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std::chrono::duration::operator--

时间：：持续时间：：操作员++，std：：time：：time：：Operator---

​(1)​
duration& operator++((until C++17)
constexpr duration& operator++((since C++17)
​(2)​
duration operator++(int(until C++17)
constexpr duration operator++(int(since C++17)
​(3)​
duration& operator--((until C++17)
constexpr duration& operator--((since C++17)
​(4)​
duration operator--(int(until C++17)
constexpr duration operator--(int(since C++17)

在此期间增加或减少蜱数。

如果rep_是一个成员变量，该变量保存持续时间对象中的滴答数，

1%29相当于++rep_; return *this;

2%29相当于return duration(rep_++)

3%29相当于--rep_; return *this;

4%29相当于return duration(rep_--

参数

%280%29

返回值

1，3%29修改后提及这一持续时间

2，4%29修改前所作期限的副本

例

二次

#include <chrono>
#include <iostream>
 
int main()
{
    std::chrono::hours h(1
    std::chrono::minutes m = ++h;
    m--;
    std::cout << m.count() << " minutes\n";
}

二次

产出：

二次

119 minutes

二次

另见

operator+=operator-=operator*=operator/=operator%=implements compound assignment between two durations (public member function)
operator+operator-operator*operator/operator%implements arithmetic operations with durations as arguments (function template)

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