Re: Is there a min function that accepts any number of arguments?

Marco Manfredini <>
Thu, 04 Sep 2008 19:27:37 +0200
Peng Yu wrote:


I'm wondering if there is a min function (in boost, maybe?) that
accepts any number of arguments? std::min only accepts two arguments.
If I want to get the minimum number out of many, I have use std::min
many times, which is not convenient.

Well, if you really want it:
namespace peng_yu
  template<typename T>
  struct tmp_min_t
  const T &item;
  tmp_min_t(const T &n) : item(n) {}
  operator const T& () const { return item; }
  struct minimum_t {} minimum;
  template<typename T>
  inline tmp_min_t<T> operator , (minimum_t, const T &x)
      return tmp_min_t<T>(x);
  template<class T>
  inline tmp_min_t<T> operator , (tmp_min_t<T> a, const T &x)
    if (a.item<=x) return a;
    else return tmp_min_t<T>(x);

#define MIN(...) (peng_yu::minimum,__VA_ARGS__)

#include <iostream>
int main()
    << MIN(6,5,4,5,1,5,3,5,7,4,3,4,6,8,5,3,2,-23,5,2,2,4,6,4,4,3,4)
    << std::endl;
You'll need a compiler with C99-style variadic macro support though
(which is supported by most compilers I am aware of), or preprocess
your source accordingly.

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