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CHANGELOG.md

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Changelog for Elixir v1.14

Elixir v1.14 requires Erlang/OTP 23+.

PartitionSupervisor

TODO.

Improved errors on binaries and evaluation

TODO.

Slicing with steps

TODO.

v1.14.0-dev

1. Enhancements

EEx

  • [EEx] Support multi-line comments to EEx via <%!-- --%>
  • [EEx] Add EEx.tokenize/2

Elixir

  • [Code] Emit deprecation and type warnings on Code.compile_string/2 and Code.compile_quoted/2
  • [Code] Warn if an outdated lexical tracker is given on eval
  • [Code] Add Code.env_for_eval/1 and Code.eval_quoted_with_env/3
  • [Code] Improve stacktraces from eval operations on Erlang/OTP 25
  • [Enum] Allow slicing with steps in Enum.slice/2
  • [Inspect] Improve error reporting when there is a faulty inspect implementation
  • [Inspect] Use expression-based inspection for Date.Range, MapSet, Version, and Version.Requirement
  • [Kernel] Allow any guard expression as the size of a bitstring in a pattern match
  • [Kernel] Allow composite types with pins as the map key in a pattern match
  • [Kernel] Print escaped version of control chars when they show up as unexpected tokens
  • [Kernel] Warn on confusable non-ascii identifiers
  • [Kernel] Add .. as a nullary operator that returns 0..-1//1
  • [Kernel] Implement Unicode Technical Standard #39 recommendations. In particular, we warn for confusable scripts and restrict identifiers to single-scripts or highly restrictive mixed-scripts
  • [Kernel] Add binary_slice/2 and binary_slice/3
  • [Keyword] Add Keyword.from_keys/2 and Keyword.replace_lazy/3
  • [List] Add List.keysort/3 with support for a sorter function
  • [Macro] Add Macro.classify_atom/1 and Macro.inspect_atom/2
  • [Macro.Env] Add Macro.Env.prune_compile_info/1
  • [Map] Add Map.from_keys/2 and Map.replace_lazy/3
  • [MapSet] Add MapSet.filter/2 and MapSet.reject/2
  • [Node] Add Node.spawn_monitor/2 and Node.spawn_monitor/4
  • [PartitionSupervisor] Add PartitionSupervisor that starts multiple isolated partitions of the same child for scalability
  • [Path] Add Path.safe_relative/1 and Path.safe_relative_to/2
  • [Registry] Add Registry.count_select/2
  • [Stream] Add Stream.duplicate/2 and Stream.transform/5
  • [String] Support empty lookup lists in String.replace/3, String.split/3, and String.splitter/3
  • [String] Allow slicing with steps in String.slice/2
  • [Task] Add :zip_input_on_exit option to Task.async_stream/3
  • [URI] Add URI.append_query/2
  • [Version] Add Version.to_string/1
  • [Version] Colorize Version.Requirement source in Inspect protocol

IEx

  • [IEx.Helpers] Allow an atom to be given to pid/1

Mix

  • [mix do] Support --app option to restrict recursive tasks in umbrella projects
  • [mix new] Do not allow projects to be created with application names that conflict with multi-arg Erlang VM switches
  • [mix test] Improve error message when suite fails due to coverage
  • [mix profile] Return the return value of the profiled function

2. Bug fixes

Elixir

  • [CLI] Improve errors on incorrect --rpc-eval usage
  • [Code] Do not emit warnings when formatting code
  • [Kernel] Do not allow restricted restricted characters in identifiers according to UTS39
  • [Kernel] Define __exception__ field as true when expanding exceptions in typespecs

ExUnit

  • [ExUnit] Do not raise when diffing unknown bindings in guards
  • [ExUnit] Properly print diffs when comparing improper lists with strings at the tail position

Mix

  • [mix compile.elixir] Fix --warnings-as-errors when used with --all-warnings
  • [mix release] Only set RELEASE_MODE after env.{sh,bat} are executed

IEx

  • [IEx] Disallow short-hand pipe after matches

3. Soft-deprecations (no warnings emitted)

EEx

  • [EEx] Using <%# ... %> for comments is deprecated. Please use <% # ... %> or the new multi-line comments with <%!-- ... --%>

Mix

  • [mix cmd] The --app option in mix cmd CMD is deprecated in favor of the more efficient mix do --app app cmd CMD

4. Hard-deprecations

Elixir

  • [Application] Calling Application.get_env/3 and friends in the module body is now discouraged, use Application.compile_env/3 instead
  • [Bitwise] use Bitwise is deprecated, use import Bitwise instead
  • [Bitwise] ~~~ is deprecated in favor of bnot for clarity
  • [Kernel.ParallelCompiler] Returning a list or two-element tuple from :each_cycle is deprecated, return a {:compile | :runtime, modules, warnings} tuple instead
  • [Kernel] Deprecate the operator <|> to avoid ambiguity with upcoming extended numerical operators
  • [String] Deprecate passing a binary compiled pattern to String.starts_with?/2

Logger

  • [Logger] Deprecate $levelpad on message formatting

Mix

  • [Mix] Mix.Tasks.Xref.calls/1 is deprecated in favor of compilation tracers

5. Backwards incompatible changes

Mix

  • [mix local.rebar] Remove support for rebar2, which has not been updated in 5 years, and is no longer supported on recent Erlang/OTP versions

v1.13

The CHANGELOG for v1.13 releases can be found in the v1.13 branch.