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7.4.5 Reference Documentation for
- Scheme Procedure: option-ref options key default
Search options for a command line option named key and return its value, if found. If the option has no value, but was given, return
#t. If the option was not given, return default. options must be the result of a call to
option-ref always succeeds, either by returning the requested
option value from the command line, or the default value.
The special key
'() can be used to get a list of all
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