[ruby-core:79525] [Ruby trunk Feature#13212][Closed] Syntax proposal: don't require begin-end to rescue exceptions inside do-end blocks

Issue #13212 has been updated by Hiroshi SHIBATA.

Status changed from Open to Closed

It's accepted by https://bugs.ruby-lang.org/issues/12906

You can use this syntax after Ruby 2.5.

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Feature #13212: Syntax proposal: don't require begin-end to rescue exceptions inside do-end blocks
https://bugs.ruby-lang.org/issues/13212#change-62973

* Author: Damian Nowak
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
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Blocks are ubiquitous in Ruby world. There's as many blocks in every Ruby code as methods - if not even more. It would be very nice to treat blocks as first class citizens like methods and reduce the undesirable begin-end boilerplate inside blocks for exception handling. Here's the syntax proposal:

~~~ ruby
arr.each do |e|
  do_something(e)
rescue MyException => e
  # handle exception
end
~~~

Just like in methods:

~~~ ruby
def method
  do_something
rescue MyException => ex
  # handle exception
end
~~~

Currently `begin-end` block is required for handling exceptions inside blocks:

~~~ ruby
arr.each do |e|
  begin
    do_something(e)
  rescue MyException => ex
    # handle exception
  end
end
~~~

Whether the same syntax would apply for {} block/lambda syntax is debatable. {} are typically one-liners and I barely ever saw a begin-rescue-end inside them.


Thank you
-Damian Nowak



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