Bracket notation with quoted closing bracket literal

Setup

Selector: $[']']

{"]": 42}

Results

Consensus

[
  42
]

Scalar consensus

The scalar consensus applies for implementations which return a single value where only one match is possible (instead of an array of a single value).

42

Other responses

Bash (JSONPath.sh) 

[]

Elixir (jaxon) 

[]

JavaScript (jsonpath-plus) 

[]

PHP (galbar-jsonpath)

Not supported

Invalid JSONPath error: 'Error in JSONPath near ''''

PHP (softcreatr-jsonpath)

Not supported

Error: 'Unable to parse token ' in expression: [']']'

Python (jsonpath) ² 

[
  {
    "]": 42
  }
]

Python (jsonpath2)

Not supported

line 1:2 token recognition error at: '''
ValueError("line 1:2 token recognition error at: '''")

Ruby (jsonpath)

Not supported

unmatched closing bracket

Rust (jsonpath)

Not supported

parsing error

dotNET (JsonPathLib) 

[
  {
    "]": 42
  }
]

Errors

Clojure (json-path) ¹ 

java.lang.Exception object must be an array.

Golang (github.com-oliveagle-jsonpath) ¹ 

strconv.Atoi: parsing "'": invalid syntax

Perl (JSON-Path) 

Assertion ("]" is not an operator) failed!
 at build/lib/perl5/Carp/Assert.pm line 282, <STDIN> line 1.
	Carp::Assert::assert(...) called at build/lib/perl5/JSON/Path/Evaluator.pm line 215
	JSON::Path::Evaluator::_evaluate(...) called at build/lib/perl5/JSON/Path/Evaluator.pm line 120
	JSON::Path::Evaluator::evaluate(...) called at build/lib/perl5/JSON/Path/Evaluator.pm line 93
	JSON::Path::Evaluator::evaluate_jsonpath(...) called at build/lib/perl5/JSON/Path.pm line 103
	JSON::Path::values(...) called at main.pl line 11

Footnotes