is_fixed

Purpose

Returns true if the variable passed in argument has a domain reduced to a singleton.

Synopsis

function is_fixed(var:cpvar) : boolean

function is_fixed(var:cpfloatvar) : boolean

Argument

var	the decision variable

Return value

true if var has been instantiated

Example

The following example shows how to see if a cpvar var is instantiated

if is_fixed(var) then
  write('value of var is ', getval(var))
end-if