Boost Beast Translation (zh_Hans)/Doc / Qbk / 07 Concepts / Dynamicbuffer (qbk) — English @ Boost-Weblate: `D::mutable_buffers

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type: table cell

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`D::mutable_buffers_type`

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	Key	English	Actions
		The interface to this concept is intended to permit the following implementation strategies:
		* A single contiguous octet array, which is reallocated as necessary to
		* A sequence of one or more octet arrays, where each array is of the same
		* A sequence of one or more octet arrays of varying sizes. Additional octet
		Associated With
		* `boost::asio::is_dynamic_buffer` * __ConstBufferSequence__ * __MutableBufferSequence__
		Requirements
		* `D` denotes a dynamic buffer class. * `a` denotes a value of type `D`. * `c` denotes a (possibly const) value of type `D`. * `n` denotes a value of type `std::size_t`. * `T` denotes a type meeting the requirements for __ConstBufferSequence__. * `U` denotes a type meeting the requirements for __MutableBufferSequence__.
		Valid expressions
		Expression
		Type
		Semantics, Pre/Post-conditions
	51	`D::const_buffers_type`
		`T`
		This type represents the memory associated with the input sequence.
	51	`D::mutable_buffers_type`
		`U`
		This type represents the memory associated with the output sequence.
		`c.size()`
	51	`std::size_t`
		Returns the size, in bytes, of the input sequence.
		`c.max_size()`
		Returns the permitted maximum of the sum of the sizes of the input sequence and output sequence.
		`c.capacity()`
		Returns the maximum sum of the sizes of the input sequence and output sequence that the dynamic buffer can hold without requiring reallocation.
		`c.data()`
		Returns a constant buffer sequence u that represents the memory associated with the input sequence, and where `buffer_size(u) == size()`.
		`a.prepare(n)`
		Returns a mutable buffer sequence u representing the output sequence, and where `buffer_size(u) == n`. The dynamic buffer reallocates memory as required. All constant or mutable buffer sequences previously obtained using `data()` or `prepare()` are invalidated. Throws: `length_error` if `size() + n` exceeds `max_size()`.
		`a.commit(n)`
		Appends `n` bytes from the start of the output sequence to the end of the input sequence. The remainder of the output sequence is discarded. If `n` is greater than the size of the output sequence, the entire output sequence is appended to the input sequence. All constant or mutable buffer sequences previously obtained using `data()` or `prepare()` are invalidated.

	Key	English	Actions
		`a.consume(n)`
		Returns a mutable buffer sequence u representing the output sequence, and where `buffer_size(u) == n`. The dynamic buffer reallocates memory as required. All constant or mutable buffer sequences previously obtained using `data()` or `prepare()` are invalidated. Throws: `length_error` if `size() + n` exceeds `max_size()`.
		`a.commit(n)`
		Appends `n` bytes from the start of the output sequence to the end of the input sequence. The remainder of the output sequence is discarded. If `n` is greater than the size of the output sequence, the entire output sequence is appended to the input sequence. All constant or mutable buffer sequences previously obtained using `data()` or `prepare()` are invalidated.
		This type represents the memory associated with the output sequence.
		`c.size()`
		Returns the size, in bytes, of the input sequence.
		`c.max_size()`
		Returns the permitted maximum of the sum of the sizes of the input sequence and output sequence.
		`c.capacity()`
		Returns the maximum sum of the sizes of the input sequence and output sequence that the dynamic buffer can hold without requiring reallocation.
		`c.data()`
		Returns a constant buffer sequence u that represents the memory associated with the input sequence, and where `buffer_size(u) == size()`.
		`a.prepare(n)`
	51	`D::mutable_buffers_type`
	51	`std::size_t`
	51	`D::const_buffers_type`

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English 25 characters editedCurrent translationState: Read-only

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06/05/2026

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type: table cell

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read-only

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56340

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string ID 51

String age

06/05/2026

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06/05/2026

Source string age

06/05/2026

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doc/qbk/07_concepts/DynamicBuffer.qbk, string 18

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