2.40.6.11 Replacement

These two procedures are analogues of the primitive side–effect operations on pairs, set-car! and set-cdr!.

Function: ipair replace-icar ipair object

This procedure returns an ipair with object in the icar field and the icdr of ipair in the icdr field.

Function: ipair replace-icdr ipair object

This procedure returns an ipair with object in the icdr field and the icar of ipair in the icar field.