What's Changed

• Improve duplicate key warning and errors to include the key name and point to the right caller.

Full Changelog: v2.13.1...v2.13.2

What's Changed

• Fix support for older compilers without __builtin_cpu_supports.

Full Changelog: v2.13.0...v2.13.1

What's Changed

• Add new allow_duplicate_key parsing options. By default a warning is now emitted when a duplicated key is encountered.
  In json 3.0 an error will be raised.
• Optimize parsing further using SIMD to scan strings.

Full Changelog: v2.12.2...v2.13.0

• Fix compiler optimization level.

Full Changelog: v2.12.1...v2.12.2

What's Changed

• Fix a potential crash in large negative floating point number generation.
• Fix for JSON.pretty_generate to use passed state object's generate instead of state class as the required parameters aren't available.

Full Changelog: v2.12.0...v2.12.1

What's Changed

• Improve floating point generation to not use scientific notation as much.
• Include line and column in parser errors. Both in the message and as exception attributes.
• Handle non-string hash keys with broken to_s implementations.
• JSON.generate now uses SSE2 (x86) or NEON (arm64) instructions when available to escape strings.

Full Changelog: v2.11.3...v2.12.0

What's Changed

• Fix a regression in JSON.pretty_generate that could cause indentation to be off once some #to_json has been called.

Full Changelog: v2.11.2...v2.11.3

What's Changed

• Bring back JSON::PRETTY_STATE_PROTOTYPE with a deprecation

Full Changelog: v2.11.1...v2.11.2

What's Changed

• Add back JSON.restore, JSON.unparse, JSON.fast_unparse and JSON.pretty_unparse.
  These were deprecated 16 years ago, but never emited warnings, only undocumented, so are
  still used by a few gems.

Full Changelog: v2.11.0...v2.11.1

What's Changed

• Optimize Integer generation to be ~1.8x faster.
• Optimize Float generation to be ~10x faster.
• Fix JSON.load proc argument to substitute the parsed object with the return value.
  This better match Marshal.load behavior.
• Deprecate JSON.fast_generate (it's not any faster, so pointless).
• Deprecate JSON.load_default_options.
• Deprecate JSON.unsafe_load_default_options.
• Deprecate JSON.dump_default_options.
• Deprecate Kernel#j
• Deprecate Kernel#jj
• Remove outdated JSON.iconv.
• Remove Class#json_creatable? monkey patch.
• Remove deprecated JSON.restore method.
• Remove deprecated JSON.unparse method.
• Remove deprecated JSON.fast_unparse method.
• Remove deprecated JSON.pretty_unparse method.
• Remove deprecated JSON::UnparserError constant.
• Remove outdated JSON::MissingUnicodeSupport constant.

Full Changelog: v2.10.2...v2.11.0