sub errstr {
 # Helper functions. Possibly not needed.
 
 
-# Use to detect nv or iv
-use B;
-
 # XXX-INGY Is flock CPAN::Meta::YAML's responsibility?
 # Some platforms can't flock :-(
 # XXX-XDG I think it is.  When reading and writing files, we ought
@@ -822,35 +822,8 @@ sub _can_flock {
     }
 }
 
-
-# XXX-INGY Is this core in 5.8.1? Can we remove this?
-# XXX-XDG Scalar::Util 1.18 didn't land until 5.8.8, so we need this
-#####################################################################
-# Use Scalar::Util if possible, otherwise emulate it
-
-use Scalar::Util ();
 BEGIN {
-    local $@;
-    if ( eval { Scalar::Util->VERSION(1.18); } ) {
-        *refaddr = *Scalar::Util::refaddr;
-    }
-    else {
-        eval <<'END_PERL';
-# Scalar::Util failed to load or too old
-sub refaddr {
-    my $pkg = ref($_[0]) or return undef;
-    if ( !! UNIVERSAL::can($_[0], 'can') ) {
-        bless $_[0], 'Scalar::Util::Fake';
-    } else {
-        $pkg = undef;
-    }
-    "$_[0]" =~ /0x(\w+)/;
-    my $i = do { no warnings 'portable'; hex $1 };
-    bless $_[0], $pkg if defined $pkg;
-    $i;
-}
-END_PERL
-    }
+    *refaddr = *builtin::refaddr;
 }
 
 delete $CPAN::Meta::YAML::{refaddr};
diff --git a/cpan/CPAN-Meta/lib/CPAN/Meta/Merge.pm b/cpan/CPAN-Meta/lib/CPAN/Meta/Merge.pm
index 3604eae402..991f69d275 100644
--- a/cpan/CPAN-Meta/lib/CPAN/Meta/Merge.pm
+++ b/cpan/CPAN-Meta/lib/CPAN/Meta/Merge.pm
@@ -1,12 +1,13 @@
 use strict;
 use warnings;
+no warnings 'experimental::builtin';
 
 package CPAN::Meta::Merge;
 
 our $VERSION = '2.150010';
 
 use Carp qw/croak/;
-use Scalar::Util qw/blessed/;
+use builtin qw/blessed/;
 use CPAN::Meta::Converter 2.141170;
 
 sub _is_identical {
diff --git a/cpan/CPAN-Meta/lib/CPAN/Meta/Prereqs.pm b/cpan/CPAN-Meta/lib/CPAN/Meta/Prereqs.pm
index d4e93fd8a5..809da68d02 100644
--- a/cpan/CPAN-Meta/lib/CPAN/Meta/Prereqs.pm
+++ b/cpan/CPAN-Meta/lib/CPAN/Meta/Prereqs.pm
@@ -1,6 +1,7 @@
 use 5.006;
 use strict;
 use warnings;
+no warnings 'experimental::builtin';
 package CPAN::Meta::Prereqs;
 
 our $VERSION = '2.150010';
@@ -14,7 +15,6 @@ our $VERSION = '2.150010';
 #pod =cut
 
 use Carp qw(confess);
-use Scalar::Util qw(blessed);
 use CPAN::Meta::Requirements 2.121;
 
 #pod =method new
@@ -168,7 +168,12 @@ sub types_in {
 sub with_merged_prereqs {
   my ($self, $other) = @_;
 
-  my @other = blessed($other) ? $other : @$other;
+  eval 'require Scalar::Util';
+  my @other = unless($@){
+    Scalar::Util::blessed($other) ? $other : @$other;
+  }else{
+    builtin::blessed($other) ? $other : @$other;
+  }
 
   my @prereq_objs = ($self, @other);
 
diff --git a/cpan/JSON-PP/lib/JSON/PP.pm b/cpan/JSON-PP/lib/JSON/PP.pm
index fc8fcbc8f0..cda7b90c65 100644
--- a/cpan/JSON-PP/lib/JSON/PP.pm
+++ b/cpan/JSON-PP/lib/JSON/PP.pm
@@ -4,6 +4,7 @@ package JSON::PP;
 
 use 5.008;
 use strict;
+no warnings 'experimental::builtin';
 
 use Exporter ();
 BEGIN { our @ISA = ('Exporter') }
diff --git a/dist/Data-Dumper/Dumper.pm b/dist/Data-Dumper/Dumper.pm
index bb6d3caedb..0c2fde4743 100644
--- a/dist/Data-Dumper/Dumper.pm
+++ b/dist/Data-Dumper/Dumper.pm
@@ -11,6 +11,7 @@ package Data::Dumper;
 
 use strict;
 use warnings;
+no warnings 'experimental::builtin';
 
 #$| = 1;
 
@@ -125,8 +126,7 @@ sub new {
 # Packed numeric addresses take less memory. Plus pack is faster than sprintf
 
 sub format_refaddr {
-    require Scalar::Util;
-    pack "J", Scalar::Util::refaddr(shift);
+    pack "J", builtin::refaddr(shift);
 };
 
 #
@@ -282,9 +282,8 @@ sub _dump {
       warn "WARNING(Freezer method call failed): $@" if $@;
     }
 
-    require Scalar::Util;
-    my $realpack = Scalar::Util::blessed($val);
-    my $realtype = $realpack ? Scalar::Util::reftype($val) : ref $val;
+    my $realpack = builtin::blessed($val);
+    my $realtype = $realpack ? builtin::reftype($val) : ref $val;
     $id = format_refaddr($val);
 
     # Note: By this point $name is always defined and of non-zero length.
@@ -576,7 +575,7 @@ sub _dump {
     # here generates a different result. So there are actually "three" different
     # implementations of Data::Dumper (kind of sort of) but we only test two.
     elsif (!defined &_vstring
-       and ref $ref eq 'VSTRING' || eval{Scalar::Util::isvstring($val)}) {
+       and ref $ref eq 'VSTRING') {
       $out .= sprintf "v%vd", $val;
     }
     # \d here would treat "1\x{660}" as a safe decimal number