(rnrs eval (6) library provides procedures for performing
“on-the-fly” evaluation of expressions.
Evaluates expression, which must be a datum representation of a valid Scheme expression, in the environment specified by environment. This procedure is identical to the one provided by Guile’s code library; See Fly Evaluation, for documentation.
Constructs and returns a new environment based on the specified
import-specs, which must be datum representations of the import
specifications used with the
import form. See R6RS Libraries,