1 files changed, 17 insertions, 0 deletions
diff --git a/lib/puppet/functions/type_of.rb b/lib/puppet/functions/type_of.rb
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+++ b/lib/puppet/functions/type_of.rb
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+# Returns the type when passed a value.
+#
+# @example how to compare values' types
+#   # compare the types of two values
+#   if type_of($first_value) != type_of($second_value) { fail("first_value and second_value are different types") }
+# @example how to compare against an abstract type
+#   unless type_of($first_value) <= Numeric { fail("first_value must be Numeric") }
+#   unless type_of{$first_value) <= Collection[1] { fail("first_value must be an Array or Hash, and contain at least one element") }
+#
+# See the documentation for "The Puppet Type System" for more information about types.
+# See the `assert_type()` function for flexible ways to assert the type of a value.
+#
+Puppet::Functions.create_function(:type_of) do
+  def type_of(value)
+    Puppet::Pops::Types::TypeCalculator.infer_set(value)
+  end
+end