[ruby-core:71417] [Ruby trunk - Feature #11537] Introduce "Safe navigation operator"

Issue #11537 has been updated by Thomas Enebo.


Nobuyoshi Nakada wrote:
> Binary operators implicitly continue the next line, without a backslash.
> 
> e.g.,
> 
> ~~~ruby
> foo +
> 1
> ~~~
> 
> is same as `foo + 1`.
> 
> If `\` were become a binary operator, there is an ambiguity.
> 
> ~~~ruby
> foo \
> 1
> ~~~
> 
> is `foo(1)` (current interpretation) or `foo\1`?


I am willing to withdraw this proposal and it is potentially ambiguous (although still able to be properly parsed) but I can count the number of times I have seen a rubyist use a line continuation with zero fingers :)  So I do not think they confusion would be very large.

-Tom

----------------------------------------
Feature #11537: Introduce "Safe navigation operator"
https://bugs.ruby-lang.org/issues/11537#change-54786

* 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?




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