I don't understand the question. The caller ignores the return value.
Here is an example:
#!/usr/bin/env ruby
require 'xmmsclient'
require 'xmmsclient_glib'
require 'glib2'
begin
xmms = Xmms::Client.new('test').connect(ENV['XMMS_PATH'])
rescue Xmms::Client::ClientError
exit
end
xmms.add_to_glib_mainloop
ml = GLib::MainLoop.new(nil, false)
xmms.playback_current_id.notifier do |id|
if id.zero?
puts 'There is no current ID.'
else
puts "Currently playing ID: #{id}"
end
['siduh', '9e7ryt', 83476, :moo, 83476].uniq!
end
puts 'You will notice that this message is printed before the ID.'
ml.run
Try to run it. You'll get
test.rb:29:in `run': can't convert Array into Integer (TypeError)
from test.rb:29
error message.
That is. Return value here (playback_current_id.notifier) does nothing
since it'll be executed only once anyway. However it fails.
Because in this case result of this block is
['siduh', '9e7ryt', 83476, :moo]
An array.
The code in the Ruby bindings is this:
ret = (something-that-is-actually-array)
(ret == Qnil || ret == Qfalse)
No.
(ret == Qtrue)
No.
NUM2INT(something-that-is-actually-array)
Wha...
So. Even though return value does not matter it can impact execution.
--
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