Wildcards in query argument to `fparse()`

[gacolitti]

Is it possible to add the ability to use wildcards in the query arg to fparse() and fload()?

For example:

json <- '{
  "entries": [
    { "entryKey": "12345" },
    { "entryKey": "67890" },
    { "entryKey": "54321" }
  ]
}'

# Extract the entryKey from the first entry
RcppSimdJson::fparse(json, query = "/entries/0/entryKey")

# Extract the entryKey from the second entry
RcppSimdJson::fparse(json, query = "/entries/1/entryKey")

# Extract the entryKey from the third entry
RcppSimdJson::fparse(json, query = "/entries/2/entryKey")

# Extract all entry keys using wildcard (doesn't work)
# RcppSimdJson::fparse(json, query = "/entries/*/entryKey")

[eddelbuettel]

The 'globbing', i.e. the expansion of the wild card has to happen somewhere, and I do not think the simdjson library is set up for it. @lemire can correct me here but I don't think I am overlooking anything.