Creates a new representation of the variable named $name.
Returns the string representation of the variable, that is the
Returns the type of the variable.
Simply cals strtype, its needed to be compatible with the other
elements in the structure.
Mathces a rule expression with the variable, and returns an array of
VarSet objects with this variable name set to the expression if there
Used by upper level Match procedure to match an entire expression.
Returns this variables vaule taken from $vars or a new copy of itselfe
if it does not excist.
Returns a new copy of itself.