Print full qualification of name.
Print full qualification of type.
where:
name is the name of something that is in scope; for example, a variable, function, class template, or function template.
type is the name of a type.
-n displays the full qualification of a non-type. It is not necessary to specify -n; this is the default if you type the which command with no options.
-t displays the full qualification of a type.