( Low level options interfaces

Info Catalog ( Runtime Options ( User level options interfaces
 33.3.1 Low Level Options Interfaces
  -- Scheme Procedure: read-options-interface [setting]
  -- Scheme Procedure: eval-options-interface [setting]
  -- Scheme Procedure: print-options-interface [setting]
  -- Scheme Procedure: debug-options-interface [setting]
  -- Scheme Procedure: evaluator-traps-interface [setting]
  -- C Function: scm_read_options (setting)
  -- C Function: scm_eval_options_interface (setting)
  -- C Function: scm_print_options (setting)
  -- C Function: scm_debug_options (setting)
  -- C Function: scm_evaluator_traps (setting)
      If one of these procedures is called with no arguments (or with
      `setting == SCM_UNDEFINED' in C code), it returns a list describing
      the current setting of the read, eval, print, debug or evaluator
      traps options respectively.  The setting of a boolean option is
      indicated simply by the presence or absence of the option symbol
      in the list.  The setting of a non-boolean option is indicated by
      the presence of the option symbol immediately followed by the
      option's current value.
      If called with a list argument, these procedures interpret the
      list as an option setting and modify the relevant options
      accordingly.  [FIXME -- this glosses over a lot of details!]
      If called with any other argument, such as `'help', these
      procedures return a list of entries like `(OPTION-SYMBOL
      DEFAULT-VALUE DOC-STRING)', with each entry giving the default
      value and documentation for each option symbol in the relevant set
      of options.
Info Catalog ( Runtime Options ( User level options interfaces
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