Boost Beast Translation (zh_Hans)/Doc / Qbk / 07 Concepts / Buffersgenerator (qbk) — Chinese (Simplified Han script) @ Boost-Weblate: * `G` denotes a type meeting the requirements of [*BuffersGenerator]. …

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Key	English	Chinese (Simplified Han script)
	BuffersGenerator	BuffersGenerator
	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.
	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.
	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 [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.
	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 [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.
	Associated Types	Associated Types
	* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`] * __ConstBufferSequence__	* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`] * __ConstBufferSequence__
	Requirements	Requirements
	In this table:	In this table:
	* `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 [link beast.ref.boost__beast__error_code `error_code&`].
	Valid expressions	Valid expressions
	Expression	Expression
	Type	Type
	Semantics, Pre/Post-conditions	Semantics, Pre/Post-conditions
45	`G::const_buffers_type`
	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 `g.prepare(ec)`.
	`c.is_done()`	`c.is_done()`
	`bool`	`bool`
	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.
	`g.prepare(ec)`	`g.prepare(ec)`
	Called to ask the generator to produce buffers containing data for processing. The returned value is the __ConstBufferSequence__ representing unconsumed data. The function will ensure that `ec.failed()` is `false` if there was no error or set to the appropriate error code if there was one. If no unconsumed data is available, this operation shall make progress to eventually reach completion. The result of invoking `prepare` after completion or encountered error(s) is defined by the generator implementation. It can not be assumed to be meaningful or safe to do so, in general. The capacity of the buffer returned is defined by the generator implementation. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.	Called to ask the generator to produce buffers containing data for processing. The returned value is the __ConstBufferSequence__ representing unconsumed data. The function will ensure that `ec.failed()` is `false` if there was no error or set to the appropriate error code if there was one. If no unconsumed data is available, this operation shall make progress to eventually reach completion. The result of invoking `prepare` after completion or encountered error(s) is defined by the generator implementation. It can not be assumed to be meaningful or safe to do so, in general. The capacity of the buffer returned is defined by the generator implementation. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.
	`g.consume(n)`	`g.consume(n)`
	This function is called to signal that the consumer (caller) of the generator has processed part of the data returned by the previous call to `prepare`. The value of `n` indicates how much of the data processed (in bytes). When `n` exceeds the number of bytes returned from the last call to `prepare`, `consume` shall behave as if `n` was equal to that number. Remaining unconsumed data will be returned from subsequent calls to `prepare`. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.	This function is called to signal that the consumer (caller) of the generator has processed part of the data returned by the previous call to `prepare`. The value of `n` indicates how much of the data processed (in bytes). When `n` exceeds the number of bytes returned from the last call to `prepare`, `consume` shall behave as if `n` was equal to that number. Remaining unconsumed data will be returned from subsequent calls to `prepare`. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.
	`is_buffers_generator<G>`	`is_buffers_generator<G>`
	`std::bool_constant`	`std::bool_constant`

	English	Chinese (Simplified Han script)	Actions
	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.
	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.
	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 [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.
	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 [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.
	Associated Types	Associated Types
	* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`] * __ConstBufferSequence__	* [link beast.ref.boost__beast__is_buffers_generator `is_buffers_generator`] * __ConstBufferSequence__
	Requirements	Requirements
	In this table:	In this table:
	* `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 [link beast.ref.boost__beast__error_code `error_code&`].
	Valid expressions	Valid expressions
	Expression	Expression
	Type	Type
	Semantics, Pre/Post-conditions	Semantics, Pre/Post-conditions
	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 `g.prepare(ec)`.
	`c.is_done()`	`c.is_done()`
	`bool`	`bool`
	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.
	`g.prepare(ec)`	`g.prepare(ec)`
	BuffersGenerator	BuffersGenerator
	Called to ask the generator to produce buffers containing data for processing. The returned value is the __ConstBufferSequence__ representing unconsumed data. The function will ensure that `ec.failed()` is `false` if there was no error or set to the appropriate error code if there was one. If no unconsumed data is available, this operation shall make progress to eventually reach completion. The result of invoking `prepare` after completion or encountered error(s) is defined by the generator implementation. It can not be assumed to be meaningful or safe to do so, in general. The capacity of the buffer returned is defined by the generator implementation. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.	Called to ask the generator to produce buffers containing data for processing. The returned value is the __ConstBufferSequence__ representing unconsumed data. The function will ensure that `ec.failed()` is `false` if there was no error or set to the appropriate error code if there was one. If no unconsumed data is available, this operation shall make progress to eventually reach completion. The result of invoking `prepare` after completion or encountered error(s) is defined by the generator implementation. It can not be assumed to be meaningful or safe to do so, in general. The capacity of the buffer returned is defined by the generator implementation. [*Note:] Any buffers obtained by previous calls to `prepare` are invalidated.
	* [link beast.ref.boost__beast__http__message_generator `http::message_generator`]	* [link beast.ref.boost__beast__http__message_generator `http::message_generator`]
	Algorithms	Algorithms
	* [link beast.ref.boost__beast__async_write `async_write`] * [link beast.ref.boost__beast__write `write`]	* [link beast.ref.boost__beast__async_write `async_write`] * [link beast.ref.boost__beast__write `write`]

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