Name
tie
Synopsis
tie variable, classname, list
Binds a variable to a
package class, classname, that will
provide the implementation for the variable. Any additional
arguments (list) are passed to the
“new” method of the class (meaning TIESCALAR, TIEARRAY, or TIEHASH). Typically, these are arguments
that might be passed to the dbm_open(3) function of C, but this is
package-dependent. The object returned by the “new” method is also
returned by the tie function,
which can be useful if you want to access other methods in
classname. (The object can also be
accessed through the tied
function.)
A class implementing a hash should provide the following methods:
TIEHASH $class, LIST
DESTROY $self
FETCH $self, $key
STORE $self, $key, $value
DELETE $self, $key
EXISTS $self, $key
FIRSTKEY $self
NEXTKEY $self, $lastkeyA class implementing an ordinary array should provide the following methods:
TIEARRAY $classname, LIST
DESTROY $self
FETCH $self, $subscript
STORE $self, $subscript, $valueA class implementing a scalar should provide the following methods:
TIESCALAR $classname, LIST
DESTROY $self
FETCH $self,
STORE $self, $valueUnlike dbmopen, the
tie function will not use or require a module for you—you need to do
that explicitly yourself.