bsoncxx::v_noabi::document::element Class Reference

#include <bsoncxx/v_noabi/bsoncxx/document/element.hpp>

Description

A variant view type that accesses values in serialized BSON documents.

Element functions as a variant type, where the kind of the element can be interrogated by calling type(), the key can be extracted by calling key() and a specific value can be extracted through get_X() accessors.

See also

• bsoncxx::v_noabi::array::element

Public Member Functions
	element ()
	Construct an invalid element.
types::b_array	get_array () const
	Getter for elements of the b_array type.
types::b_binary	get_binary () const
	Getter for elements of the b_binary type.
types::b_bool	get_bool () const
	Getter for elements of the b_bool type.
types::b_code	get_code () const
	Getter for elements of the b_code type.
types::b_codewscope	get_codewscope () const
	Getter for elements of the b_codewscope type.
types::b_date	get_date () const
	Getter for elements of the b_date type.
types::b_dbpointer	get_dbpointer () const
	Getter for elements of the b_dbpointer type.
types::b_decimal128	get_decimal128 () const
	Getter for elements of the b_decimal128 type.
types::b_document	get_document () const
	Getter for elements of the b_document type.
types::b_double	get_double () const
	Getter for elements of the b_double type.
types::b_int32	get_int32 () const
	Getter for elements of the b_int32 type.
types::b_int64	get_int64 () const
	Getter for elements of the b_int64 type.
types::b_maxkey	get_maxkey () const
	Getter for elements of the b_maxkey type.
types::b_minkey	get_minkey () const
	Getter for elements of the b_minkey type.
types::b_null	get_null () const
	Getter for elements of the b_null type.
types::b_oid	get_oid () const
	Getter for elements of the b_oid type.
types::bson_value::value	get_owning_value () const
	Getter for a types::bson_value::value variant wrapper of the value portion of the element. The returned object will make a copy of the buffer from this object.
types::b_regex	get_regex () const
	Getter for elements of the b_regex type.
types::b_string	get_string () const
	Getter for elements of the b_string type.
types::b_symbol	get_symbol () const
	Getter for elements of the b_symbol type.
types::b_timestamp	get_timestamp () const
	Getter for elements of the b_timestamp type.
types::b_undefined	get_undefined () const
	Getter for elements of the b_undefined type.
types::bson_value::view	get_value () const
	Getter for a types::bson_value::view variant wrapper of the value portion of the element.
stdx::string_view	key () const
	Getter for the element's key.
std::uint32_t	keylen () const
	Getter for the element's key length.
std::uint32_t	length () const
	Getter for length of the raw bson bytes the element points to.
std::uint32_t	offset () const
	Getter for the offset into the raw bson bytes the element points to.
	operator bool () const
	Conversion operator to bool which is true for valid elements and false for invalid elements.
array::element	operator[] (std::uint32_t i) const
	If this element is an array, indexes into this BSON array. If the index is out-of-bounds, an invalid array::element will be returned. As BSON represents arrays as documents, the runtime of operator[] is linear in the length of the array.
element	operator[] (stdx::string_view key) const
	If this element is a document, finds the first element of the document with the provided key. If there is no such element, an invalid document::element will be returned. The runtime of operator[] is linear in the length of the document.
const std::uint8_t *	raw () const
	Getter for the raw bson bytes the element points to.
bsoncxx::v_noabi::type	type () const
	Getter for the type of the element.

Related Symbols
(Note that these are not member symbols.)
bool	operator== (const element &elem, const types::bson_value::view &v)
	Convenience methods to compare for equality against a bson_value.
bool	operator== (const types::bson_value::view &v, const element &elem)
	Convenience methods to compare for equality against a bson_value.
bool	operator!= (const element &elem, const types::bson_value::view &v)
	Convenience methods to compare for equality against a bson_value.
bool	operator!= (const types::bson_value::view &v, const element &elem)
	Convenience methods to compare for equality against a bson_value.

Constructor & Destructor Documentation

element()

bsoncxx::v_noabi::document::element::element

(

)

Construct an invalid element.

This is useful when mapping the end iterator of a document or array view.

Member Function Documentation

get_array()

types::b_array bsoncxx::v_noabi::document::element::get_array

(

)

const

Getter for elements of the b_array type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_array.

Returns

the element's value.

get_binary()

types::b_binary bsoncxx::v_noabi::document::element::get_binary

(

)

const

Getter for elements of the b_binary type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_binary.

Returns

the element's value.

get_bool()

types::b_bool bsoncxx::v_noabi::document::element::get_bool

(

)

const

Getter for elements of the b_bool type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_bool.

Returns

the element's value.

get_code()

types::b_code bsoncxx::v_noabi::document::element::get_code

(

)

const

Getter for elements of the b_code type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_code.

Returns

the element's value.

get_codewscope()

types::b_codewscope bsoncxx::v_noabi::document::element::get_codewscope

(

)

const

Getter for elements of the b_codewscope type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_codewscope.

Returns

the element's value.

get_date()

types::b_date bsoncxx::v_noabi::document::element::get_date

(

)

const

Getter for elements of the b_date type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_date.

Returns

the element's value.

get_dbpointer()

types::b_dbpointer bsoncxx::v_noabi::document::element::get_dbpointer

(

)

const

Getter for elements of the b_dbpointer type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_dbpointer.

Returns

the element's value.

get_decimal128()

types::b_decimal128 bsoncxx::v_noabi::document::element::get_decimal128

(

)

const

Getter for elements of the b_decimal128 type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_decimal128.

Returns

the element's value.

get_document()

types::b_document bsoncxx::v_noabi::document::element::get_document

(

)

const

Getter for elements of the b_document type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_document.

Returns

the element's value.

get_double()

types::b_double bsoncxx::v_noabi::document::element::get_double

(

)

const

Getter for elements of the b_double type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_double.

Returns

the element's value.

get_int32()

types::b_int32 bsoncxx::v_noabi::document::element::get_int32

(

)

const

Getter for elements of the b_int32 type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_int32.

Returns

the element's value.

get_int64()

types::b_int64 bsoncxx::v_noabi::document::element::get_int64

(

)

const

Getter for elements of the b_int64 type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_int64.

Returns

the element's value.

get_maxkey()

types::b_maxkey bsoncxx::v_noabi::document::element::get_maxkey

(

)

const

Getter for elements of the b_maxkey type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_maxkey.

Returns

the element's value.

get_minkey()

types::b_minkey bsoncxx::v_noabi::document::element::get_minkey

(

)

const

Getter for elements of the b_minkey type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_minkey.

Returns

the element's value.

get_null()

types::b_null bsoncxx::v_noabi::document::element::get_null

(

)

const

Getter for elements of the b_null type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_null.

Returns

the element's value.

get_oid()

types::b_oid bsoncxx::v_noabi::document::element::get_oid

(

)

const

Getter for elements of the b_oid type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_oid.

Returns

the element's value.

get_owning_value()

types::bson_value::value bsoncxx::v_noabi::document::element::get_owning_value

(

)

const

Getter for a types::bson_value::value variant wrapper of the value portion of the element. The returned object will make a copy of the buffer from this object.

Returns

an owning version of the element's value.

get_regex()

types::b_regex bsoncxx::v_noabi::document::element::get_regex

(

)

const

Getter for elements of the b_regex type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_regex.

Returns

the element's value.

get_string()

types::b_string bsoncxx::v_noabi::document::element::get_string

(

)

const

Getter for elements of the b_string type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_string.

Returns

the element's value.

get_symbol()

types::b_symbol bsoncxx::v_noabi::document::element::get_symbol

(

)

const

Getter for elements of the b_symbol type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_symbol.

Returns

the element's value.

get_timestamp()

types::b_timestamp bsoncxx::v_noabi::document::element::get_timestamp

(

)

const

Getter for elements of the b_timestamp type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_timestamp.

Returns

the element's value.

get_undefined()

types::b_undefined bsoncxx::v_noabi::document::element::get_undefined

(

)

const

Getter for elements of the b_undefined type.

Exceptions

bsoncxx::v_noabi::exception

if this element is not a b_undefined.

Returns

the element's value.

get_value()

types::bson_value::view bsoncxx::v_noabi::document::element::get_value

(

)

const

Getter for a types::bson_value::view variant wrapper of the value portion of the element.

Returns

the element's value.

key()

stdx::string_view bsoncxx::v_noabi::document::element::key

(

)

const

Getter for the element's key.

Returns

the element's key.

Exceptions

bsoncxx::v_noabi::exception

if this element is invalid.

keylen()

std::uint32_t bsoncxx::v_noabi::document::element::keylen

(

)

const

Getter for the element's key length.

Returns

the element's key length.

length()

std::uint32_t bsoncxx::v_noabi::document::element::length

(

)

const

Getter for length of the raw bson bytes the element points to.

Returns

a pointer to the length of the raw bson bytes.

offset()

std::uint32_t bsoncxx::v_noabi::document::element::offset

(

)

const

Getter for the offset into the raw bson bytes the element points to.

Returns

the offset into the raw bson bytes.

operator bool()

bsoncxx::v_noabi::document::element::operator bool ( ) const

explicit

Conversion operator to bool which is true for valid elements and false for invalid elements.

operator[]() [1/2]

array::element bsoncxx::v_noabi::document::element::operator[]

(

std::uint32_t

i

)

const

If this element is an array, indexes into this BSON array. If the index is out-of-bounds, an invalid array::element will be returned. As BSON represents arrays as documents, the runtime of operator[] is linear in the length of the array.

If this element is not an array, an invalid array::element will be returned.

Parameters

i	The index of the element.

Returns

The element if it exists, or an invalid element.

operator[]() [2/2]

element bsoncxx::v_noabi::document::element::operator[]

(

stdx::string_view

key

)

const

If this element is a document, finds the first element of the document with the provided key. If there is no such element, an invalid document::element will be returned. The runtime of operator[] is linear in the length of the document.

If this element is not a document, an invalid document::element will be returned.

Parameters

key	The key to search for.

Returns

The matching element, if found, or an invalid element.

raw()

const std::uint8_t * bsoncxx::v_noabi::document::element::raw

(

)

const

Getter for the raw bson bytes the element points to.

Returns

a pointer to the raw bson bytes.

type()

bsoncxx::v_noabi::type bsoncxx::v_noabi::document::element::type

(

)

const

Getter for the type of the element.

Returns

the element's type.

Exceptions

bsoncxx::v_noabi::exception

if this element is invalid.

Friends And Related Symbol Documentation

operator!=() [1/2]

bool operator!= ( const element & elem, const types::bson_value::view & v )

related

Convenience methods to compare for equality against a bson_value.

Compares equal if the element contains a matching bson_value. Otherwise, compares unequal.

operator!=() [2/2]

bool operator!= ( const types::bson_value::view & v, const element & elem )

related

Convenience methods to compare for equality against a bson_value.

Compares equal if the element contains a matching bson_value. Otherwise, compares unequal.

operator==() [1/2]

bool operator== ( const element & elem, const types::bson_value::view & v )

related

Convenience methods to compare for equality against a bson_value.

Compares equal if the element contains a matching bson_value. Otherwise, compares unequal.

operator==() [2/2]

bool operator== ( const types::bson_value::view & v, const element & elem )

related

Convenience methods to compare for equality against a bson_value.

Compares equal if the element contains a matching bson_value. Otherwise, compares unequal.

---

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

• bsoncxx/v_noabi/bsoncxx/document/element.hpp