From: shugo@...
Date: 2015-11-06T04:16:45+00:00
Subject: [ruby-core:71370] [Ruby trunk - Feature #11537] [Open] Introduce "Safe navigation operator"

Issue #11537 has been updated by Shugo Maeda.

Status changed from Closed to Open

Yukihiro Matsumoto wrote:
> I think about this for a while, and thinking of introducing `&.` instead of `.?`, because:

It sounds nice because &. is more friendly to syntax highlighting of my favorite editor,
but le me play devil's advocate here.

> * `.?` is similar to `?.` in Swift and other languages, but is different anyway.

This also applies to `->`, but `->` is accepted now, so it's not a strong reason.

> * Since `?` is a valid suffix of method names in Ruby, we already see a lot of question marks in our programs.

`&` also has other roles such as a binary operator and the prefix for block arguments.
The current syntax allows `x.&y` as a valid expression, whose behavior is the same as `x & y`,
so it may be confusing.



----------------------------------------
Feature #11537: Introduce "Safe navigation operator"
https://bugs.ruby-lang.org/issues/11537#change-54739

* Author: Hiroshi SHIBATA
* Status: Open
* Priority: Normal
* Assignee: Yukihiro Matsumoto
----------------------------------------
I sometimes write following code with rails application:

```ruby
u = User.find(id)
if u && u.profile && u.profile.thumbnails && u.profiles.thumbnails.large
  ...
```

or

```ruby
# Use ActiveSupport
if u.try!(:profile).try!(:thumbnails).try!(:large)
 ...
```
I hope to write shortly above code. Groovy has above operator named "Safe navigation operator" with "`?.`" syntax.
Ruby can't use "`?.`" operator.

Can we use "`.?`" syntax. like this:

```ruby
u = User.find(id)
u.?profile.?thumbnails.?large
```

Matz. How do you think about this?




-- 
https://bugs.ruby-lang.org/