pb_ds/detail/basic_types.hpp

121     value_type_base<Key, null_mapped_type, Allocator, false>
128     struct value_type_base<Key, null_mapped_type, Allocator, false>
130       typedef typename Allocator::template rebind<null_mapped_type>::other mapped_type_allocator;
150       static null_mapped_type s_null_mapped;
154     null_mapped_type PB_DS_CLASS_C_DEC::s_null_mapped;
163     value_type_base<Key, null_mapped_type, Allocator, true>
170     struct value_type_base<Key, null_mapped_type, Allocator, true>
172       typedef typename Allocator::template rebind<null_mapped_type>::other mapped_type_allocator;
193       static null_mapped_type s_null_mapped;
197     null_mapped_type PB_DS_CLASS_C_DEC::s_null_mapped;
209     struct no_throw_copies<Key, null_mapped_type>