Returns the prototype of a function as a string (or
undef if the function has no prototype). FUNCTION is a reference to, or the name of, the function whose prototype you want to retrieve. If FUNCTION is omitted, $_ is used.
If FUNCTION is a string starting with
CORE:: , the rest is taken as a name for a Perl builtin. If the builtin's arguments cannot be adequately expressed by a prototype (such as
system), prototype() returns
undef, because the builtin does not really behave like a Perl function. Otherwise, the string describing the equivalent prototype is returned.
© 1993–2016 Larry Wall and others
Licensed under the GNU General Public License version 1 or later, or the Artistic License.
The Perl logo is a trademark of the Perl Foundation.