Brandon Allbery <allber...@gmail.com> wrote:
> Two issues:
>
> (1) all standard exceptions are in or under the X:: namespace.
>
> (2) .WHAT doesn't show names with their namespaces, whereas .^name does.
>
> pyanfar Z$ 6 'my $r = 4/0; say $r; CATCH {default {say .^name}}'
> X::Numeric::DivideByZero
Thanks. I didn't get that the behavior of WHAT and ^name were that different.
> On Mon, Oct 29, 2018 at 1:04 PM Joseph Brenner <doom...@gmail.com> wrote:
>
>> I was just looking into doing some finer-grained exception handling,
>> so I tried this:
>>
>> use v6;
>> try {
>> my $result = 4/0;
>> say "result: $result";
>> CATCH {
>> # when DivideByZero { say "Oh, you know."; }
>> default { say .WHAT; .Str.say } # (DivideByZero) Attempt
>> to divide 4 by zero using div
>> }
>> }
>>
>> The first time through, The .WHAT tells me I've got
>> "DivideByZero", and so I added the line that's commented out
>> here, at which point I got the error:
>>
>> ===SORRY!===
>> Function 'DivideByZero' needs parens to avoid gobbling block (or
>> perhaps it's a class that's not declared or available in this scope?)
>>
>> Putting parens around (DivideByZero) doesn't help:
>>
>> Undeclared name:
>> DivideByZero used at line 12
>>
>> My impression was this would just work from looking
>> at the examples using things like X::AdHoc here:
>>
>> https://docs.perl6.org/language/exceptions
>>
>
>
> --
> brandon s allbery kf8nh
> allber...@gmail.com
>
