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[specialized.algorithms.general]
26 Algorithms library [algorithms]
26.11 Specialized algorithms [specialized.algorithms]
26.11.1 General [specialized.algorithms.general]
The contents specified in [specialized.algorithms] are declared in the header .
Unless otherwise specified, if an exception is thrown in the following algorithms, objects constructed by a placement new-expression ([expr.new]) are destroyed in an unspecified order before allowing the exception to propagate.
[Note 1:
When new objects are created by the algorithms specified in [specialized.algorithms], the lifetime ends for any existing objects (including potentially-overlapping subobjects [intro.object]) in storage that is reused [basic.life].
â end note]
Some algorithms specified in [specialized.algorithms] make use of the following exposition-only function templates:templateconstexpr void* voidify(T& obj) noexcept {return addressof(obj); }templatedecltype(auto) deref-move(I& it) {if constexpr (is_lvalue_reference_v<decltype(*it)>)return std::move(*it); elsereturn *it; }