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std::experi...::Predicate(3) C++ Standard Libary std::experi...::Predicate(3) NAME std::experimental::ranges::Predicate - std::experimental::ranges::Pred- icate Synopsis Defined in header <experimental/ranges/concepts> template < class F, class... Args > concept bool Predicate = (ranges TS) RegularInvocable<F, Args...> && Boolean<std::result_of_t<F&&(Args&&...)>>; The concept Predicate<F, Args...> specifies that F is a predicate that accepts arguments whose types and value categories are encoded by Args..., i.e., it can be invoked with these arguments to produce a Boolean result. Note that RegularInvocable requires the invocation to not modify ei- ther the callable object or the arguments and be equality-preserving. Equality preservation An expression is equality preserving if it results in equal outputs given equal inputs. * The inputs to an expression consist of its operands. * The outputs of an expression consist of its result and all operands modified by the expression (if any). Every expression required to be equality preserving is further re- quired to be stable: two evaluations of such an expression with the same input objects must have equal outputs absent any explicit intervening modification of those input objects. http://cppreference.com 2022.07.31 std::experi...::Predicate(3)
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