www.delorie.com/gnu/docs/kawa/kawa_28.html   search  
 
Buy GNU books!


Kawa, the Java-based Scheme system

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

7.3 Special named constants

Constant: #!optional
Special self-evaluating literal used in lambda parameter lists before optional parameters.

Constant: #!rest
Special self-evaluating literal used in lambda parameter lists before the rest parameter.

Constant: #!key
Special self-evaluating literal used in lambda parameter lists before keyword parameters.

Constant: #!eof
The end-of-file object.

Note that if the Scheme reader sees this literal at top-level, it is returned literally. This is indistinguishable from coming to the end of the input file. If you do not want to end reading, but want the actual value of #!eof, you should quote it.

Constant: #!void
The void value. Same as (values). If this is the value of an expression in a read-eval-print loop, nothing is printed.

Constant: #!null
The Java null value. This is not really a Scheme value, but is useful when interfacing to low-level Java code.


  webmaster     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003