Enclosing member names in JSONPath

[0x777]

Current, aeson-0.10.0.0

Prelude M A> A.eitherDecode "{\"a.b\" : \"c\"}" :: Either String (M.HashMap String Int)
Left "Error in $.a.b: expected Int, encountered String"

Expected [ref]

Prelude M A> A.eitherDecode "{\"a.b\" : \"c\"}" :: Either String (M.HashMap String Int)
Left "Error in $.['a.b']: expected Int, encountered String"

A key, regardless of its contents, if defensively enclosed as ['key'], solves this problem. Otherwise, presence of . can be tested and key can be enclosed accordingly.

[bergmark]

I think this makes sense, I'd like keys to only be escaped if they contain a period.

[phadej]

I guess it makes sense to escape if the key isn't valid jsonpath identifier (cannot find a grammar by quick googling). At least ['escapeme'] key should be escaped (how?).

EDIT https://github.com/stevenalexander/antlr4-jsonpath-grammar/blob/master/JsonPath.g4 says INDENTIFIER : [a-zA-Z][a-zA-Z0-9]* ;