Elixir v1.12.0-rc.1 released

Elixir · April 24, 2021, 4:39pm

Release: Release v1.12.0-rc.1 · elixir-lang/elixir · GitHub

1. Enhancements

Elixir

[Code] Add Code.cursor_context/2 to return the context of a code snippet
[Module] Add Module.reserved_attributes/0 to list all reserved attributes by the language
[String] Update to Unicode 13.0

ExUnit

[ExUnit] Add ExUnit.async_run/0 and ExUnit.await_run/1

2. Bug fixes

Elixir

[Kernel] Do not ignore unimplemented signatures from generated functions
[Path] Do not crash when a volume is given to Path.absname/1, such as “c:”
[Protocol] Do not forbid defdelegate and defexception in protocol bodies - the restriction for defdelegate will be added back on v1.13 though (regression)

Checksums

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Docs.zip SHA1: 651b54b0bfa47c8503c3002d880d2e96898e768a
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Have fun!

nickurban · April 25, 2021, 4:13pm

Thanks team! Lots of good stuff in 1.12.

I’m particularly happy to see Kernel.then, which provides a standard way to pipe values into functions where the piped value does not take the first position in the function’s arguments.

github.com

elixir-lang/elixir/blob/v1.12/CHANGELOG.md

# Changelog for Elixir v1.12

Elixir v1.12 is out with improvements to scripting, tighter Erlang/OTP 24 integration, stepped ranges, and dozen of new functions across the standard library. Overall this is a small release, which continues our tradition of bringing Elixir developers quality of live improvements every 6 months.

This is the last release to support Erlang/OTP 21.

## Scripting improvements: `Mix.install/2` and `System.trap_signal/3`

Elixir v1.12 brings new conveniences for those using Elixir for scripting (via `.exs` files). Elixir has been capable of managing dependencies for a quite long time, but it could only be done within Mix projects. In particular, the Elixir team is wary of global dependencies as any scripts that rely on system packages are brittle and hard to reproduce whenever your system changes.

`Mix.install/2` is meant to be a sweetspot between single-file scripts and full-blown Mix projects. With `Mix.install/2`, you can list your dependencies on top of your scripts. When you execute the script for the first time, Elixir will download, compile, and cache your dependencies before running your script. Future invocations of the script will simply read the compiled artefacts from the cache:

```elixir
Mix.install([:jason])
IO.puts Jason.encode!(%{hello: :world})
```

`Mix.install/2` also performs protocol consolidation, which gives script developers an option to execute their code in the most performant format possible.

**Note:** `Mix.install/2` is currently experimental and it may change in future releases.

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