09358158   
   From: daniel.kruegler@googlemail.com   
      
   Am 28.08.2011 20:20, schrieb gast128@hotmail.com:   
   [..]   
   > Actually I have 2 requests:   
   > - all / all_if: value and predicate variants. This one I was posting   
   > about.   
      
   If you want to realize I suggest that you make a official proposal and   
   send it for consideration to the committee.   
      
   > - all / all_if working on ranges instead of [begin, end>. This will   
   > probably offered by Boost.Range in time   
      
   This won't work without a complete proposal for ranges in the library.   
   It wouldn't make sense to provide such a support for a single function   
   template.   
      
   > If the STL doesn't offer a value based one, we can still define one in   
   > our code, preferably in the implementation using the all_of varaint.   
   > Since this is a template (look at the function prototype in previous   
   > post) we cannot use the lambda expressions.   
      
   You claimed this several times and I asked for some evidence. Why   
   shouldn't this work:   
      
   #include    
   #include    
      
   template    
   bool all(For first, For last, const ValueType& rValue)   
   {   
      return std::all_of(first, last,   
         [&](const typename std::iterator_traits::value_type& value)   
        { return rValue == value; }   
      );   
   }   
      
   ?   
      
   > We can use the bind   
   > version but we might have here a small performance or build time   
   > drawback. it would be better if the STL just had defined this in the   
   > beginning (and afaiac with a consistent naming convention).   
      
   There is no reason for binding it, as shown above. If you are not   
   satisfied with the current state, you should make a proposal, but be   
   aware that this will need some time for coming part of the next   
   standard. You should try to find some more reasons except for "just for   
   completeness", because a standard with millions of variants of an   
   algorithm does not necessarily improve the state.   
      
   Greetings from Bremen,   
      
   Daniel Krügler   
      
      
      
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