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CHANGELOG.md

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Changelog for Elixir v1.3

v1.3.0-dev

1. Enhancements

EEx

  • [EEx.Engine] Support an init/1 function in engines that will return the initial buffer (defaults to an empty string)

Elixir

  • [Calendar] Add Calendar and Date, Time, NaiveDateTime and DateTime types
  • [CLI] Add --logger-otp-reports BOOL and --logger-sasl-reports BOOL switches
  • [Compiler] Emit a summary of compilation errors when modules are missing
  • [Exception] Suggest possible functions on UndefinedFunctionError for existing modules
  • [File] Support IO devices in File.copy/3
  • [Inspect] Support :base option when inspecting binaries
  • [Kernel] Support generated: true in quote
  • [Kernel] Support Kernel.pop_in/1 and Kernel.pop_in/2 for yanking a value from a nested data structure
  • [Kernel] Allow variable struct names when matching, for example, %module{key: "value"} = struct
  • [Kernel] Allow guards on the left side of <- in for and with special forms
  • [Kernel] Support else chunks in with
  • [Kernel] Track {module, function, arity} imports and warn on unused ones when such are specified in :only
  • [Process] Add Process.sleep/1
  • [Regex] Support :include_captures in Regex.split/3
  • [Unicode] Update Unicode to 8.0.0

ExUnit

  • [ExUnit] Show pinned variables on failed assert ^left = right and assert match?(^left, right) assertions
  • [ExUnit] Add ExUnit.Case.register_attribute which allow attributes to be cleaned up whenever a test is defined

IEx

  • [IEx] Add nl/2 that loads a given modules on a list of nodes
  • [IEx.Autocomplete] Improve IEx expand to handle functions after &

Logger

  • [Logger] Introduce Logger.reset_metadata/0,1

Mix

  • [Mix] Add mix app.tree and mix deps.tree
  • [Mix] Add Mix.Task.rerun/2 that reenables and re-runs a task
  • [Mix] Support @preferred_cli_env attribute when defining tasks
  • [Mix] Support mix test --raise that will raise when a test suite fails (instead of setting the exit code to 1)
  • [Mix] Enable rebar3 manager by default
  • [Mix] Add mix escript.install to install escripts
  • [Mix] Print stacktraces for Mix.Error when MIX_DEBUG=1 is set

2. Bug fixes

Elixir

  • [Application] Ensure Application.spec/2 returns nil for unknown applications
  • [GenServer] Ensures cast/2 returns :ok if locally registered process is not found
  • [Inspect] Ensure binaries break into new lines when inspected
  • [Kernel] Do not choke on capture operator with argument above &191
  • [Kernel] Raise if defstruct is called multiple times
  • [Kernel] Ensure Module.create/3 respects var/alias hygiene
  • [Macro] Fix Macro.to_string/1 on a call of a capture argument, for example &(&1).(:x)
  • [String] Ensure strip also removes non-breaking whitespaces (and ensure split still does not split on them)

Mix

  • [Mix] Improve task not found message when Mix would include the not found task as a suggestion due to different casing
  • [Mix] Ignore lock revision when the lock is out of date when updating Mix dependencies

3. Soft deprecations (no warnings emitted)

4. Deprecations

This release deprecates many APIs that have been soft-deprecated in previous Elixir versions.

Elixir

  • [Dict] Dict is no longer a behaviour and its functions will be deprecated in upcoming releases
  • [Enum] Passing a non-map to Enum.group_by/3 is deprecated
  • [Kernel] \x{H*} in strings/sigils/char lists is deprecated
  • [Kernel] Add deprecation for defdelegate list arguments and :append_first option
  • [Kernel] Warn if a variable is assigned inside case/if/etc and used outside the block
  • [Keyword] Keyword.size/1 is deprecated in favor of Kernel.length/1
  • [Map] Map.size/1 is deprecated in favor of Kernel.map_size/1
  • [Regex] The option /r (for ungreedy) has been deprecated in favor of /U
  • [Set] Set is no longer a behaviour and its functions will be deprecated in upcoming releases
  • [String] String.valid_character?/1 is deprecated in favor of String.valid?/1 with pattern matching
  • [Task] Task.find/2 is deprecated in favor of explicit message matching
  • [URI] Passing a non-map to URI.decode_query/3 is deprecated