deductiongu...td::optional(3) C++ Standard Libary deductiongu...td::optional(3) NAME deductionguidesforstd::optional - deductionguidesforstd::optional Synopsis Defined in header <optional> template< class T > (since C++17) optional(T) -> optional<T>; One deduction guide is provided for std::optional to account for the edge cases missed by the implicit deduction guides, in particular, non-copyable ar- guments and array to pointer conversion. Example // Run this code #include <optional> #include <type_traits> int main() { int a[2]; std::optional oa{a}; // uses explicit deduction guide static_assert(std::is_same_v<decltype(oa), std::optional<int*>> == true); } http://cppreference.com 2024.06.10 deductiongu...td::optional(3)
Want to link to this manual page? Use this URL:
<https://man.FreeBSD.org/cgi/man.cgi?query=deductionguidesforstd::optional&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>