[re.results.nonmember] (original) (raw)

28 Text processing library [text]

28.6 Regular expressions library [re]

28.6.9 Class template match_results [re.results]

28.6.9.9 Non-member functions [re.results.nonmember]

template<class BidirectionalIterator, class Allocator> bool operator==(const match_results<BidirectionalIterator, Allocator>& m1,const match_results<BidirectionalIterator, Allocator>& m2);

Returns: true if neither match result is ready, false if one match result is ready and the other is not.

If both match results are ready, returns true only if

• m1.empty() && m2.empty(), or
• !m1.empty() && !m2.empty(), and the following conditions are satisfied:
  • m1.prefix() == m2.prefix(),
  • m1.size() == m2.size() && equal(m1.begin(), m1.end(), m2.begin()), and
  • m1.suffix() == m2.suffix().