[Chicken-janitors] #228: avoid recompilation of regular expressions, at least for simple cases

[Chicken Trac]

#228: avoid recompilation of regular expressions, at least for simple cases
--------------------------------------+-------------------------------------
 Reporter:  felix                     |       Owner:  felix
     Type:  enhancement               |      Status:  new  
 Priority:  not urgent at all         |   Milestone:       
Component:  compiler                  |     Version:       
 Keywords:  regex compilation syntax  |  
--------------------------------------+-------------------------------------
 Compiler syntax for `string-(search|match)[-positions]` with literal or
 quoted first argument could transform into code that uses a "latch":

 {{{
 (string-XXX LIT ...)

 ~>

 (let* ((T1 '#(#f))
        (T2 (##sys#slot T1 0)))
   (string-XXX
     (or T2
         (let ((T3 (regexp LIT)))
           (##sys#setslot T1 0 T3)
           T3))
     ...))
 }}}

-- 
Ticket URL: <http://www.irp.oist.jp/trac/chicken/ticket/228>
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