Filter expression with equals string with unicode character escape

Setup

Selector: $[?(@.key=="Mot\u00f6rhead")]

[
  {"key": "something"},
  {"key": "Mot\u00f6rhead"},
  {"key": "mot\u00f6rhead"},
  {"key": "Motorhead"},
  {"key": "Motoo\u0308rhead"},
  {"key": "motoo\u0308rhead"}
]

Results

Other responses

Bash (JSONPath.sh) 

[]

C (json-glib)

Not supported

Unable to compile selector `$[?(@.key=="Mot\u00f6rhead")]': Invalid array index definition “?(@.key=="Mot\u00f6rhead")]”

Clojure (json-path) ¹ 

[]

Cpp (jsoncons) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Dart (json_path) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Elixir (ExJsonPath) 

[]

Elixir (jaxon) 

[]

Elixir (warpath) ¹ 

[]

Erlang (ejsonpath) 

[]

Golang (github.com-PaesslerAG-jsonpath) ¹ 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Golang (github.com-bhmj-jsonslice) ¹ ³ 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Golang (github.com-ohler55-ojg) 

[]

Golang (github.com-oliveagle-jsonpath) ¹ 

[]

Golang (github.com-spyzhov-ajson) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Golang (github.com-vmware-labs-yaml-jsonpath) 

[]

Haskell (jsonpath)

Not supported

Invalid JSONPath: $[?(@.key=="Mot\u00f6rhead")]
 Error: 1:16:
  |
1 | $[?(@.key=="Mot\u00f6rhead")]
  |                ^
unexpected '\'
expecting '!', '"', literal character, or white space

JavaScript (Goessner) ² 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

JavaScript (brunerd) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

JavaScript (jsonpath) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

JavaScript (jsonpath-plus) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Java (com.github.jsurfer) 

[]

Java (com.jayway.jsonpath) ¹ ³ 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Kotlin (com.nfeld.jsonpathkt) ¹

Not supported

Unexpected char, char=?, index=2

Objective-C (SMJJSONPath) ¹ ³ 

[]

PHP (galbar-jsonpath) 

[]

PHP (remorhaz-jsonpath)

Not supported

Error: 'Failed to build AST from JSONPath query: $[?(@.key=="Mot\u00f6rhead")]'

PHP (softcreatr-jsonpath) 

[]

Python (jsonpath) ² 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

Python (jsonpath-ng)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath-rw)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath2)

Not supported

line 1:10 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}
ValueError("line 1:10 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}")

Raku (JSON-Path)

Not supported

Evaluation of embedded Perl 6 code not allowed (construct with :allow-eval)

Ruby (jsonpath) 

[]

Rust (jsonpath)

Not supported

parsing error

Rust (jsonpath_lib) 

[]

Rust (jsonpath_plus) 

[]

Scala (jsonpath) 

[]

Swift (Sextant) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

dotNET (Json.NET)

Not supported

Unexpected character while parsing path query: "

dotNET (JsonCons.JsonPath) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

dotNET (JsonPath.Net) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

dotNET (JsonPathLib) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

dotNET (Manatee.Json) 

[
  {
    "key": "Mot\u00f6rhead"
  }
]

JSON (Path_Reference_Implementation)

Not supported

 --> 1:3
  |
1 | $[?(@.key=="Mot\u00f6rhead")]
  |   ^---
  |
  = expected unionChild, unionArrayIndex, or sliceStart

Proposal (A) 

[]

Errors

PHP (Goessner) ² 

ArgumentCountError

Perl (JSON-Path) 

non-safe evaluation, died at main.pl line 11.

Footnotes