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  1. #include <iostream>
  2. #include <regex>
  3. #include <string>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.     const auto input = "-f name -b blah blah -e email"s;
  9.     smatch m;
  10.  
  11.     if(regex_search(input, m, regex{ "(?:\\s*-f\\s+(\\w+)|\\s*-b\\s+([^-]+)|\\s*-e\\s+(\\w+))*" })) {
  12.         if(m[1].length() > 0U) {
  13.             cout << "-f " << m[1] << endl;
  14.         }
  15.  
  16.         if(m[2].length() > 0U) {
  17.             cout << "-b " << m[2] << endl;
  18.         }
  19.  
  20.         if(m[3].length() > 0U) {
  21.             cout << "-e " << m[3] << endl;
  22.         }
  23.     }
  24. }
Success #stdin #stdout 0s 4280KB
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stdin
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Standard input is empty
stdout
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-f name
-b blah blah 
-e email
https://ideone.com/aHJYxC
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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