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Key English Actions
[link beast.ref.boost__beast__multi_buffer `multi_buffer`]
stable
[link beast.ref.boost__beast__flat_static_buffer `flat_static_buffer`]
175
static
175
no
[link beast.ref.boost__beast__static_buffer `static_buffer`]
1-2
may invalidate
These two functions facilitate buffer interoperability with standard output streams.
Buffer Output Streams
198
Name
198
Description
[link beast.ref.boost__beast__make_printable `make_printable`]
This function wraps a __ConstBufferSequence__ so it may be used with `operator<<` and `std::ostream`.
[link beast.ref.boost__beast__ostream `ostream`]
This function returns a `std::ostream` which wraps a dynamic buffer. Characters sent to the stream using `operator<<` are stored in the dynamic buffer.
These type traits are provided to facilitate writing compile-time metafunctions which operate on buffers:
218
Buffer Algorithms and Types
218
Name
218
Description
[link beast.ref.boost__beast__buffers_iterator_type `buffers_iterator_type`]
This metafunction is used to determine the type of iterator used by a particular buffer sequence.
[link beast.ref.boost__beast__buffers_type `buffers_type`]
This metafunction is used to determine the underlying buffer type for a list of buffer sequence. The equivalent type of the alias will vary depending on the template type argument.
[link beast.ref.boost__beast__is_const_buffer_sequence `is_const_buffer_sequence`]
This metafunction is used to determine if all of the specified types meet the requirements of __ConstBufferSequence__. This type alias will be `std::true_type` if each specified type meets the requirements, otherwise, this type alias will be `std::false_type`.
[link beast.ref.boost__beast__is_mutable_buffer_sequence `is_mutable_buffer_sequence`]
This metafunction is used to determine if all of the specified types meet the requirements of __MutableBufferSequence__. This type alias will be `std::true_type` if each specified type meets the requirements, otherwise, this type alias will be `std::false_type`.
English Actions
Buffer Types
To facilitate working with instances of the __ConstBufferSequence__ and __MutableBufferSequence__ concepts introduced in __Asio__, Beast treats those sequences as a special type of range. The following algorithms and wrappers are provided which transform these ranges efficiently using lazy evaluation. No memory allocations are used in the transformations; instead, they create lightweight iterators over the existing, unmodified memory buffers. Control of buffers is retained by the caller; ownership is not transferred.
[link beast.ref.boost__beast__buffer_bytes `buffer_bytes`]
This is a more reliable version of [@boost:/doc/html/boost_asio/reference/buffer_size.html `net::buffer_size`] which is easier to use and also works for types which are convertible to `net::const_buffer` or `net::mutable_buffer`.
[link beast.ref.boost__beast__buffers_cat `buffers_cat`]
This functions returns a new buffer sequence which, when iterated, traverses the sequence which would be formed if all of the input buffer sequences were concatenated. With this routine, multiple calls to a stream's `write_some` function may be combined into one, eliminating expensive system calls.
[link beast.ref.boost__beast__buffers_cat_view `buffers_cat_view`]
1-2
may invalidate
These two functions facilitate buffer interoperability with standard output streams.
Buffer Output Streams
[link beast.ref.boost__beast__make_printable `make_printable`]
This function wraps a __ConstBufferSequence__ so it may be used with `operator<<` and `std::ostream`.
[link beast.ref.boost__beast__ostream `ostream`]
This function returns a `std::ostream` which wraps a dynamic buffer. Characters sent to the stream using `operator<<` are stored in the dynamic buffer.
These type traits are provided to facilitate writing compile-time metafunctions which operate on buffers:
[link beast.ref.boost__beast__buffers_iterator_type `buffers_iterator_type`]
This metafunction is used to determine the type of iterator used by a particular buffer sequence.
[link beast.ref.boost__beast__buffers_type `buffers_type`]
This metafunction is used to determine the underlying buffer type for a list of buffer sequence. The equivalent type of the alias will vary depending on the template type argument.
[link beast.ref.boost__beast__is_const_buffer_sequence `is_const_buffer_sequence`]
This metafunction is used to determine if all of the specified types meet the requirements of __ConstBufferSequence__. This type alias will be `std::true_type` if each specified type meets the requirements, otherwise, this type alias will be `std::false_type`.
[link beast.ref.boost__beast__is_mutable_buffer_sequence `is_mutable_buffer_sequence`]
This metafunction is used to determine if all of the specified types meet the requirements of __MutableBufferSequence__. This type alias will be `std::true_type` if each specified type meets the requirements, otherwise, this type alias will be `std::false_type`.

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String added in the repository
This function returns a `std::ostream` which wraps a dynamic buffer. Characters sent to the stream using `operator<<` are stored in the dynamic buffer.
This function returns a `std::ostream` which wraps a dynamic buffer. Characters sent to the stream using `operator<<` are stored in the dynamic buffer.
06/05/2026
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String information

Source string description
type: table cell
Flags
read-only
Unit identifier
56801
Source string location
string ID 198
String age
06/05/2026
Last updated
06/05/2026
Source string age
06/05/2026
Translation file QuickBook file
doc/qbk/03_core/5_buffers.qbk, string 70