47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
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class rule_of_five
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{
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char* cstring; // raw pointer used as a handle to a dynamically-allocated memory block
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public:
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rule_of_five(const char* s = "")
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: cstring(nullptr)
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{
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if (s) {
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std::size_t n = std::strlen(s) + 1;
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cstring = new char[n]; // allocate
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std::memcpy(cstring, s, n); // populate
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}
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}
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~rule_of_five()
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{
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delete[] cstring; // deallocate
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}
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rule_of_five(const rule_of_five& other) // copy constructor
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: rule_of_five(other.cstring)
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{}
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rule_of_five(rule_of_five&& other) noexcept // move constructor
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: cstring(std::exchange(other.cstring, nullptr))
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{}
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rule_of_five& operator=(const rule_of_five& other) // copy assignment
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{
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return *this = rule_of_five(other);
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}
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rule_of_five& operator=(rule_of_five&& other) noexcept // move assignment
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{
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std::swap(cstring, other.cstring);
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return *this;
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}
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// alternatively, replace both assignment operators with
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// rule_of_five& operator=(rule_of_five other) noexcept
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// {
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// std::swap(cstring, other.cstring);
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// return *this;
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// }
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};
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