Niels Lohmann db1d0983e6 create objects for tokens that cannot be array indices (#5357) ...

When operator[](json_pointer) traverses a level that does not exist yet,
the null value is turned into an array or an object depending on the
reference token. The check only tested whether all characters are digits,
so tokens that can never be a valid array index selected an array and
then failed:

- "01" (and any other token with a leading '0') threw parse_error.106
- the empty token threw out_of_range.404

Both tokens are valid object keys, and both work when the level already
exists as an object, so creating the level changed the outcome. Test the
token against the RFC 6901, Sect. 4 grammar for array indices instead, so
that such tokens create an object. This only affects pointers that threw
before.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

2026-08-04 08:51:54 +02:00

..

nlohmann

create objects for tokens that cannot be array indices (#5357)

2026-08-04 08:51:54 +02:00