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optional
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========
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A library for representing optional (nullable) objects in C++.
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```cpp
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optional<int> readInt(); // this function may return either an int or a not-an-int
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if (optional<int> oi = readInt()) // did I get a real int
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cout << "my int is: " << *oi; // use my int
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else
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cout << "I have no int";
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```
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For more information refer to the documentation provided with this library.
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