operator<<,>> (std::discrete_distribution)

From cppreference.net

template < class CharT, class Traits > friend std:: basic_ostream < CharT,Traits > & operator << ( std:: basic_ostream < CharT,Traits > & ost, const discrete_distribution & d ) ;	(1)	(自 C++11 起)
template < class CharT, class Traits > friend std:: basic_istream < CharT,Traits > & operator >> ( std:: basic_istream < CharT,Traits > & ist, discrete_distribution & d ) ;	(2)	(自 C++11 起)

对伪随机数分布 d 执行流输入和输出操作。

1) 将分布参数和内部状态的文本表示形式写入 ost 作为文本表示。 ost 的格式化标志和填充字符保持不变。

2) 使用从 ist 读取的数据恢复分布参数和内部状态。 ist 的格式化标志保持不变。数据必须是通过具有相同区域设置、


        CharT

和


        Traits

模板参数的流写入的，否则行为未定义。若遇到错误输入，将调用 ist. setstate ( std :: ios :: failbit ) ，可能抛出 std::ios_base::failure 。在此情况下 d 保持不变。

这些函数模板对普通的非限定查找或限定查找不可见，仅当 std::discrete_distribution<ResultType> 作为参数的关联类时，才能通过实参依赖查找被发现。

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Diagnostics library
Memory management library
Metaprogramming library (C++11)
General utilities library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Technical specifications
Symbols index
External libraries

Member functions
discrete_distribution::discrete_distribution
discrete_distribution::reset
Generation
discrete_distribution::operator()
Characteristics
discrete_distribution::probabilities
discrete_distribution::param
discrete_distribution::min
discrete_distribution::max
Non-member functions
operator== operator!= (C++11) (C++11) (until C++20)
operator<< operator>> (C++11) (C++11)

目录