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  1. #include <cstring>
  2. #include <iostream>
  3. #include <vector>
  4.  
  5. class STR {
  6.  public:
  7.   STR() : m_str(1, '\0') {}  // Empty string -> only a null-terminator
  8.  
  9.   STR(const char* str)
  10.     : m_str(&str[0], &str[strlen(str) + 1])  // Copy null-terminator as well
  11.   {
  12.   }
  13.  
  14.   std::size_t getSize() const noexcept { return m_str.size() - 1u; }
  15.   const char* getData() const { return m_str.data(); }
  16.   operator const char*() const { return m_str.data(); }
  17.  
  18.  private:
  19.   std::vector<char> m_str;
  20. };
  21.  
  22. std::ostream& operator<<(std::ostream& os, const STR& str)
  23. {
  24.     if (!str.getData())
  25.         return (os << "");
  26.     os << str.getData();
  27.     return os;
  28. }
  29.  
  30. auto main()->int
  31. {
  32.     //Object direct initialization
  33.     STR a{"Simple text"};
  34.     //Object direct initialization
  35.     STR b = "Another text";
  36.     STR c = a;
  37.     //Empty obj creation
  38.     STR d;
  39.     std::cout << "d:" << d << '\n';
  40.     //Empty object assignment
  41.     d = std::move(c);
  42.     std::cout << "d:" << d << '\n';
  43.     //Existing object assignment
  44.     b = d;
  45.     std::cout << "b:" << b << '\n';
  46.     //Object assigment using const char*
  47.     a = "What next";
  48.     std::cout << "a:" << a <<'\n';
  49. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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d:
d:Simple text
b:Simple text
a:What next
https://ideone.com/3D06K2
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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