Eval takes a Forth and []Cell, pushing each element on the stack or invoking the operator if it is found in the opmap.

EvalPop takes a Forth and string, calls EvalString, and returns TOS and an error, if any.

EvalString takes a Forth and string and splits the string on space characters, calling Eval for each one.

Getop gets an op from the map.

New creates a new stack.

NewWord allows for definition of new operators from strings.

Ops returns the operator map.

Putop creates a new operation.

String returns the Top Of Stack if it is a string or panics.

Debug is an empty function that can be set to, e.g., fmt.Printf or log.Printf for debugging.

Forth is an interface used by the package.