From: no.email@nospam.invalid   
      
   albert@spenarnc.xs4all.nl writes:   
   > Jenkin's device, call-by-name parameters. That was an obscure feature   
   > got in algol60 their by accident.   
      
   I think you mean   
      
     https://en.wikipedia.org/wiki/Jensen's_device   
      
   which I was unfamiliar with.  But I thought call-by-name was not at all   
   accidental.   
      
   > That was a form of closure?   
      
   I would say that it is, but in Algol-60 I guess it can be stack   
   allocated, unlike Scheme closures which have to be on the heap.  You   
   could imagine an Algol-60 extension that allowed passing procedures as   
   values.  That in turn might require heap allocating closures.   
      
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