Node:User level options interfaces, Next:, Previous:Low level options interfaces, Up:Runtime Options


33.3.2 User Level Options Interfaces

<group>-options [arg] Scheme Procedure
read-options [arg] Scheme Procedure
print-options [arg] Scheme Procedure
debug-options [arg] Scheme Procedure
traps [arg] Scheme Procedure
These functions list the options in their group. The optional argument arg is a symbol which modifies the form in which the options are presented.

With no arguments, <group>-options returns the values of the options in that particular group. If arg is 'help, a description of each option is given. If arg is 'full, programmers' options are also shown.

arg can also be a list representing the state of all options. In this case, the list contains single symbols (for enabled boolean options) and symbols followed by values.

[FIXME: I don't think 'full is ever any different from 'help. What's up?]

<group>-enable option-symbol Scheme Procedure
read-enable option-symbol Scheme Procedure
print-enable option-symbol Scheme Procedure
debug-enable option-symbol Scheme Procedure
trap-enable option-symbol Scheme Procedure
These functions set the specified option-symbol in their options group. They only work if the option is boolean, and throw an error otherwise.

<group>-disable option-symbol Scheme Procedure
read-disable option-symbol Scheme Procedure
print-disable option-symbol Scheme Procedure
debug-disable option-symbol Scheme Procedure
trap-disable option-symbol Scheme Procedure
These functions turn off the specified option-symbol in their options group. They only work if the option is boolean, and throw an error otherwise.

<group>-set! option-symbol value syntax
read-set! option-symbol value syntax
print-set! option-symbol value syntax
debug-set! option-symbol value syntax
trap-set! option-symbol value syntax
These functions set a non-boolean option-symbol to the specified value.