parse a string, emitting a series of Terms, which will hopefully be a valid schelme program.

given a namespace (for instance Prelude.prelude) and a state (see examples), and a schelme program, run the program to completion, emitting an updated namespace, state, and final Term

The way to go for incremental execution. Given an EvalBodyStep (the normal top level of a running schelme program), execute it up to /count/ evals, returning the last EvalBodyStep state.

starting with an EvalBodyStep, run to completion

continue execution of an EvalBodyStep, returning the final Term and number of evals used.

run a schelme EvalBodyStep with a max number of evals, erroring out if the max is reached.

run a schelme program, emitting the usual products but also the number of evals taken

run a schelme program with a max number of evals, erroring out if the max is reached.