elixir-lang/elixir v1.12.0

on GitHub

Announcement: https://elixir-lang.org/blog/2021/05/19/elixir-v1-12-0-released/

1. Enhancements

EEx

• [EEx.Engine] Add c:EEx.Engine.handle_text/3 callback that receives text metadata
• [EEx.Engine] Emit warnings for unused "do" expression in EEx

Elixir

• [Code] Add Code.cursor_context/2 to return the context of a code snippet
• [Code] Do not add newlines around interpolation on code formatting. Note this means formatted code that has interpolation after the line length on Elixir v1.12 won't be considered as formatted on earlier Elixir versions
• [Code] Do not add brackets when keywords is used in the access syntax
• [Calendar] Support basic datetime format in Calendar.ISO parsing functions
• [Code] Improve evaluation performance on systems running on Erlang/OTP 24+
• [Date] Support steps via Date.range/3
• [DateTime] Add offset to DateTime.to_iso8601/2 (now to_iso8601/3)
• [Enum] Add Enum.count_until/2 and Enum.count_until/3
• [Enum] Add Enum.product/1
• [Enum] Add Enum.zip_with/2, Enum.zip_with/3, Enum.zip_reduce/3, and Enum.zip_reduce/4
• [Enum] Add support for functions as the second argument of Enum.with_index/2
• [Exception] Show error_info data for exceptions coming from Erlang
• [Float] Add Float.pow/2
• [Integer] Add Integer.pow/2 and Integer.extended_gcd/2
• [IO] Add IO.stream/0 and IO.binstream/0 which default to STDIO with line orientation
• [List] Add default value for List.first/1 and List.last/1
• [Kernel] Add first..last//step as support for stepped ranges
• [Kernel] Also warn for literal structs on min/2 and max/2
• [Kernel] Add Kernel.tap/2 and Kernel.then/2
• [Kernel] Do not add runtime dependencies to remotes in typespecs
• [Kernel] When there is an unused variable warning and there is a variable with the same name previously defined, suggest the user may have wanted to use the pin operator
• [Kernel] Improve error messages on invalid character right after a number
• [Kernel] Show removal and deprecated tips from Erlang/OTP
• [Macro] Add export dependencies on Macro.struct!/2
• [Macro] Support :newline to customize newlines escaping in Macro.unescape_string/2
• [Module] Raise on invalid @dialyzer attributes
• [Module] Add Module.get_definition/2 and Module.delete_definition/2
• [Module] Allow @on_load to be a private function
• [Module] Validate @dialyzer related module attributes
• [Module] Add Module.reserved_attributes/0 to list all reserved attributes by the language
• [Range] Add Range.new/3 and Range.size/1
• [Regex] Add offset option to Regex.scan/3 and Regex.run/3
• [Registry] Support :compression on Registry tables
• [Registry] Support Registry.values/3 for reading values under a given key-pid pair
• [Stream] Add Stream.zip_with/2 and Stream.zip_with/3
• [String] Add :turkic mode option to String case functions
• [String] Update to Unicode 13.0
• [System] Add System.trap_signal/3 and System.untrap_signal/2
• [System] Add System.shell/2 to invoke a command that is interpreted by the shell
• [Tuple] Add Tuple.sum/1 and Tuple.product/1
• [URI] Support RFC3986 compliant encoding and decoding of queries via the :rfc3986 option

ExUnit

• [ExUnit] Intercept SIGQUIT (via Ctrl+\) and show a list of all aborted tests as well as intermediate test results
• [ExUnit] Interpolate module attributes in match assertions diffs
• [ExUnit] Print how much time is spent on async vs sync tests
• [ExUnit] Improve error messages for doctests
• [ExUnit] Compile doctests faster (often by two times)
• [ExUnit] Add ExUnit.async_run/0 and ExUnit.await_run/1

IEx

• [IEx] Make IEx' parser configurable to allow special commands
• [IEx] Show function signature when pressing tab after the opening parens of a function
• [IEx] If an IEx expression starts with a binary operator, such as |>, automatically pipe in the result of the last expression

Mix

• [Mix] Add Mix.install/2 for dynamically installing a list of dependencies
• [Mix] Support :exit_code option in Mix.raise/2
• [Mix] Discard MIX_ENV and MIX_TARGET values if they are empty strings
• [Mix] Print the time taken to execute a task with on MIX_DEBUG=1
• [mix compile.erlang] Compile multiple files in parallel
• [mix escript.build] Deep merge configuration and ensure argv is set when executing config/runtime.exs
• [mix release] Add RELEASE_PROG to releases with the name of the executable starting the release
• [mix release] Support remote.vm.args to customize how the connecting VM boots
• [mix test] Run all available tests if there are no pending --failed tests. This provides a better workflow as you no longer need to toggle the --failed flag between runs

2. Bug fixes

Elixir

• [CLI] Ensure -e "" (with an empty string) parses correctly on Windows
• [Inspect] Do not override user supplied :limit option for derived implementations
• [Kernel] Allow heredoc inside a heredoc interpolation
• [Kernel] Preserve CRLF on heredocs
• [Kernel] Public functions without documentation now appear as an empty map on Code.fetch_docs/1, unless they start with underscore, where they remain as :none. This aligns Elixir's implementation with EEP48
• [Kernel] Do not crash when complex literals (binaries and maps) are used in guards
• [Kernel] Properly parse keywords (such as end) followed by the :: operator
• [Kernel] Do not ignore unimplemented signatures from generated functions
• [Kernel] Improve error message when an expression follows a keyword list without brackets
• [Macro] Macro.decompose_call/1 now also consider tuples with more than 2 elements to not be valid calls
• [Macro] Fix Macro.to_string/1 double-escaping of escape characters in sigils
• [Macro] Fix Macro.underscore/1 on digits preceded by capitals: "FOO10" now becomes "foo10" instead of "fo_o10"
• [Macro] Preserve underscores between digits on Macro.underscore/1
• [OptionParser] Properly parse when numbers follow-up aliases, for example, -ab3 is now parsed as -a -b 3
• [Path] Fix Path.relative_to/2 when referencing self
• [Path] Do not crash when a volume is given to Path.absname/1, such as "c:"
• [Task] Ensure Task.async_stream/2 with ordered: false discard results as they are emitted, instead of needlessly accumulating inside the stream manager
• [Task] Raise if :max_concurrency is set to 0 on streaming operations
• [URI] Do not discard empty paths on URI.merge/2

ExUnit

• [ExUnit.Case] Make @tag tmp_dir an absolute directory, avoiding inconsistencies if the test changes the current working directory
• [ExUnit.Diff] Fix cases where the diffing algorithm would fail to print a pattern correct

IEx

• [IEx] Fix auto-completion inside remote shells

Mix

• [mix app.config] Do not emit false positive warnings when configured dependencies that have runtime: false set
• [mix compile.elixir] Ensure that a manifest is generated even with no source code
• [mix compile.elixir] Make sure export dependencies trigger recompilation when the dependency is removed as well as when the whole file is removed
• [mix compile.elixir] Do not emit false positive warnings when a path dependency adds a module that is then used by the current application in the same mix compile cycle
• [mix test] Ensure protocols within the current project are consolidated when --cover is given
• [mix release] Improve compliance of release scripts with stripped down Linux installations
• [mix release] Preserve file mode when copying non-beam ebin files
• [mix xref] Ensure args are passed to the underlying mix compile call

3. Soft-deprecations (no warnings emitted)

Elixir

• [Kernel] Using first..last to match on ranges is soft-deprecated and will warn on future Elixir versions. Use first..last//step instead
• [Kernel] Using first..last to create decreasing ranges is soft-deprecated and will warn on future versions. Use first..last//-1 instead

4. Hard-deprecations

EEx

• [EEx.Engine] use EEx.Engine is deprecated in favor of explicit delegation

Elixir

• [Kernel] The binary operator ^^^ is deprecated. If you are using Bitwise.^^^/2, use Bitwise.bxor/2 instead
• [Kernel] Deprecate @foo() in favor of @foo
• [System] Deprecate System.stacktrace/0 (it was already deprecated outside of catch/rescue and now it is deprecated everywhere)

Mix

• [mix compile] The :xref compiler is deprecated and it has no effect. Please remove it from your mix.exs file.

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