iex autocomplete for variables

[andrei sura]

I am new to elixir and still learning about using iex.
For python there is this nice package called bpython which recognizes the type of a variable and can suggest functions from the class.

Example:

iex> Map. +TAB ==> list of functions available in the map class
iex> x = Map.new
iex> x. + TAB ==> nothing happens ( I expected list of functions available in the map class)

[andrei sura]

I just realized that this should be probably posted on the Elixir forum instead.

[José Valim]

Elixir is not an object-oriented language. You can't really do something like:

x = "foo"

x.casefold

José Valim

www.plataformatec.com.br

Founder and 

Director of R&D

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[OvermindDL1]

Hmm, although iex autocompleting something like that when it is a map, keyword list, or an atom/tuple would be quite nice and entirely doable.  PR's welcome I'm sure.  ^.^;

On Wednesday, October 4, 2017 at 4:10:58 AM UTC-6, José Valim wrote:

Elixir is not an object-oriented language. You can't really do something like:

x = "foo"

x.casefold

José Valim

www.plataformatec.com.br

Founder and 

Director of R&D

On Wed, Oct 4, 2017 at 11:57 AM, andrei sura <sura....@gmail.com> wrote:

I am new to elixir and still learning about using iex.
For python there is this nice package called bpython which recognizes the type of a variable and can suggest functions from the class.

Example:

iex> Map. +TAB ==> list of functions available in the map class
iex> x = Map.new
iex> x. + TAB ==> nothing happens ( I expected list of functions available in the map class)

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[José Valim]

We already do for maps:

iex(1)> map = %{foo: 1}

%{foo: 1}

iex(2)> map.

and atoms:

iex(1)> map = Map

Map

iex(2)> map.

José Valim

www.plataformatec.com.br

Founder and 

Director of R&D

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[OvermindDL1]

Heh, I tried it on my 1.5.1 install but those did not work, however they do work in my 1.6.0-dev install, whoo!

Added recently I'm guessing?

[José Valim]

I am almost sure they were added on v1.5. It is even in the CHANGELOG: https://github.com/elixir-lang/elixir/blob/v1.5/CHANGELOG.md

José Valim

www.plataformatec.com.br

Founder and 

Director of R&D

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[OvermindDL1]

Hmm, well I have a 1.5.2 here and:

$ iex

Interactive Elixir (1.5.2) - press Ctrl+C to exit (type h() ENTER for help)

iex> s = String

String

iex> s.

And I hit <Tab> there (repeatedly) and nothing pops up.

iex> String.

And <Tab> repeatedly and nothing pops up either..

Oh, I think this might be a Windows thing.  I have 1.5.2 installed on my Windows side (OTP 20), and I have 1.6.0-dev installed (OTP 21) on my linux side (I'm at work, 2 systems side by side).  I cannot seem to get `<Tab>` to ever popup anything in `iex` on windows...  Seems iex's autocomplete is broken there?

[José Valim]

I thought autocompletion doesn't work on Windows except under --werl?

José Valim

www.plataformatec.com.br

Founder and 

Director of R&D

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[OvermindDL1]

Doesn't seem to in iex, and adding `--werl` just brings up this fruggin-ugly window that spams this crap:

退^[[G^[[34miex>^[[0m^[[0m  
^[[36m^[[1m^[[35mnil^[[0m^[[36m^[[1m^[[0m
^[[G^[[34miex>^[[0m^[[0m test
^[[31m** (CompileError) iex:2: undefined function test/0^[[0m
^[[31m
^[[0m^[[G^[[34miex>^[[0m^[[0m :test
^[[36m^[[1m^[[36m:test^[[0m^[[36m^[[1m^[[0m
^[[G^[[34miex>^[[0m^[[0m 

It is pretty entirely unusable, as well as it is this ugly white horror when *everything* else on both the windows and linux systems is nice and dark, in addition my shortcut keys that I use in my console exceedingly often do not work in it, unable to record sessions in it, etc... etc... etc...  `werl` is and has always been pretty horrible going back the 2 decades that I've been using erlang.

As well as other things in the command prompt have autocomplete-on-tab just fine, from being able to tab-complete folders to other programming language shells autocompleting-on-tab just fine.