Extend JPath to accept quoted string references

[noelwelsh]

JPath syntax is now (roughly)

jPath := pathElement pathElement := id | quotedField | numericField id := .[a-zA-Z$][a-zA-Z$0-9] quotedField := ['quotedId'] | ["quotedId"] numericField := []

quotedId is a string with \ used as an escape character.

The first element of a jPath need not start with a . if it is an id

Example:

foo['bar bar']["black sheep"] is a valid reference into

{"foo": {"bar bar": {"black sheep": "aValue"}}}

[precog-zombie]

Can one of the admins verify this patch?

[noelwelsh]

Thanks!