c++ - boost 日期时间 : time_duration from seconds to multiple days

Question

我知道我可以使用 boost::gregorian::date_duration 作为以天为单位的时间间隔，使用 boost::posix_time::time_duration 作为时间间隔，但是有没有一种简单的数据类型，我可以将其用于从几秒到几天的时间间隔？

boost::posix_time::time_duration 的限制(最大持续时间)是多少？

Answer 1

来自 the documentation :

By default the posix_time system uses a 64 bit integer and a 32 bit integer internally to provide nano-second level resolutions -- 96 bits for each time value. As an alternative, a single 64 bit integer can be used to provide a microsecond level resolution. This alternative implementation may provide better performance and more compact memory usage for many applications that do not require nano-second resolutions.

和

The variable BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG, as defined in build/Jamfile, selects between these options. To select the 64 bit integer implementation simply remove this define from the Jamfile.

就您可能而言，DevSolar 的回答在最后很好地总结了这一点。