# Enso 0.2.5 (2021-02-26)

## Interpreter/Runtime

- Fixed an issue where the parser would crash on partial inputs, causing issues
  for both the engine and IDE
  ([#1509](https://github.com/enso-org/enso/pull/1509)).
- Fixed a problem where `Type_Error`s would not be displayed properly when
  pretty printed ([#1504](https://github.com/enso-org/enso/pull/1504)).
- Fixed an issue with `_` desugaring where it would not desugar correctly when
  used in function position
  ([#1512](https://github.com/enso-org/enso/pull/1512)).

## Tooling

- Fixed an issue where suggestions were sometimes not being provided for modules
  other than `Base` ([#1507](https://github.com/enso-org/enso/pull/1507)).
- Fixed a few issues where expression and value updates were not sent when they
  should be ([#1516](https://github.com/enso-org/enso/pull/1516),
  [#1522](https://github.com/enso-org/enso/pull/1522), and
  [#1508](https://github.com/enso-org/enso/pull/1508)).

## Libraries

- Fixed a bug where sorting boolean columns in a `Table` would produce incorrect
  output ([#1505](https://github.com/enso-org/enso/pull/1505)).

## Known Issues

- This is a beta release, so please see the
  [issue tracker](https://github.com/enso-org/enso/issues?q=is%3Aissue+is%3Aopen+created%3A%3C2021-02-26)
  for issues opened before the release date.

# Enso 0.2.4 (2021-02-23)

## Interpreter/Runtime

- Fixed another issue where dependency analysis was operating at too fine a
  granularity ([#1495](https://github.com/enso-org/enso/pull/1495)).
- Moved all user-facing errors to in-Enso errors, allowing them to be presented
  properly in the IDE, and interacted with by users
  ([#1487](https://github.com/enso-org/enso/pull/1487)).

## Tooling

- Fixed an issue where the runtime server would not send correct expression
  payloads for dataflow errors
  ([#1484](https://github.com/enso-org/enso/pull/1484)).

## Libraries

- Added "pretty" representations to all Error types, allowing for better display
  in the IDE ([#1498](https://github.com/enso-org/enso/pull/1498)).
- Updated the Table library with a raft of additional features
  ([#1489](https://github.com/enso-org/enso/pull/1489)). This includes table
  concatenation, direct indexing and column aggregation, as well as a general
  clean-up of the API pre-stabilisation.
- Added a flexible sorting mechanism to the Table library
  ([#1471](https://github.com/enso-org/enso/pull/1471)).

## Known Issues

- This is a beta release, so please see the
  [issue tracker](https://github.com/enso-org/enso/issues?q=is%3Aissue+is%3Aopen+created%3A%3C2021-02-23)
  for issues opened before the release date.

# Enso 0.2.3 (2021-02-15)

## Tooling

- Improved the robustness of the project manager and language server in the
  presence of rapid restarts
  ([#1463](https://github.com/enso-org/enso/pull/1463)).

## Libraries

- Significantly improved the efficiency of visualising large tables through
  zero-cost translation to Enso's vectors
  ([#1476](https://github.com/enso-org/enso/pull/1476)).

## Known Issues

- This is a beta release, so please see the
  [issue tracker](https://github.com/enso-org/enso/issues?q=is%3Aissue+is%3Aopen+created%3A%3C2021-02-15)
  for issues opened before the release date.

# Enso 0.2.2 (2021-02-11)

## Language

- Significantly improved the way that dataflow errors and panics are handled in
  the interpreter. They now flow through the program in a far more seamless
  fashion, and panics are supported properly in the IDE without the whole
  program dying ([#1433](https://github.com/enso-org/enso/pull/1433)).
- Significantly improved the syntax and semantics for FFI with JVM languages,
  making it far more of a first-class citizen in Enso
  ([#1443](https://github.com/enso-org/enso/pull/1443)).
- Added support for polyglot JavaScript definitions to Enso
  ([#1451](https://github.com/enso-org/enso/pull/1451)). These allow users to
  write JavaScript inside Enso, and seamlessly call between Enso and JS code.

## Interpreter/Runtime

- Fixed an issue where executing a host value could result in a
  `NullPointerException` due to a missing null check
  ([#1413](https://github.com/enso-org/enso/pull/1413)).
- Fixed an issue where dataflow analysis was incorrectly tracking usages of
  undefined variables. This resulted in problems for the runtime server
  ([#1421](https://github.com/enso-org/enso/pull/1421)).

## Tooling

- Added support for collection of profiling information about the running
  program to the language server protocol
  ([#1407](https://github.com/enso-org/enso/pull/1407)). Initial support is for
  collection of execution-time information.
- Updated the default `main` in a new Enso project to be more IDE friendly
  ([#1419](https://github.com/enso-org/enso/pull/1419)).
- Added support for panic sentinels in the runtime instrument, allowing the
  language server to trace the expressions affected by a panic while still
  executing others ([#1436](https://github.com/enso-org/enso/pull/1436)).
- Added support for checking the Enso version for a particular project in the
  project manager, allowing the IDE to improve compatibility with multiple
  versions ([#1454](https://github.com/enso-org/enso/pull/1454)).

## Libraries

- Updated the way that we use dataflow errors in the standard libraries, making
  our `Base` functionality much more amenable to working in the IDE
  ([#1446](https://github.com/enso-org/enso/pull/1446)).

## Known Issues

- This is a beta release, so please see the
  [issue tracker](https://github.com/enso-org/enso/issues?q=is%3Aissue+is%3Aopen+created%3A%3C2021-02-10)
  for issues opened before the release date.

# Enso 0.2.1 (2021-01-15)

## Language

- Removed Uniform Function Call Syntax, making the language much more
  predictable and allowing the compiler to provide improved diagnostics for
  common mistakes.

## Interpreter/Runtime

- Return correct qualified names for modules at runtime, ensuring that the
  compiler and interpreter agree.

## Tooling

- Improve the handling of bundled components with the Project Manager, ensuring
  rapid startup and easy integration with the IDE.
- Fixed the reflection configuration for the Project Manager, fixing a bug where
  it was unable to extract archives on Windows.
- The Language Server now uses qualified names in its messages, fixing a class
  of bugs where the IDE and Tooling did not agree on what a given expression
  was.
- Fixed mis-handling of tags in the documentation parsing infrastructure.

## Libraries

- Implemented a stub file for the functionality built into the interpreter. This
  allows us to provide comprehensive documentation about this functionality for
  display in the IDE and for reading by library users.
- Added aggregation functionality to the Table library, allowing users to group
  their data.

## Known Issues

- This is a beta release, so please see the
  [issue tracker](https://github.com/enso-org/enso/issues?q=is%3Aissue+is%3Aopen+created%3A%3C2021-01-15)
  for issues opened before the release date.

# Enso 0.2.0 (2021-01-05)

## Language

The initial version of the Enso language, with most language features
functioning.

- Flexible and concise syntax for the construction of functional programs,
  including pattern matching and lambdas.
- Support for currying, named and defaulted arguments, and operator sections.
- Support for user-defined data-types with fields and dynamically-dispatched
  methods on them.
- Importing and working with Java code in a seamless fashion using polyglot
  imports.
- Functional monadic state and error handling, through the use of data errors
  and panics.
- Opt-in tail-call optimisation.

## Interpreter/Runtime

- The initial version of the interpreter and runtime.

## Type System

- Nothing.

## Tooling

- The initial version of the Enso Launcher and Project Manager, supporting:
  - Installation and management of Enso releases, and the GraalVM runtimes on
    which they depend.
  - Aggregation of logs from the various Enso service components.
  - Basic project management functionality.
  - Initialisation and set-up of a language server for a specific project.
- The initial version of the Enso Language Server, supporting:
  - Dynamic introspection and modification of the running Enso program.
  - Caching of intermediate values in computations, ensuring that only necessary
    parts of the program are recomputed on a change.
  - Intelligent suggestions based on semantic analysis of the code.
  - Attaching visualisation code to values in the running Enso program.

## Libraries

- The initial version of `Base`, the core library, supporting:
  - Functionality for working with core types like `Integer`, `Decimal`, and
    `Text`.
  - Common data structures such as `List`, `Vector`, and `Map`.
  - Support for working with `JSON` data.
  - Support for working with `HTTP` endpoints.
  - Support for interacting with files and processes on the local machine.
  - Support for working with polyglot entities.
  - Support for metaprogramming the Enso language.
- The initial version of the Enso `Table` library for working with tabular data.
- The initial version of the Enso `Test` library, containing testing and
  benchmarking utilities.

## Stabilised Features

- A list of stabilised APIs and/or features.

## Misc

- Nothing.

## Known Issues

- This is a beta release, so please see the issue tracker for issues opened
  before the release date.

## Internal Only

- Nothing