name: boost
old_version: 1.72.0
new_version: 1.73.0
interface_differences:
- type: 'feature'
  item: StaticString
  diff: 社区增加新特性
  influence: 增加StaticString库
- type: 'feature'
  item: Asio
  diff: 社区增加新特性
  influence: 增加ssl::host_name_verification，增加ssl::context构造函数，SSL依赖OpenSSL 1.0.2，ssl::context类会传播非EOF错误
- type: 'feature'
  item: Assert
  diff: 社区增加新特性
  influence: Assert库增加source_location
- type: 'feature'
  item: Atomic
  diff: 社区增加新特性
  influence: Atomic库增加atomic_ref、atomic_flag::test
- type: 'feature'
  item: Conversion
  diff: 社区增加新特性
  influence: Conversion库增加boost::polymorphic_downcast
- type: 'feature'
  item: data_time
  diff: 社区增加新特性
  influence: data_time支持constexpr
- type: 'feature'
  item: Geometry
  diff: 社区增加新特性
  influence: Geometry增加d3::point_xyz模型
- type: 'feature'
  item: GIL
  diff: 社区增加新特性
  influence: image类增加移动构造与移动赋值函数，any_image_view类增加size函数
- type: 'feature'
  item: Histogram
  diff: 社区增加新特性
  influence: reduce算法增加crop命令，reduce的slice命令支持category，增加count累加器，sum算法增加新参数
- type: 'feature'
  item: IO
  diff: 社区增加新特性
  influence: ostream_joiner实现基于分隔符的join
- type: 'feature'
  item: Log
  diff: 社区增加新特性
  influence: 默认sink在每个日志后自动flush
- type: 'feature'
  item: Math
  diff: 社区增加新特性
  influence: 增加Cubic Hermite Interpolation、Modified Akima Interpolation、PCHIP Interpolation、Quintic Hermite Interpolation，数值分布增加熵，增加面积计算的几种简单情况。
- type: 'feature'
  item: Mp11
  diff: 社区增加新特性
  influence: 增加mp_unique_if、mp_flatten、mp_rotate_left、mp_rotate_right、mp_compose、mp_power_set、mp_partial_sum、mp_iterate
- type: 'feature'
  item: Test
  diff: 社区增加新特性
  influence: BOOST_TEST增加tolerance indication, user message and collection comparison modifier
- type: 'feature'
  item: ThrowException
  diff: 社区增加新特性
  influence: throw_exception增加boost::source_location类型的重载
- type: 'feature'
  item: Variant2
  diff: 社区增加新特性
  influence: 支持std::hash与boost::hash
- type: 'feature'
  item: Atomic
  diff: 社区删除特性
  influence: boost/atomic/atomic.hpp不再包含boost/atomic/atomic_flag.hpp与boost/atomic/fences.hpp（涉及到的代码需改为包含boost/atomic.hpp），删除BOOST_ATOMIC_DETAIL_HIGHLIGHT_OP_AND_TEST宏（需使用*_and_test替代），atomic<T>现在考虑T的对齐要求
- type: 'ABI'
  item: data_time
  diff: data_time全部内联，可以不链接库
  influence: 无影响，社区保留了库以保持编译兼容。
- type: 'ABI'
  item: IO
  diff: 调整ostream_string至IO库，并更名为ostream_put
  influence: 用到此类的代码需要修改类名与库名
- type: 'ABI'
  item: Utility
  diff: 调整ostream_string至IO库，并更名为ostream_put
  influence: 用到此类的代码需要修改类名与库名
remark: '新增库或类，用户可以根据需要选择使用，对现有代码无影响;使用了Utility库的ostream_string、Atomic库的boost/atomic/atomic.hpp以及BOOST_ATOMIC_DETAIL_HIGHLIGHT_OP_AND_TEST宏的用户需要适配代码;'