Bug adding non existed default value in patch

[TheWatcherCode]

Schema where no default value for objectType:

{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://example.com/main-schema", "type": "object", "properties": { "objectType": { "type": "string", "enum": [ "Table", "Chair", "Planner", "Apple", "Water" ] } }, "required": [ "objectType" ] }

Validate empty json witch patch:
ojson data, patch; compiledSchema.validate(data, patch);

Expected:
Empty patch

Actual:
Path is [{"op":"add","path":"/objectType","value":null}]

What compiler, architecture, and operating system?

• Compiler: gcc
• Architecture (e.g. x86, x64) x64
• Operating system: Linux

What jsoncons library version?

• Latest release 1.4.3

[TheWatcherCode]

In file include/jsoncons_ext/jsonschema/common/keyword_validator.hpp

In class class properties_validator

In function walk_result validate

variable default_value always have a value even when it should be std::nullopt

[danielaparker]

Fixed on master.