compile/cdr

Symbol: compile/cdr

Syntax: (cdr EXPR)

Use-case: Compile code that evaluates EXPR (must produce a pair), then pushes the cdr of that pair. One argument.

Behaviour: Compile EXPR, then emit CDR 1. At runtime, CDR applies cdr once per unit of arg (see KOS_OP_CDR). If a popped value is not a pair or is nil, TypeError is raised. Consecutive CDR instructions may be merged by the compiler compress pass into one CDR with the sum of their counts (same for CAR).

Example:

(cdr (cons 1 (cons 2 nil)))   ; -> (2 . nil)

Also: function cdr.