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- STEP(Form:any):any EXPR
- --------------------------------------------------------------------------
- Step is a loadable option (Load Step). Evaluates form,
- single-stepping. Form is printed, preceded by -> on entry, <-> for
- macro expansions. After evaluation, Form is printed preceded by <-
- and followed by the result of evaluation. A single character is read
- at each step to determine the action to be taken:
- Control-N (Next)
- Step to the Next thing. The stepper continues until the next thing
- to print out, and it accepts another command.
- Space Go to the next thing at this level. In other words, continue to
- evaluate at this level, but don't step anything at lower levels.
- This is a good way to skip over parts of the evaluation that don't
- interest you.
- Control-U (Up)
- Continue evaluating until we go up one level. This is like the
- space command, only more so; it skips over anything on the current
- level as well as lower levels.
- Control-X (eXit)
- Exit; finish evaluating without any more stepping.
- Control-G, Control-P (Grind)
- Grind (i.e. prettyprint) the current form.
- Control-R
- Grind the form in Rlisp syntax.
- Control-E (Editor)
- Invoke the structure editor on the current form.
- Control-B (Break)
- Enter a break loop from which you can examine the values of
- variables and other aspects of the current environment.
- Control-L
- Redisplay the last 10 pending forms.
- ? Display this help file.
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