Gets and set the left element of a rectangle.
graphics-ports
rectangle-left rectangle => left
(setf rectangle-left) left rectangle => left
rectangle
A rectangle.
left
A real number.
The macro rectangle-left returns and via setf sets the left element of rectangle .
rectangle-left
setf
rectangle is a list of numbers ( left top right bottom ).
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017