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std::match_results::prefix

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< cpp‎ | regex‎ | match results
Revision as of 17:31, 9 July 2013 by P12bot (Talk | contribs)

const_reference prefix() const;
(since C++11)

Parameters

(none)

Return value

Returns a sub_match representing the part of the target sequence between the beginning of the target sequence and the entire match of the regular expression.

Example

#include <iostream>
#include <regex>
#include <string>
 
int main()
{
  std::regex re("a(a)*b");
  std::string target("baaaby");
  std::smatch sm;
 
  std::regex_search(target, sm, re);
  std::cout << sm.prefix().str() << '\n';
}

Output:

b