bsoncxx::types::bson_value::value Class Reference

#include <bsoncxx/v_noabi/bsoncxx/types/bson_value/value.hpp>

Description

An owning variant type that represents any BSON type.

Owns its underlying buffer. When a bson_value::value goes out of scope, its underlying buffer is freed.

For accessors into this type and to extract the various BSON types out, please use bson_value::view.

Deprecated

Use bsoncxx::v_noabi::types::value instead (renamed).

See also

• bsoncxx::v_noabi::types::bson_value::view

Public Member Functions
	value ()=default
	Initialize with bsoncxx::v1::types::b_null.
	value (bool v)
	Constructs a BSON boolean value.
	value (char const *v)
	Constructs a BSON UTF-8 string value.
	value (double v)
	Constructs a BSON double value.
	value (std::chrono::milliseconds v)
	Constructs a BSON date value.
	value (std::int32_t v)
	Constructs a BSON 32-bit signed integer value.
	value (std::int64_t v)
	Constructs a BSON 64-bit signed integer value.
	value (std::nullptr_t)
	Constructs a BSON null value.
	value (std::string v)
	Constructs a BSON UTF-8 string value.
	value (std::uint8_t const *data, std::size_t size, v_noabi::binary_sub_type const sub_type={})
	Constructs a BSON binary data value.
	value (std::vector< unsigned char > v, v_noabi::binary_sub_type const sub_type={})
	Constructs a BSON binary data value.
template<typename T, detail::enable_if_t< has_from_v1< T >::value > * = nullptr>
	value (T v)
	Construct with the bsoncxx::v1 equivalent.
	value (v1::stdx::string_view code, v_noabi::document::view_or_value scope)
	Constructs a BSON JavaScript code with scope value.
	value (v1::stdx::string_view collection, v_noabi::oid value)
	Constructs a BSON DBPointer value.
	value (v1::stdx::string_view regex, v1::stdx::string_view options)
	Constructs a BSON regex value with options.
	value (v1::stdx::string_view v)
	Constructs a BSON UTF-8 string value.
	value (v1::types::value v)
	Construct with the bsoncxx::v1 equivalent.
	value (v_noabi::array::view v)
	Constructs a BSON array value.
	value (v_noabi::decimal128 v)
	Constructs a BSON Decimal128 value.
	value (v_noabi::document::view v)
	Constructs a BSON document value.
	value (v_noabi::oid v)
	Constructs a BSON ObjectId value.
	value (v_noabi::type const id)
	Constructs one of the following BSON values (each specified by the parenthesized type):
	value (v_noabi::type const id, std::uint64_t a, std::uint64_t b)
	Constructs one of the following BSON values (each specified by the parenthesized type):
	value (v_noabi::type const id, v1::stdx::string_view v)
	Constructs one of the following BSON values (each specified by the parenthesized type):
	value (v_noabi::types::bson_value::view const &v)
	Create an owning copy of a bson_value::view.
	operator v1::types::value () &&
	Convert to the bsoncxx::v1 equivalent.
	operator v1::types::value () const &
	Convert to the bsoncxx::v1 equivalent.
	operator v_noabi::types::bson_value::view () const noexcept
	Conversion operator that provides a bson_value::view given a bson_value::value.
v_noabi::type	type () const
	Returns the type of the underlying BSON value stored in this object.
v_noabi::type	type_id () const
	Equivalent to type() const.
v_noabi::types::bson_value::view	view () const noexcept
	Get a view over the bson_value owned by this object.
	value (v_noabi::types::b_minkey v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_double v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_string v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_document v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_array v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_binary v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_undefined v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_oid v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_bool v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_date v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_null v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_regex v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_dbpointer v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_code v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_symbol v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_codewscope v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_int32 v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_timestamp v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_int64 v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_decimal128 v)
	Construct a bson_value::value from the provided BSON type.
	value (v_noabi::types::b_maxkey v)
	Construct a bson_value::value from the provided BSON type.
v_noabi::types::b_minkey const &	get_minkey () const
	Return the underlying BSON type value.
v_noabi::types::b_double const &	get_double () const
	Return the underlying BSON type value.
v_noabi::types::b_string const &	get_string () const
	Return the underlying BSON type value.
v_noabi::types::b_document const &	get_document () const
	Return the underlying BSON type value.
v_noabi::types::b_array const &	get_array () const
	Return the underlying BSON type value.
v_noabi::types::b_binary const &	get_binary () const
	Return the underlying BSON type value.
v_noabi::types::b_undefined const &	get_undefined () const
	Return the underlying BSON type value.
v_noabi::types::b_oid const &	get_oid () const
	Return the underlying BSON type value.
v_noabi::types::b_bool const &	get_bool () const
	Return the underlying BSON type value.
v_noabi::types::b_date const &	get_date () const
	Return the underlying BSON type value.
v_noabi::types::b_null const &	get_null () const
	Return the underlying BSON type value.
v_noabi::types::b_regex const &	get_regex () const
	Return the underlying BSON type value.
v_noabi::types::b_dbpointer const &	get_dbpointer () const
	Return the underlying BSON type value.
v_noabi::types::b_code const &	get_code () const
	Return the underlying BSON type value.
v_noabi::types::b_symbol const &	get_symbol () const
	Return the underlying BSON type value.
v_noabi::types::b_codewscope const &	get_codewscope () const
	Return the underlying BSON type value.
v_noabi::types::b_int32 const &	get_int32 () const
	Return the underlying BSON type value.
v_noabi::types::b_timestamp const &	get_timestamp () const
	Return the underlying BSON type value.
v_noabi::types::b_int64 const &	get_int64 () const
	Return the underlying BSON type value.
v_noabi::types::b_decimal128 const &	get_decimal128 () const
	Return the underlying BSON type value.
v_noabi::types::b_maxkey const &	get_maxkey () const
	Return the underlying BSON type value.

Related Symbols
(Note that these are not member symbols.)
bool	operator== (value const &lhs, value const &rhs)
	Compares values for (in)-equality.
bool	operator!= (value const &lhs, value const &rhs)
	Compares values for (in)-equality.
bool	operator== (value const &lhs, view const &rhs)
	Compares a value with a view for (in)equality.
bool	operator== (view const &lhs, value const &rhs)
	Compares a value with a view for (in)equality.
bool	operator!= (value const &lhs, view const &rhs)
	Compares a value with a view for (in)equality.
bool	operator!= (view const &lhs, value const &rhs)
	Compares a value with a view for (in)equality.

Constructor & Destructor Documentation

value() [1/46]

bsoncxx::v_noabi::types::bson_value::value::value ( )

default

Initialize with bsoncxx::v1::types::b_null.

value() [2/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v1::types::value v )

inline

Construct with the bsoncxx::v1 equivalent.

value() [3/46]

template<typename T, detail::enable_if_t< has_from_v1< T >::value > * = nullptr>

bsoncxx::v_noabi::types::bson_value::value::value ( T v )

inline

Construct with the bsoncxx::v1 equivalent.

Constraints:

• from_v1(v) is found via ADL.

value() [4/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_minkey v )

inline

Construct a bson_value::value from the provided BSON type.

value() [5/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_double v )

inline

Construct a bson_value::value from the provided BSON type.

value() [6/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_string v )

inline

Construct a bson_value::value from the provided BSON type.

value() [7/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_document v )

inline

Construct a bson_value::value from the provided BSON type.

value() [8/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_array v )

inline

Construct a bson_value::value from the provided BSON type.

value() [9/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_binary v )

inline

Construct a bson_value::value from the provided BSON type.

value() [10/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_undefined v )

inline

Construct a bson_value::value from the provided BSON type.

value() [11/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_oid v )

inline

Construct a bson_value::value from the provided BSON type.

value() [12/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_bool v )

inline

Construct a bson_value::value from the provided BSON type.

value() [13/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_date v )

inline

Construct a bson_value::value from the provided BSON type.

value() [14/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_null v )

inline

Construct a bson_value::value from the provided BSON type.

value() [15/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_regex v )

inline

Construct a bson_value::value from the provided BSON type.

value() [16/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_dbpointer v )

inline

Construct a bson_value::value from the provided BSON type.

value() [17/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_code v )

inline

Construct a bson_value::value from the provided BSON type.

value() [18/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_symbol v )

inline

Construct a bson_value::value from the provided BSON type.

value() [19/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_codewscope v )

inline

Construct a bson_value::value from the provided BSON type.

value() [20/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_int32 v )

inline

Construct a bson_value::value from the provided BSON type.

value() [21/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_timestamp v )

inline

Construct a bson_value::value from the provided BSON type.

value() [22/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_int64 v )

inline

Construct a bson_value::value from the provided BSON type.

value() [23/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_decimal128 v )

inline

Construct a bson_value::value from the provided BSON type.

value() [24/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::b_maxkey v )

inline

Construct a bson_value::value from the provided BSON type.

value() [25/46]

bsoncxx::v_noabi::types::bson_value::value::value ( char const * v )

inline

Constructs a BSON UTF-8 string value.

value() [26/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::string v )

inline

Constructs a BSON UTF-8 string value.

value() [27/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v1::stdx::string_view v )

inline

Constructs a BSON UTF-8 string value.

value() [28/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::int32_t v )

inline

Constructs a BSON 32-bit signed integer value.

value() [29/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::int64_t v )

inline

Constructs a BSON 64-bit signed integer value.

value() [30/46]

bsoncxx::v_noabi::types::bson_value::value::value ( double v )

inline

Constructs a BSON double value.

value() [31/46]

bsoncxx::v_noabi::types::bson_value::value::value ( bool v )

inline

Constructs a BSON boolean value.

value() [32/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::oid v )

inline

Constructs a BSON ObjectId value.

value() [33/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::decimal128 v )

inline

Constructs a BSON Decimal128 value.

value() [34/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::chrono::milliseconds v )

inline

Constructs a BSON date value.

value() [35/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::nullptr_t )

inline

Constructs a BSON null value.

value() [36/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::document::view v )

inline

Constructs a BSON document value.

value() [37/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::array::view v )

inline

Constructs a BSON array value.

value() [38/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::vector< unsigned char > v, v_noabi::binary_sub_type const sub_type = {} )

inline

Constructs a BSON binary data value.

Parameters

v	a stream of bytes
sub_type	an optional binary sub type. Defaults to type::k_binary

value() [39/46]

bsoncxx::v_noabi::types::bson_value::value::value ( std::uint8_t const * data, std::size_t size, v_noabi::binary_sub_type const sub_type = {} )

inline

Constructs a BSON binary data value.

Parameters

data	pointer to a stream of bytes
size	the size of the stream of bytes
sub_type	an optional binary sub type. Defaults to type::k_binary

value() [40/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v1::stdx::string_view collection, v_noabi::oid value )

inline

Constructs a BSON DBPointer value.

Parameters

collection	the collection name
value	the object id

Warning

The DBPointer (aka DBRef) BSON type is deprecated. Usage is discouraged.

value() [41/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v1::stdx::string_view code, v_noabi::document::view_or_value scope )

inline

Constructs a BSON JavaScript code with scope value.

Parameters

code	the JavaScript code
scope	a bson document view holding the scope environment

value() [42/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v1::stdx::string_view regex, v1::stdx::string_view options )

inline

Constructs a BSON regex value with options.

Parameters

regex	The regex pattern
options	The regex options

value() [43/46]

bsoncxx::v_noabi::types::bson_value::value::value	(	v_noabi::type const	id,
		v1::stdx::string_view	v )

Constructs one of the following BSON values (each specified by the parenthesized type):

• BSON code value (type::k_code)
• BSON regex value (type::k_regex)
• BSON symbol value (type::k_symbol)

Parameters

id	the type of BSON value to construct.
v	the symbol, JavaScript code, or regex pattern for the BSON symbol, code, or regex value respectively.

Exceptions

bsoncxx::v_noabi::exception

if the type's value is not k_code, k_regex, or k_symbol.

Warning

The Symbol BSON type is deprecated. Usage is discouraged.

The Undefined BSON type is deprecated. Usage is discouraged.

value() [44/46]

bsoncxx::v_noabi::types::bson_value::value::value

(

v_noabi::type const

id

)

Constructs one of the following BSON values (each specified by the parenthesized type):

• BSON maxkey value (type::k_maxkey)
• BSON minkey value (type::k_minkey)
• BSON undefined value (type::k_undefined)

Parameters

id	the type of BSON value to construct.

Exceptions

bsoncxx::v_noabi::exception

if the type's value is not k_maxkey, k_minkey, or k_undefined.

value() [45/46]

bsoncxx::v_noabi::types::bson_value::value::value	(	v_noabi::type const	id,
		std::uint64_t	a,
		std::uint64_t	b )

Constructs one of the following BSON values (each specified by the parenthesized type):

• BSON decimal128 value (type::k_decimal128)
• BSON timestamp value (type::k_timestamp)

Parameters

id	the type of the BSON value to construct.
a	If a BSON decimal128 value is to be constructed, this is the high value. If a BSON timestamp value is to be constructed, this is the increment.
b	If a BSON decimal128 value is to be constructed, this is the low value. If a BSON timestamp value is to be constructed, this is the timestamp.

Exceptions

bsoncxx::v_noabi::exception

if the specified type is missing its required arguments.

Warning

The BSON timestamp type is used internally by the MongoDB server - use by clients is discouraged.

value() [46/46]

bsoncxx::v_noabi::types::bson_value::value::value ( v_noabi::types::bson_value::view const & v )

inlineexplicit

Create an owning copy of a bson_value::view.

Member Function Documentation

get_array()

v_noabi::types::b_array const & bsoncxx::v_noabi::types::bson_value::value::get_array ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_binary()

v_noabi::types::b_binary const & bsoncxx::v_noabi::types::bson_value::value::get_binary ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_bool()

v_noabi::types::b_bool const & bsoncxx::v_noabi::types::bson_value::value::get_bool ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_code()

v_noabi::types::b_code const & bsoncxx::v_noabi::types::bson_value::value::get_code ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_codewscope()

v_noabi::types::b_codewscope const & bsoncxx::v_noabi::types::bson_value::value::get_codewscope ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_date()

v_noabi::types::b_date const & bsoncxx::v_noabi::types::bson_value::value::get_date ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_dbpointer()

v_noabi::types::b_dbpointer const & bsoncxx::v_noabi::types::bson_value::value::get_dbpointer ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_decimal128()

v_noabi::types::b_decimal128 const & bsoncxx::v_noabi::types::bson_value::value::get_decimal128 ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_document()

v_noabi::types::b_document const & bsoncxx::v_noabi::types::bson_value::value::get_document ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_double()

v_noabi::types::b_double const & bsoncxx::v_noabi::types::bson_value::value::get_double ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_int32()

v_noabi::types::b_int32 const & bsoncxx::v_noabi::types::bson_value::value::get_int32 ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_int64()

v_noabi::types::b_int64 const & bsoncxx::v_noabi::types::bson_value::value::get_int64 ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_maxkey()

v_noabi::types::b_maxkey const & bsoncxx::v_noabi::types::bson_value::value::get_maxkey ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_minkey()

v_noabi::types::b_minkey const & bsoncxx::v_noabi::types::bson_value::value::get_minkey ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_null()

v_noabi::types::b_null const & bsoncxx::v_noabi::types::bson_value::value::get_null ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_oid()

v_noabi::types::b_oid const & bsoncxx::v_noabi::types::bson_value::value::get_oid ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_regex()

v_noabi::types::b_regex const & bsoncxx::v_noabi::types::bson_value::value::get_regex ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_string()

v_noabi::types::b_string const & bsoncxx::v_noabi::types::bson_value::value::get_string ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_symbol()

v_noabi::types::b_symbol const & bsoncxx::v_noabi::types::bson_value::value::get_symbol ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_timestamp()

v_noabi::types::b_timestamp const & bsoncxx::v_noabi::types::bson_value::value::get_timestamp ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

get_undefined()

v_noabi::types::b_undefined const & bsoncxx::v_noabi::types::bson_value::value::get_undefined ( ) const

inline

Return the underlying BSON type value.

Warning

Calling the wrong get_<type> method will cause an exception to be thrown.

operator v1::types::value() [1/2]

bsoncxx::v_noabi::types::bson_value::value::operator v1::types::value ( ) &&

inlineexplicit

Convert to the bsoncxx::v1 equivalent.

operator v1::types::value() [2/2]

bsoncxx::v_noabi::types::bson_value::value::operator v1::types::value ( ) const &

inlineexplicit

Convert to the bsoncxx::v1 equivalent.

operator v_noabi::types::bson_value::view()

bsoncxx::v_noabi::types::bson_value::value::operator v_noabi::types::bson_value::view ( ) const

inlinenoexcept

Conversion operator that provides a bson_value::view given a bson_value::value.

type()

v_noabi::type bsoncxx::v_noabi::types::bson_value::value::type ( ) const

inline

Returns the type of the underlying BSON value stored in this object.

Deprecated

Use type_id() const instead (renamed).

type_id()

v_noabi::type bsoncxx::v_noabi::types::bson_value::value::type_id ( ) const

inline

Equivalent to type() const.

To support incremental migration to bsoncxx::v1::types::value.

view()

v_noabi::types::bson_value::view bsoncxx::v_noabi::types::bson_value::value::view ( ) const

inlinenoexcept

Get a view over the bson_value owned by this object.

Friends And Related Symbol Documentation

operator!=() [1/3]

bool operator!= ( value const & lhs, value const & rhs )

related

Compares values for (in)-equality.

operator!=() [2/3]

bool operator!= ( value const & lhs, view const & rhs )

related

Compares a value with a view for (in)equality.

operator!=() [3/3]

bool operator!= ( view const & lhs, value const & rhs )

related

Compares a value with a view for (in)equality.

operator==() [1/3]

bool operator== ( value const & lhs, value const & rhs )

related

Compares values for (in)-equality.

operator==() [2/3]

bool operator== ( value const & lhs, view const & rhs )

related

Compares a value with a view for (in)equality.

operator==() [3/3]

bool operator== ( view const & lhs, value const & rhs )

related

Compares a value with a view for (in)equality.

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The documentation for this class was generated from the following file:

• bsoncxx/v_noabi/bsoncxx/types/bson_value/value.hpp