std::ios_base:: event_callback
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C++
Input/output library
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(C++20)
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(C++23)
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(C++23)
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(C++23)
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(
C++98/26*
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(
C++98/26*
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(
C++98/26*
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std::ios_base
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ios_base::event_callback
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typedef
void
(
*
event_callback
)
(
event type, ios_base
&
ios,
int
index
)
;
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可通过 register_callback() 注册的函数回调类型，用于在特定事件发生时被调用。
type 是一个类型为 ios_base::event 的值，用于指示将调用此回调函数的事件类型。
ios 指代调用回调的流对象：当由 std::ios_base 和 std::basic_ios 成员函数调用回调时， * this 会作为参数传递。
index 是用户调用 register_callback() 注册函数时传入的数值参数。
参见
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复制格式化信息
(std::basic_ios<CharT,Traits> 的公开成员函数) |
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设置区域设置
(公开成员函数) |
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[virtual]
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销毁对象
(虚公开成员函数) |
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注册事件回调函数
(公开成员函数) |