libpqxx
The C++ client library for PostgreSQL
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Public Types | Public Member Functions | List of all members
pqxx::const_reverse_result_iterator Class Reference

Reverse iterator for result. Use as result::const_reverse_iterator. More...

+ Inheritance diagram for pqxx::const_reverse_result_iterator:
+ Collaboration diagram for pqxx::const_reverse_result_iterator:

Public Types

using super = const_result_iterator
 
using iterator_type = const_result_iterator
 
using value_type = iterator_type::value_type
 
using reference = iterator_type::reference
 
using difference_type = result_difference_type
 
using iterator_category = std::bidirectional_iterator_tag
 
using pointer = row const *
 

Public Member Functions

 const_reverse_result_iterator ()=default
 Create an iterator, but in an unusable state.
 
 const_reverse_result_iterator (const_reverse_result_iterator const &rhs)=default
 Copy an iterator.
 
 const_reverse_result_iterator (const_result_iterator const &rhs)
 Copy a reverse iterator from a regular iterator.
 
 const_reverse_result_iterator (const_result_iterator const &&rhs)
 Move a regular iterator into a reverse iterator.
 
PQXX_PURE const_result_iterator base () const noexcept
 Return the underlying "regular" iterator (as per standard library).
 
Manipulations
const_reverse_result_iterator & operator= (const_reverse_result_iterator const &r)
 
const_reverse_result_iterator & operator= (const_reverse_result_iterator &&r)
 
const_reverse_result_iterator & operator++ ()
 
const_reverse_result_iterator operator++ (int) &
 
const_reverse_result_iterator & operator-- ()
 
const_reverse_result_iterator operator-- (int) &
 
const_reverse_result_iterator & operator+= (difference_type i)
 
const_reverse_result_iterator & operator-= (difference_type i)
 
void swap (const_reverse_result_iterator &other) noexcept
 
Arithmetic operators
const_reverse_result_iterator operator+ (difference_type i) const
 
const_reverse_result_iterator operator- (difference_type i)
 
difference_type operator- (const_reverse_result_iterator const &rhs) const
 
Comparisons
bool operator== (const_reverse_result_iterator const &rhs) const noexcept
 
bool operator!= (const_reverse_result_iterator const &rhs) const noexcept
 
bool operator< (const_reverse_result_iterator const &rhs) const
 
bool operator<= (const_reverse_result_iterator const &rhs) const
 
bool operator> (const_reverse_result_iterator const &rhs) const
 
bool operator>= (const_reverse_result_iterator const &rhs) const
 
Dereferencing operators
const_result_iterator operator- (difference_type) const
 Dereference iterator.
 
difference_type operator- (const_result_iterator const &) const
 Dereference iterator.
 
reference operator* () const
 Dereference iterator.
 
Field access
reference back () const noexcept
 
reference front () const noexcept
 
reference at (size_type) const
 
reference at (zview col_name) const
 
constexpr result::size_type rownumber () const noexcept
 Row number, assuming this is a real row and not end()/rend().
 

Detailed Description

Reverse iterator for result. Use as result::const_reverse_iterator.

Member Function Documentation

◆ at()

pqxx::field pqxx::row::at ( zview  col_name) const

Address field by name.

Warning
This is much slower than indexing by number, or iterating.
The documentation for this class was generated from the following files: