File indexing completed on 2024-04-28 09:37:37

 // clang-format off
 /*
  * KDiff3 - Text Diff And Merge Tool
  *
  * SPDX-FileCopyrightText: 2018-2020 Michael Reeves reeves.87@gmail.com
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 // clang-format on
 
 #ifndef COMBINERS_H
 #define COMBINERS_H
 
 #include <QtGlobal>
 
 #include <boost/signals2.hpp>
 #include <type_traits>
 
 struct or_
 {
     typedef bool result_type;
     template <typename InputIterator> bool operator()(InputIterator first, InputIterator last) const
     {
         // If there are no slots to call, just return true
         if(first == last) return true;
 
         bool ret = *first++;
         //return true if any slot returns true
         while(first != last)
         {
             if(!ret)
                 ret = *first;
             ++first;
         }
 
         return ret;
     }
 };
 
 struct and_
 {
     typedef bool result_type;
     template <typename InputIterator> bool operator()(InputIterator first, InputIterator last) const
     {
         // If there are no slots to call, just return true
         if(first == last) return true;
 
         bool ret = *first++;
         //return first non-true as if && were used
         while(ret && first != last)
         {
             ret = *first;
             ++first;
         }
 
         return ret;
     }
 };
 
 template<typename T> struct FirstNonEmpty
 {
     //This just provides a better error message if an inappropriate parameter is passed.
     static_assert(std::is_class<typename std::remove_reference<T>::type>(), "First parameter must be a class.");
     static_assert(std::is_same<decltype(std::declval<T>().isEmpty()), bool>(),
         "First parameter must implement or inherit isEmpty().");
 
     typedef T result_type;
     template <typename InputIterator> T operator()(InputIterator first, InputIterator last) const
     {
         // If there are no slots to call, just return empty container
         if(first == last) return T();
 
         T ret = *first++;
         //return first non-true as if && were used
         while(ret.isEmpty() && first != last)
         {
             ret = *first;
             ++first;
         }
 
         return ret;
     }
 };
 
 //Like 'or' but default to false if there are no connections and stops looking once true is returned.
 struct find
 {
     typedef bool result_type;
     template <typename InputIterator> bool operator()(InputIterator first, InputIterator last) const
     {
         // If there are no slots to call, just return true
         if(first == last)
             return false;
 
         bool found = *first++;
         //return true if any slot returns true
         while(first != last && !found)
         {
             found = *first;
             ++first;
         }
 
         return found;
     }
 };
 #ifdef BOOST_NO_EXCEPTIONS
 //Because boost doesn't define this
 inline void boost::throw_exception([[maybe_unused]] std::exception const& e)
 {
     std::terminate();
 }
 #endif
 
 #endif // !COMBINERS_H