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Modules | |
group() | |
sigc::group() alters an arbitrary functor by rebuilding its arguments from one or more lambda expressions. |
The lambda selectors sigc::_1, sigc::_2, ..., sigc::_9 are used to select the first, second, ..., nineth argument from a list.
std::cout << (sigc::_1 + 5)(3); // returns (3 + 5) std::cout << (sigc::_1 * sigc::_2)(7,10); // returns (7 * 10)