--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stdlib/lib/puppet/functions/sprintf_hash.rb	Fri Jan 03 19:56:04 2020 +0000
@@ -0,0 +1,29 @@
+# Uses sprintf with named references.
+#
+# The first parameter is format string describing how the rest of the parameters in the hash
+# should be formatted. See the documentation for the `Kernel::sprintf` function in Ruby for
+# all the details.
+#
+# In the given argument hash with parameters, all keys are converted to symbols so they work
+# with the `sprintf` function.
+#
+# @example Format a string and number
+#   $output = sprintf_hash('String: %<foo>s / number converted to binary: %<number>b',
+#                          { 'foo' => 'a string', 'number' => 5 })
+#   # $output = 'String: a string / number converted to binary: 101'
+#
+Puppet::Functions.create_function(:sprintf_hash) do
+  # @param format The format to use.
+  # @param arguments Hash with parameters.
+  # @return The formatted string.
+  dispatch :sprintf_hash do
+    param 'String', :format
+    param 'Hash', :arguments
+    # Disabled for now. This gives issues on puppet 4.7.1.
+    # return_type 'String'
+  end
+
+  def sprintf_hash(format, arguments)
+    Kernel.sprintf(format, Hash[arguments.map { |(k, v)| [k.to_sym, v] }])
+  end
+end