| Subject: | A third typed catch block catch ( func($e) ) { ... } |
catch ( func($e) ) { ... }
Would just call func($e) and return a boolean.
Could be useful for Type::Tiny libraries, MooseX::Types libraries, etc which export functions like is_Object, is_Str, etc.
And for Ref::Util.
Would also allow people to write their own custom tests like:
sub isHttpException {
my $e = shift;
# Version 2 of the API
return 1 if blessed($e) && $e->isa('Exception::HTTP');
# Legacy version 1 API
return 1 if !ref($e) && $e =~ /^HTTP Error/;
return 0;
}
try {
$api->request(...);
}
catch ( isHttpException($e) ) {
say "request failed; try again later";
}
Maybe this strays too close to just allowing arbitrary expressions though. My request isn't for that. It's just to allow a simple one parameter function call to be used for typed catch blocks.