# YAML Test Matrix

--- &test-4FJ6
  Title: Nested implicit complex keys
  Tags: [ complex-key, flow, mapping, sequence ]

YAML

---
[
  [ a, [ [[b,c]]: d, e]]: 23
]

Expected Events

+STR
+DOC ---
+SEQ []
+MAP {}
+SEQ []
=VAL :a
+SEQ []
+MAP {}
+SEQ []
+SEQ []
=VAL :b
=VAL :c
-SEQ
-SEQ
=VAL :d
-MAP
=VAL :e
-SEQ
-SEQ
=VAL :23
-MAP
-SEQ
-DOC
-STR

Expected JSON






   


c-libfyaml-event

 ok   



  


c-libyaml-event

 ok   



  


cpp-yamlcpp-event

 ok   



  


dotnet-yamldotnet-event

 ok   



  


hs-hsyaml-event

 ok   



  


java-snakeengine-event

 ok   



  


java-snakeyaml-event

 ok   



  


js-yaml-event

 ok   



  


nim-nimyaml-event

 ok   



  


perl-refparser-event

 ok   



  


py-pyyaml-event

 ok   



  


py-ruamel-event

 ok   



  


rust-yamlrust-event

 ok   



 
       


cpp-rapidyaml-event

 diff 


 Minimal Events:

+STR
+DOC ---
+SEQ
+MAP
+SEQ
=VAL :a
+SEQ
+MAP
+SEQ
+SEQ
=VAL :b
=VAL :c
-SEQ
-SEQ
=VAL :d
-MAP
=VAL :e
-SEQ
-SEQ
=VAL :23
-MAP
-SEQ
-DOC
-STR

  Transformed Events:

+STR
+DOC ---
+SEQ
+SEQ
=VAL :a
+SEQ
+SEQ
+SEQ
=VAL :b
=VAL :c
-SEQ
-SEQ
+MAP
=VAL :
=VAL :d
-MAP
=VAL :e
-SEQ
-SEQ
+MAP
=VAL :
=VAL :23
-MAP
-SEQ
-DOC
-STR

 Got Events:

+STR
+DOC ---
+SEQ
+SEQ
=VAL :a
+SEQ
+SEQ
+SEQ
=VAL :b
=VAL :c
-SEQ
-SEQ
+MAP
=VAL :
=VAL :d
-MAP
=VAL :e
-SEQ
-SEQ
+MAP
=VAL :
=VAL :23
-MAP
-SEQ
-DOC
-STR



 



 
       


perl-pp-event

 error 
+STR
+DOC ---
+SEQ []
+SEQ []
=VAL :a
+SEQ []
+SEQ []
+SEQ []
=VAL :b
=VAL :c
-SEQ
-SEQ
Line      : 3
Column    : 17
Expected  : EOL FLOWSEQ_END FLOW_COMMA WS
Got       : COLON
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ": d, e]]: 23\n"
  at /yaml/bin/perl-pp-event line 25.


 



  


perl-pp-perl

 error 
Line      : 3
Column    : 17
Expected  : EOL FLOWSEQ_END FLOW_COMMA WS
Got       : COLON
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ": d, e]]: 23\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.


 



  


perl-yaml-perl

 error 
YAML Error: Expected separator '---'
   Code: YAML_PARSE_ERR_NO_SEPARATOR
   Line: 2
   Document: 2
 at /perl5/lib/perl5/YAML/Loader.pm line 88.


 



  


py-pyyaml-py

 error 
Traceback (most recent call last):
  File "/yaml/bin/py-pyyaml-py", line 36, in <module>
    for doc in yaml.load_all(sys.stdin.read(), Loader=yaml.FullLoader):
  File "/python/lib/python3.7/site-packages/yaml/__init__.py", line 93, in load_all
    yield loader.get_data()
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 60, in construct_document
    for dummy in generator:
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 413, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 218, in construct_mapping
    return super().construct_mapping(node, deep=deep)
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 142, in construct_mapping
    "found unhashable key", key_node.start_mark)
yaml.constructor.ConstructorError: while constructing a mapping
found unhashable key
  in "<unicode string>", line 3, column 3:
      [ a, [ [[b,c]]: d, e]]: 23
      ^


 



  


py-ruamel-py

 error 
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-py", line 36, in <module>
    for doc in ruamel.yaml.load_all(sys.stdin.read(), Loader=ruamel.yaml.Loader):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/main.py", line 1097, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 114, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 131, in construct_document
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 674, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 445, in construct_mapping
    return BaseConstructor.construct_mapping(self, node, deep=deep)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 248, in construct_mapping
    key = self.construct_object(key_node, deep=True)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 668, in construct_yaml_seq
    data.extend(self.construct_sequence(node))
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in construct_sequence
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in <listcomp>
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 668, in construct_yaml_seq
    data.extend(self.construct_sequence(node))
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in construct_sequence
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in <listcomp>
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 674, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 445, in construct_mapping
    return BaseConstructor.construct_mapping(self, node, deep=deep)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 263, in construct_mapping
    if self.check_mapping_key(node, key_node, mapping, key, value):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 273, in check_mapping_key
    if key in mapping:
TypeError: unhashable type: 'list'


 



  


raku-yamlish-raku

 error 
Couldn't parse YAML
  in sub load-yamls at /raku/sources/44795C7AB0F35700F4CA9C3E2CC5C924EE4C608F (YAMLish) line 959
  in block <unit> at /yaml/bin/raku-yamlish-raku line 6


 



 
    


c-libfyaml-json

 na  
[
  {
]
stdin:3:3: error: Non scalar keys are not allowed in JSON emit mode
  [ a, [ [[b,c]]: d, e]]: 23
  ^~~~~~~~~~~~~~~~~~~~~~



 



  


dotnet-yamldotnet-json

 na  
[{? ["a", [{? [["b", "c"]] : "d"}, "e"]] : "23"}]



 



  


go-yaml-json

 na  
yaml: invalid map key: []interface {}{[]interface {}{"b", "c"}}



 



  


hs-hsyaml-json

 na  
[{"[\"a\",[{\"[[\\\"b\\\",\\\"c\\\"]]\":\"d\"},\"e\"]]":23}]



 



  


hs-reference-yeast

 na  
Line  Col Char Byte Token|Content
   1    0    0    0 +DOC |
   1    0    0    0 =HEAD|---
   1    3    3    3 =EOL |\x0a
   2    0    4    4 +NODE|
   2    0    4    4 +SEQ |
   2    0    4    4 =SYNX|[
   2    1    5    5 =EOL |\x0a
   3    0    6    6 =WSPC|..
   3    2    8    8 +MAP |
   3    2    8    8 +PAIR|
   3    2    8    8 +NODE|
   3    2    8    8 +SEQ |
   3    2    8    8 =SYNX|[
   3    3    9    9 =WSPC|.
   3    4   10   10 +NODE|
   3    4   10   10 +VAL |
   3    4   10   10 =TEXT|a
   3    5   11   11 -VAL |
   3    5   11   11 -NODE|
   3    5   11   11 =SYNX|,
   3    6   12   12 =WSPC|.
   3    7   13   13 +NODE|
   3    7   13   13 +SEQ |
   3    7   13   13 =SYNX|[
   3    8   14   14 =WSPC|.
   3    9   15   15 +MAP |
   3    9   15   15 +PAIR|
   3    9   15   15 +NODE|
   3    9   15   15 +SEQ |
   3    9   15   15 =SYNX|[
   3   10   16   16 +NODE|
   3   10   16   16 +SEQ |
   3   10   16   16 =SYNX|[
   3   11   17   17 +NODE|
   3   11   17   17 +VAL |
   3   11   17   17 =TEXT|b
   3   12   18   18 -VAL |
   3   12   18   18 -NODE|
   3   12   18   18 =SYNX|,
   3   13   19   19 +NODE|
   3   13   19   19 +VAL |
   3   13   19   19 =TEXT|c
   3   14   20   20 -VAL |
   3   14   20   20 -NODE|
   3   14   20   20 =SYNX|]
   3   15   21   21 -SEQ |
   3   15   21   21 -NODE|
   3   15   21   21 =SYNX|]
   3   16   22   22 -SEQ |
   3   16   22   22 -NODE|
   3   16   22   22 =SYNX|:
   3   17   23   23 =WSPC|.
   3   18   24   24 +NODE|
   3   18   24   24 +VAL |
   3   18   24   24 =TEXT|d
   3   19   25   25 -VAL |
   3   19   25   25 -NODE|
   3   19   25   25 -PAIR|
   3   19   25   25 -MAP |
   3   19   25   25 =SYNX|,
   3   20   26   26 =WSPC|.
   3   21   27   27 +NODE|
   3   21   27   27 +VAL |
   3   21   27   27 =TEXT|e
   3   22   28   28 -VAL |
   3   22   28   28 -NODE|
   3   22   28   28 =SYNX|]
   3   23   29   29 -SEQ |
   3   23   29   29 -NODE|
   3   23   29   29 =SYNX|]
   3   24   30   30 -SEQ |
   3   24   30   30 -NODE|
   3   24   30   30 =SYNX|:
   3   25   31   31 =WSPC|.
   3   26   32   32 +NODE|
   3   26   32   32 +VAL |
   3   26   32   32 =TEXT|23
   3   28   34   34 -VAL |
   3   28   34   34 -NODE|
   3   28   34   34 -PAIR|
   3   28   34   34 -MAP |
   3   28   34   34 =EOL |\x0a
   4    0   35   35 =SYNX|]
   4    1   36   36 -SEQ |
   4    1   36   36 -NODE|
   4    1   36   36 =EOL |\x0a
   5    0   37   37 -DOC |



 



  


java-snakeengine-json

 na  
[
  {
    "[a, [{[[b, c]]\u003dd}, e]]": 23
  }
]



 



  


java-snakeyaml-json

 na  
[
  {
    "[a, [{[[b, c]]\u003dd}, e]]": 23
  }
]



 



  


js-jsyaml-json

 na  
/node/node_modules/js-yaml/lib/loader.js:187
  throw generateError(state, message);
  ^
YAMLException: nested arrays are not supported inside keys (3:20)

 1 | ---
 2 | [
 3 |   [ a, [ [[b,c]]: d, e]]: 23
------------------------^
 4 | ]
    at generateError (/node/node_modules/js-yaml/lib/loader.js:183:10)
    at throwError (/node/node_modules/js-yaml/lib/loader.js:187:9)
    at storeMappingPair (/node/node_modules/js-yaml/lib/loader.js:320:9)
    at readFlowCollection (/node/node_modules/js-yaml/lib/loader.js:798:20)
    at composeNode (/node/node_modules/js-yaml/lib/loader.js:1442:11)
    at readFlowCollection (/node/node_modules/js-yaml/lib/loader.js:780:5)
    at composeNode (/node/node_modules/js-yaml/lib/loader.js:1442:11)
    at readFlowCollection (/node/node_modules/js-yaml/lib/loader.js:780:5)
    at composeNode (/node/node_modules/js-yaml/lib/loader.js:1442:11)
    at readBlockMapping (/node/node_modules/js-yaml/lib/loader.js:1104:12)



 



  


js-yaml-json

 na  
[
  {
    "[\n  a,\n  [\n      {\n          ? [ [ b, c ] ]\n          : d\n        },\n      e\n    ]\n]": 23
  }
]
(node:365) Warning: Keys with collection values will be stringified due to JS Object restrictions: "[ [ b, c ] ]". Set mapAsMap: true to use object keys.



 



  


lua-lyaml-json

 na  
luajit: /yaml/bin/lua-lyaml-json:8: Cannot serialise table: table key must be a number or string
stack traceback:
	[C]: in function 'encode'
	/yaml/bin/lua-lyaml-json:8: in main chunk
	[C]: at 0x563600454f97



 



  


perl-pp-json

 na  
Line      : 3
Column    : 17
Expected  : EOL FLOWSEQ_END FLOW_COMMA WS
Got       : COLON
Where     : /perl5/lib/perl5/YAML/PP/Parser.pm line 392
YAML      : ": d, e]]: 23\n"
  at /perl5/lib/perl5/YAML/PP/Loader.pm line 94.



 



  


perl-pplibyaml-json

 na  
[
   {
      "['a',[{'[[\\'b\\',\\'c\\']]' => 'd'},'e']]" : 23
   }
]



 



  


perl-pplibyaml-perl

 na  
[
  {
    '[\'a\',[{\'[[\\\'b\\\',\\\'c\\\']]\' => \'d\'},\'e\']]' => 23
  }
]



 



  


perl-syck-json

 na  
[
   {
      "ARRAY(0x55686af88510)" : 23
   }
]



 



  


perl-syck-perl

 na  
[
  {
    'ARRAY(0x55e35683af18)' => 23
  }
]



 



  


perl-tiny-json

 na  
YAML::Tiny failed to classify line '[' at /yaml/bin/perl-tiny-json line 12.



 



  


perl-xs-json

 na  
[
   {
      "ARRAY(0x5612e9d5d0c0)" : 23
   }
]



 



  


perl-xs-perl

 na  
[
  {
    'ARRAY(0x55d77e43ea58)' => 23
  }
]



 



  


perl-yaml-json

 na  
YAML Error: Expected separator '---'
   Code: YAML_PARSE_ERR_NO_SEPARATOR
   Line: 2
   Document: 2
 at /perl5/lib/perl5/YAML/Loader.pm line 88.



 



  


py-pyyaml-json

 na  
Traceback (most recent call last):
  File "/yaml/bin/py-pyyaml-json", line 19, in <module>
    for doc in yaml.load_all(sys.stdin.read(), Loader=yaml.FullLoader):
  File "/python/lib/python3.7/site-packages/yaml/__init__.py", line 93, in load_all
    yield loader.get_data()
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 45, in get_data
    return self.construct_document(self.get_node())
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 60, in construct_document
    for dummy in generator:
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 413, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 218, in construct_mapping
    return super().construct_mapping(node, deep=deep)
  File "/python/lib/python3.7/site-packages/yaml/constructor.py", line 142, in construct_mapping
    "found unhashable key", key_node.start_mark)
yaml.constructor.ConstructorError: while constructing a mapping
found unhashable key
  in "<unicode string>", line 3, column 3:
      [ a, [ [[b,c]]: d, e]]: 23
      ^



 



  


py-ruamel-json

 na  
Traceback (most recent call last):
  File "/yaml/bin/py-ruamel-json", line 19, in <module>
    for doc in ruamel.yaml.load_all(sys.stdin.read(), Loader=ruamel.yaml.Loader):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/main.py", line 1097, in load_all
    yield loader._constructor.get_data()
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 114, in get_data
    return self.construct_document(self.composer.get_node())
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 131, in construct_document
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 674, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 445, in construct_mapping
    return BaseConstructor.construct_mapping(self, node, deep=deep)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 248, in construct_mapping
    key = self.construct_object(key_node, deep=True)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 668, in construct_yaml_seq
    data.extend(self.construct_sequence(node))
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in construct_sequence
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in <listcomp>
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 668, in construct_yaml_seq
    data.extend(self.construct_sequence(node))
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in construct_sequence
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 225, in <listcomp>
    return [self.construct_object(child, deep=deep) for child in node.value]
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 154, in construct_object
    data = self.construct_non_recursive_object(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 196, in construct_non_recursive_object
    for _dummy in generator:
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 674, in construct_yaml_map
    value = self.construct_mapping(node)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 445, in construct_mapping
    return BaseConstructor.construct_mapping(self, node, deep=deep)
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 263, in construct_mapping
    if self.check_mapping_key(node, key_node, mapping, key, value):
  File "/python/lib/python3.7/site-packages/ruamel/yaml/constructor.py", line 273, in check_mapping_key
    if key in mapping:
TypeError: unhashable type: 'list'



 



  


raku-yamlish-json

 na  
Couldn't parse YAML
  in sub load-yamls at /raku/sources/44795C7AB0F35700F4CA9C3E2CC5C924EE4C608F (YAMLish) line 959
  in block <unit> at /yaml/bin/raku-yamlish-json line 6



 



  


ruby-psych-json

 na  
[{"[\"a\", [{[[\"b\", \"c\"]]=>\"d\"}, \"e\"]]":23}]



 



 
    


perl-tiny-perl

 ni 
YAML::Tiny failed to classify line '[' at /yaml/bin/perl-tiny-perl line 15.