Erlang throw sample

参考URL：
http://erlangworld.web.fc2.com/sequential_programming/error_handling.html

ソース：
-module(try_test).
-compile(export_all).

demo1() ->
     [catcher(I) || I <- [1,2]].

catcher(N) ->
   try generate_exception(N) of
       Val -> {N, normal, Val}
   catch
       throw:X -> {N, caught, thrown, X}
   end.
  
generate_exception(1) -> a;
generate_exception(2) -> throw(b).

実行結果：

3> c(try_test).
{ok,try_test}
4> try_test:demo1().
[{1,normal,a},{2,caught,thrown,b}]
5>