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  1. #include <regex>
  2. #include <string>
  3. #include <iostream>
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.         string data("xx");
  9.         std::regex pattern("((?=x))*");
  10.         std::smatch result;
  11.  
  12.         if (regex_search(data, result, pattern)) {
  13.               std::cout << "\"" << result[0].str() << "\"" << std::endl;
  14.         }
  15.         else
  16.         {
  17.               std::cout << "regex_search failed!" << std::endl;	
  18.         }
  19.         if (regex_match(data, result, pattern)) {
  20.               std::cout << result[0].str() << std::endl;
  21.         }
  22.         else
  23.         {
  24.               std::cout << "regex_match failed!" << std::endl;	
  25.         }
  26.  
  27. }
Success #stdin #stdout 0s 3500KB
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stdin
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Standard input is empty
stdout
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""
regex_match failed!
https://ideone.com/LDXVm8
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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