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Single header implementation of `std::optional` with functional-style extensions and support for references. Single header implementation of `std::optional` with functional-style extensions and support for references.
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`std::optional` is the preferred way to represent an object which may or may not have a value. Unfortunately, chaining together many computations which may or may not produce a value can be verbose, as empty-checking code will be mixed in with the actual programming logic. This implementation provides a number of utilities to make coding with `optional` cleaner. `std::optional` is the preferred way to represent an object which may or may not have a value. Unfortunately, chaining together many computations which may or may not produce a value can be verbose, as empty-checking code will be mixed in with the actual programming logic. This implementation provides a number of utilities to make coding with `optional` cleaner.