reg::Match Class Reference

Object representing the matching results. More...

#include <src/regex.h>

Public Member Functions
	Match ()
	Creates an empty match object.
size_t	position () const
	Returns the position of the match or std::string::npos if no position is set.
size_t	length () const
	Returns the position of the match or std::string::npos if no length is set.
std::string	str () const
	Return a string representing the matching part.
SubMatch	prefix () const
	Return the part of the string before the match.
SubMatch	suffix () const
	Return the part of the string after the match.
size_t	size () const
	Returns the number of sub matches available in this match.
const SubMatch &	operator[] (size_t index) const
	Returns the n-th SubMatch object.

Private Member Functions
void	init (std::string_view str, size_t captureCount)
void	startCapture (size_t groupId, size_t index)
void	endCapture (size_t groupId, size_t index)
void	setMatch (size_t pos, size_t len)

Private Attributes
std::vector< SubMatch >	m_subMatches
std::string_view	m_str

Friends
class	Ex

Detailed Description

Object representing the matching results.

It consists of an array of SubMatch objects. The first entry of the array represents the whole match, any next elements represent each of the capture ranges.

For example string @42 and expression @(\\d+) will have two Submatches, match[0] will point to the input string as a whole, and match[1] will point to the number 42 only.

Definition at line 150 of file regex.h.

Constructor & Destructor Documentation

Match()

reg::Match::Match ( )

inline

Creates an empty match object.

Definition at line 154 of file regex.h.

{}

Member Function Documentation

endCapture()

void reg::Match::endCapture ( size_t groupId, size_t index )

inlineprivate

Definition at line 213 of file regex.h.

    {
      if (groupId < m_subMatches.size())
      {
        if (index>=m_subMatches[groupId].position())
        {
          m_subMatches[groupId].setEnd(index);
        }
      }
    }

References m_subMatches, and position().

init()

void reg::Match::init ( std::string_view str, size_t captureCount )

inlineprivate

Definition at line 196 of file regex.h.

    {
      m_subMatches.clear();
      m_subMatches.reserve(captureCount+1);
      for (size_t i=0;i<captureCount+1;i++)
      {
        m_subMatches.emplace_back(str);
      }
      m_str = str;
    }

References m_str, m_subMatches, and str().

Referenced by reg::Ex::Private::matchAt().

length()

size_t reg::Match::length ( ) const

inline

Returns the position of the match or std::string::npos if no length is set.

Definition at line 160 of file regex.h.

{ return m_subMatches[0].length();   }

References m_subMatches.

Referenced by addValidAliasToMap(), reg::Iterator::findNext(), reg::Ex::Private::matchAt(), suffix(), and MemberDefImpl::writeDeclaration().

operator[]()

const SubMatch & reg::Match::operator[] ( size_t index ) const

inline

Returns the n-th SubMatch object.

Note that there is always 1 SubMatch object representing the whole match.

Definition at line 192 of file regex.h.

{ return m_subMatches[index]; }

References m_subMatches.

position()

size_t reg::Match::position ( ) const

inline

Returns the position of the match or std::string::npos if no position is set.

Definition at line 157 of file regex.h.

{ return m_subMatches[0].position(); }

References m_subMatches.

Referenced by addValidAliasToMap(), endCapture(), reg::Iterator::findNext(), reg::Ex::Private::matchAt(), prefix(), size(), suffix(), and MemberDefImpl::writeDeclaration().

prefix()

SubMatch reg::Match::prefix ( ) const

inline

Return the part of the string before the match.

Definition at line 166 of file regex.h.

{ SubMatch m(m_str); m.setMatch(0,position()); return m; }

References m_str, position(), and reg::SubMatch::setMatch().

Referenced by MemberDefImpl::displayDefinition(), and MemberDefImpl::writeDocumentation().

setMatch()

void reg::Match::setMatch ( size_t pos, size_t len )

inlineprivate

Definition at line 223 of file regex.h.

    {
      // Always set the whole match
      m_subMatches[0].setMatch(pos,len);
    }

References m_subMatches.

size()

size_t reg::Match::size ( ) const

inline

Returns the number of sub matches available in this match.

Only counts groups that actually matched (trailing unmatched optional groups are excluded).

Definition at line 182 of file regex.h.

    {
      size_t s = m_subMatches.size();
      while (s > 1 && m_subMatches[s-1].position() == std::string::npos) s--;
      return s;
    }

References m_subMatches, and position().

Referenced by addValidAliasToMap(), and reg::Ex::Private::matchAt().

startCapture()

void reg::Match::startCapture ( size_t groupId, size_t index )

inlineprivate

Definition at line 206 of file regex.h.

    {
      if (groupId < m_subMatches.size())
      {
        m_subMatches[groupId].setStart(index);
      }
    }

References m_subMatches.

str()

std::string reg::Match::str ( ) const

inline

Return a string representing the matching part.

Definition at line 163 of file regex.h.

{ return std::string{m_subMatches[0].str()}; }

References m_subMatches.

Referenced by addValidAliasToMap(), init(), and initPredefined().

suffix()

SubMatch reg::Match::suffix ( ) const

inline

Return the part of the string after the match.

Definition at line 169 of file regex.h.

    {
      SubMatch m(m_str);
      if (!m_str.empty())
      {
        size_t e = position()+length();
        m.setMatch(e,m_str.length()-e);
      }
      return m;
    }

References length(), m_str, position(), and reg::SubMatch::setMatch().

Referenced by MemberDefImpl::displayDefinition(), and MemberDefImpl::writeDocumentation().

Friends And Related Symbol Documentation

Ex

friend class Ex

friend

Definition at line 195 of file regex.h.

References Ex.

Referenced by Ex.

Member Data Documentation

m_str

std::string_view reg::Match::m_str

private

Definition at line 230 of file regex.h.

Referenced by init(), prefix(), and suffix().

m_subMatches

std::vector<SubMatch> reg::Match::m_subMatches

private

Definition at line 229 of file regex.h.

Referenced by endCapture(), init(), length(), operator[](), position(), setMatch(), size(), startCapture(), and str().

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

• src/regex.h