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# Changelog
`hslua-objectorientation` uses [PVP Versioning][].
## hslua-objectorientation-2.5.0
Released 2026-01-08.
- Removed function `udDocs`. It is not very useful and appears to
be unused.
- Allow *hslua-typing* 0.2.\*.
## hslua-objectorientation-2.4.0
Released 2025-06-23.
- The code has been reorganized: the new submodules
`HsLua.ObjectOrientation.Generic` and
`HsLua.ObjectOrientation.ListType` have been added.
- The `UDTypeGeneric` type has been updated, the definitions for
Lua types can now contain additional hooks to modify the
behavior when initializing the type and when pushing and
pulling objects to and from Lua.
- The function `pushUDGeneric` is modified and no longer takes a
`pushDocs` parameter. Use the new type hooks instead.
- Removed the extra hook from `initTypeGeneric` and renamed it
to `initType`. The hook, if one is needed, must now be part of
the UDTypeGeneric object.
- The default `__index` and `__newindex` functions have been
simplified and no longer handle integer keys. Consequently,
list-like types now need their own `__index` and `__newindex`
functions. These can handle numerical indices and fall back to
the default functions for other keys.
The new file `hslobj.h` contains the headers of the default
access functions. It is added to the `install-includes` cabal
field.
## hslua-objectorientation-2.3.1
Released 2024-01-18.
- Relaxed upper bound for text, containers, and bytestring,
allowing text-2.1, containers-0.7, and bytestring-0.12.
## hslua-objectorientation-2.3.0
Released 2023-03-13.
- Export all constructors and functions of type `Property`.
- Renamed `peekUD` to `peekUDGeneric` and `pushUD` to
`pushUDGeneric`. Functions with the old names are now
now defined hslua-packaging.
- Hook for udtype metatable initializer. The function
`pushUDGeneric` takes an additional `hook` parameter. The hook
operation can be used to perform additional setup operations,
e.g., for documentation.
The old `pushUD` function can be recovered with
pushUD = pushUDGeneric (\_ -> pure ())
The `hslua-packaging` now exports a `pushUD` functions that is
specialized to documented types.
- Export new function `initTypeGeneric`: The function ensures
that a type's metatable is initialized and available from the
registry. Just like with `pushUDGeneric`, a hook can be used
to augment the initialization.
- Type info for properties: Properties are amended with
information on the property's type. The functions `property`,
`possibleProperty`, and `readonly` each now come with typed
version `property'`, `possibleProperty'`, and `readonly`'.
This allows to specify the type of a property value.
- Functions for object typing info: The functions `udDocs` and
`udTypeSpec` are added, enabling the generation of typing
information for UDType objects.
## hslua-objectorientation-2.2.1
Released 2022-06-19.
- Require hslua-core-2.2.1.
- Require hslua-marshalling-2.2.1.
## hslua-objectorientation-2.2.0.1
Released 2022-05-20.
- Relax upper bound for mtl, allow mtl-2.3.
## hslua-objectorientation-2.2.0
Released 2022-02-19.
- Require version 2.2 of hslua-core and hslua-marshalling.
## hslua-objectorientation-2.1.0
Released 2022-01-29.
- Allow integers as aliases: Aliases can now be of type
`AliasIndex`, so integers can now be defined as aliases for
other properties. The function `alias` now takes an
`AliasIndex` instead of a `Name`; the change entails
modifications to the types `UDTypeWithList`, `UDType`, and
`Member`. Also, `AliasIndex` is made into an instance of the
Eq and Ord type classes.
- Reworked list representation of objects, allowing write access
to list components.
The `ListSpec` type has been updated and contains now a pair
of pairs, where the inner pairs define how to push and
retrieve lists, respectively. Users of the `deftypeGeneric'`
function will have to update their code.
- Fixed some integer type declarations in C code. Some variables
had been given incorrect types, like `int` instead of
`lua_Integer`. They are usually the same, but may differ in
some setups.
- Require hslua-core-2.1.0 and hslua-marshalling-2.1.0, or
later.
## hslua-objectorientation-2.0.1
Released 2021-11-04.
- Excludes absent properties from `pairs`: Properties that are
optional and not present in a sum-type value are no longer
included in the iterator output produced by `pairs` (i.e., the
`__pairs` metamethod). Previously, the names of absent
properties were pushed with a `nil` value.
## hslua-objectorientation-2.0.0
Released 2021-10-21.
- Published without warning.
[PVP Versioning]: https://pvp.haskell.org
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