prototype
- prototype
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 assystem
), prototype() returnsundef
, because the builtin does not really behave like a Perl function. Otherwise, the string describing the equivalent prototype is returned.