pqxx::const_row_iterator Class Reference

Iterator for fields in a row. Use as row::const_iterator. More...

#include <row.hxx>

Inheritance diagram for pqxx::const_row_iterator:

Public Types
using	iterator_category = std::random_access_iterator_tag
using	value_type = const field
using	pointer = const field *
using	size_type = row_size_type
using	difference_type = row_difference_type
using	reference = field
Public Types inherited from pqxx::field
using	size_type = field_size_type

Public Member Functions
	const_row_iterator (const row &T, row_size_type C) noexcept
	const_row_iterator (const field &F) noexcept
Dereferencing operators
pointer	operator-> () const
reference	operator* () const
Manipulations
const_row_iterator	operator++ (int)
const_row_iterator &	operator++ ()
const_row_iterator	operator-- (int)
const_row_iterator &	operator-- ()
const_row_iterator &	operator+= (difference_type i)
const_row_iterator &	operator-= (difference_type i)
Comparisons
bool	operator== (const const_row_iterator &i) const
bool	operator!= (const const_row_iterator &i) const
bool	operator< (const const_row_iterator &i) const
bool	operator<= (const const_row_iterator &i) const
bool	operator> (const const_row_iterator &i) const
bool	operator>= (const const_row_iterator &i) const
Public Member Functions inherited from pqxx::field
	field (const row &R, row_size_type C) noexcept
	Constructor. More...
template<>
bool	to (const char *&Obj) const
	Specialization: to(const char *&). More...
bool	operator== (const field &) const
	Byte-by-byte comparison of two fields (all nulls are considered equal) More...
bool	operator!= (const field &rhs) const
	Byte-by-byte comparison (all nulls are considered equal) More...
const char *	name () const
	Column name. More...
oid	type () const
	Column type. More...
oid	table () const
	What table did this column come from? More...
row_size_type	num () const
row_size_type	table_column () const
	What column number in its originating table did this column come from? More...
const char *	c_str () const
	Read as plain C string. More...
bool	is_null () const noexcept
	Is this field's value null? More...
size_type	size () const noexcept
	Return number of bytes taken up by the field's value. More...
template<typename T >
auto	to (T &Obj) const -> typename std::enable_if<(not std::is_pointer< T >::value or std::is_same< T, const char *>::value), bool >::type
	Read value into Obj; or leave Obj untouched and return false if null. More...
template<typename T >
bool	operator>> (T &Obj) const
	Read value into Obj; or leave Obj untouched and return false if null. More...
template<typename T >
auto	to (T &Obj, const T &Default) const -> typename std::enable_if<(not std::is_pointer< T >::value or std::is_same< T, const char *>::value), bool >::type
	Read value into Obj; or use Default & return false if null. More...
template<typename T >
T	as (const T &Default) const
	Return value as object of given type, or Default if null. More...
template<typename T >
T	as () const
	Return value as object of given type, or throw exception if null. More...
template<typename T , template< typename > class O>
constexpr O< T >	get () const
	Return value wrapped in some optional type (empty for nulls) More...
array_parser	as_array () const
	Parse the field as an SQL array. More...

Arithmetic operators
const_row_iterator	operator+ (difference_type) const
const_row_iterator	operator- (difference_type) const
difference_type	operator- (const_row_iterator) const
const_row_iterator	operator+ (difference_type, const_row_iterator)

Additional Inherited Members
Protected Member Functions inherited from pqxx::field
const result &	home () const noexcept
size_t	idx () const noexcept
row_size_type	col () const noexcept
Protected Attributes inherited from pqxx::field
long	m_col

Detailed Description

Iterator for fields in a row. Use as row::const_iterator.

Member Typedef Documentation

difference_type

using pqxx::const_row_iterator::difference_type = row_difference_type

iterator_category

using pqxx::const_row_iterator::iterator_category = std::random_access_iterator_tag

pointer

using pqxx::const_row_iterator::pointer = const field *

reference

using pqxx::const_row_iterator::reference = field

size_type

using pqxx::const_row_iterator::size_type = row_size_type

value_type

using pqxx::const_row_iterator::value_type = const field

Constructor & Destructor Documentation

const_row_iterator() [1/2]

pqxx::const_row_iterator::const_row_iterator ( const row &  T, row_size_type  C  )

noexcept

const_row_iterator() [2/2]

pqxx::const_row_iterator::const_row_iterator ( const field &  F )

noexcept

Member Function Documentation

operator!=()

bool pqxx::const_row_iterator::operator!=

(

const const_row_iterator &

i

)

const

operator*()

reference pqxx::const_row_iterator::operator*

(

)

const

operator+()

const_row_iterator pqxx::const_row_iterator::operator+

(

difference_type

o

)

const

operator++() [1/2]

pqxx::const_row_iterator pqxx::const_row_iterator::operator++

(

int

)

operator++() [2/2]

const_row_iterator& pqxx::const_row_iterator::operator++

(

)

operator+=()

const_row_iterator& pqxx::const_row_iterator::operator+=

(

difference_type

i

)

operator-() [1/2]

const_row_iterator pqxx::const_row_iterator::operator-

(

difference_type

o

)

const

operator-() [2/2]

const_row_iterator::difference_type pqxx::const_row_iterator::operator-

(

const_row_iterator

i

)

const

References pqxx::field::num().

operator--() [1/2]

pqxx::const_row_iterator pqxx::const_row_iterator::operator--

(

int

)

operator--() [2/2]

const_row_iterator& pqxx::const_row_iterator::operator--

(

)

operator-=()

const_row_iterator& pqxx::const_row_iterator::operator-=

(

difference_type

i

)

operator->()

pointer pqxx::const_row_iterator::operator->

(

)

const

operator<()

bool pqxx::const_row_iterator::operator<

(

const const_row_iterator &

i

)

const

operator<=()

bool pqxx::const_row_iterator::operator<=

(

const const_row_iterator &

i

)

const

operator==()

bool pqxx::const_row_iterator::operator==

(

const const_row_iterator &

i

)

const

operator>()

bool pqxx::const_row_iterator::operator>

(

const const_row_iterator &

i

)

const

operator>=()

bool pqxx::const_row_iterator::operator>=

(

const const_row_iterator &

i

)

const

References pqxx::operator+().

Friends And Related Function Documentation

operator+

const_row_iterator operator+ ( const_row_iterator::difference_type  o, const_row_iterator  i  )

friend

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

• row.hxx
• row.cxx