# Changelog

## 1.0.0

### Breaking

- PHP 8.2 or newer is required.
- Contributors need PHPUnit 11 to run the test suite.

### Added

- `compile()` and `Compilable`: partials, curried and fixed functions, pipes and predicates flatten into plain closures once, so hot loops don't go through their `__invoke()`. Compiled internal functions drop extra arguments.
- Collections in `Kadet\Functional\Collections`: transforms (map, filter and friends), queries, and collectors with grouping. The transforms also come lazy, returning generators, in `Kadet\Functional\Collections\Lazy`; queries and collectors accept lazy input and end a lazy chain.
- Collection callbacks get `($value, $key)`, except internal functions and callables declaring one parameter, which get only the value. Wrappers (`partial()`, `memoize()`, predicates, `pipe()`) are seen through to the function they call.
- `php-ds` is suggested for the collections. `DsUnavailableException` is thrown when it is needed but not installed.
- `EmptyCollectionException` is thrown by queries that need an element when the collection has none (or none matching).
- Docblock types and generics, so static analysis understands collection contents.

### Fixed

- `not()` and `Predicate::not()` predicates return the negated predicate from `getDecorated()` instead of null.
- `closure()` and `ref()` accept static method callables like `[Foo::class, 'method']`.