set_for_each.h

// Description: For-each for sets

#ifndef PASTELSYS_SET_FOR_EACH_H
#define PASTELSYS_SET_FOR_EACH_H

#include "pastel/sys/set/set_concept.h"
#include "pastel/sys/function/function_concept.h"

namespace Pastel
{

    //! Calls the given function for each element in the set.
    /*!
   The visitor function returns whether to continue iterating
   over elements. 

   returns:
   Whether the for-each was uninterrupted by the user.
   */
    template <
        typename Set,
        typename Element_Function,
        Requires<
            Models<Set, Set_Concept>
            // This triggers a bug in Visual Studio 2015 RC.
            /*,
           Models<Element_Function, Function_Concept<bool>(Set_Element<Set>)>
           */
        > = 0
    >
    bool forEach(
        const Set& set,
        const Element_Function& visit)
    {
        RANGES_FOR(auto&& element, set)
        {
            if (!visit(element))
            {
                return false;
            }
        }

        return true;
    }

}

#endif