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std::regex_iterator::operator++,operator++(int)(3) C++ Standard Libary std::regex_iterator::operator++,operator++(int)(3)


std::regex_iterator::operator++,operator++(int) - std::regex_iterator::operator++,operator++(int)


regex_iterator& operator++(); (since C++11)
regex_iterator operator++(int); (since C++11)

Advances the iterator on the next match.

This section is incomplete
Reason: explain better

At first, a local variable of type BidirIt is constructed with the value of

If the iterator holds a zero-length match and start == end, *this is set to
end-of-sequence iterator and the function returns.

Otherwise, if the iterator holds a zero-length match the operator invokes the

regex_search(start, end, match, *pregex,
flags | regex_constants::match_not_null |

If the call returns true, the function returns.

Otherwise the operator increments start and continues as if the most recent match
was not a zero-length match.

If the most recent match was not a zero-length match, the operator sets flags to
flags | regex_constants::match_prev_avail and invokes the following:

regex_search(start, end, match, *pregex, flags);

If the call returns false, the iterator sets *this to the end-of-sequence iterator,
the function returns.

In all cases in which the call to regex_search returns true, match.prefix().first
will be equal to the previous value of match[0].second and for each index i in the
range [0, match.size()) for which match[i].matched is true, match[i].position() will
return distance(begin, match[i].first).

This means that match[i].position() gives the offset from the beginning of the
target sequence, which is often not the same as the offset from the sequence passed
in the call to regex_search.

It is unspecified how the implementation makes these adjustments. This means that a
compiler may call an implementation-specific search function, in which case a
user-defined specialization of regex_search will not be called.

The behavior is undefined if the iterator is end-of-sequence iterator.



Return value

1) *this
2) The previous value of the iterator.