v3.9.0¶

Released on 2020-07-27.

Feature release adding four long-requested features. All changes are backward-compatible.

• Optional comment parsing in parse via the ignore_comments parameter.
• ordered_json to preserve the insertion order of object keys.
• An option to switch off implicit conversions.
• The NLOHMANN_DEFINE_TYPE_* convenience macros, plus high-precision-number support for UBJSON and CBOR tag handling.

Full release notes.

API changes¶

Added (6 pages):

• ordered_map
• basic_json: cbor_tag_handler_t
• macros: JSON_ASSERT, JSON_USE_IMPLICIT_CONVERSIONS, NLOHMANN_DEFINE_TYPE_INTRUSIVE, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE

Changed:

• basic_json::accept: Ignoring comments via ignore_comments added in version 3.9.0.
• basic_json::from_cbor: Added tag_handler parameter in version 3.9.0.
• basic_json::operator ValueType: Macros JSON_EXPLICIT/JSON_USE_IMPLICIT_CONVERSIONS added in version 3.9.0.
• basic_json::parse: Ignoring comments via ignore_comments added in version 3.9.0.
• basic_json::sax_parse: Ignoring comments via ignore_comments added in version 3.9.0.