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  1. // enabl.cc -*- mode:c++, compile-command:"g++ -Wall -Wextra -pedantic -std=c++0x enabl.cc -o enabl && ./enabl" -*-
  2. #include <iostream>
  3. #include <algorithm>
  4. #include <vector>
  5.  
  6. template <bool R, bool W>
  7. struct X {
  8.   template <bool Enabled = R,
  9.             typename = typename std::enable_if<Enabled>::type>
  10.   void read() {}
  11.   template <bool Enabled = W,
  12.             typename = typename std::enable_if<Enabled>::type>
  13.   void write() {}
  14.   bool is_open() const {};
  15. };
  16.  
  17. int main()
  18. {
  19.   { X<true, true> x; x.read(); x.write(); }
  20.   { X<false, true> x;          x.write(); }
  21.   { X<true, false> x; x.read(); }
  22.   { X<false, false> x;  }
  23. }
  24.  
  25.  
Success #stdin #stdout 0s 2880KB
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https://ideone.com/7PQh2D
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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