
get_var_bounds(?Var, -Lower, -Upper)

   Retrieve bounds of a numeric variable in a generic way

Arguments
   Var                 Variable or number.
   Lower               Float or variable.
   Upper               Float or variable.

Type
   Term Manipulation

Description
    This predicate is intended to be used on attributed variables that
    have a numeric domain.  The bound information is collected from the
    variable's attributes via their get_bounds-handlers. If several
    attributes contain bound information, the results are intersected
    to produce the tightest bound information available. An empty bound
    (Lower > Upper) can be returned.

    The bounds are always returned as floating point numbers, regardless
    of any integrality constraint on the variable.


Modes and Determinism
   get_var_bounds(?, -, -) is det

Exceptions
     5 --- Var is not a variable or number

Examples
   
    [eclipse 1]: lib(fd), lib(ic).
    yes.

    [eclipse 2]: ic:(X::3.0..9.0), fd:(X::1..7), get_var_bounds(X,L,U).
    X = X{ic : 3.0..9.0, fd:[1..7]}
    L = 3.0
    U = 7.0
    Yes (0.00s cpu)

    [eclipse 3]: get_var_bounds(X,L,U).
    X = X
    L = -1.0Inf
    U = 1.0Inf
    yes.

    [eclipse 4]: get_var_bounds(5,L,U).
    L = 5.0
    U = 5.0
    yes.

    [eclipse 5]: get_var_bounds(a,L,U).
    type error in get_var_bounds(a, L, U)


See Also
   set_var_bounds / 3
