Bracket notation with quoted root literal

Setup

Selector: $['$']

{
    "$": "value",
    "another": "entry"
}

Results

Consensus

[
  "value"
]

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).

"value"

Other responses

Bash (JSONPath.sh)

[]

Elixir (jaxon)

[]

JavaScript (jsonpath-plus)

[
  {
    "$": "value",
    "another": "entry"
  }
]

Python (jsonpath2)

Not supported

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

Rust (jsonpath)

Not supported

parsing error

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 4.
	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

• ¹ This implementation returns a single value where only one match is possible (instead of an array of a single value).
• ² This implementation returns a specific not found value if no match exists.
• ³ This implementation returns a specific not found value if a query that would regularly return a single match results in no match.