ijson

What's Changed

• Add FromIterator and serde_json conversions for IValue (#38) by @Diggsey in #39
• Add IObject <-> serde_json::Map conversions by @Diggsey in #40
• Add crates.io keywords and categories (#33) by @Diggsey in #41
• Store short strings inline instead of interning them (#24) by @Diggsey in #42
• Inline small values with a decimal number representation (#24) by @Diggsey in #43
• Update README and changelog for the inline-value representation by @Diggsey in #44

Full Changelog: 0.1.6...0.1.7

• Add FromIterator<T: Into<IValue>> for IValue (collects into an array) and FromIterator<(K: Into<IString>, V: Into<IValue>)> for IValue (collects into an object), mirroring serde_json::Value.
• Add From<serde_json::Value> for IValue and From<IValue> for serde_json::Value for smoother interoperability with serde_json.
• Add From<serde_json::Map<String, serde_json::Value>> for IObject and the reverse, matching the existing HashMap/BTreeMap/IndexMap conversions.
• Store small values — null, booleans, small numbers, and short strings — inline within the pointer-sized IValue, behind a widened 3-bit tag scheme. Small numbers are held as a mantissa * base^exp value (a base-2 binary float by default, so every inline number is exactly an f64), so most JSON numbers (integers, timestamps/ids, and short fractions such as 0.5 and 63.5) require no allocation or pointer indirection; only larger integers and out-of-range floats fall back to an 8-byte heap payload. Note: IString::as_str().as_ptr() is no longer stable across equal short strings, since they are no longer deduplicated to a shared allocation (value equality via == is unaffected).
• Add an opt-in arbitrary_precision feature that stores numbers as their exact decimal value (mantissa * 10^exp inline, or a heap arbitrary-precision decimal) instead of rounding to f64. With it enabled, values such as 0.1 are kept exactly, and integers and decimals beyond f64's range and precision become representable; deserialization routes through the same parser as str::parse, so a value round-trips exactly.

Full Changelog: 0.1.5...0.1.6

• Breaking: Remove Borrow<str> impl for IString by default. The impl violates the Borrow contract because IString hashes by pointer, not by contents, causing silent lookup failures in HashMap/HashSet when using &str keys. A broken-borrow-impl-compat feature flag is available as a temporary compatibility measure.

Full Changelog: 0.1.4...0.1.5

• Fix soundness issue when OOM occurs
• Implement Display for IString
• Bump versions of dependencies (except for dashmap, which removed necessary functionality)

• Fix potential undefined behavior on allocation failure.
• Update dependencies.

What's Changed

• Clean Clippy warnings by @gkorland in #12
• Correctly calculate offset to data following Header by @wesleywiser in #19
• Correct is_object typo. by @kjschiroo in #22
• upgrade to dashmap 5.4 by @gkorland in #25
• Added optional hash table indexmap in #28

New Contributors

• @gkorland made their first contribution in #12
• @wesleywiser made their first contribution in #19
• @kjschiroo made their first contribution in #22

Full Changelog: 0.1.3...0.1.4

• Add optional indexmap feature to enable conversion between IObject and IndexMap.
• Fix unsound offset calculation in internal Header layout.
• Fix is_object typo in into_object.
• Upgrade dashmap to 5.4.

• Add missing string de-serialization paths.
• Update dependencies.

• Fix incorrect interning of empty string.

• Fix bounds on short integer storage.
• Add CI and coverage measurement.

• Initial release: memory-efficient IValue replacement for serde_json::Value.
• Interned strings (IString) and numbers (INumber).
• Robin-hood hash table based IObject.
• IArray type.
• Full serde serialization/deserialization support.
• From/Into conversions for common types.