[Chicken-janitors] Re: [Chicken-bugs] #331: Unit utils: Inconsistent behavior of procedures shift! & unshift!

[Chicken Scheme]

#331: Unit utils: Inconsistent behavior of procedures shift! & unshift!
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Reporter:  Jon Strait <address@hidden>  |        Owner:  kon           
    Type:  defect                             |       Status:  assigned      
Priority:  minor                              |    Component:  core libraries
 Version:  2.7                                |   Resolution:                
Keywords:                                     |  
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Changes (by kon):

  * status:  new => assigned
  * owner:  => kon

Comment:

 I will add them to the misc-extn-list since it has a wrapper macro which
 handles the empty list issue.

 The problem is shift is called 'shift!' for a reason - it modifies the
 storage - but an existing cons cell cannot "become" the empty list; '() is
 a Chicken immediate value.

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Ticket URL: <http://trac.callcc.org/ticket/331#comment:2>
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