unless-empty-rect-bind Macro

Summary

Binds the elements of a rectangle to four variables, and if the rectangle has a non-zero area, executes a body of code.

Package

graphics-ports

Signature

unless-empty-rect-bind ((x y width height) rectangle) &body body => result

Arguments

Values

Description

The macro unless-empty-rect-bind binds x, y, width, and height to the appropriate values from rectangle and if width and height are both positive, evaluates the forms in body as an implicit progn.