August 2017
Intermediate to advanced
438 pages
14h 19m
English
Content preview from Boost C++ Application Development Cookbook - Second Edition
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How it works...
The boost::variant class holds an array of bytes and stores values in that array. The size of the array is determined at compile time by applying sizeof() and functions to get alignment to each of the template types. On assignment, or construction of boost::variant, the previous values are in-place destructed and new values are constructed on top of the byte array, using the placement new.
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