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  1. #include <iostream>
  2. #include <string>
  3. #include <array>
  4. #include <cstring>
  5. #include <cassert>
  6.  
  7. template<class e, class t, int N>
  8. std::basic_istream<e,t>& operator>>(std::basic_istream<e,t>& in, const e(&str_lit)[N]) {
  9.     std::array<e, N-1> buffer; //get buffer
  10.     in >> std::ws; //skips whitespace
  11.     if (N)        
  12.         in.read(&buffer[0], N-1); //read the rest
  13.     if (strncmp(&buffer[0], str_lit, N-1)) //if it failed
  14.         in.setstate(in.rdstate() | std::ios::badbit); //set the state
  15.     return in;
  16. }
  17. template<class e, class t>
  18. std::basic_istream<e,t>& operator>>(std::basic_istream<e,t>& in, const e& char_lit) {
  19.     e buffer;  //get buffer
  20.     in >> buffer; //read data
  21.     if (buffer != char_lit) //if it failed
  22.         in.setstate(in.rdstate() | std::ios::badbit); //set the state
  23.     return in;
  24. }
  25. //redirect mutable char arrays to their normal function
  26. template<class e, class t, int N>
  27. std::basic_istream<e,t>& operator>>(std::basic_istream<e,t>& in, e(&carray)[N]) {
  28. 	return std::operator>>(in, carray);
  29. }
  30.  
  31. int main()
  32. {
  33. 	std::string s;
  34.         if (std::cin >> '(' >> s >> ')')
  35.             std::cout << "SUCCEED";
  36.         else
  37.             std::cout << "FAIL";
  38. }
Success #stdin #stdout 0s 3020KB
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https://ideone.com/vjX7j
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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