ameliabarnabyhub b4a35dfd53 Throw type_error.321 when serializing discarded values to binary formats ...

The CBOR, MessagePack, UBJSON, BJData, and BSON writers silently
skipped the payload of a value_t::discarded value nested in an array
or object, while still writing its slot in the element/member count
(and, for BSON, its entry header), producing a binary document whose
declared size does not match what was actually written.

Throw type_error.321 instead, for a discarded value anywhere in the
tree, including at the top level.

Rewritten from the original PR against the current (non-recursive
option aside) binary_writer.hpp, which has changed substantially since
this was first proposed; the out_of_range.412 MessagePack size check
and unrelated test reformatting from that PR are dropped as out of
scope here.

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

2026-10-04 18:07:38 +02:00

..

nlohmann

Throw type_error.321 when serializing discarded values to binary formats

2026-10-04 18:07:38 +02:00