Jira (PUP-511) Specify Resource Expression Evaluation

[Henrik Lindberg (JIRA)]

Title: Message Title

Henrik Lindberg commented on an issue   Re: Specify Resource _expression_ Evaluation So, trying to answer the questions: If the title evaluates to an array and the array is empty -> noop. Yes, this is considered a normal thing and no warning is issued. The reason for this not being a warning is that it was a way to do loops to create resource, and it needs to deal with the case where everything has been filtered out. An array with nested empty subarrays is also considered to be empty -> noop, without warning. A title can not (naturally) both be empty and have other content at the same time. I.e. if an array has nested arrays in them, they just disappear when the array is flattened. If after flattening there is nothing in the array it is considered empty. Any undef result in the array makes it non empty. The entries in the title can be expressions that evaluate to String or literal default (the keyword) and the same types of values may be given in an array (with nested arrays). Any other title is illegal (literal regexp /.*/, numbers 42, etc). All titles must be unique, which also means that a literal default can only be used once. Titles that are ok: 'foo' "foo" foo [foo] [] [foo,bar] default [default] [foo, default] [[foo]] [foo, [bar]] [foo, [[[bar]]]] [sprintf("hello_%s", $::osfamily), "family $::osfamily"] i.e. any _expression_ that evaluates to string (or literal default), as a single value, or as multiple such values in an array (at any nesting level). not ok: 4 3.14 2+2 false true /.*/ undef {a => 10} The above "not ok" are also flagged as errors when placed in an array. Does that clarify things? Add Comment   Puppet / PUP-511 Specify Resource _expression_ Evaluation Resource _expression_ Evaluation requires a specification of the behavior. Here are some examples of issues in need of resolution: * if title is undef - error * if title is an array, several resources are created - what happens if   and entry is undef? Is this silently ignored, or is it an error?   * suggest it is an error (i.e. user would have to ... This message was sent by Atlassian JIRA (v6.1.4#6159-sha1:44eaede) -- You received this message because you are subscribed to the Google Groups "Puppet Bugs" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-bugs+unsubscr...@googlegroups.com. To post to this group, send email to puppet-bugs@googlegroups.com. Visit this group at http://groups.google.com/group/puppet-bugs. For more options, visit https://groups.google.com/d/optout.