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  1. #include <utility>
  2. #include <cstring>
  3. #include <cstdint>
  4.  
  5. #include <iostream>
  6.  
  7. template <typename PatternT>
  8. struct raw_bytes
  9. {
  10. public:
  11.     template <
  12.     	typename ArgT,
  13.     	typename std::enable_if<sizeof(ArgT) == sizeof(PatternT)>::type* = nullptr
  14.     >
  15.     raw_bytes(ArgT arg)
  16.     {
  17.         std::memcpy(&value, &arg, sizeof(PatternT));
  18.     }
  19.  
  20.     template <
  21.     	typename ArgT,
  22.     	size_t N,
  23.     	typename std::enable_if<N * sizeof(ArgT) == sizeof(PatternT)>::type* = nullptr>
  24.     raw_bytes(ArgT const (&arg)[N])
  25.     {
  26.         std::memcpy(&value, arg, sizeof(PatternT));
  27.     }
  28.  
  29.     operator PatternT const &() const
  30.     {
  31.         return value;
  32.     }
  33.  
  34. private:
  35.     PatternT value;
  36. };
  37.  
  38. void foo(raw_bytes<uint64_t> bytes)
  39. {
  40. 	std::cout << bytes << std::endl;
  41. }
  42.  
  43.  
  44. int main() {
  45. 	foo(1.23456e+2);
  46. 	return 0;
  47. }
Success #stdin #stdout 0s 3296KB
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4638387860618067575
https://ideone.com/Rb8hvi
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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