W3cubDocs

/C++

std::sub_match<BidirIt>::length

difference_type length() const;

Parameters

(none).

Return value

Returns the number of characters in the match, i.e. std::distance(first, second) if the match is valid, 0 otherwise.

Complexity

Constant.

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/regex/sub_match/length