Question

I’m trying to use boost::bind with the std::sort function. I want to bind sort into a function taking no parameters and specify an int array to sort.

I’m running into issues with what to specify as the template parameter when binding sort, if I was using a standard container I would just use std::container<int>::iterator but since I’m using an array I can’t figure out what to use.

Here’s some code that illustrates my compile problem:

  const int NUM_VALUES = 100;
  int nums[NUM_VALUES];
  for (int i=0; i<NUM_VALUES; ++i)
  {
    nums[i] = NUM_VALUES - i;
  }
  boost::function<void()> sortHolder = boost::bind(&std::sort<type?>, nums, nums+NUM_VALUES);

Anyone know what template parameters to use here? Any other discussion also welcome.

Answer 1

When you want “iterators” into an array, you use pointers to elements in the array. Such pointers can be used as random access iterators:

boost::function<void()> sortHolder = 
    boost::bind(&std::sort<int*>, nums, nums + NUM_VALUES);