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CHANGELOG.md

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Changelog for Elixir v1.6

Compiler diagnostics

TODO.

Code formatter

TODO.

Stream data and property testing

TODO.

v1.6.0-dev

1. Enhancements

EEx

  • [EEx] Allow markers / and | to be used in a custom EEx engine

Elixir

  • [Code] Add format_string!/2 and format_file!/2 for automatic code formatting
  • [Inspect.Algebra] Add :strict and :flex breaks
  • [Inspect.Algebra] Allow a group to inherit the parent group break
  • [Inspect.Algebra] Add force_break/1 and next_break_fits/2 which give more control over document fitting
  • [Inspect.Algebra] Add collapse_lines/1 for collapsing multiple lines to a maximum value
  • [Inspect.Algebra] Allow nest/2 to be :reset or be set to the current :cursor position
  • [Kernel] Prefix variables with V when emitting Erlang code. This improves the integration with tools such as Erlang code formatters and the GUI debugger
  • [Kernel] Warn on the use of length(x) == 0 in guards
  • [Kernel] Warn if catch comes before rescue in try
  • [Kernel.ParallelCompiler] Add compile/2, compile_to_path/3 and require/2 which provide detailed information about warnings and errors
  • [Stream] Add Stream.intersperse/2
  • [String] Update to Unicode 10
  • [String] Allow passing empty string match to String.replace/4
  • [Task] Allow a custom supervisor to be given to Task.Supervisor.async_stream/3
  • [Time] Add Time.add/3

ExUnit

  • [ExUnit.Callbacks] Add ExUnit.Callbacks.start_supervised!/2
  • [ExUnit.Case] Generate a random seed per test based on the test suite seed

Mix

  • [mix archive.build] Allow mix archive.build to bundle dot files via an option
  • [mix compile] Define a behavior for Mix compiler tasks and return diagnostics from compiler tasks
  • [mix deps] Support :system_env option when specifying dependencies
  • [mix format] Add a mix format task that formats the given files (or the files specified in a .formatter.exs file)
  • [mix profile.eprof] Add a new task for time-based profiling with eprof
  • [mix test] Run all functions in a describe block by giving the file:line the describe block starts
  • [mix test] Report the top N slowest tests with the --slowest N flag

2. Bug fixes

Elixir

  • [CLI] Support path with spaces as argument to elixir.bat
  • [Kernel] Solve a precedence issue between & and |, such as [&Foo.bar/1 | &Baz.bat/2]
  • [Kernel] Do not load dynamic Elixir modules as :in_memory as this value is not officially supported by the code server. Instead, use an empty list, which is the same value used by Erlang.
  • [Kernel] Validate variable struct name is atom when used in pattern matching
  • [Macro] Fix Macro.to_string/2 for tuple calls, such as alias Foo.{Bar, Baz}
  • [MapSet] Return valid MapSet when unioning a legacy MapSet
  • [URI] Preserve empty fragments in URI.parse/1

Mix

  • [mix deps] Ensure optional dependencies in umbrella applications are loaded
  • [mix xref] Take compile dependencies with higher priority that runtime ones when building a graph

3. Soft deprecations (no warnings emitted)

Elixir

  • [Inspect.Algebra] surround/3 and surround_many/6 are deprecated in favor of container_doc/6
  • [Kernel.ParallelCompiler] files/2 and files_to_path/3 are deprecated in favor of compile/2 and compile_to_path/3
  • [Kernel.ParallelRequire] files/2 is deprecated in favor of Kernel.ParallelCompiler.require/2

ExUnit

  • [ExUnit.Formatter] :case_started and :case_finished events are deprecated in favor of :module_started and :module_finished

4. Deprecations

Elixir

  • [Enum] Enum.partition/2 is deprecated in favor of Enum.split_with/2
  • [Keyword] Keyword.replace/3 is deprecated in favor of Keyword.fetch/2 and Keyword.put/3
  • [Map] Map.replace/3 is deprecated in favor of Map.fetch/2 and Map.put/3
  • [Range] Deprecate Range.range?/1 in favor of pattern matching on _ .. _

v1.5

The CHANGELOG for v1.5 releases can be found in the v1.5 branch.