# v3.8.0

Released on 2020-06-14.

Feature release. All changes are backward-compatible.

- Introduces a [binary value](../../features/binary_values.md) type that is read from and written to
  [CBOR](../../features/binary_formats/cbor.md), [BSON](../../features/binary_formats/bson.md), and
  [MessagePack](../../features/binary_formats/messagepack.md), and can be shared between formats.
- Generalizes the input adapters to read from any `LegacyInputIterator` container (3–10 % faster
  parsing).
- Fixes [`contains`](../../api/basic_json/contains.md) for JSON pointers and makes the binary
  [`from_cbor`](../../api/basic_json/from_cbor.md)/[`from_msgpack`](../../api/basic_json/from_msgpack.md)/etc.
  functions respect `allow_exceptions`.

[Full release notes](https://github.com/nlohmann/json/releases/tag/v3.8.0).

## API changes

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