eacd0621   
   From: daniel.kruegler@googlemail.com   
      
   Am 01.09.2011 08:32, schrieb Gene Bushuyev:   
   [..]   
   > All those mentioned algorithms were known under the name of "reduce"   
   > functions since the dawn of hardware design languages. So I would   
   > prefer them to be called the same way: or_reduce, and and_reduce. But   
   > the real question, where is the equivalent of xor_reduce? And if they   
   > do decide to add it, I can't find any descriptive name consistent with   
   > this naming convention.   
      
   I find your explanation a bit misleading. The nearest counterpart to   
   "reduce" in the standard library is the function template accumulate   
   from Clause 26. This is also indicated by the footnote 288 in the FDIS   
   document:   
      
   "accumulate is similar to the APL reduction operator and Common Lisp   
   reduce function, but it avoids the difficulty of defining the result of   
   reduction on an empty sequence by always requiring an initial value."   
      
   If you replace the (default) operation + by && you have essentially   
   all_of. The reduction operator can be applied to a large number of   
   binary operations and accumulate is customized within this operation.   
   There is no need why all_of and the like should provide the same   
   customization point, they are purely (logic) quantifier functions.   
      
   Greetings from Bremen,   
      
   - Daniel Krügler   
      
      
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