Rescue/Catch without try block

Questions / Help
1

Forgive me for my ignorance, while perusing a few elixir/phoenix codes, I came across portions where rescue and catch were being used without a corresponding try block. Is this a syntactic sugar which implicitly have a try block?, does the community frown upon using it as I’ve read a few elixir books but never encountered the construct. IMHO it looks cleaner to me. Thank you.

 def testing_rescue do
        raise "You need to be rescue"
    rescue
        _ -> "I've been rescued by elixirforum"
 end
2

Those clauses act on the whole function body and basically remove one level of nesting if the whole body should be subject to the recovery: https://hexdocs.pm/elixir/Kernel.html#def/2-rescue-catch-after-else

I wouldn’t say it’s frowned upon, but simply not used often (like try) and people usually prefer other means of error handling.

6 Likes
3

Thanks for the swift reply, very much appreciated.

4

Clean code is great :slight_smile: use it!!

1 Like
5

I like this syntax, but I cant get it work inside anonymous functions.

Is it supposed to work ?

6

Don’t think so, since it’s part of def macro

1 Like