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Extend Lisp entry 'undefine'. #34

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Extend Lisp entry 'undefine'. #34

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11 changes: 10 additions & 1 deletion markup/lisp
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Original file line number Diff line number Diff line change
Expand Up @@ -35,16 +35,20 @@
(define white\ space\ symbol 3)||##gray|//none//##||(setq white\ space\ symbol 3)||
||[[# quoting-char-in-identifiers]][#quoting-char-in-identifiers-note quoting characters in identifiers]||(setq |white space symbol| 3)||(define |white space symbol| 3)||##gray|//none//##||##gray|//none//##||
||[[# eol-comment]][#eol-comment-note end-of-line comment]||(+ 1 1) ; adding ||(+ 1 1) ; adding||(+ 1 1) ; adding||(+ 1 1) ; adding||

||[[# multiple-line-comment]][#multiple-line-comment-note multiple line comment]||(+ 1 #| adding |# 1)||##gray|//r6rs://## _
(+ 1 #| adding |# 1)|| || ||

||||||||||~ [[# var-expr]][#var-expr-note variables and expressions]||
||~ ||~ common lisp||~ racket||~ clojure||~ emacs lisp||
||[#label label] _
@<&nbsp;>@||set,setq,defun||define||def,defn||set,setq,defun||
||[#quote quote] _
@<&nbsp;>@||quote||quote||quote||quote||

||[#undefine undefine] _
@<&nbsp;>@||(makunbound 'foo)||(namespace-undefine-variable! 'foo)||(ns-unmap *ns* 'foo)||(makunbound 'foo)||
||##gray|//variables:|## _ (makunbound 'foo) _ ##gray|//functions:|## _ (fmakunbound 'bar)||(namespace-undefine-variable! 'foo)||(ns-unmap *ns* 'foo)||##gray|//variables:|## _ (makunbound 'foo) _ ##gray|//functions:|## _ (fmakunbound 'bar)||

||[#cell-types cell types] _
@<&nbsp;>@||##gray|//value, function, struct, class, ...//##||##gray|//value//##||##gray|//value//##||##gray|//value, function, struct, ...//##||
||[[# null]][#null-note null]||nil||null||nil||nil||
Expand Down Expand Up @@ -1252,6 +1256,11 @@ X
(eval (quote X))
[[/code]]

[[# undefine]]
++ undefine

Historically there have been two major types of Lisp in terms of approach to namespaces, so called //Lisp-1// and //Lisp-2//. //Lisp-1// referred to the Scheme model of single namespace for variables and functions, while //Lisp-2// referred to the Common Lisp (and earlier Maclisp) approach of having separate namespaces for the two. Common Lisp and Emacs Lisp, being examples of Lisp-2, require separate functions for undefining each type of entity. Clojure and Racket, on the other hand, are //Lisp-1//, therefore they have a single function to handle undefining.

[[# eq]]
++ eq, equal, =

Expand Down