`(box-location BOX [WEAK? #f]) => LOCATION`procedureReturns a

`LOCATION`object for a boxed variable, location or locatable box. Signals an exception otherwise.The locative is "strong" unless the

`WEAK?`argument is`#t`. The`WEAK?`argument is ignored for boxed variables and locations.The location of a boxed value or boxed location is the box. The location of a boxed variable is the same as

`(location (box-ref BOX))`; currently the location of a symbol may not be taken.See Locations.