v1.1.0
Official announcement: https://elixir-lang.org/blog/2015/09/28/elixir-v1-1-0-released/
1. Enhancements
Elixir
- [Application] Add
Application.fetch_env!/2
,Application.loaded_applications/0
andApplication.started_applications/0
- [CLI] Add support for
--werl
in Windows bash-like shells - [Dict] Add
Dict.get_and_update/3
which behaves similar to the now deprecated Access protocol - [Dict] Add
Dict.get_lazy/3
,Dict.pop_lazy/3
andDict.put_new_lazy/3
- [Enum] Add
Enum.random/1
,Enum.take_random/2
,Enum.min_max/1
,Enum.min_max_by/2
,Enum.reverse_slice/3
,Enum.reduce_while/3
,Enum.dedup/1
andEnum.dedup_by/2
- [Enum] Inline common map usage in
Enum
functions for performance - [File] Add
File.lstat/1
andFile.lstat/1
that works likeFile.stat/1
but is able to return symlink information (i.e. it does not traverse symlinks) - [File] Add
File.rename/2
- [Integer] Add
Integer.digits/2
andInteger.undigits/2
- [Inspect] Add the
:safe
option toinspect/2
and make it safe by default, meaning failures while inspecting won't trigger other failures. Instead, it will be wrapped in an exception which is properly formatted - [IO] Support fenced code blocks on
IO.ANSI.Docs
- [GenServer] Add
GenServer.whereis/1
that expandsGenServer
dispatches into a proper pid - [Kernel] No longer include
:crypto
and:syntax_tools
as dependencies. The former is only needed if you have encrypted debug info (therefore you can add:crypto
as a dependency manually) and the latter is no longer used - [Kernel] Raise when
var.Alias
syntax is used and it does not expand to an atom at compile time (previously it emitted warnings) - [Kernel] Improve generation of argument names for function signatures
- [Kernel]
::/2
is now a special form - [Kernel] Warn when a variable with underscore is used
- [Kernel] Allow underscores in binary, octal and hex literals
- [Kernel] Warn when module attributes, variables, strings and numbers are used in code but the expression has no effect
- [Kernel] Support
\uXXXX
and\u{X*}
in strings and char lists to map to Unicode codepoints - [List] Add
List.keytake/3
- [Module] Improve name inference for function signatures in documentation metadata
- [Process] Add
Process.hibernate/3
- [Process] Allow a list of specs in
Process.info/2
- [Set] Introduce
MapSet
data type. This new data type uses maps behind the scenes and is useful for storing a dozens of items in Erlang 17. In future versions when maps efficiently support large collections, it is meant to be the main Set abstraction in Elixir - [Stream] Add
Stream.dedup/1
,Stream.dedup_by/2
andStream.transform/4
- [String] Support calculation of the jaro distance between strings (usually names) via
String.jaro_distance/2
. This is used by Mix to support "Did you mean?" feature when a task does not exist - [String] Add
String.splitter/3
that splits strings as a stream - [StringIO]
StringIO.flush/1
was added to flush the output of a StringIO device - [Task] Introduce
Task.yield/2
andTask.shutdown/2
to check if a task is still executing and shutdown otherwise - [Tuple] Add
Tuple.append/2
- [URI] Default ports were added for "ws" and "wss" schemas
- [URI] Add
URI.to_string/1
EEx
- [EEx] Add
:trim
option to EEx that automatically trims the left side of<%
and right side%>
if only spaces and new lines preceed/follow them
ExUnit
- [ExUnit] Add number of skipped tests to
ExUnit
output - [ExUnit] Make timeout configurable for the whole test suite via the
:timeout
configuration - [ExUnit] Allow moduledoc to be filtered/skipped in doctests
- [ExUnit] Provide built-in log capturing functionality
- [ExUnit] Allow
assert_receive_timeout
andrefute_receive_timeout
to be configured in the ExUnit application - [ExUnit] Allow tests to be skipped with
@tag :skip
or@tag skip: "reason"
- [ExUnit] Add tests without implementation (missing the do block) which automatically fail. Such tests are also automatically tagged as
:not_implemented
, allowing them to be skipped - [ExUnit] Increase by default stacktrace depth to 20 (this value is also configurable)
- [ExUnit] Improve formatting on
assert_raise
errors for message mismatch - [ExUnit] Improve formatting on
assert_receive
when using pinned variables
IEx
- [IEx] Support
IEx.pry
with--remsh
for remote debugging - [IEx] Add
b/1
helper that shows documentation for behaviour modules and its callback functions - [IEx] Provide tab completion for aliases and allow aliases like
Foo.Bar.Baz
to autocomplete even ifFoo.Bar
is not defined - [IEx] Provide a
pid/3
helper for buildings pids from numbers
Logger
- [Logger] Support printing pids and refs in Logger metadata
- [Logger] Allow Logger metadata to be removed from pdict by setting it to
nil
- [Logger] Add application configuration
translator_inspect_opts
for logger to customize how state and message are formatted when translating OTP errors and reports - [Logger] Automatically include the current application in metadata when compiled via Mix
Mix
- [Mix] Check Elixir version right after archive installation and provide feedback if there is a mismatch
- [Mix] Allow rebar dependencies with
mix.exs
to be compiled with Mix - [Mix] Allow rebar dependencies to be specified via
:path
- [Mix] Also consider subdirectories in
config
directory forMix.Project.config_files/0
- [Mix] Allow dynamic configuration in Mix projects by storing config in an agent
- [Mix] Support rebar3 style Git refs in
rebar.config
files - [Mix] Only recompile compile time dependencies in mix projects. This should considerably speed up recompilation times in Elixir projects
- [Mix] Warn when configuring an application that is not available
- [Mix] Add
mix profile.fprof
for easy code profiling - [Mix] Abort when dependencies have conflicting
:only
definitions - [Mix] Fully recompile projects if Elixir or SCM changes
- [Mix] Allow checksum to be checked on archive install via
--sha512
option - [Mix] Add
mix local.public_keys
to safely manage installation of Hex and Rebar dependencies
2. Bug fixes
Elixir
- [CLI] Ensure Logger messages are flushed when executing commands
- [Code]
:delegate_locals_to
failed to delegate to the chosen module in many situations and messed up stacktraces. This option has therefore been replaced by imports - [Code] Store the documentation line in the metadata returned by
Code.get_docs/2
- [Exception] Do not fail when calculating an exception message, even if the message is invalid
- [File] Ensure
File.touch/2
andFile.stat/2
receive and return universal times. Previously they would work with local times which are not monotonically increasing, which could present issues on scripts. If the times are being shown to the user,time: :local
can be given as argument - [Float] Support complete scientific notation in
Float.parse/1
- [Kernel] Do not expand
in/2
argument in module body - [Kernel] Throw syntax error for undefind atom/alias syntax
:foo.Bar
- [Kernel] Improve error message when we can't compile because the target directory is not writeable
- [Kernel] Allow capture of non-symbolic operators like
&and/2
,¬/1
and others - [Kernel] Raise if heredoc terminal is accidentally found in the middle of a line without escaping
- [Kernel] Don't warn on missing imports if nothing was imported
- [Kernel] Raise if arity bigger than 255 is given to capture operator
- [Macro] Properly convert captures in
Macro.to_string/1
- [Module] Do not accept non-Elixir module names in
Module.split/1
- [Protocol] Guarantee that derived protocols go through
Any
instead ofMap
- [Range] Restrict ranges to integers to fix diverse bugs of values being included in the range when they should not (false positives)
- [Regex] Fix splitting of empty strings with regexes when trim is set to
true
. Now bothString.split/3
andRegex.split/3
return an empty list when called with an empty string and trim is enabled - [Regex] Fix
Regex.replace/4
so it doesn't discard escape characters - [Stream] Ensure suspending
Stream.flat_map/2
andStream.transform/3
does not consume unecessary items from the given enumerable
EEx
- [EEx] Allow EEx interpolation to also apply inside quotations
<%%= ... %>
ExUnit
- [ExUnit] Skipped tests now correctly count towards the total of tests in the result returned by
ExUnit.run/0
- [ExUnit] Fix a bug where failures when inspecting data structure or retrieving error messages could bring the whole ExUnit runner down
- [ExUnit] Do not change the semantics of evaluated code with
assert
/refute
. For example, from now on,assert nil = some_expr()
will now raise as expected, as the expression still evaluates to a falsy value - [ExUnit] Report proper line number for doctest failures
Logger
- [Logger] Include metadata in
Logger.log/3
, useLogger.bare_log/3
for runtime-only, with no metadata behaviour
Mix
- [Mix] Use the safer
https
protocol instead ofgit
for:github
dependencies - [Mix] Ensure automatic protocol consolidation via
:consolidate_protocols
is triggered in umbrella apps - [Mix] Do not raise if wildcard given to
import_config
does not match any file - [Mix] Applications with
:build_embedded
set to true require explicit compilation step - [Mix] Also remove consolidated protocols on
mix clean
- [Mix] Ensure
--exclude
inmix test
concatenates with test helper excludes
3. Soft deprecations (no warnings emitted)
Elixir
- [Behaviour] The module
Behaviour
is deprecated. Instead ofdefcallback
, one can simply use@callback
. Instead ofdefmacrocallback
, one can simply use@macrocallback
- [Enum]
Enum.uniq/2
is deprecated in favor ofEnum.uniq_by/2
- [Kernel]
\x
inside strings and charlists is deprecated in favor of\uXXXX
and\u{X*}
. The values emitted by\x
are unfortunately wrong (they should be bytes but currently it emits codepoints).\u
is meant to correctly map to codepoints and\x
will be fixed in the future to map to bytes - [Regex] Ungreedy option
r
is deprecated in favor ofU
(which is standard in regular expressions in other languages)
4. Deprecations
Elixir
- [Access] Implementing the Access protocol is deprecated. The Access protocol relies on the code server in development and test mode (when protocol consolidation is not applied) and it generated a bottleneck when working with multiple processes and the Access protocol was invoked hundreds of times (which is not uncommon). Note the
Access
module and theopts[key]
syntax are not affected and they are not deprecated, only the underlying protocol dispatch - [Kernel]
?\xHEX
is deprecated in favor of0xHEX
. There is no situation where the former should be used in favor of the latter and the latter is always cleaner - [Kernel] Giving
as: true | false
toalias/2
andrequire/2
have been deprecated (it was undocumented behaviour) - [String] Passing an empty string to
starts_with?
,contains?
andends_with?
had dubious behaviour and have been deprecated to help developers identify possible bugs in their source code