[FIXME: this needs to be further subbed, but texinfo has no subsubsub]
A closure is a procedure object, generated as the value of a
lambda expression in Scheme. The representation of a closure is
straightforward — it contains a pointer to the code of the lambda
expression from which it was created, and a pointer to the environment
it closes over.
In Guile, each closure also has a property list, allowing the system to store information about the closure. I'm not sure what this is used for at the moment — the debugger, maybe?
Return the property list of the closure x. The results are undefined if x is not a closure.
Set the property list of the closure x to p. The results are undefined if x is not a closure.
Return the code of the closure x. The result is undefined if x is not a closure.
This function should probably only be used internally by the interpreter, since the representation of the code is intimately connected with the interpreter's implementation.