@JoePea, that is one of the syntaxes I recommend in the proposal.
@michalwadas The primary goal of this I think is to create a standard feature,
but I do not see why an expression wrapped in parenthesis ultimately resulting
in an error class would not be supported.
Example:
...
} catch (await FCL.load(...), await FCL.load(...)) (e) {
...
Or something similar for all of the other recommended syntaxes, replacing the
declared class instead with an expression (similar to class extension).
Sent from my iPhone
> On May 13, 2016, at 12:54 PM, /#!/JoePea <[email protected]> wrote:
>
> Perhaps a syntax based on modules:
>
> ```js
> try {}
> catch (TypeError as e) {}
>
> // ...
>
> try {}
> catch (MyError as err) {}
> ```
>
>> On Fri, May 13, 2016 at 9:43 AM, Michał Wadas <[email protected]> wrote:
>> I can't see why would your syntax be superior to SpiderMonkey extension
>> except saving few characters.
>>
>> Can your syntax support code like this:
>>
>> async function foo() {
>> try {
>> throw new Error();
>> } catch(e if isNativeException(e)) {
>> // special handler for DOM exceptions
>> } catch(e if e instanceof (await
>> fancyClassLoader.load('classes/SomeLibrary/UserDefinedError'))) {
>> // load class asynchronously if it wasn't loaded
>> }
>> }
>>
>> ?
>>
>>
>> On Fri, May 13, 2016 at 5:58 PM, Joseph Groseclose <[email protected]>
>> wrote:
>>>
>>> I've updated the proposal. See:
>>> https://github.com/benderTheCrime/error-type-specific-catch-proposal#about-spidermonkey-implementation
>>>
>>> On Fri, May 13, 2016 at 11:49 AM, Joseph Groseclose <[email protected]>
>>> wrote:
>>>>
>>>> Nevertheless, perhaps the non-standard implementation could work
>>>> hand-in-hand with the proposal, where SpiderMonkey could support both
>>>> solutions in parallel for backward compatibility. I think that the proposed
>>>> solution is more expressive.
>>>>
>>>> On Fri, May 13, 2016 at 11:26 AM, Claude Pache <[email protected]>
>>>> wrote:
>>>>>
>>>>> Note that SpiderMonkey has already nonstandard conditional catch
>>>>> clauses:
>>>>>
>>>>> ```js
>>>>> try {
>>>>> // ...
>>>>> }
>>>>> catch (e if e instanceof TypeError) {
>>>>> // ....
>>>>> }
>>>>> ```
>>>>>
>>>>> —Claude
>>>>>
>>>>>
>>>>> Le 13 mai 2016 à 17:06, Joseph Groseclose <[email protected]> a écrit
>>>>> :
>>>>>
>>>>> I sent this proposal via
>>>>> http://www.ecma-international.org/memento/contribute_TC39_Royalty_Free_Task_Group.php#
>>>>> yesterday evening. Sharing it here now:
>>>>> https://github.com/benderTheCrime/error-type-specific-catch-proposal
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> es-discuss mailing list
>>>>> [email protected]
>>>>> https://mail.mozilla.org/listinfo/es-discuss
>>>
>>>
>>> _______________________________________________
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>>> https://mail.mozilla.org/listinfo/es-discuss
>>
>>
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