reg::Iterator Class Reference

Iterator class to iterator through matches. More...

#include <src/regex.h>

Collaboration diagram for reg::Iterator:

Public Types
using	value_type = Match
using	difference_type = std::ptrdiff_t
using	pointer = value_type*
using	reference = value_type&
using	iterator_category = std::forward_iterator_tag

Public Member Functions
	Iterator ()
	Creates an end-of-sequence iterator.
	Iterator (std::string_view str, const Ex &re, size_t pos=0)
	Creates an iterator for input string str, using regular expression re to search.
	Iterator (std::string &&str, const Ex &re)=delete
	Iterator (const std::string &str, Ex &&re)=delete
	Iterator (std::string &&str, Ex &&re)=delete
bool	operator== (const Iterator &rhs) const
	Returns true if the iterators point to the same match (or both are end-of-sequence iterators)
bool	operator!= (const Iterator &rhs) const
	Returns true if the iterators are not pointing to the same match.
const value_type &	operator* () const
	Returns a reference to the current match.
const value_type *	operator-> () const
	Returns a pointer to the current match.
Iterator &	operator++ ()
	Advances the iterator to the next match.

Private Member Functions
void	findNext ()

Private Attributes
std::string_view	m_str
const Ex *	m_re = nullptr
size_t	m_pos = std::string::npos
Match	m_match

Detailed Description

Iterator class to iterator through matches.

Definition at line 231 of file regex.h.

Member Typedef Documentation

difference_type

using reg::Iterator::difference_type = std::ptrdiff_t

Definition at line 235 of file regex.h.

iterator_category

using reg::Iterator::iterator_category = std::forward_iterator_tag

Definition at line 238 of file regex.h.

pointer

using reg::Iterator::pointer = value_type*

Definition at line 236 of file regex.h.

reference

using reg::Iterator::reference = value_type&

Definition at line 237 of file regex.h.

value_type

using reg::Iterator::value_type = Match

Definition at line 234 of file regex.h.

Constructor & Destructor Documentation

Iterator() [1/5]

reg::Iterator::Iterator ( )

inline

Creates an end-of-sequence iterator.

Definition at line 241 of file regex.h.

{}

Referenced by operator!=(), operator++(), and operator==().

Iterator() [2/5]

reg::Iterator::Iterator ( std::string_view str, const Ex & re, size_t pos = 0 )

inline

Creates an iterator for input string str, using regular expression re to search.

Note

the string and regular expression objects should remain valid while iterating.

Definition at line 246 of file regex.h.

      : m_str(str), m_re(&re), m_pos(pos) { findNext(); }

References findNext(), m_pos, m_re, and m_str.

Iterator() [3/5]

reg::Iterator::Iterator ( std::string && str, const Ex & re )

delete

Iterator() [4/5]

reg::Iterator::Iterator ( const std::string & str, Ex && re )

delete

Iterator() [5/5]

reg::Iterator::Iterator ( std::string && str, Ex && re )

delete

Member Function Documentation

findNext()

void reg::Iterator::findNext ( )

inlineprivate

Definition at line 271 of file regex.h.

    {
      if (!m_re || m_str.empty()) { m_pos=std::string::npos; return; } // end marker
      if (m_re->match(m_str,m_match,m_pos))
      {
        m_pos=m_match.position()+m_match.length(); // update m_pos to point beyond last match
      }
      else // no more matches, make the iterator point to the 'end-of-sequence'
      {
        m_pos=std::string::npos;
      }
    }

References m_match, m_pos, m_re, and m_str.

Referenced by Iterator(), and operator++().

operator!=()

bool reg::Iterator::operator!= ( const Iterator & rhs ) const

inline

Returns true if the iterators are not pointing to the same match.

Definition at line 259 of file regex.h.

{ return rhs.m_pos!=m_pos; }

References Iterator(), and m_pos.

operator*()

const value_type & reg::Iterator::operator* ( ) const

inline

Returns a reference to the current match.

Definition at line 262 of file regex.h.

{ return m_match; }

References m_match.

operator++()

Iterator & reg::Iterator::operator++ ( )

inline

Advances the iterator to the next match.

Definition at line 268 of file regex.h.

{ findNext(); return *this; }

References findNext(), and Iterator().

operator->()

const value_type * reg::Iterator::operator-> ( ) const

inline

Returns a pointer to the current match.

Definition at line 265 of file regex.h.

{ return &m_match;  }

References m_match.

operator==()

bool reg::Iterator::operator== ( const Iterator & rhs ) const

inline

Returns true if the iterators point to the same match (or both are end-of-sequence iterators)

Definition at line 256 of file regex.h.

{ return rhs.m_pos==m_pos; }

References Iterator(), and m_pos.

Member Data Documentation

m_match

Match reg::Iterator::m_match

private

Definition at line 286 of file regex.h.

Referenced by findNext(), operator*(), and operator->().

m_pos

size_t reg::Iterator::m_pos = std::string::npos

private

Definition at line 285 of file regex.h.

Referenced by findNext(), Iterator(), operator!=(), and operator==().

m_re

const Ex* reg::Iterator::m_re = nullptr

private

Definition at line 284 of file regex.h.

Referenced by findNext(), and Iterator().

m_str

std::string_view reg::Iterator::m_str

private

Definition at line 283 of file regex.h.

Referenced by findNext(), and Iterator().

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

• src/regex.h