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This release contains two breaking changes to recently added features.

Change to jsonpath::get function

• The return value for jsonpath::get has been changed from a pointer to the selected JSON value, or null if not found, to a std::pair<Json*,bool>, where the bool component indicates whether the get operation succeeded.

Change to new jsonschema classes and functions introduced in 0.174.0:

• The overload of json_schema<Json>::validate that takes a callback must now be passed a lambda that returns walk_result::advance or walk_result::abort. This supports early exit from validation.

Note that this change does not affect the legacy pre-0.174.0 jsonschema classes and functions (make_schema, json_validator).

Enhancement to jsonschema library:

• New json_schema member function walk for walking through the schema.

Defect fixes:

• Fixed issue #499 with nan_to_str, inf_to_str and neginf_to_str

Core library enhancements

• New json_options line_splits option that addresses issue #490

jsonpath library enhancements

• New function jsonpath::replace analagous to jsonpointer::replace, but for normalized paths.

jsonschema library enhancements

• The jsonschema extension now supports Drafts 4, 6, 2019-09 and 2020-12 in addition to Draft 07.

  • New function make_json_schema that returns a representation of a compiled JSON Schema document.

  • New class validation_message

  • The legacy function make_schema and classes json_validator and validation_output remain for backward compatibility, but have been deprecated.

Defect fixes

• Fixed issue #485 where basic_json member names did not use polymorphic_allocator

• Addressed issue #482 by replacing static_assert with runtime exception

Defect fixes:

• Made all member functions of jsoncons::range const

• Removed use of deduced return types in jsonpath extension (C++ 14 feature)

• Fixed issue #473 about bigint and -Werror=stringop-overflow

Defect fixes:

• Fixed issue #473 about bigint and -Werror=stringop-overflow

• Fixed jmespath issue #471 about jmespath::search and ojson with AddressSanitizer in macos environment

• Fixed jsonpointer issue with json_pointer::parse for empty string keys (which had implications for jsonschema definitions keyword with empty keys.)

• Fixed jsonschema issue with definitions keyword with empty keys

• Fixed jsonschema issue #474 about JSON Schema maximum keyword error message

• Fixed jsonschema issue with multipleOf keyword and type integer and multipleOf a floating point number

• Fixed jsonschema issue with the behavior of $id for rebasing in some keywords, particularly if, then, and else.

Enhancements:

• The jsonschema::make_schema functions now support providing a retrieval URI, to initialize the base URI.

Defect fixes:

• Fixed issue #470 concerning jsonpath::make_expression with ec broken

Defect fixes:

• Fixed issue #469 affecting JSMESPath expressions with terminating CR

Enhancements to jsonpath

• Added result_option sort_descending.

• Added new classes basic_json_location, basic_path_element, and basic_path_node.

• Added a new function get for selecting a single JSON value from a JSON document at a location represented by a json_location.

• Added a new function remove for removing a single JSON value from a JSON document at a location represented by a json_location.

• Added member function select to jsonpath_expression.

• Added member function select_paths to jsonpath_expression.

• Added member function update to jsonpath_expression, to support update-in-place for compiled JSONPath expressions.

Enhancements to jsonpointer:

• Added free functions to_string and to_wstring.

• Added append function to basic_json_pointer.

Defect fixes:

• Fixed issue #441 concerning misaligned allocation for string data.

• Fixed issue #436 concerning overflow warning.

• Changed internal variable names to avoid shadow warnings

• Fixed signature of dump_pretty #438

• Fixed basic_json_decode_options constructor #437

Enhancements:

• Improved error messages (with field names) for invalid type mappings when using the json_type_traits convenience macros.

• Support char8_t and u8string for C++ 20

• Added compare for bigint/bigdec/bigfloat as double or exact text match. This makes JSON Query work if you use options.lossless_number(true) for parsing JSON.