optionalFieldOrNullWithOmittedDefault, optionalFieldOrNullWithOmittedDefault',
optionalFieldOrNullWithOmittedDefaultWith and
optionalFieldOrNullWithOmittedDefaultWith' now omit the key when the value
is the default value, as they document, instead of encoding null.
Both encodings parse back to the default value, so this changes the output
rather than what can be read.
unsafeUnboundedNaturalCodec no longer throws an arithmetic underflow when
it is given a negative number. It fails to parse instead.
Removed
The Result newtype and its instances.
Nothing used it: it was left over from the time codecs it was written for.
[0.6.0.0] - 2026-07-14
This is technically a breaking change but it’s unlikely that you’ll need to
change any of your codecs.
Thanks to Andreas Ländle (@alaendle) for contributing this feature.
Changed
Changed StringCodec to include StringBounds to represent the minimal/maximal length of a string.
Added
textWithBoundsCodec
stringWithBoundsCodec
[0.5.0.0] - 2025-06-20
This is technically a breaking change but it’s unlikely that you’ll need to
change any of your codecs.
Changed
Added the same Coercible trick to the RequiredKeyCodec constructor of a codec.
[0.4.2.2] - 2024-09-01
Added
boundedEnumCodec
[0.4.2.1] - 2024-08-21
Added
optionalFieldOrNullWithDefault
optionalFieldOrNullWithDefaultWith
optionalFieldOrNullWithDefault'
optionalFieldOrNullWithDefaultWith'
[0.4.2.0] - 2024-08-06
Added
HasCodec instances for DList and DNonEmpty from the dlist package.
[0.4.1.0] - 2024-08-03
Changed
Moved the ToJSON (Autodocodec a) and FromJSON (Autodocodec a) instances so they are no longer orphans.
[0.4.0.0] - 2024-07-26
This is technically a breaking change but it’s unlikely that you’ll need to
change any of your codecs.
Changed
Changed NumberBounds to Bounds and made both bounds optional.
Added IntegerCodec as distinct from NumberCodec to represent integers
effectively in documentation.
[0.3.0.0] - 2024-07-19
Added
HasCodec instances for:
Const
Dual
Semigroup.First
Semigroup.Last
Monoid.First
Monoid.Last
Changed
Refactored Codec so it’s input and output parameters have a representative, not nominal role.
This means one can now use deriving newtype with the HasCodec class.
Fixed infinitely looping Identity instance
Improve the documentation of time-related codecs to show <string> instead of <any>.
[0.2.3.0] - 2024-06-23
Added
Ord NumberBounds instance
[0.2.2.0] - 2023-11-20
Added
HasCodec Integer and HasCodec Natural instances.
[0.2.1.0] - 2023-10-06
Added
HasCodec a => HasCodec (Vector a) instance.
[0.2.0.6] - 2023-10-05
Added
Forward-compatibility with aeson >= 2.2.
[0.2.0.5] - 2023-08-27
Added
JSON Object-specific versions of encoding and decoding functions
Documentation about how ‘parseAlternative’ and ‘optionalField’ together can be a pitfall.
[0.2.0.4] - 2023-07-31
Added
The HasCodec Identity instance, thanks @clintonmead!
[0.2.0.3] - 2023-01-31
Added
The HasCodec Void instance, thanks @i-am-tom!
[0.2.0.2] - 2023-01-19
Changed
Compatibility with mtl-2.3.1
[0.2.0.1] - 2022-10-06
Added
The HasObjectCodec type class
[0.2.0.0] - 2022-07-21
Added
discriminatedUnionCodec for discriminated unions
[0.1.0.3] - 2022-07-14
Changed
Doctest fix
[0.1.0.2] - 2022-06-24
Added
scientificWithBoundsCodec for a NumberCodec with bounds but without a name.
[0.1.0.1] - 2022-05-03
Changed
Generalised the type of parseAlternative.
[0.1.0.0] - 2022-05-03
Changed
Generalise type of matchChoiceCodec to allow for two different input types.
Add disjoint versions of matchChoiceCodec and matchChoicesCodec.
Functions enumCodec, stringConstCodec, and shownBoundedEnumCodec now produce disjoint codecs.
[0.0.1.1] - 2022-04-26
Added
Compatibility with aeson >= 2.0.0.0
[0.0.1.0] - 2021-12-23
Changed
EitherCodec now takes a Union to specify whether the union is disjoint or not.
