Niels Lohmann 5cbb8e6d6c Assign the member that lookups find when set() meets duplicate keys ...

An editable document reads the last member of a repeated key (as the
read-only document does), but set(object, key, value) assigned the first
one: a view taken from object[key] before the call did not show the new
value. It now assigns the last member's value, keeps the key at the
position of its first occurrence (where materialize() puts it), and drops
the other members.

The seeded differential test now also edits documents whose objects
repeat keys and compares every lookup (operator[], at, find, value,
contains, count, and JSON pointers) with the parsed basic_json value.
A targeted test covers duplicates before and after edits that move the
object, in large objects with an index, in moved arrays, and in values
copied from other documents.

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

2026-10-09 17:30:30 +02:00

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nlohmann

Assign the member that lookups find when set() meets duplicate keys

2026-10-09 17:30:30 +02:00