Re: can there be a "with" construction?

Ruby
1

matt neuburg wrote:

can even chain these tests:

with system.temp, system.startup {
string(license)
}

That means we try system.temp.license and if that doesn’t exist we
proceed to system.startup.license.

So my question is: is Ruby amenable to this kind of construction? Is
there a way to bend the language to that it acts like this? Thx - m.

Something like this?

def with(*objects)
begin
yield
rescue NoMethodError => exception
o = objects.detect { |_o|
_o.respond_to? exception.name
} or raise

o.send exception.name, *exception.args

end
end

m = with(Time) do
“aaa”.now
end

p m
Fri Oct 27 10:57:44 PDT 2006

2

On 10/27/06, Gennady B. [email protected] wrote:

UserTalk, you
there a way to bend the language to that it acts like this? Thx - m.

o.send exception.name, *exception.args

end
end

It’s a start, but:

  1. I don’t think we really want to redispatch NoMethodErrors for
    messages that had an explicit receiver. Only the ones with implicit
    receivers.

  2. it stops execution of the block after redispatching the first
    exception:

with(Time) do
“aaa”.now
puts “Never get here”
end # nothing printed

Jacob F.