Consideration around error handling about json.filed HOT 2 OPEN

I found error handling in javascript is difficult, because for complex behavior around execution context like as "this" and amount of asynchronous processing. :(

I tried some hacking implementation in following commits ...

commit abcc127
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 22:29:24 2016 +0900

add some comment for hack and test is changed.

commit 91dc233
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 21:30:56 2016 +0900

make it possible for user to touch defaultEmitter

commit c705e2d
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 21:21:57 2016 +0900

hack to catch errors of user process to some extent.

commit 1a21e89
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 21:10:45 2016 +0900

Not happy default emitter for errors hard to trace. :(

commit 23372a9
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 20:03:07 2016 +0900

Questioable implementation of handling error event

commit cfb4d82
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 17:52:47 2016 +0900

remove mistakenly added event handler to exec

commit cebf354
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 17:49:47 2016 +0900

Listener for error is firstly coded.

from json.filed.

More commits related to error handling. 😑

commit a8b846e
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 22:17:46 2016 +0900

add some test case for testError.js

commit cfc7715
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 21:46:40 2016 +0900

Add some description around error handling

commit 9f4bedf
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 21:26:46 2016 +0900

Implement filed executer error listner

commit d0699b5
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 20:56:28 2016 +0900

Widen where error listner of each executer covers

commit 62ea1c1
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 20:46:58 2016 +0900

Enhance testError.js and fix bug around error processing

commit 0540c23
Author: Tomohito Nakayama [email protected]
Date: Mon Feb 22 06:30:49 2016 +0900

Pass event emitter to useProcess

commit 6be1b50
Author: Tomohito Nakayama [email protected]
Date: Sun Feb 21 23:19:40 2016 +0900

Hack error processing where possible.

from json.filed.