--- /dev/null
+module Puppet::Parser::Functions
+
+ newfunction(:validate_bool, :doc => <<-'ENDHEREDOC') do |args|
+ Validate that all passed values are either true or false. Abort catalog
+ compilation if any value fails this check.
+
+ The following values will pass:
+
+ $iamtrue = true
+ validate_bool(true)
+ validate_bool(true, true, false, $iamtrue)
+
+ The following values will fail, causing compilation to abort:
+
+ $some_array = [ true ]
+ validate_bool("false")
+ validate_bool("true")
+ validate_bool($some_array)
+
+ ENDHEREDOC
+
+ unless args.length > 0 then
+ raise Puppet::ParseError, ("validate_bool(): wrong number of arguments (#{args.length}; must be > 0)")
+ end
+
+ args.each do |arg|
+ unless function_is_bool([arg])
+ raise Puppet::ParseError, ("#{arg.inspect} is not a boolean. It looks to be a #{arg.class}")
+ end
+ end
+
+ end
+
+end