# 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-rapidyaml-event

 ok

cpp-yamlcpp-event

 ok

dotnet-yamldotnet-event

 ok

hs-hsyaml-event

 ok

js-yaml-event

 ok

nim-nimyaml-event

 ok

perl-pp-event

 ok

perl-refparser-event

 ok

py-pyyaml-event

 ok

py-ruamel-event

 ok

rust-yamlrust-event

 ok

c-libfyaml-json

 json_ok

dotnet-yamldotnet-json

 json_ok

go-yaml-json

 json_ok

hs-hsyaml-json

 json_ok

js-jsyaml-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

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.

hs-reference-yeast

 na
Line  Col Char Byte Token|Content
   1    0    0    0 +DOC |
   1    0    0    0 =HEAD|---
   1    3    3    3 +NODE|
   1    3    3    3 =EOL |\x0a
   2    0    4    4 +MAP |
   2    0    4    4 +PAIR|
   2    0    4    4 +NODE|
   2    0    4    4 +VAL |
   2    0    4    4 =TEXT|a
   2    1    5    5 -VAL |
   2    1    5    5 -NODE|
   2    1    5    5 =SYNX|:
   2    2    6    6 =WSPC|.
   2    3    7    7 +NODE|
   2    3    7    7 +PROP|
   2    3    7    7 +ANCH|
   2    3    7    7 =SYNX|&
   2    4    8    8 =META|anchor
   2   10   14   14 -ANCH|
   2   10   14   14 -PROP|
   2   10   14   14 +VAL |
   2   10   14   14 -VAL |
   2   10   14   14 -NODE|
   2   10   14   14 =EOL |\x0a
   3    0   15   15 -PAIR|
   3    0   15   15 +PAIR|
   3    0   15   15 +NODE|
   3    0   15   15 +VAL |
   3    0   15   15 =TEXT|b
   3    1   16   16 -VAL |
   3    1   16   16 -NODE|
   3    1   16   16 =SYNX|:
   3    2   17   17 =WSPC|.
   3    3   18   18 +NODE|
   3    3   18   18 +ALI |
   3    3   18   18 =SYNX|*
   3    4   19   19 =META|anchor
   3   10   25   25 -ALI |
   3   10   25   25 -NODE|
   3   10   25   25 =EOL |\x0a
   4    0   26   26 -PAIR|
   4    0   26   26 -MAP |
   4    0   26   26 -NODE|
   4    0   26   26 -DOC |

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.