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Exemplar
Exemplar示例
06/19/2026
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The implementation calls this function every time the internal timer expires. The policy object may optionally use this opportunity to calculate elapsed time and throughput, and/or inform the algorithm used to determine subsequently queried transfer limits.
The implementation calls this function every time the internal timer expires. The policy object may optionally use this opportunity to calculate elapsed time and throughput, and/or inform the algorithm used to determine subsequently queried transfer limits.每当内部计时器到期时，实现都会调用此函数。策略对象可以选择性地利用此机会来计算已用时间和吞吐量，和/或用于优化后续查询传输上限时所使用的算法。
06/19/2026
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`a.on_timer()`
`a.on_timer()`
06/19/2026
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The implementation calls this function to inform the policy that `n` bytes were successfully transferred in the most recent write operation. The policy object may optionally use this information to calculate throughputs and/or inform the algorithm used to determine subsequently queried transfer limits.
The implementation calls this function to inform the policy that `n` bytes were successfully transferred in the most recent write operation. The policy object may optionally use this information to calculate throughputs and/or inform the algorithm used to determine subsequently queried transfer limits.实现会调用此函数，以通知策略在最近一次写入操作中已成功传输了 `n` 个字节。策略对象可以选择性地利用此信息来计算吞吐量，和/或用于优化后续查询传输上限时所使用的算法。
06/19/2026
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`a.transfer_write_bytes(n)`
`a.transfer_write_bytes(n)`
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The implementation calls this function to inform the policy that `n` bytes were successfully transferred in the most recent read operation. The policy object may optionally use this information to calculate throughputs and/or inform the algorithm used to determine subsequently queried transfer maximums.
The implementation calls this function to inform the policy that `n` bytes were successfully transferred in the most recent read operation. The policy object may optionally use this information to calculate throughputs and/or inform the algorithm used to determine subsequently queried transfer maximums.实现会调用此函数，以通知策略在最近一次读取操作中已成功传输了 `n` 个字节。策略对象可以选择性地利用此信息来计算吞吐量，和/或用于优化后续查询传输最大值时所使用的算法。
06/19/2026
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`a.transfer_read_bytes(n)`
`a.transfer_read_bytes(n)`
06/19/2026
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This function is called by the implementation to determine the maximum number of allowed bytes to be transferred in the next write operation. The actual number of bytes subsequently transferred may be less than this number.

If the policy returns a value of zero, the read operation will asynchronously wait until the next timer interval before retrying. When the retry occurs, this function will be called again.
This function is called by the implementation to determine the maximum number of allowed bytes to be transferred in the next write operation. The actual number of bytes subsequently transferred may be less than this number.

If the policy returns a value of zero, the read operation will asynchronously wait until the next timer interval before retrying. When the retry occurs, this function will be called again.实现会调用此函数，以确定下一次写入操作允许传输的最大字节数。随后实际传输的字节数可能会小于该数值。
如果该策略返回零值，写入操作将异步等待直到下一个计时器间隔再进行重试。当重试发生时，此函数将再次被调用。
06/19/2026
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`a.available_write_bytes()`
`a.available_write_bytes()`
06/19/2026
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This function is called by the implementation to determine the maximum number of allowed bytes to be transferred in the next read operation. The actual number of bytes subsequently transferred may be less than this number.

If the policy returns a value of zero, the read operation will asynchronously wait until the next timer interval before retrying. When the retry occurs, this function will be called again.
This function is called by the implementation to determine the maximum number of allowed bytes to be transferred in the next read operation. The actual number of bytes subsequently transferred may be less than this number.

If the policy returns a value of zero, the read operation will asynchronously wait until the next timer interval before retrying. When the retry occurs, this function will be called again.实现会调用此函数，以确定下一次读取操作允许传输的最大字节数。随后实际传输的字节数可能会小于该数值。

如果该策略返回零值，读取操作将异步等待直到下一个计时器间隔再进行重试。当重试发生时，此函数将再次被调用。
06/19/2026
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`std::size_t`
`std::size_t`
36
06/19/2026
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`a.available_read_bytes()`
`a.available_read_bytes()`
06/19/2026
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The member functions required in `P` should be private. [link beast.ref.boost__beast__rate_policy_access `rate_policy_access`] must be a friend of `P` for the implementation to gain access to the required member functions.
The member functions required in `P` should be private. `P` 中要求的成员函数应当是私有的。[link beast.ref.boost__beast__rate_policy_access `rate_policy_access`] must be a friend of `P` for the implementation to gain access to the required member functions.必须是 `P` 的友元，以便实现能够访问这些必需的成员函数。
06/19/2026
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`friend rate_policy_access`
`friend rate_policy_access`
06/19/2026
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Requires ['MoveConstructible].
Requires要求满足 ['MoveConstructible].。
06/19/2026
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`P a(x)`
`P a(x)`
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Semantics, Pre/Post-conditions
Semantics, Pre/Post-conditions语义，前置/后置条件
06/19/2026
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Type
Type类型
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Expression
Expression表达式
06/19/2026
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Valid expressions
Valid expressions有效表达式
06/19/2026

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