11.4 Eval🔗ℹ

An evaluator is an interactive evaluation context. Each evaluator has its own set of bindings and, potentially, its own set of module declarations. A Rhombus read-eval-print loop (REPL) is backed by an evaluator, for example.

If as_interaction is true, then seq is evaluated as if in a read-eval-print loop. Depending on the bindings of the current evaluator (as determined by Evaluator.current), that can be different that evaluating non-interaction top-level forms.

A suitable evaluator must have been created and installed as the value of the Evaluator.current context parameter, since the default evaluator is empty.

> parameterize { Evaluator.current: Evaluator.make_rhombus() }:     eval('1 + 2')

3

If export_name is #false, then the result is #void. Otherwise, the value exported by mod as export_name is returned, or an exception is thrown if no such export is available.