S-expressions: Difference between revisions
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</pre>
As you can see, whitespace is not preserved in non-terminal locations.
=={{header|TXR}}==
TXR is in the Lisp family, and uses S-Expressions. So right from the system prompt we can do:
<lang txr>$ txr -c '@(do (print (read)) (put-line ""))'
((data "quoted data" 123 4.5) <- input from TTY
(data (!@# (4.5) "(more" "data)")))
((data "quoted data" 123 4.5) (data (! (sys:var #) (4.5) "(more" "data)"))) <- output</lang>
However, note that the <code>@</code> character has a special meaning: <code>@#</code> turns into <code>(sys:var #)</code>. TXR's printer right now does not convert this back to <code>@</code> notation upon printing.
(TODO: A solution will appear here soon which avoids "cheating" in this way: a from-scratch S-exp parser which treats <code>!@#</code> as just a symbol.)
{{omit from|Brlcad}}
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