Boost.Optional
This is an older version and was released in 2019. The current version is 1.86.0.
C++
11
Added in Boost
1.30.0
Categories:
Data
A value-semantic, type-safe wrapper for representing 'optional' (or 'nullable') objects of a given type. An optional object may or may not contain a value of the underlying type.
This Release
optional
A library for representing optional (nullable) objects in C++.
optional<int> readInt(); // this function may return either an int or a not-an-int
if (optional<int> oi = readInt()) // did I get a real int
cout << "my int is: " << *oi; // use my int
else
cout << "I have no int";
For more information refer to the documentation provided with this library.
All Time
Fernando Cacciola
Contributor
Steven Watanabe
Contributor
Beman Dawes
Contributor
Daniel James
Contributor
Andrey Semashev
Contributor
Stephen Kelly
Contributor
Troy D. Straszheim
Contributor
Dave Abrahams
Contributor
Marshall Clow
Contributor
Douglas Gregor
Contributor
Vladimir Prus
Contributor
Rene Rivera
Contributor
Matias Capeletto
Contributor
Peter Dimov
Contributor
John Maddock
Contributor
Michael A. Jackson
Contributor
Hartmut Kaiser
Contributor
Vicente J. Botet Escriba
Contributor
petamas
Contributor
Jürgen Hunold
Contributor
Jens Maurer
Contributor
Jeremiah Willcock
Contributor
Nikita Kniazev
Contributor
Vinnie Falco
Contributor
Daniel J. Hofmann
Contributor
Gennadiy Rozental
Contributor
Marcel Raad
Contributor
Andrey Semashev
Contributor
akumta
Contributor
Kohei Takahashi
Contributor
Olaf van der Spek
Contributor
Benjamin Roland Buch
Contributor
drivehappy
Contributor
Stefan Seefeld
Contributor
Kazutoshi SATODA
Contributor
Siddhant Saraf
Contributor
Tolga HOŞGÖR
Contributor
Anthony Leedom
Contributor
Anthony
Contributor
Daniel Seither
Contributor