Returns

Features

- Provides a bunch of primitive interfaces to write your own containers
- Adds `.map_failure()` method
- Adds `flatten()` function to join nested containers

Bugfixes

- Fixes type of `Maybe.fix` and `Maybe.rescue` to work with both `lambda: 1` and `lambda _: 1`

Misc

- Improves `README`

Features

- Reintroduces the `Maybe` container, typed!
- Introduces converters from one type to another
- Adds `mypy` plugin to type decorators
- Complete rewrite of `Result` types
- Partial API change, now `Success` and `Failure` are not types, but functions
- New internal types introduced: `FixableContainer` and `ValueUnwrapContainer`

Bugfixes

- Fixes issue when you could return `IO` container from `Result.bind`
- Fixes `pipeline` return type

Misc

- Reapplied all types to `.py` files
- Improved docs about `IO` and `Container` concept
- Adds docs about container composition
- Moves from `Alpha` to `Beta`

Features

- Adds `IO` container
- Adds `unsafe` module with unsafe functions
- Changes how functions are located inside the project

Bugfixes

- Fixes container type in `pipeline`
- Now `is_successful` is public
- Now `raise_exception` is public

Misc

- Changes how `str()` function works for container types
- Total rename to "container" in the source code

Features

- `safe` and `pipeline` now supports `asyncio`
- `is_successful` now returns `Literal` types if possible

Features

- Adds `compose` helper function
- Adds public API to `import returns`
- Adds `raise_exception` helper function
- Adds full traceback to `.unwrap()`


Misc

- Updates multiple dev-dependencies, including `mypy`
- Now search in the docs is working again
- Relicenses this project to `BSD`
- Fixes copyright notice in the docs

Features

- Moves all types to `.pyi` files
- Renames all classes according to new naming pattern
- **HUGE** improvement of types
- Renames `fmap` to `map`
- Renames `do_notation` to `pipeline`, moves it to `functions.py`
- Renames `ebind` to `rescue`
- Renames `efmap` to `fix`
- Renames `container` to `Container`
- Removes `Maybe` container, since typing does not have `NonNullable` type