Deduction guide for flat

Deduction guide for flat_map

boost::container::flat_map

Synopsis

// In header: <boost/container/flat_map.hpp>


template<typename InputIterator, typename AllocatorOrCompare> 
  flat_map(ordered_unique_range_t, InputIterator, InputIterator, 
           AllocatorOrCompare const &) -> flat_map< it_based_non_const_first_type_t< InputIterator >, it_based_second_type_t< InputIterator >, typename dtl::if_c< dtl::is_allocator< AllocatorOrCompare >::value, std::less< it_based_non_const_first_type_t< InputIterator > >, AllocatorOrCompare >::type, typename dtl::if_c< dtl::is_allocator< AllocatorOrCompare >::value, AllocatorOrCompare, new_allocator< std::pair< it_based_non_const_first_type_t< InputIterator >, it_based_second_type_t< InputIterator > > > >::type >;

Description

Deduction guide: allows a flat_map to be constructed from an already ordered, unique iterator range [first, last), deducing the key and mapped types from InputIterator. The trailing argument is used as the allocator if it is an allocator type, otherwise it is used as the comparator.