ReadonlyenvirOptional Readonlygenerationsfor an operation on the frame of a caller handed on to the callers of the caller, how many calls up that frame lies
ReadonlyidReadonlykindReadonlyliteralsthe names written down as they are, as rm takes its ...
Readonlynamesthe expressions giving the names by their value
Readonlyreturnswhether a read hands back what it reads, as get does and exists does not
Optional Readonlyvaluethe value a definition binds
A call in a function body working on a variable in an environment, where the name or the environment is only known once the function is called: given by a parameter, or named by a free variable.