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CHANGELOG.md

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Changelog for Elixir v1.7

v1.7.0-dev

1. Enhancements

Elixir

  • [Calendar.ISO] Support negative dates in Calendar.ISO
  • [Calendar] Add months_in_year/1 callback
  • [Code] Add Code.compile_file/2 that compiles files without leaving footprints on the system
  • [Date] Add months_in_year/1 function
  • [DynamicSupervisor] Use the name of the DynamicSupervisor as the ID whenever possible
  • [Function] Add Function module with capture/3, info/1 and info/2 functions
  • [IO.ANSI] Add cursor movement to IO.ANSI
  • [Kernel] Introduce __STACKTRACE__ to retrieve the current stacktrace inside catch/rescue (this will be a requirement for Erlang/OTP 21+)
  • [Kernel] Raise on unsafe variables in order to allow us to better track unused variables
  • [Kernel] Warn when using length to check if a list is not empty on guards
  • [Macro] Add Macro.special_form?/2 and Macro.operator?/2 that returns true if the given name/arity is a special form or operator respectively
  • [Macro.Env] Add Macro.Env.vars/1 and Macro.Env.has_var?/2 that gives access to environment data without accessing private fields
  • [Regex] Include endianness in the regex version. This allows regexes to be recompiled when an archive is installed in a system with a different endianness
  • [Registry] Add Registry.count/1 and Registry.count_match/4
  • [System] Use ISO 8601 in System.build_info/0

ExUnit

  • [ExUnit.Assertion] Print the arguments in error reports when asserting on a function call. For example, if assert is_list(arg) fails, the argument will be shown in the report
  • [ExUnit.Formatter] Excluded tests, via the --exclude and --only flags, are now shown as "Excluded" in reports. Tests skipped via @tag :skip are now exclusively shown as "Skipped" and in yellow
  • [ExUnit.DocTest] Show colored diffs on failed doctests

IEx

  • [IEx.Helpers] Add IEx.Helpers.use_if_available/2

Logger

  • [Logger] Improve error messages on invalid inputs

Mix

  • [mix compile] Improve support for external build tools such as rebar
  • [mix local] Use ipv6 with auto fallback to ipv4 when downloading data
  • [mix profile] Allow all profiling tasks to run programatically
  • [mix test] Add --failed option that only runs previously failed tests
  • [Mix.Project] Add Mix.Project.clear_deps_cache/0

2. Bug fixes

Elixir

  • [IO.ANSI.Docs] Fix table column alignment when converting docs to ANSI escapes
  • [Kernel] Raise on unsafe variables as some of the code emitted with unsafe variables would not correctly propagate variables or would disable tail call optimization semantics

ExUnit

  • [ExUnit.Case] Raise proper error if @tag and @moduletag are used before use ExUnit.Case
  • [ExUnit.Case] Raise proper error if @describetag is used outside of describe
  • [ExUnit.DocTest] Emit proper assertion error on doctests with invalid UTF-8

3. Soft-deprecations (no warnings emitted)

  • [Code] Deprecate Code.load_file/2 in favor of Code.compile_file/2
  • [Code] Deprecate Code.loaded_files/0 in favor of Code.required_files/0
  • [Code] Deprecate Code.unload_files/1 in favor of Code.unrequire_files/1

4. Hard-deprecations

Elixir

  • [Enum] Enum.chunk/2/3/4 is deprecated in favor of Enum.chunk_every/2/3/4 - notice chunk_every does not discard incomplete chunks by default
  • [Kernel] not left in right is ambiguous and is deprecated in favor of left not in right
  • [Kernel] Warn on confusing operator sequences, such as 1+++1 meaning 1 ++ +1 or ........ meaning ... .. ...
  • [OptionParser] Deprecate dynamic option parser mode that depended on atoms to be previously loaded and therefore behaved inconsistently
  • [Stream] Stream.chunk/2/3/4 is deprecated in favor of Stream.chunk_every/2/3/4 - notice chunk_every does not discard incomplete chunks by default

v1.6

The CHANGELOG for v1.6 releases can be found in the v1.6 branch.