std::match_results<BidirIt,Alloc>::empty - cppreference.com

C++

Text processing library

Regular expressions library

Classes

(C++11)

Algorithms
Iterators
Exceptions
Traits
Constants

(C++11)

Regex Grammar
std::match_results

bool empty() const;

(since C++11)

Checks whether the match was successful.

Parameters

(none)

Return value

true if *this represents the result of a failed match, false otherwise, i.e. size() == 0.

Exceptions

May throw implementation-defined exceptions.

Complexity

Constant.

See also

returns the number of matches in a fully-established result state
(public member function) [edit]