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Changelog for Elixir v1.5

v1.5.0-dev

1. Enhancements

Elixir

  • [Access] Optimize Access.get/2
  • [Calendar] Limit Calendar.ISO up to year 10000
  • [Calendar] Add Rata Die format for conversions between Calendars and Date.convert/2, Time.convert/2, NaiveDateTime.convert/2 and DateTime.convert/2 (as well as bang variants)
  • [Calendar] Add :calendar field to Time struct
  • [Calendar] Add Date.diff/2
  • [Enum] Add Enum.chunk_by/4 and Stream.chunk_by/4
  • [Exception] Add Exception.blame/3 that adds metadata to exceptions
  • [File] Add File.read_link/1 and File.read_link!/1
  • [File] Introduce :trim_bom option for File.stream!/2
  • [Inspect] Add :printable_limit to control the limit of printable structures
  • [Integer] Add Integer.gcd/2
  • [Kernel] Use the new debug_info chunk in OTP 20. This provides a mechanism for tools to retrieve the Elixir AST from beam files
  • [Kernel] defoverridable/1 accepts a module name as argument and marks all callbacks as overridable
  • [Kernel] Allow non-quoted Unicode atoms and variables according to Unicode Annex #31 (see Unicode Syntax document)
  • [Kernel] Warn when a :struct key is used when building/updating structs
  • [Keyword] Add replace/3 and replace!/3 for replacing an existing key
  • [List] List.starts_with?/2
  • [Macro] Introduce Macro.generate_arguments/2
  • [Map] Optimize Map.merge/3 by choosing merge direction
  • [Map] Add replace/3 and replace!/3 for replacing an existing key
  • [MapSet] Reduce MapSet size when serialized to approximately half
  • [Process] Add Process.cancel_timer/2
  • [Registry] Support ETS guard conditions in Registry.match/3
  • [Task] Support :on_timeout in Task.async_stream to control how tasks are terminated

ExUnit

  • [ExUnit] Show code snippet from test source file in case of test errors
  • [ExUnit] Show the value of variables used in an assertion
  • [ExUnit] Use Exception.blame/3 when formatting test errors

IEx

  • [IEx.Evaluator] Use Exception.blame/3 when showing errors in the terminal
  • [IEx.Helpers] Add e/1 IEx helper to list all exports in a module
  • [IEx.Info] Implement IEx.Info protocol for calendar types

Logger

  • [Logger] Add metadata: :all configuration to log all metadata

Mix

  • [mix escript.build] Strip debug information from escripts by default and add option :strip_beam which defaults to true
  • [mix loadpaths] Ensure --no-deps-check do not trigger SCM callbacks (such as git)
  • [mix local.hex] Add --if-missing flag to local.hex mix task
  • [mix profile.cprof] Add Mix.Tasks.Profile.Cprof for count-based profiling

2. Bug fixes

Elixir

  • [File] Support :ram/:raw files in File.copy/2
  • [Kernel] Support guards on anonymous functions of zero arity
  • [Kernel] Fix compilation of maps used as maps keys inside matches
  • [Record] Properly escape quoted expressions passed to defrecord
  • [String] Consider Unicode non-characters valid according to the specification in String.valid?/1

ExUnit

  • [ExUnit] Properly account failed tests when setup_all fails

IEx

  • [IEx] Skip autocompletion of module names that are invalid without being quoted
  • [IEx] Do not start oldshell alongside IEx

Mix

  • [mix compile.elixir] Store multiple sources in case of module conflicts. This solves an issue where _build would get corrupted when compiling Elixir projects with module conflicts

3. Soft deprecations (no warnings emitted)

Elixir

  • [Kernel] not left in right is soft-deprecated in favor of left not in right

4. Deprecations

Elixir

  • Atom.to_char_list/1, Float.to_char_list/1, Integer.to_char_list/1, Integer.to_char_list/2, Kernel.to_char_list/1, List.Chars.to_char_list/1, String.to_char_list/1 have been deprecated in favor of their to_charlist version. This aligns with the naming conventions in both Erlang and Elixir
  • [Calendar] Deprecate NaiveDateTime and DateTime in Date.to_iso8601/1, Date.to_erl/1, Time.to_iso8601/1 and Time.to_erl/1 to avoid loss of precision
  • [Enum] Deprecate Enum.filter_map/3 in favor of Enum.filter/2 + Enum.map/2 or for-comprehensions
  • [GenEvent] Deprecate GenEvent and provide alternatives in its docs
  • [Kernel] Using () to mean nil is deprecated
  • [Kernel] :as_char_lists value in Inspect.Opts.t/0 type, in favor of :as_charlists
  • [Kernel] :char_lists key in Inspect.Opts.t/0 type, in favor of :charlists
  • [Module] Using Erlang parse transforms via @compile {:parse_transform, _} is deprecated
  • [Stream] Deprecate Stream.filter_map/3 in favor of Stream.filter/2 + Stream.map/2
  • [String] String.ljust/3 and String.rjust/3 are deprecated in favor of String.pad_leading/3 and String.pad_trailing/3 with a binary padding
  • [String] String.strip/1 and String.strip/2 are deprecated in favor of String.trim/1 and String.trim/2
  • [String] String.lstrip/1 and String.rstrip/1 are deprecated in favor of String.trim_leading/1 and String.trim_trailing/1
  • [String] String.lstrip/2 and String.rstrip/2 are deprecated in favor of String.trim_leading/2 and String.trim_trailing/2 with a binary as second argument
  • [Typespec] char_list/0 type is deprecated in favor of charlist/0

v1.4

The CHANGELOG for v1.4 releases can be found in the v1.4 branch.