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Called to ask the generator for its completion status.

A generator has completed when no new buffer will be produced and previously produced buffers have been fully consumed.

[*Note:] The result of invoking `prepare` on `g` once it has completed is unspecified.
Called to ask the generator for its completion status.

A generator has completed when no new buffer will be produced and previously produced buffers have been fully consumed.

[*Note:] The result of invoking `prepare` on `g` once it has completed is unspecified.用于查询该生成器的完成状态。

当该生成器不再产生新缓冲区，且先前产生的缓冲区已被完全调用时，该生成器即为已完成。

[重要提示：] 一旦该生成器已完成，再对其调用 `prepare` 的结果未定义。
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`bool`
`bool`（布尔值）
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`bool`
`bool`
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`c.is_done()`
`c.is_done()`
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A type which meets the requirements of __ConstBufferSequence__. This is the type of buffer returned by `g.prepare(ec)`.
A type which meets the requirements of __ConstBufferSequence__. This is the type of buffer returned by满足 __ConstBufferSequence__ 要求的类型。该类型用于表示 `g.prepare(ec)`. 所返回的缓冲区类型。
06/18/2026
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`G::const_buffers_type`
`G::const_buffers_type`
45
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Semantics, Pre/Post-conditions
Semantics, Pre/Post-conditions语义、前置/后置条件
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Type
Type类型
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Expression
Expression表达式
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Valid expressions
Valid expressions有效表达式
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* `G` denotes a type meeting the requirements of [*BuffersGenerator].
* `g` denotes a value of type `G`.
* `c` denotes a possibly-const value of type `G`.
* `n` is a value of type `std::size_t`.
* `ec` is a value of type [link beast.ref.boost__beast__error_code `error_code&`].
*- `G` denotes a type meeting the requirements of [*BuffersGenerator].
* `g` denotes a value of type `G`.
* `c` denotes a possibly-const value of type `G`.
* `n` is a value of type `std::size_t`.
* `ec` is a value of type用于表示满足 [*缓冲区生成器] 要求的类型。
- `g` 用于表示类型 `G` 的值。
- `c` 用于表示类型 `G` 的可能为 const 的值。
- `n` 是类型 `std::size_t` 的值。
- `ec` 是类型 [link beast.ref.boost__beast__error_code `error_code&`]. 的值。
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In this table:
In this table在下表中:
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Requirements
Requirements要求
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* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`]
* __ConstBufferSequence__
* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`]
* __ConstBufferSequence__
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Associated Types
Associated Types关联类型
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Overloads of [link beast.ref.boost__beast__write `write`] and [link beast.ref.boost__beast__async_write `async_write`] operations are provided as free functions. These operations will consume the output of a [*BuffersGenerator] and process the data by writing them to a __SyncWriteStream__ or __AsyncWriteStream__ respectively.
Overloads of [link beast.ref.boost__beast__write `write`] and与 [link beast.ref.boost__beast__async_write `async_write`] operations are provided as free functions. These operations will consume the output of a [*BuffersGenerator] and process the data by writing them to a __操作以自由函数形式提供重载。这些操作用于调用 [*缓冲区生成器] 的输出，并分别将数据写入 SyncWriteStream__ or __ 或 AsyncWriteStream__ respectively. 进行处理。
06/18/2026
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In this way, serializers can be adapted as [*BuffersGenerator], for example [link beast.ref.boost__beast__http__message_generator `http::message_generator`] which provides a type-erased interface for a variety of concrete http message types.
In this way, serializers can be adapted as [*BuffersGenerator], for example 通过这种方式，序列化器可适配为[*缓冲区生成器]，例如[link beast.ref.boost__beast__http__message_generator `http::message_generator`] which provides a type-erased interface for a variety of concrete http message types.用于为多种具体 HTTP 消息类型提供类型擦除接口。
06/18/2026
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The generator will be asked to produce buffers. The consuming code will signal how much of the data has been consumed, and repeatedly query for buffers until no more data is available, or the generator indicates an error condition.
The generator will be asked to produce buffers. The consuming code will signal how much of the data has been consumed, and repeatedly query for buffers until no more data is available, or the generator indicates an error condition.该生成器将被要求生成缓冲区。调用方代码用于指示已消费的数据量，并重复查询缓冲区，直到无更多数据可用，或该生成器指示错误条件为止。
06/18/2026
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Translation changed
A [*BuffersGenerator] provides a generalized interface for generating serialized data for sequential processing.
A [*BuffersGenerator] provides a generalized interface for generating serialized data for sequential processing.[*缓冲区生成器] 用于提供通用接口，以生成用于顺序处理的序列化数据。
06/18/2026
User avatar Bstran

Translation changed
BuffersGenerator
BuffersGenerator缓冲区生成器
06/18/2026

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