On Mon, Jul 16, 2012 at 10:56 AM, Nan Liu <n...@puppetlabs.com> wrote:
>
>
> empty() should be an rvalue function. In this case posting the empty()
> function would be more helpful than the puppet manifests.
>
> Nan
>
>
It's the standard one shipped with stdlib:
modules/stdlib/lib/puppet/parser/functions/empty.rb
#
# empty.rb
#
module Puppet::Parser::Functions
newfunction(:empty, :type => :rvalue, :doc => <<-EOS
Returns true if the variable is empty.
EOS
) do |arguments|
raise(Puppet::ParseError, "empty(): Wrong number of arguments " +
"given (#{arguments.size} for 1)") if arguments.size < 1
value = arguments[0]
klass = value.class
unless [Array, Hash, String].include?(klass)
raise(Puppet::ParseError, 'empty(): Requires either ' +
'array, hash or string to work with')
end
result = value.empty?
return result
end
end
# vim: set ts=2 sw=2 et :
--dlloyd
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