31 Regular expressions library [re]

31.11 Regular expression algorithms [re.alg]

31.11.4 regex_­replace [re.alg.replace]

template <class OutputIterator, class BidirectionalIterator, class traits, class charT, class ST, class SA> OutputIterator regex_replace(OutputIterator out, BidirectionalIterator first, BidirectionalIterator last, const basic_regex<charT, traits>& e, const basic_string<charT, ST, SA>& fmt, regex_constants::match_flag_type flags = regex_constants::match_default); template <class OutputIterator, class BidirectionalIterator, class traits, class charT> OutputIterator regex_replace(OutputIterator out, BidirectionalIterator first, BidirectionalIterator last, const basic_regex<charT, traits>& e, const charT* fmt, regex_constants::match_flag_type flags = regex_constants::match_default);

1
#

Effects: Constructs a regex_­iterator object i as if by 

regex_iterator<BidirectionalIterator, charT, traits> i(first, last, e, flags)

and uses i to enumerate through all of the matches m of type match_­results<BidirectionalIterator> that occur within the sequence [first, last). If no such matches are found and !(flags & regex_­constants​::​format_­no_­copy), then calls 

out = copy(first, last, out)

If any matches are found then, for each such match:

  • (1.1)

    If !(flags & regex_­constants​::​format_­no_­copy), calls 

    out = copy(m.prefix().first, m.prefix().second, out)
  • (1.2)

    Then calls 

    out = m.format(out, fmt, flags)

    for the first form of the function and 

    out = m.format(out, fmt, fmt + char_traits<charT>::length(fmt), flags)

    for the second.

Finally, if such a match is found and !(flags & regex_­constants​::​format_­no_­copy), calls 

out = copy(last_m.suffix().first, last_m.suffix().second, out)

where last_­m is a copy of the last match found. If flags & regex_­constants​::​format_­first_­only is nonzero, then only the first match found is replaced.

2
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Returns: out.

template <class traits, class charT, class ST, class SA, class FST, class FSA> basic_string<charT, ST, SA> regex_replace(const basic_string<charT, ST, SA>& s, const basic_regex<charT, traits>& e, const basic_string<charT, FST, FSA>& fmt, regex_constants::match_flag_type flags = regex_constants::match_default); template <class traits, class charT, class ST, class SA> basic_string<charT, ST, SA> regex_replace(const basic_string<charT, ST, SA>& s, const basic_regex<charT, traits>& e, const charT* fmt, regex_constants::match_flag_type flags = regex_constants::match_default);

3
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Effects: Constructs an empty string result of type basic_­string<charT, ST, SA> and calls: 

regex_replace(back_inserter(result), s.begin(), s.end(), e, fmt, flags);
4
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Returns: result.

template <class traits, class charT, class ST, class SA> basic_string<charT> regex_replace(const charT* s, const basic_regex<charT, traits>& e, const basic_string<charT, ST, SA>& fmt, regex_constants::match_flag_type flags = regex_constants::match_default); template <class traits, class charT> basic_string<charT> regex_replace(const charT* s, const basic_regex<charT, traits>& e, const charT* fmt, regex_constants::match_flag_type flags = regex_constants::match_default);

5
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Effects: Constructs an empty string result of type basic_­string<charT> and calls: 

regex_replace(back_inserter(result), s, s + char_traits<charT>::length(s), e, fmt, flags);
6
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Returns: result.