Translate try to JavaScript

[elixirscript]

Translate try to JavaScript

[bryanjos]

I've implemented most of the functionality now except for else clauses.rescue is used for if the error is a struct (since Elixir exceptions are just structs). catch is used for catching thrown javascript errors. It will use the set in the clause as the type to check against in the error. An example would probably be best.

      try do
        do_something_that_may_fail(some_arg)
      rescue
        ArgumentError ->
          IO.puts "Invalid argument given"
      catch
        :throw, :Error ->
          IO.puts "caught error"
      end

would turn into

    (function(){
      try{
        return do_something_that_may_fail(some_arg)
      } catch(e){
        if(e instanceof Error){
          return IO.puts('caught error')          
        } else if(Kernel.match__qmark__({'__struct__': Erlang.list(Erlang.atom('ArgumentError'))}, e)){
          return IO.puts('Invalid argument given')
        }else{
          throw e;
        }
      }
    }.call(this));

The first if there corresponds to the catch block. The second to the rescue block. Last is throwing the error if none of the conditions match.

after is easier to explain. It just turns into a finally block.

[bryanjos]

Closing this and adding an issue for creating else