SRFI 157 is now in withdrawn status. Continuation marks are a programming language feature that allows one to attach information to and retrieve information from continuations, generalizing stack inspection. Conceptually, a continuation consists of a number of frames where each frame stands for an active procedure call that is not a tail call. A continuation mark is then a key-value pair associated with a frame, with keys compared using eq?. At most one mark for a given key can be attached to...
