# YAML Test Matrix

--- &test-6KGN
  Title: Anchor for empty node
  Tags: [ alias, anchor ]

YAML

---
a: &anchor
b: *anchor

Expected Events

+STR
+DOC ---
+MAP
=VAL :a
=VAL &anchor :
=VAL :b
=ALI *anchor
-MAP
-DOC
-STR

Expected JSON

{
"a": null,
"b": null
}

c-libfyaml-event

 ok

c-libyaml-event

 ok

cpp-yamlcpp-event

 ok

dotnet-yamldotnet-event

 ok

hs-hsyaml-event

 ok

java-snakeyaml-event

 ok

js-yaml-event

 ok

nim-nimyaml-event

 ok

perl-pp-event

 ok

perl-pplibyaml-event

 ok

py-pyyaml-event

 ok

py-ruamel-event

 ok

c-libfyaml-json

 json_ok

dotnet-yamldotnet-json

 json_ok

hs-hsyaml-json

 json_ok

js-yaml-json

 json_ok

perl-pp-json

 json_ok

perl-pplibyaml-json

 json_ok

perl-syck-json

 json_ok

perl-xs-json

 json_ok

py-pyyaml-json

 json_ok

py-ruamel-json

 json_ok

ruby-psych-json

 json_ok

java-snakeyaml-json

 json_diff
{}

js-jsyaml-json

 json_diff
{
  "a": null,
  "b": []
}

lua-lyaml-json

 json_diff
{
  "a": {},
  "b": {}
}

perl-yaml-json

 error
YAML Error: No anchor for alias '*anchor'
   Code: YAML_PARSE_ERR_NO_ANCHOR
   Line: 3
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 152.

perl-yaml-perl

 error
YAML Error: No anchor for alias '*anchor'
   Code: YAML_PARSE_ERR_NO_ANCHOR
   Line: 3
   Document: 1
 at /perl5/lib/perl5/YAML/Loader.pm line 152.

perl-pp-perl

 na
{
  'a' => undef,
  'b' => undef
}

perl-pplibyaml-perl

 na
{
  'a' => undef,
  'b' => undef
}

perl-syck-perl

 na
{
  'a' => undef,
  'b' => undef
}

perl-xs-perl

 na
{
  'a' => undef,
  'b' => ${\$VAR1->{'a'}}
}

py-pyyaml-py

 na
{'a': None, 'b': None}

py-ruamel-py

 na
{'a': None, 'b': None}

perl-tiny-json

 ni
YAML::Tiny does not support a feature in line '&anchor' at /yaml/bin/perl-tiny-json line 12.

perl-tiny-perl

 ni
YAML::Tiny does not support a feature in line '&anchor' at /yaml/bin/perl-tiny-perl line 15.