[ruby-core:71184] [Ruby trunk - Feature #11537] Introduce "Safe navigation operator"

Issue #11537 has been updated by Gary Weaver.


Thomas Sawyer wrote:
>     u ? .profile ? .thumbnails ? .large : default

No, because then you can't do this, which is valid in current Ruby:

a = b = c = d = e = false
g = true
a ? b ? c : d : e ? f : g
=> true

----------------------------------------
Feature #11537: Introduce "Safe navigation operator"
https://bugs.ruby-lang.org/issues/11537#change-54564

* Author: Hiroshi SHIBATA
* Status: Closed
* 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?




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